Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device. The optical lens comprises first to seventh lenses in sequence from a first side to a second side along an optical axis. The first lens has a negative focal power. The first side of the first lens is a convex surface, and the second side of the first lens is a concave surface. The second lens has a negative focal power. The first side of the second lens is a concave surface. The third lens has a positive focal power. The first side of the third lens and / or the second side of the third lens is a convex surface. The fourth lens has a positive focal power. The first side of the fourth lens and / or the second side of the fourth lens is a convex surface. The fifth lens has a focal power. The sixth lens has a focal power. The seventh lens has a positive focal power. The fifth lens and the sixth lens are cemented to form a cemented lens.

Description

Technical Field

[0001] This application relates to the field of optical components, and more specifically, to an optical lens and electronic device. Background Technology

[0002] In automotive imaging systems, optical lenses are core components for acquiring road conditions and ensuring driving safety; their performance directly affects the accuracy and reliability of driver assistance functions. With the continuous iteration and upgrading of autonomous driving technology, the market is placing higher demands on automotive optical lenses. Specifically, automotive optical lenses not only need to effectively solve the problem of weak ghosting interference, but also need to further shorten the back focal length to adapt to the compact vehicle space layout, achieving miniaturized lens design to meet the development trend of integrated and intelligent automotive equipment.

[0003] In conclusion, there is an urgent need in the market for an automotive optical lens that can effectively solve the problem of weak ghosting, while also achieving miniaturized optical lens design without affecting imaging performance. Utility Model Content

[0004] The first aspect of this application provides an optical lens comprising, sequentially from a first side to a second side along an optical axis: a first lens having negative optical power, wherein a first side surface of the first lens is convex and a second side surface of the first lens is concave; a second lens having negative optical power, wherein a first side surface of the second lens is concave; a third lens having positive optical power, wherein a first side surface and / or a second side surface of the third lens is convex; a fourth lens having positive optical power, wherein a first side surface and / or a second side surface of the fourth lens is convex; and a fifth lens having optical power... The optical lens comprises: a sixth lens with optical power; a seventh lens with positive optical power; wherein the fifth lens and the sixth lens are cemented together to form a cemented lens; the optical power of the fifth lens and the sixth lens have opposite positive and negative attributes; the number of lenses with optical power in the optical lens is seven; the optical lens satisfies: 0.01≤d6 / d7≤0.39 and 0.95≤BFL / F≤2.22; wherein d6 is the center distance between the third lens and the fourth lens, d7 is the center thickness of the fourth lens, F is the focal length of the optical lens, and BFL is the optical back focal length of the optical lens.

[0005] According to an exemplary embodiment of this application, the second side surface of the second lens is a convex surface or a concave surface.

[0006] According to an exemplary embodiment of the present application, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface; alternatively, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a concave surface; or alternatively, the first side surface of the third lens is a concave surface, and the second side surface of the third lens is a convex surface.

[0007] According to an exemplary embodiment of the present application, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a convex surface; alternatively, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface; or alternatively, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

[0008] According to an exemplary embodiment of the present application, the fifth lens has positive optical power, and the sixth lens has negative optical power.

[0009] According to an exemplary embodiment of the present application, the fifth lens has negative optical power, and the sixth lens has positive optical power.

[0010] According to an exemplary embodiment of the present application, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a convex surface; alternatively, the first side surface of the fifth lens is a concave surface, and the second side surface of the fifth lens is a convex surface; or alternatively, the first side surface of the fifth lens is a concave surface, and the second side surface of the fifth lens is a concave surface; or alternatively, the first side surface of the fifth lens is a convex surface, and the second side surface of the fifth lens is a concave surface.

[0011] According to an exemplary embodiment of the present application, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a convex surface; alternatively, the first side surface of the seventh lens is a concave surface, and the second side surface of the seventh lens is a convex surface; or alternatively, the first side surface of the seventh lens is a convex surface, and the second side surface of the seventh lens is a concave surface.

[0012] According to an exemplary embodiment of the present application, the back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.14≤BFL / TTL≤0.32.

[0013] According to an exemplary embodiment of the present application, the sag SAG14 of the second side surface of the seventh lens and the central thickness d13 of the seventh lens satisfy: 0.04≤|SAG14 / d13|≤0.48.

[0014] According to an exemplary embodiment of the present application, the central spacing d2 between the first lens and the second lens and the focal length F of the optical lens satisfy: 0.7≤d2 / F≤1.24.

[0015] According to an exemplary embodiment of the present application, the center distance d2 between the first lens and the second lens and the total optical length TTL of the optical lens satisfy: 0.1≤d2 / TTL≤0.18.

[0016] According to an exemplary embodiment of the present application, the focal length F7 of the seventh lens and the focal length F of the optical lens satisfy: 2≤F7 / F≤10.

[0017] According to an exemplary embodiment of the present application, the focal length F7 of the seventh lens and the focal length F of the optical lens satisfy: 4.5≤F7 / F≤7.8.

[0018] According to an exemplary embodiment of the present application, the focal length F1 of the first lens and the focal length F of the optical lens satisfy: -2.75≤F1 / F≤-1.35.

[0019] According to an exemplary embodiment of the present application, the focal length F1 of the first lens and the focal length F of the optical lens satisfy: -2.1≤F1 / F≤-1.5.

[0020] According to an exemplary embodiment of the present application, the maximum clear aperture D of the optical lens, the full image height H of the optical lens and the focal length F of the optical lens satisfy: 0.24≤D / H / F≤0.52.

[0021] According to an exemplary embodiment of the present application, the radius of curvature R1 of the first side surface of the first lens and the total optical length TTL of the optical lens satisfy: 0.33≤R1 / TTL≤0.79.

[0022] According to an exemplary embodiment of the present application, the focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens and the maximum clear aperture D of the optical lens satisfy: 0.41≤(F×θ) / D≤0.91.

[0023] According to an exemplary embodiment of the present application, the center distance d4 between the second lens and the third lens, the radius of curvature R4 of the second side surface of the second lens and the radius of curvature R5 of the first side surface of the third lens satisfy: 0.08≤|(d4-R4) / R5|≤0.78.

[0024] According to an exemplary embodiment of the present application, the total optical length TTL of the optical lens and the maximum clear aperture D of the optical lens satisfy: 1.38≤TTL / D≤3.07.

[0025] According to an exemplary embodiment of the present application, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy: -1.47≤F5 / F6≤-0.63.

[0026] According to an exemplary embodiment of this application, the second side curvature radius R2 of the first lens and the first side curvature radius R3 of the second lens satisfy: -0.77≤R2 / R3≤-0.29.

[0027] According to an exemplary embodiment of this application, the second side height SAG2 of the first lens, the aperture D2 corresponding to the maximum field of view of the optical lens, the first side height SAG3 of the second lens, and the aperture D3 corresponding to the maximum field of view of the optical lens satisfy: -5.2≤(SAG2 / D2) / (SAG3 / D3)≤-1.66.

[0028] According to an exemplary embodiment of this application, the center thickness d1 of the first lens, the center thickness d3 of the second lens, the center thickness d5 of the third lens, the center thickness d7 of the fourth lens, the center thickness d10 of the fifth lens, the center thickness d11 of the sixth lens, and the center thickness d13 of the seventh lens satisfy: 0.41≤(d1+d3+d5+d7+d10+d11+d13) / TTL≤0.69.

[0029] According to an exemplary embodiment of this application, the optical power φ1 of the first lens, the optical power φ2 of the second lens, and the optical power φ of the optical lens satisfy: 0.69≤(|φ1|+|φ2|) / |φ|≤1.22.

[0030] According to an exemplary embodiment of this application, the second side height SAG14 of the seventh lens and the aperture D14 corresponding to the maximum field of view of the optical lens on the second side of the seventh lens satisfy: -0.19≤SAG14 / D14≤-0.01.

[0031] According to an exemplary embodiment of this application, the center distance d4 between the second lens and the third lens and the total optical length TTL of the optical lens satisfy: 0.002≤d4 / TTL≤0.098.

[0032] According to an exemplary embodiment of this application, the focal length F2 of the second lens and the focal length F of the optical lens satisfy: -6.2≤F2 / F≤-1.3.

[0033] According to an exemplary embodiment of this application, the first side curvature radius R7 of the fourth lens, the center thickness d7 of the fourth lens, and the second side curvature radius R8 of the fourth lens satisfy: -4.67≤R7 / (d7+R8)≤10.44.

[0034] According to an exemplary embodiment of this application, the center distance d6 between the third lens and the fourth lens and the focal length F of the optical lens satisfy: 0.02≤d6 / F≤0.43.

[0035] According to an exemplary embodiment of this application, the second side angle of the seventh lens, arctan(1 / K(S14)), satisfies: 7≤|arctan(1 / K(S14))|≤54.

[0036] According to an exemplary embodiment of this application, the focal length F4 of the fourth lens and the focal length F of the optical lens satisfy: 1.88≤F4 / F≤4.96.

[0037] According to an exemplary embodiment of this application, the focal length F3 of the third lens and the focal length F of the optical lens satisfy: 1.63≤F3 / F≤5.55.

[0038] According to an exemplary embodiment of this application, the center distance d12 between the sixth lens and the seventh lens and the total optical length TTL of the optical lens satisfy: 0.05≤d12 / TTL≤0.11.

[0039] According to an exemplary embodiment of this application, the center distance d2 between the first lens and the second lens and the focal length F1 of the first lens satisfy: 0.25≤|d2 / F1|≤0.82.

[0040] According to an exemplary embodiment of this application, the center distance d6 between the third lens and the fourth lens, the focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy: 0 < d6 / (F3+F4) ≤ 0.1.

[0041] According to an exemplary embodiment of this application, the Abbe number Vd2 of the second lens and the Abbe number Vd1 of the first lens satisfy: Vd2 > 1.8Vd1.

[0042] According to an exemplary embodiment of this application, the radius of curvature at the edge of the second side surface of the seventh lens is smaller than the radius of curvature at the center of the second side surface of the seventh lens.

[0043] According to an exemplary embodiment of this application, the optical back focal length BFL of the optical lens and the focal length F7 of the seventh lens satisfy: 0.17≤BFL / F7≤0.67.

[0044] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships:

[0045] 1.11≤BFL / F≤1.94, 0.16≤BFL / TTL≤0.29, 0.04≤|SAG14 / d13|≤0.75, 0.81≤d2 / F≤1.08, 0.11≤d2 / TTL≤0.16, 2.83≤F7 / F≤7.67, -2.39≤F1 / F≤-1.58, 0.27≤D / H / F≤0.46, 0.38≤R1 / TTL≤0.69, 0.47≤(F×θ) / D≤0.79, 0.09≤|(d4-R4) / R5|≤0.69, 1.62≤TTL / D≤2.67, -1.4≤F5 / F6≤-0.73, -0.68≤R2 / R3≤-0.34, -4.6≤(SAG2 / D2) / (SAG3 / D3)≤-1.9, 0.48≤(d1+d3+d5+d7+d10+d11+d13) / TTL≤0.61, 0.81≤(|φ1|+|φ2|) / |φ|≤1.07, -0.17≤SAG14 / D14≤-0.01, 0.003≤d4 / TTL≤0.085, -6.02≤F2 / F≤-1.5, -4.07≤R7 / (d7+R8)≤9.09, 0.015≤d6 / d7≤0.35, 0.02≤d6 / F≤0.38, 8≤|arctan(1 / K(S14))|≤47, 2.21≤F4 / F≤4.32, 1.93≤F3 / F≤4.82 and 0.002≤d6 / (F3+F4)≤0.08;

[0046] Wherein, BFL is the optical back focal length of the optical lens, TTL is the total optical length of the optical lens, D is the maximum aperture of the optical lens, H is the holographic height of the optical lens, F is the focal length of the optical lens, θ is the maximum field of view in radians of the optical lens, φ is the optical power of the optical lens, R1 is the radius of curvature of the first side surface of the first lens, R2 is the radius of curvature of the second side surface of the first lens, R3 is the radius of curvature of the first side surface of the second lens, and R4 is the radius of curvature of the second side surface of the second lens. R5 is the radius of curvature of the first side surface of the third lens, R7 is the radius of curvature of the first side surface of the fourth lens, R8 is the radius of curvature of the second side surface of the fourth lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, SAG2 is the sagitta of the second side surface of the first lens, and SAG3 is the sagitta of the first side surface of the second lens. The surface elevation is defined as follows: SAG14 is the surface elevation of the second side of the seventh lens; d1 is the center thickness of the first lens; d2 is the center distance between the first and second lenses; d3 is the center thickness of the second lens; d4 is the center distance between the second and third lenses; d5 is the center thickness of the third lens; d6 is the center distance between the third and fourth lenses; d7 is the center thickness of the fourth lens; d10 is the center thickness of the fifth lens; d11 is the center thickness of the sixth lens; d13 is the center thickness of the seventh lens; D2 is the aperture corresponding to the second side of the first lens at the maximum field of view of the optical lens; D3 is the aperture corresponding to the first side of the second lens at the maximum field of view of the optical lens; D14 is the aperture corresponding to the second side of the seventh lens at the maximum field of view of the optical lens; φ1 is the optical power of the first lens; φ2 is the optical power of the second lens; and arctan(1 / K(S14)) is the angle subtended by the second side of the seventh lens.

[0047] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships:

[0048] 1.113≤BFL / F≤1.932, 0.163≤BFL / TTL≤0.282, 0.048≤|SAG14 / d13|≤0.414, 0.818≤d2 / F≤1.076, 0.119≤d2 / TTL≤0.157, 2.837≤F7 / F≤7.669, -2.39≤F1 / F≤-1.592, 0.277≤D / H / F≤0.454, 0.389≤R1 / TTL≤0.687, 0.478≤(F×θ) / D≤0.787, 0.095≤|(d4-R4) / R5|≤0.682, 1.622≤TTL / D≤2.667, -1.274≤F5 / F6≤-0.739, -0.67≤R2 / R3≤-0.34, -4.521≤(SAG2 / D2) / (SAG3 / D3)≤-1.959, 0.486≤(d1+d3+d5+d7+d10+d11+d13) / TTL≤0.603, 0.817≤(|φ1|+|φ2|) / |φ|≤1.061, -0.167≤SAG14 / D14≤-0.015, 0.003≤d4 / TTL≤0.084, -5.232≤F2 / F≤-1.765, -4.063≤R7 / (d7+R8)≤9.079, 0.018≤d6 / d7≤0.341, 0.021≤d6 / F≤0.372, 8.54≤|arctan(1 / K(S14))|≤46.356, 2.218≤F4 / F≤4.311, 1.931≤F3 / F≤4.819, 0.346≤|d2 / F1|≤0.641, 0.003≤d6 / (F3+F4)≤0.071 and 0.007≤d12 / TTL≤0.096;

[0049] Wherein, BFL is the optical back focal length of the optical lens, TTL is the total optical length of the optical lens, D is the maximum aperture of the optical lens, H is the holographic height of the optical lens, F is the focal length of the optical lens, θ is the maximum field of view in radians of the optical lens, φ is the optical power of the optical lens, R1 is the radius of curvature of the first side surface of the first lens, R2 is the radius of curvature of the second side surface of the first lens, R3 is the radius of curvature of the first side surface of the second lens, R4 is the radius of curvature of the second side surface of the second lens, and R5 is the... The radius of curvature of the first side surface of the third lens, R7 is the radius of curvature of the first side surface of the fourth lens, R8 is the radius of curvature of the second side surface of the fourth lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, F7 is the focal length of the seventh lens, SAG2 is the sagitta of the second side surface of the first lens, SAG3 is the sagitta of the first side surface of the second lens, and SAG14 is the radius of curvature of the second side surface of the fourth lens. The seventh lens has a second side profile sag, d1 is the center thickness of the first lens, d2 is the center distance between the first and second lenses, d3 is the center thickness of the second lens, d4 is the center distance between the second and third lenses, d5 is the center thickness of the third lens, d6 is the center distance between the third and fourth lenses, d7 is the center thickness of the fourth lens, d10 is the center thickness of the fifth lens, d11 is the center thickness of the sixth lens, d12 is the center distance between the sixth and seventh lenses, d13 is the center thickness of the seventh lens, D2 is the aperture corresponding to the second side profile of the first lens and the maximum field of view of the optical lens, D3 is the aperture corresponding to the first side profile of the second lens and the maximum field of view of the optical lens, D14 is the aperture corresponding to the second side profile of the seventh lens and the maximum field of view of the optical lens, φ1 is the optical power of the first lens, φ2 is the optical power of the second lens, and arctan(1 / K(S14)) is the angle subtended by the second side profile of the seventh lens.

[0050] The second aspect of this application provides an electronic device comprising an optical lens as described in the exemplary embodiments above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, the light source is located on a second side of the optical lens, and the light emitted by the light source is projected onto a first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side of the optical lens.

[0051] The optical lens according to the embodiments of this application employs seven lenses with optical power. The first lens has negative optical power, with a convex first side and a concave second side. The second lens has negative optical power, with a concave first side. The third lens has positive optical power, with a convex first side and / or a convex second side. The fourth lens has positive optical power, with a convex first side and / or a convex second side. The fifth lens has optical power. The sixth lens has optical power. The seventh lens has positive optical power. The fifth lens and the sixth lens are cemented together to form a cemented lens. The optical power of the fifth lens and the sixth lens have opposite polarities. The negative optical power design of the first lens enables it to collect diverging light rays with a large field of view. Under the same field of view, the optical system behind the first lens has a larger light-receiving surface, thereby increasing the aperture, achieving a greater amount of light intake, and increasing image brightness. The first side of the first lens being convex serves at least three purposes: first, it facilitates the entry of large-angle incident light into the lens, increasing the lens's light transmission; second, it suppresses the retention of water droplets and dust on the first side of the first lens; and third, it disperses external impacts, reducing the risk of lens breakage. Similarly, the second side of the first lens being concave serves at least three purposes: first, it helps balance the optical path in conjunction with the rear lens elements, reducing aberrations; second, it adjusts the image field flatness, ensuring sharpness at both the edges and center of the image; and third, it helps reduce the optical path length, making the lens more compact. Light diverging from the first lens travels to the second lens, and then transitions to the third lens. The negative optical power design of the second lens can be paired with the positive optical power design of the third lens to help reduce aberrations and improve system resolution. The concave design of the first side of the second lens not only facilitates light divergence and corrects the optical path of the optical system but also helps reduce the center thickness of the second lens, thus reducing lens weight. The positive optical power of the third lens converges the front-group light rays and compresses their trajectory, playing a crucial role in reducing the overall size of the lens. Furthermore, the first and second lenses, with negative optical power, compensate for the third lens, which has positive optical power, greatly reducing system aberrations at the third lens. If the first side of the third lens is convex, it can converge the diverging light rays emitted from the second side of the second lens, balancing the resolving power at the edges and center of the image. Additionally, the curvature effect of the convex design reduces the focal length of the third lens, making the entire system more compact. If the second side of the third lens is convex, it further converges the light rays before they exit from the third lens, reducing the diameter of the rear lens elements and contributing to lens miniaturization and reduced manufacturing costs. The fourth lens, with positive optical power, converges the light rays emitted from the third lens a second time.If the first side of the fourth lens is convex, it can suppress the front group of light rays, making the light relatively flat and reducing the system sensitivity. If the second side of the fourth lens is convex, it can change the light trajectory, suppress the height of subsequent light rays, and thus reduce the rear aperture, which helps to achieve system miniaturization. Under the conditions of positive optical power design of the third and fourth lenses, and convex design of the first and / or second side of the third lens, and convex design of the first and / or second side of the fourth lens, the ratio between the center distance d6 between the third and fourth lenses and the center thickness d7 of the fourth lens can be further controlled. This allows for optimization of the light propagation path between the third and fourth lenses within a miniaturized framework, to achieve functions such as aberration correction, and to avoid sacrificing optical performance simply for the sake of small size. The light rays emitted from the fourth lens pass through the fifth and sixth lenses in sequence, and then reach the seventh lens. The cemented lens, formed by cementing the fifth and sixth lenses with opposite optical power properties, offers at least five advantages: First, it reduces the air gap between the fifth and sixth lenses, thus lowering the overall length of the optical system. Second, the chromatic aberration of the fifth and sixth lenses is complementary, which helps reduce chromatic aberration and improve image quality. Third, it reduces the number of assembly components between the fifth and sixth lenses, thereby reducing processes and lowering costs. Fourth, it reduces field curvature and corrects off-axis point aberrations. Fifth, it allows for reasonable focal length allocation, facilitating thermal compensation and achieving good temperature performance. The positive optical power design of the seventh lens not only balances aberrations and improves resolving power but also suppresses the ray trajectory at the edge of the field of view, helping to reduce CRA (Cryogenic Aberration). Furthermore, by controlling the ratio between the optical back focal length (BFL) and the total optical length (TTL) of the optical lens, a longer back focal length can be achieved. This not only allows for miniaturization and provides more assembly space, facilitating adjustments and assembly by module manufacturers but also effectively reduces ghosting energy. Attached Figure Description

[0052] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0053] Figure 1 A schematic diagram of the structure of an optical lens according to Embodiment 1 of this application is shown;

[0054] Figure 2 The modulation transfer function (MTF) curve of the optical lens according to Embodiment 1 of this application is shown.

[0055] Figure 3 A schematic diagram of the structure of an optical lens according to Embodiment 2 of this application is shown;

[0056] Figure 4 The modulation transfer function curve of the optical lens according to Embodiment 2 of this application is shown;

[0057] Figure 5 A schematic diagram of the structure of an optical lens according to Embodiment 3 of this application is shown;

[0058] Figure 6 The modulation transfer function curve of the optical lens according to Embodiment 3 of this application is shown;

[0059] Figure 7 A schematic diagram of the structure of an optical lens according to Embodiment 4 of this application is shown;

[0060] Figure 8 The modulation transfer function curve of the optical lens according to Embodiment 4 of this application is shown;

[0061] Figure 9 A schematic diagram of the structure of an optical lens according to Embodiment 5 of this application is shown;

[0062] Figure 10 The modulation transfer function curve of the optical lens according to Embodiment 5 of this application is shown;

[0063] Figure 11 A schematic diagram of the structure of an optical lens according to Embodiment 6 of this application is shown;

[0064] Figure 12 The modulation transfer function curve of the optical lens according to Embodiment 6 of this application is shown;

[0065] Figure 13 A schematic diagram of the structure of an optical lens according to Embodiment 7 of this application is shown;

[0066] Figure 14 The modulation transfer function curve of the optical lens according to Embodiment 7 of this application is shown;

[0067] Figure 15 A schematic diagram of the structure of an optical lens according to Embodiment 8 of this application is shown;

[0068] Figure 16 The modulation transfer function curve of the optical lens according to Embodiment 8 of this application is shown;

[0069] Figure 17 A schematic diagram of the structure of an optical lens according to Embodiment 9 of this application is shown;

[0070] Figure 18 The modulation transfer function curve of the optical lens according to Embodiment 9 of this application is shown;

[0071] Figure 19A schematic diagram of the structure of an optical lens according to Embodiment 10 of this application is shown;

[0072] Figure 20 The modulation transfer function curve of the optical lens according to Embodiment 10 of this application is shown;

[0073] Figure 21 A schematic diagram of the structure of an optical lens according to Embodiment 11 of this application is shown;

[0074] Figure 22 The modulation transfer function curve of the optical lens according to Embodiment 11 of this application is shown;

[0075] Figure 23 A schematic diagram of the structure of an optical lens according to Embodiment 12 of this application is shown;

[0076] Figure 24 The modulation transfer function curve of the optical lens according to Embodiment 12 of this application is shown;

[0077] Figure 25 A schematic diagram of the structure of an optical lens according to Embodiment 13 of this application is shown;

[0078] Figure 26 The modulation transfer function curve of the optical lens according to Embodiment 13 of this application is shown;

[0079] Figure 27 A schematic diagram of the structure of an optical lens according to Embodiment 14 of this application is shown;

[0080] Figure 28 The modulation transfer function curve of the optical lens according to Embodiment 14 of this application is shown;

[0081] Figure 29 A schematic diagram of the structure of an optical lens according to Embodiment 15 of this application is shown;

[0082] Figure 30 The modulation transfer function curve of the optical lens according to Embodiment 15 of this application is shown;

[0083] Figure 31 A schematic diagram of the structure of an optical lens according to Embodiment 16 of this application is shown;

[0084] Figure 32 The modulation transfer function curve of the optical lens according to Embodiment 16 of this application is shown;

[0085] Figure 33 A schematic diagram of the structure of an optical lens according to Embodiment 17 of this application is shown;

[0086] Figure 34The modulation transfer function curve of the optical lens according to Embodiment 17 of this application is shown;

[0087] Figure 35 A schematic diagram of the structure of an optical lens according to Embodiment 18 of this application is shown;

[0088] Figure 36 The modulation transfer function curve of the optical lens according to Embodiment 18 of this application is shown;

[0089] Figure 37 A schematic diagram of the structure of an optical lens according to Embodiment 19 of this application is shown;

[0090] Figure 38 The modulation transfer function curve of the optical lens according to Embodiment 19 of this application is shown;

[0091] Figure 39 A schematic diagram of the structure of an optical lens according to Embodiment 20 of this application is shown;

[0092] Figure 40 The modulation transfer function curve of the optical lens according to Embodiment 20 of this application is shown;

[0093] Figure 41 A schematic diagram of the structure of an optical lens according to Embodiment 21 of this application is shown;

[0094] Figure 42 The modulation transfer function curve of the optical lens according to Embodiment 21 of this application is shown;

[0095] Figure 43 A schematic diagram of the structure of an optical lens according to Embodiment 22 of this application is shown;

[0096] Figure 44 The modulation transfer function curve of the optical lens according to Embodiment 22 of this application is shown;

[0097] Figure 45 A schematic diagram of the structure of an optical lens according to Embodiment 23 of this application is shown;

[0098] Figure 46 The modulation transfer function curve of the optical lens according to Embodiment 23 of this application is shown;

[0099] Figure 47 A schematic diagram of the structure of an optical lens according to Embodiment 24 of this application is shown;

[0100] Figure 48 The modulation transfer function curve of the optical lens according to Embodiment 24 of this application is shown;

[0101] Figure 49A schematic diagram of the structure of an optical lens according to Embodiment 25 of this application is shown;

[0102] Figure 50 The modulation transfer function curve of the optical lens according to Embodiment 25 of this application is shown;

[0103] Figure 51 A schematic diagram of the structure of an optical lens according to Embodiment 26 of this application is shown;

[0104] Figure 52 The modulation transfer function curve of the optical lens according to Embodiment 26 of this application is shown. Detailed Implementation

[0105] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0106] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of this application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0107] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not drawn strictly to scale.

[0108] In this paper, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the first side is called the first side surface of the lens, and the surface of each lens closest to the second side is called the second side surface of the lens.

[0109] It should also be understood that the terms "comprising," "including," and / or "having," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.

[0110] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formalized sense, unless expressly so specified herein.

[0111] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0112] The features, principles and other aspects of this application are described in detail below.

[0113] An optical lens according to an exemplary embodiment of this application may include, for example, seven lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0114] In an exemplary embodiment, the optical lens provided in this application can be used as a light receiving lens or a light emitting lens, wherein: the light receiving lens is generally used to collect light from the object-side space, and the collected light is used to form detection information, including but not limited to imaging, laser point clouds, etc.; the light emitting lens is generally used to transmit light from the light emitting unit to the object-side space, and the light transmitted to the object-side space can be divided into projection light for forming a projection image or detection light for detecting target information, etc., according to the function of the light.

[0115] It is understood that when the optical lens provided in this application is used as a light-receiving lens such as a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the image side (such as the side where a photoelectric sensor or retina is located). That is, light from the object side can, for example, form an image on the image side. A camera lens may be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, etc. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the light source side.

[0116] In some possible implementations, the optical lens provided in this application can also simultaneously perform both light receiving and light transmitting functions. For example, the optical lens provided in this application is used in a lidar system with shared light and light paths, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. As another example, the optical lens provided in this application is used in a system integrating optical communication and radar, where the optical lens simultaneously performs the functions of emitting modulated optical signals and receiving radar echo beams.

[0117] In an exemplary embodiment, the first lens may have a negative optical power to collect diverging light rays from a large field of view. Under the same field of view, this allows the subsequent optical system to have a larger light-receiving surface and a larger aperture, thereby obtaining a greater amount of light and increasing the brightness of the image plane. The first side surface of the first lens is convex, which facilitates the entry of light rays at large angles into the lens, thereby increasing the light transmission of the lens. In addition, the convex design not only increases the difficulty for water droplets and dust to remain on the first side surface of the first lens, but also disperses external impacts, reducing the risk of lens breakage. The second side surface of the first lens is concave, which not only facilitates the balancing of the optical path with the subsequent lens elements and reduces aberrations, but also adjusts the flatness of the image field, ensuring that the edges and center of the image remain sharp simultaneously. The diverging effect of the concave surface on light rays also helps to reduce the optical path length, making the lens more compact.

[0118] In an exemplary embodiment, the second lens may have a negative optical power. The negative optical power design of the second lens, combined with the positive optical power design of the third lens, helps reduce aberrations and improve system resolution. The first side surface of the second lens is concave, which facilitates light divergence, thereby correcting the optical path of the optical system. Furthermore, the concave design also helps reduce the center thickness of the second lens, thus reducing lens weight. In addition, the second side surface of the second lens is convex, which not only facilitates rapid light divergence, separating central and peripheral rays in each field of view, increasing the aperture and system illumination, but also facilitates aberration correction, achieving high resolution.

[0119] In an exemplary embodiment, the second lens may have a negative optical power. The negative optical power design of the second lens, combined with the positive optical power design of the third lens, helps reduce aberrations and improve system resolution. The first side of the second lens is concave, which facilitates light divergence, thereby correcting the optical path of the optical system. The second side of the second lens is convex, which helps avoid the risk of ghosting between the second and third lenses and makes the design and assembly of the second lens more convenient. Furthermore, the concave design of the first side of the second lens combined with the convex design of the second side also helps to lower the light beam height, reducing the front aperture and enabling miniaturization.

[0120] In an exemplary embodiment, the third lens may have positive optical power to converge the front group of light rays and compress the light path, thereby reducing the overall size of the lens. The first and second lenses, which have negative optical power, can compensate for the positive optical power of the third lens, thus greatly reducing system aberrations at the third lens. The first side of the third lens is convex, which can converge the diverging light rays emitted from the second side of the second lens, balancing the resolving power at the edge and center of the image. In addition, the curvature effect of the convex design also reduces the focal length of the third lens, making the entire system more compact. The second side of the third lens is also convex, which allows light rays to be further converged before exiting from the second side of the third lens, which helps to reduce the diameter of the rear group of lenses, thereby achieving lens miniaturization and reducing lens manufacturing costs.

[0121] In an exemplary embodiment, the third lens may have positive optical power to converge the front group of light rays and compress the light path, thereby reducing the overall size of the lens. The first and second lenses, which have negative optical power, can compensate for the third lens, which has positive optical power, thus greatly reducing system aberrations at the third lens. The first side of the third lens is convex, which can converge the diverging light rays emitted from the second side of the second lens, balancing the resolving power at the edge and center of the image. In addition, the curvature effect of the convex design also reduces the focal length of the third lens, making the entire system more compact. The second side of the third lens is concave, which not only diverges the light rays, allowing them to reach a higher imaging position and achieve large target area imaging, but also increases the amount of light entering the rear lens, improving the brightness of the image plane.

[0122] In an exemplary embodiment, the third lens may have positive optical power to converge the front group of light rays and compress the light path, thereby reducing the overall size of the lens. The first and second lenses, which have negative optical power, can compensate for the positive optical power of the third lens, thus greatly reducing system aberrations at the third lens. The first side of the third lens is set as a concave surface, which allows for a smoother transition of light rays emitted from the second side of the second lens, thereby reducing sensitivity. In addition, this concave design can collect as much light as possible, achieving high light transmission. The second side of the third lens is set as a convex surface, which can compress light rays and contribute to miniaturization of the rear end of the lens.

[0123] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may be made of a low-refractive-index material to achieve a high dispersion coefficient and a high thermal defocus coefficient, thereby reducing chromatic aberration and defocusing effects caused by high and low temperatures. The first side surface of the fourth lens is convex, which can suppress the leading light rays, resulting in relatively flat light and improved system sensitivity. The second side surface of the fourth lens is also convex, which can further alter the light path and suppress the height of subsequent light rays, thereby reducing the rear aperture of the lens and contributing to miniaturization.

[0124] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may be made of a low-refractive-index material to achieve a high dispersion coefficient and a high thermal defocus coefficient, thereby reducing chromatic aberration and defocusing effects caused by high and low temperatures. The first side of the fourth lens is convex, which can suppress the front group of light rays, thus making the light relatively smooth and improving system sensitivity. The second side of the fourth lens is concave, which can balance the optical path difference between the center and edge positions, raising the light trajectory so that the light can reach a higher position, thus facilitating use with large-size chips.

[0125] In an exemplary embodiment, the fourth lens may have positive optical power. The fourth lens may be made of a low-refractive-index material to achieve a high dispersion coefficient and a high thermal defocus coefficient, thereby reducing chromatic aberration and defocusing effects caused by high and low temperatures. The first side surface of the fourth lens is concave, and the second side surface is convex. Combined with the third lens having a convex first side surface and a concave second side surface, this creates a symmetrical structure between the first and second sides of the fourth and third lenses. This perfectly symmetrical structure facilitates the balance of optical aberration and significantly reduces system sensitivity.

[0126] In an exemplary embodiment, the fifth and sixth lenses are cemented together to form a cemented lens, with the optical power of the fifth and sixth lenses having opposite positive and negative properties. This arrangement allows light to smoothly transition to the rear lens elements. The cementing of the fifth and sixth lenses not only reduces the air gap between them, thus reducing the overall length of the lens, but also reduces the number of assembly components between the fifth and sixth lenses, thereby reducing assembly steps and lowering lens costs. Furthermore, the dispersion of the fifth and sixth lenses is complementary, reducing chromatic aberration and improving image quality. Further, the fifth and sixth lenses can also reduce field curvature and correct off-axis point aberrations. The fifth and sixth lenses can also rationally allocate focal lengths, contributing to thermal compensation and achieving good temperature performance.

[0127] In an exemplary embodiment, the fifth lens and the sixth lens are cemented together to form a cemented lens. The fifth lens has a positive optical power, and the sixth lens has a negative optical power, which can better correct chromatic aberration, spherical aberration, and field curvature. The first side surface of the fifth lens is convex, which can effectively concentrate light rays, reduce the height of subsequent light rays, and thus reduce the rear aperture, which is beneficial for miniaturization. The second side surface of the fifth lens is also convex, which can further change the light trajectory, reduce the height of subsequent light rays, and further reduce the rear aperture and achieve miniaturization.

[0128] In an exemplary embodiment, the fifth lens and the sixth lens are cemented together to form a cemented lens. The fifth lens has a positive optical power, and the sixth lens has a negative optical power, which can better correct chromatic aberration, spherical aberration, and field curvature. The first side of the fifth lens is set as a concave surface, which can reduce the light receiving aperture and diverge the light to the rear system, allowing peripheral light to reach a higher imaging position. The second side of the fifth lens is set as a convex surface, which can converge the light, thereby reducing the light height and reducing the rear aperture, which helps to achieve miniaturization.

[0129] In an exemplary embodiment, the fifth lens has a negative optical power, and both its first and second sides are concave. When this aperture stop is positioned between the fourth and fifth lenses, the light from the aperture stop can enter the rear lens group to the maximum extent possible, increasing illumination, while also reducing the rear aperture.

[0130] In an exemplary embodiment, the fifth lens has a negative optical power. The first side surface of the fifth lens is concave, and the second side surface is convex. This causes the light rays emitted from the fifth lens and received by the sixth lens to have an upward trend, which helps to expand the imaging range.

[0131] In an exemplary embodiment, the fifth lens has a negative optical power. The first side of the fifth lens is convex, which reduces system sensitivity, improves resolution, and allows for a smaller aperture in the rear system, facilitating miniaturization of the back-end. The second side of the fifth lens is concave, which diverges the light rays that converge and then exit, balancing the optical path difference between the center and peripheral positions, raising the light trajectory, and enabling the light to reach a higher imaging position, thus facilitating its use with larger chips.

[0132] In an exemplary embodiment, the sixth lens has a negative optical power, and both its first and second sides are concave. Thus, when the fifth lens has a positive optical power and both its first and second sides are convex, the cemented joint not only makes the lens structure more compact and reduces its overall length, but also corrects various aberrations and chromatic aberrations, improving the system's resolving power. Furthermore, the sixth lens's own biconcave structure allows it to diverge light and raise its height, enlarging the image plane and balancing aberrations, thereby improving resolution.

[0133] In an exemplary embodiment, the sixth lens has a negative optical power, a concave first side surface, and a convex second side surface. Thus, when the fifth lens has a positive optical power and a convex first side surface, combined with the cementing feature, not only can the lens structure be made more compact and the overall length reduced, but it can also correct various aberrations and chromatic aberrations of the system, improving the system's resolving power. The concave first side surface of the sixth lens can diverge light, raise the light beam height, enlarge the image plane, and balance aberrations, thereby improving resolving power. The convex second side surface of the sixth lens can converge light, allowing it to smoothly enter the rear system, reducing the overall system sensitivity and improving resolving power.

[0134] In an exemplary embodiment, the sixth lens has positive optical power, and both its first and second sides are convex. This effectively converges the forward light rays, allowing diverging light rays to smoothly enter the rear optical system, thus reducing the rear port diameter. The convexity of the first side of the sixth lens effectively concentrates the light rays, lowering the height of subsequent light rays and further reducing the rear port diameter, facilitating miniaturization. The convexity of the second side of the sixth lens further alters the light trajectory, lowering the height of subsequent light rays and further reducing the rear port diameter, contributing to miniaturization.

[0135] In an exemplary embodiment, the sixth lens has positive optical power. This allows the sixth lens to converge the light rays emitted from the front, ensuring they smoothly enter the rear optical system and reducing the rear aperture. The first side of the sixth lens is concave, which reduces the aperture of the light receiving lens, causing the light to diverge into the rear system and thus allowing peripheral light to reach a higher imaging position. The second side of the sixth lens is convex, which converges the light rays, lowers their height, and further reduces the rear aperture, contributing to miniaturization.

[0136] In an exemplary embodiment, the sixth lens has positive optical power. This sixth lens can converge the light rays emitted from the front, lower the light trajectory, and allow them to smoothly enter the rear optical system, reducing the rear aperture and facilitating rear-end miniaturization. The first side of the sixth lens is set as a convex surface, which can smoothly transition the light to the rear system, reduce the system's sensitivity, improve resolution, and reduce the aperture of the rear system, thus facilitating rear-end miniaturization. The second side of the sixth lens is set as a concave surface, which can diverge the light rays emitted from the front, balancing the optical path difference between the center and edge positions, while also raising the light trajectory so that the light reaches a higher imaging position, thus enabling its use with large-size chips.

[0137] In an exemplary embodiment, the seventh lens has positive optical power. Thus, when the first and / or second side surfaces of the seventh lens are aspherical, not only can aberrations be balanced and resolving power improved, but the edge field-of-view ray trajectory can also be reduced, helping to decrease CRA (Cryptographic Argument). Setting the first side surface of the seventh lens to be convex not only facilitates molding during manufacturing but also significantly improves resolving power at the center. Setting the second side surface of the seventh lens to be convex helps reduce ghosting energy levels at the edges, thus mitigating ghosting.

[0138] In an exemplary embodiment, the seventh lens has positive optical power. Thus, when the first and / or second side surfaces of the seventh lens are aspherical, not only can aberrations be balanced and resolving power improved, but the edge field-of-view ray trajectory can also be reduced, helping to decrease CRA (Cryptographic Argument). Setting the first side surface of the seventh lens as concave is beneficial for achieving a telephoto lens and expanding the image plane, while also balancing aberrations and improving resolving power. Setting the second side surface of the seventh lens as convex is beneficial for reducing the ghosting energy level at the edges, thus mitigating ghosting.

[0139] In an exemplary embodiment, the seventh lens has positive optical power. Thus, when the first and / or second side surfaces of the seventh lens are aspherical, not only can aberrations be balanced and resolving power improved, but the ray path at the edges of the field of view can also be reduced, helping to decrease CRA (Corrected Aberration Reduction). The first side surface of the seventh lens is convex, which effectively corrects optical path differences across fields of view and balances aberrations, while also reducing the ray path at the edges of the field of view, thus helping to reduce CRA. The second side surface of the seventh lens is concave, which diverges light rays, thereby expanding the image plane, while also balancing aberrations and improving resolving power.

[0140] In an exemplary embodiment, the optical lens may further include an aperture stop, which may be disposed, for example, between the fourth and fifth lenses. By placing an aperture stop between the fourth and fifth lenses, it facilitates a smoother transition of light to the rear of the system, reduces the aperture of the rear lens, and lowers the sensitivity of the optical lens during assembly. It should be understood that the placement of the aperture stop between the fourth and fifth lenses is merely exemplary, and this application does not impose specific limitations on it; the aperture stop may be placed in other positions as needed.

[0141] In an exemplary embodiment, the first side surface and the second side surface of the seventh lens each have at least one inflection point. This arrangement helps to balance aberrations and improve resolution.

[0142] In an exemplary embodiment, the surface of the seventh lens may have one or more aspherical surfaces, which can help correct field curvature and improve resolution.

[0143] In an exemplary embodiment, the optical lens may further include a filter located between the seventh lens and the image plane to filter light of different wavelengths. The optical lens may also, as needed, provide a protective glass between the filter and the image plane to prevent damage to internal components (e.g., chips) of the optical lens.

[0144] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0145] In an exemplary embodiment, the optical back focal length (BFL) and the focal length (F) of the optical lens satisfy the following conditions: 0.95 ≤ BFL / F ≤ 2.22. Preferably, 1.11 ≤ BFL / F ≤ 1.94. Further, 1.113 ≤ BFL / F ≤ 1.932. This design allows for a longer back focal length, thereby providing more assembly space while achieving miniaturization, facilitating adjustment and assembly by module manufacturers.

[0146] In an exemplary embodiment, the optical back focal length (BFL) and total optical length (TTL) of the optical lens satisfy the following conditions: 0.14 ≤ BFL / TTL ≤ 0.32. Preferably, 0.16 ≤ BFL / TTL ≤ 0.29. Further, 0.163 ≤ BFL / TTL ≤ 0.282. This not only ensures that the BFL meets the module assembly requirements but also reduces the TTL, making the entire optical system more compact and facilitating miniaturization.

[0147] In an exemplary embodiment, the second side sag height SAG14 of the seventh lens and the center thickness d13 of the seventh lens satisfy the following: 0.04 ≤ |SAG14 / d13| ≤ 0.48. Preferably, 0.04 ≤ |SAG14 / d13| ≤ 0.75. Further, 0.048 ≤ |SAG14 / d13| ≤ 0.414. This allows for a larger ratio between the second side sag height of the seventh lens and the center thickness of the seventh lens, which is beneficial for increasing the optical back focal length of the optical lens and provides space for module assembly, facilitating focusing by the module manufacturer.

[0148] In an exemplary embodiment, the center distance d2 between the first lens and the second lens and the focal length F of the optical lens satisfy: 0.7 ≤ d2 / F ≤ 1.24. Preferably, 0.81 ≤ d2 / F ≤ 1.08. Further, 0.818 ≤ d2 / F ≤ 1.076. This allows the gap between the first lens and the second lens to be controlled within a certain range, avoiding excessive light divergence, reducing the accumulation of aberrations (such as spherical aberration and coma), making the optical power distribution of the rear lens more reasonable, and reserving more design space for overall aberration correction.

[0149] In an exemplary embodiment, the center distance d2 between the first lens and the second lens and the total optical length TTL of the optical lens satisfy: 0.1 ≤ d2 / TTL ≤ 0.18. Preferably, 0.11 ≤ d2 / TTL ≤ 0.16. Further, 0.119 ≤ d2 / TTL ≤ 0.157. This allows for reasonable control of the gap between the first lens and the second lens, thereby reducing the sensitivity of the optical system to mechanical tolerances and improving stability and yield during mass production.

[0150] In an exemplary embodiment, the focal length F7 of the seventh lens and the focal length F of the optical lens satisfy: 2 ≤ F7 / F ≤ 10. Preferably, 2.83 ≤ F7 / F ≤ 7.67, or 4.5 ≤ F7 / F ≤ 7.8. Further, 2.837 ≤ F7 / F ≤ 7.669. Thus, the optical power of the seventh lens accounts for a relatively large proportion of the entire optical lens, and its ability to deflect light is weaker than other lenses, thereby leaving more correction space and reducing system sensitivity. Controlling F7 / F ≤ 10 can prevent the rear lens from reducing its control over light rays at the edge of the field of view, preventing aberrations sensitive to the rear lens such as field curvature, distortion, and chromatic aberration from causing a decrease in edge field of view resolution and image quality deterioration.

[0151] In an exemplary embodiment, the focal length F1 of the first lens and the focal length F of the optical lens satisfy: -2.75 ≤ F1 / F ≤ -1.35. Preferably, -2.39 ≤ F1 / F ≤ -1.58 or -2.1 ≤ F1 / F ≤ -1.5. Further, -2.39 ≤ F1 / F ≤ -1.592. This allows for a reasonable allocation of the lens focal length, which on the one hand facilitates the entry of light rays with a large field of view into the optical system, achieving large field-of-view imaging; on the other hand, it fixes the light ray trajectory at the edge of the field of view, reducing the aperture of the first lens and facilitating miniaturization.

[0152] In an exemplary embodiment, the maximum aperture D of the optical lens, the holographic height H of the optical lens, and the focal length F of the optical lens satisfy the following: 0.24 ≤ D / H / F ≤ 0.52. Preferably, 0.27 ≤ D / H / F ≤ 0.46. Further, 0.277 ≤ D / H / F ≤ 0.454. Thus, under the condition of a fixed focal length, the optical lens can be endowed with the characteristics of a large aperture and a small aperture.

[0153] In an exemplary embodiment, the radius of curvature R1 of the first side surface of the first lens and the total optical length TTL of the optical lens satisfy: 0.33 ≤ R1 / TTL ≤ 0.79. Preferably, 0.38 ≤ R1 / TTL ≤ 0.69. Further, 0.389 ≤ R1 / TTL ≤ 0.687. By controlling the ratio of R1 to TTL, the radius of curvature of the first side surface of the first lens can be made smaller. This allows for better collection of large-angle light from the object side with a smaller aperture, and also improves the situation of ghost image reflection, reduces ghost image energy, and achieves the goal of weak ghost image.

[0154] In an exemplary embodiment, the focal length F, the maximum field of view radian value θ, and the maximum aperture D of the optical lens satisfy the condition: 0.41 ≤ (F × θ) / D ≤ 0.91. Controlling the ratio of the focal length, maximum field of view, and maximum aperture of the optical lens to satisfy this condition allows for a smaller front aperture of the lens, reducing the size of the imaging system. Preferably, 0.47 ≤ (F × θ) / D ≤ 0.79. Further, 0.478 ≤ (F × θ) / D ≤ 0.787, which further facilitates a reduction in the front aperture of the lens and the size of the imaging system.

[0155] In an exemplary embodiment, the center distance d4 between the second and third lenses, the radius of curvature R4 of the second side surface of the second lens, and the radius of curvature R5 of the first side surface of the third lens satisfy: 0.08 ≤ |(d4-R4) / R5| ≤ 0.78. Preferably, 0.09 ≤ |(d4-R4) / R5| ≤ 0.69. Further, 0.095 ≤ |(d4-R4) / R5| ≤ 0.682. This effectively changes the relevant reflection path and the convergence point of light rays on the image plane, reducing the ghost image energy level.

[0156] In an exemplary embodiment, the total optical length (TTL) and the maximum aperture (D) of the optical lens satisfy the following ratio: 1.38 ≤ TTL / D ≤ ​​3.07. Preferably, 1.62 ≤ TTL / D ≤ ​​2.67. Further, 1.622 ≤ TTL / D ≤ ​​2.667. This allows for a smaller ratio between the total optical length and the maximum lens aperture, making the entire optical system more compact and facilitating miniaturization.

[0157] In an exemplary embodiment, the focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy: -1.47 ≤ F5 / F6 ≤ -0.63. Preferably, -1.4 ≤ F5 / F6 ≤ -0.73. Further, -1.274 ≤ F5 / F6 ≤ -0.739. This allows F5 / F6 to be controlled within a certain range, thereby reducing axial chromatic aberration and achieving an achromatic design.

[0158] In an exemplary embodiment, the radius of curvature R2 of the second side surface of the first lens and the radius of curvature R3 of the first side surface of the second lens satisfy: -0.77 ≤ R2 / R3 ≤ -0.29. Preferably, -0.68 ≤ R2 / R3 ≤ -0.34. Further, -0.67 ≤ R2 / R3 ≤ -0.34. This avoids excessive concentration of optical power in one lens. The first and second lenses work together to stably achieve a divergence effect, meeting the system's requirements for light divergence.

[0159] In an exemplary embodiment, the second side elevation SAG2 of the first lens, the aperture D2 corresponding to the maximum field of view of the optical lens, the first side elevation SAG3 of the second lens, and the aperture D3 corresponding to the maximum field of view of the optical lens satisfy the following: -5.2 ≤ (SAG2 / D2) / (SAG3 / D3) ≤ -1.66. Preferably, -4.6 ≤ (SAG2 / D2) / (SAG3 / D3) ≤ -1.9. Further, -4.521 ≤ (SAG2 / D2) / (SAG3 / D3) ≤ -1.959. Thus, after light exits from the first lens, it can enter the second lens at a smaller incident angle, thereby reducing off-axis aberrations such as coma and astigmatism.

[0160] In an exemplary embodiment, the center thicknesses d1 of the first lens, d3 of the second lens, d5 of the third lens, d7 of the fourth lens, d10 of the fifth lens, d11 of the sixth lens, and d13 of the seventh lens satisfy the following: 0.41 ≤ (d1 + d3 + d5 + d7 + d10 + d11 + d13) / TTL ≤ 0.69. Preferably, 0.48 ≤ (d1 + d3 + d5 + d7 + d10 + d11 + d13) / TTL ≤ 0.61. Further, 0.486 ≤ (d1 + d3 + d5 + d7 + d10 + d11 + d13) / TTL ≤ 0.603. This allows the center thicknesses of the first to seventh lenses to be controlled within a reasonable range, which is beneficial for providing more flexible curvature combinations to adjust the light refraction path, reducing aberration accumulation, and making the image clearer and more uniform.

[0161] In an exemplary embodiment, the optical power φ1 of the first lens, the optical power φ2 of the second lens, and the optical power φ of the optical lens satisfy the following: 0.69 ≤ (|φ1| + |φ2|) / |φ| ≤ 1.22. Preferably, 0.81 ≤ (|φ1| + |φ2|) / |φ| ≤ 1.07. Further, 0.817 ≤ (|φ1| + |φ2|) / |φ| ≤ 1.061. Thus, the first and second lenses can dominate the optical power, reducing the number of subsequent lenses or the required optical power, which helps to shorten the total optical length (TTL) and makes the lens structure more compact.

[0162] In an exemplary embodiment, the second side elevation SAG14 of the seventh lens and the aperture D14 corresponding to the maximum field of view of the optical lens satisfy the following: -0.19 ≤ SAG14 / D14 ≤ -0.01. Preferably, -0.17 ≤ SAG14 / D14 ≤ -0.01. Further, -0.167 ≤ SAG14 / D14 ≤ -0.015. By limiting the conditional expression within this range and in conjunction with the aspherical design of the seventh lens, the surface parameters can be precisely constrained, enhancing the aberration correction capability (such as spherical aberration and coma) and optimizing the light propagation path and image plane energy distribution.

[0163] In an exemplary embodiment, the center distance d4 between the second and third lenses and the total optical length TTL of the optical lens satisfy the following condition: 0.002 ≤ d4 / TTL ≤ 0.098. Preferably, 0.003 ≤ d4 / TTL ≤ 0.085. Further, 0.003 ≤ d4 / TTL ≤ 0.084. This allows the gap between the second and third lenses to be controlled within a reasonable range, enabling light of various wavelengths to converge better onto the imaging focal plane, reducing aberrations caused by light dispersion, and improving image sharpness and color reproduction.

[0164] In an exemplary embodiment, the focal length F2 of the second lens and the focal length F of the optical lens satisfy: -6.2 ≤ F2 / F ≤ -1.3. Preferably, -6.02 ≤ F2 / F ≤ -1.5. Further, -5.232 ≤ F2 / F ≤ -1.765. This constrains the relationship between the focal lengths of the second lens and the optical lens, achieving a reasonable allocation of optical power, effective correction of aberrations, and optimization of system performance.

[0165] In an exemplary embodiment, the radius of curvature R7 of the first side of the fourth lens, the center thickness d7 of the fourth lens, and the radius of curvature R8 of the second side of the fourth lens satisfy: -4.67 ≤ R7 / (d7+R8) ≤ 10.44. Preferably, -4.07 ≤ R7 / (d7+R8) ≤ 9.09. Further, -4.063 ≤ R7 / (d7+R8) ≤ 9.079. This allows the radius of curvature of the first side of the fourth lens, the radius of curvature of the second side of the fourth lens, and the center thickness of the fourth lens to be controlled within a reasonable range, ensuring that the fourth lens can work in conjunction with the front and rear lenses, optimize the light propagation path, and enable the light rays from each field of view to converge more accurately on the imaging focal plane, thereby improving the overall optical performance.

[0166] In an exemplary embodiment, the center distance d6 between the third and fourth lenses and the center thickness d7 of the fourth lens satisfy the following condition: 0.01 ≤ d6 / d7 ≤ 0.39. Preferably, 0.015 ≤ d6 / d7 ≤ 0.35. Further, 0.018 ≤ d6 / d7 ≤ 0.341. This ensures that d6 and d7 can complement each other, preventing d6 from being too small relative to d7, which would lead to a deterioration in optical performance (such as aberration correction), and preventing d6 from being too large relative to d7, which would compromise the system's compactness. By rationally planning the center distance between the third and fourth lenses and the center thickness of the fourth lens, the propagation path of light between the third and fourth lenses can be optimized within a miniaturized framework to achieve functions such as aberration correction, avoiding sacrificing optical performance simply for the sake of small size.

[0167] In an exemplary embodiment, the center distance d6 between the third and fourth lenses and the focal length F of the optical lens satisfy: 0.02 ≤ d6 / F ≤ 0.43. Preferably, 0.02 ≤ d6 / F ≤ 0.38. Further, 0.021 ≤ d6 / F ≤ 0.372. This ensures that the propagation path of light between the third and fourth lenses is neither too tight nor too loose, providing suitable space for aberration correction. Within the range of d6 defined by the relationship 0.02 ≤ d6 / F ≤ 0.43, light rays, after being refracted by the third lens, can enter the fourth lens at an appropriate angle, facilitating comprehensive correction of aberrations such as spherical aberration, coma, and astigmatism. This allows light rays from different fields of view to converge more uniformly on the imaging focal plane, improving image sharpness and quality.

[0168] In an exemplary embodiment, the second side angle of the seventh lens, arctan(1 / K(S14)), satisfies: 7 ≤ |arctan(1 / K(S14))| ≤ 54. Preferably, 8 ≤ |arctan(1 / K(S14))| ≤ 47. Further, 8.54 ≤ |arctan(1 / K(S14))| ≤ 46.356. This constrains the incident angle of light at the second side of the seventh lens, achieving a balance between aberration correction capability, edge field-of-view light controllability, lens manufacturing feasibility, and system-level aberration coordination. By constraining the above relationship, the second side angle of the seventh lens can be kept within a reasonable range, avoiding both insufficient correction capability due to an excessively small angle and aberration deterioration and increased processing risk due to an excessively large angle. Furthermore, by constraining the second side angle of the seventh lens, effective propagation of edge field-of-view light can be ensured, improving the imaging uniformity, reliability, and engineering practicality of the optical system.

[0169] In an exemplary embodiment, the focal length F4 of the fourth lens and the focal length F of the optical lens satisfy: 1.88 ≤ F4 / F ≤ 4.96. Preferably, 2.21 ≤ F4 / F ≤ 4.32. Further, 2.218 ≤ F4 / F ≤ 4.311. Thus, the focal length of the fourth lens maintains a reasonable proportion within the focal length of the optical lens, allowing the fourth lens to play a stable and appropriate role in aberration correction. It avoids excessively altering the light path due to an excessively small F4, leading to an imbalance in aberration correction, and also avoids having a weak effect in aberration correction due to an excessively large F4.

[0170] In an exemplary embodiment, the focal length F3 of the third lens and the focal length F of the optical lens satisfy: 1.63 ≤ F3 / F ≤ 5.55. Preferably, 1.93 ≤ F3 / F ≤ 4.82. Further, 1.931 ≤ F3 / F ≤ 4.819. Thus, the focal length of the third lens maintains a reasonable proportion within the focal length of the optical lens, allowing the third lens to play a stable and appropriate role in aberration correction. It avoids excessively altering the light path due to an excessively small F3, leading to an imbalance in aberration correction, and also avoids having a weak effect in aberration correction due to an excessively large F3.

[0171] In an exemplary embodiment, the center distance d12 between the sixth and seventh lenses and the total optical length TTL of the optical lens satisfy: 0.05 ≤ d12 / TTL ≤ 0.11. Further, 0.007 ≤ d12 / TTL ≤ 0.096. The rear lens group (especially the last two lenses) typically plays a crucial role in correcting residual aberrations. If d12 is too small, the sixth and seventh lenses will be too close together, potentially leading to an excessively large angle of light refraction, exacerbating spherical aberration or coma. If d12 is too large, the propagation path of light between the sixth and seventh lenses will be too long, potentially introducing additional aberrations (such as field curvature or distortion), resulting in degraded optical performance.

[0172] In an exemplary embodiment, the center distance d2 between the first and second lenses and the focal length F1 of the first lens satisfy: 0.25 ≤ |d2 / F1| ≤ 0.82. Further, 0.346 ≤ |d2 / F1| ≤ 0.641. This ensures that the front group of the lens has sufficient divergence capability, allowing light to enter the subsequent lens group at a larger angle, laying the foundation for a long back focal length. Negative power lenses produce positive spherical aberration (edge ​​rays diverge more than paraxial rays). By limiting the distance between the first and second lenses with negative power within a reasonable range, light rays at the edge of the first lens can enter the second lens at a larger angle. The second lens partially cancels out the positive spherical aberration of the first lens through a larger incident height, thereby reducing the overall spherical aberration of the front group.

[0173] In an exemplary embodiment, the center distance d6 between the third and fourth lenses, the focal length F3 of the third lens, and the focal length F4 of the fourth lens satisfy: 0 < d6 / (F3+F4) ≤ 0.1. Preferably, 0.002 ≤ d6 / (F3+F4) ≤ 0.08. Further, 0.003 ≤ d6 / (F3+F4) ≤ 0.071. This appropriately increases the center distance between the third and fourth lenses to adjust the incident height of light on the fourth lens. Combined with lenses having negative optical power (such as a second lens and a fifth lens with negative optical power), it can balance off-axis coma and field curvature, improving the imaging quality of the edge field of view.

[0174] In an exemplary embodiment, the Abbe number Vd2 of the second lens and the Abbe number Vd1 of the first lens satisfy: Vd2 > 1.8Vd1. The first two lenses (the first and second lenses) are both negative power lenses, which enhances the system's initial light divergence capability. The significantly higher Abbe number of the second lens compared to the first lens eliminates the chromatic aberration generated by the first lens, providing a low-dispersion substrate for subsequent positive lens groups (such as the third and fourth lenses), facilitating compensation for residual chromatic aberration.

[0175] In an exemplary embodiment, the focal length F7 of the seventh lens and the optical back focal length BFL of the optical lens satisfy the following condition: 0.17 ≤ BFL / F7 ≤ 0.67. This achieves a balance between aberration correction and structural compatibility. By controlling BFL / F7 within this range, the refractive power of the seventh lens can be weakened, coma can be reduced, and light can reach the imaging plane more smoothly, thereby reducing distortion and improving image quality.

[0176] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the seven lenses mentioned above. By rationally allocating the optical parameters of each lens, the optical lens achieves small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, long back focal length, low distortion, small principal angle, high illumination, and good manufacturability. It can also be well-matched to, for example, automotive chips without producing vignetting. This optical lens exhibits excellent temperature performance, with minimal changes in imaging effect at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of, for example, automotive applications.

[0177] Those skilled in the art should understand that the total optical length (TTL) of the optical lens used above refers to the axial distance from the first side surface of the first lens to the imaging plane or image source plane; the back focal length (BFL) of the optical lens refers to the axial distance from the second side surface of the seventh lens to the imaging plane or image source plane; and D is the aperture corresponding to the maximum field of view of the optical lens.

[0178] However, those skilled in the art will understand that the number of lenses constituting the optical lens can be varied to obtain the various results and advantages described herein without departing from the technical solutions claimed in this application. For example, although seven lenses are described as an example in the embodiment, the optical lens is not limited to including seven lenses. If desired, the optical lens may also include other numbers of lenses.

[0179] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. The units for radius of curvature and thickness / distance are all mm.

[0180] Example 1

[0181] The following is for reference Figure 1 The optical lens according to Embodiment 1 of this application is described.

[0182] like Figure 1 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0183] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0184] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0185] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0186] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0187] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0188] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0189] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0190] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0191] Table 1 shows the basic parameters of the optical lens of Example 1.

[0192] Table 1

[0193] S1 16.723 1.2 1.83 42.73 S2 4.836 4.918 S3 -9.681 0.7 1.50 81.61 S4 10.737 1.559 S5 16.139 3.795 1.90 31.31 S6 -37.649 0.806 S7 9.892 4.971 1.57 71.30 S8 -17.147 0.1 ST0 Infinitv 0.1 S10 9.569 2.076 1.59 68.34 S11 -7.687 0.7 1.85 23.78 S12 36.99 3.079 S13 15.421 2.618 1.59 61.15 S14 -111.765 0.228 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.002 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0194] In Embodiment 1, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces, and the surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical surface formula:

[0195]

[0196] Where x is the distance vector from the vertex of the aspherical surface at a height of h along the optical axis; c is the paraxial curvature of the aspherical surface, c = 1 / R (i.e., the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; Ai is the i-th order correction coefficient of the aspherical surface. Table 2 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for the aspherical surfaces S13 and S14 in Example 1.

[0197] Table 2

[0198]

[0199] from Figure 2 As can be seen, the optical lens given in Example 1 has good imaging quality.

[0200] Example 2

[0201] The following is for reference Figure 3 Describes an optical lens according to Embodiment 2 of this application.

[0202] like Figure 3As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0203] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0204] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0205] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0206] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0207] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0208] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0209] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0210] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0211] Table 3 shows the basic parameters of the optical lens in Example 2.

[0212] Table 3

[0213] S1 16.722 1.2 1.83 42.73 S2 4.836 4.918 S3 -9.683 0.7 1.50 81.61 S4 10.733 1.56 S5 16.137 3.795 1.90 31.31 S6 -37.645 0.804 S7 9.893 4.971 1.57 71.30 S8 -17.137 0.1 STO Infinity 0.1 S10 9.573 2.076 1.59 68.34 S11 -7.684 0.7 1.85 23.78 S12 37.02 3.08 S13 15.423 2.618 1.59 61.15 S14 -111.153 0.228 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.002 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0214] In Embodiment 2, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 4 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Embodiment 2.

[0215] Table 4

[0216]

[0217] from Figure 4 As can be seen, the optical lens given in Example 2 has better imaging quality.

[0218] Example 3

[0219] The following is for reference Figure 5 The optical lens according to Embodiment 3 of this application is described.

[0220] like Figure 5 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0221] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0222] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is convex.

[0223] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0224] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0225] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0226] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0227] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0228] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0229] Table 5 shows the basic parameters of the optical lens of Example 3.

[0230] Table 5

[0231] S1 22 1.2 1.83 42.73 S2 4.763 4.799 S3 -7.814 3.119 1.50 81.61 S4 -30 0.23 S5 93.68 4.333 1.90 31.31 S6 -22.775 0.1 S7 8.251 5.056 1.57 71.30 S8 -32.002 0.1 ST0 Infinitv 0.643 S10 7.945 2.09 1.59 68.34 S11 -8.989 0.7 1.85 23.78 S12 15.344 1.703 S13 20.838 2.459 1.59 61.15 S14 -42.728 0.319 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0232] In Example 3, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 6 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 3.

[0233] Table 6

[0234]

[0235] from Figure 6 As can be seen, the optical lens given in Example 3 has good imaging quality.

[0236] Example 4

[0237] The following is for reference Figure 7 The optical lens according to Embodiment 4 of this application is described.

[0238] like Figure 7 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0239] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0240] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is convex.

[0241] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0242] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0243] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0244] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0245] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0246] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0247] Table 7 shows the basic parameters of the optical lens in Example 4.

[0248] Table 7

[0249] S1 22 1.2 1.83 42.73 S2 4.769 4.745 S3 -8.271 4.453 1.50 81.61 S4 -30 0.097 S5 47.537 3.35 1.90 31.31 S6 -35.006 0.1 S7 7.992 5.062 1.57 71.30 S8 -40.009 0.1 ST0 Infinity 0.747 S10 7.553 2.155 1.59 68.34 S11 -8.41 0.7 1.85 23.78 S12 16.405 1.395 S13 23.68 2.37 1.59 61.15 S14 -51.55 0.377 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.003 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0250] In Example 4, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 8 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 4.

[0251] Table 8

[0252]

[0253] from Figure 8 As can be seen, the optical lens given in Example 4 has good imaging quality.

[0254] Example 5

[0255] The following is for reference Figure 9 The optical lens according to Embodiment 5 of this application is described.

[0256] like Figure 9 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0257] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0258] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0259] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is concave.

[0260] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0261] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0262] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0263] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0264] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0265] Table 9 shows the basic parameters of the optical lens of Example 5.

[0266] Table 9

[0267] S1 12.578 1.2 1.83 42.73 S2 4.675 4.99 S3 -11.083 0.7 1.50 81.61 S4 8.017 1.863 S5 12.052 3.454 1.90 31.31 S6 50 0.1 S7 11.564 4.756 1.57 71.30 S8 -15.384 0.1 ST0 Infinity 0.1 S10 7.93 3.863 1.59 68.34 S11 -6.464 0.7 1.85 23.78 S12 -393.367 2.16 S13 15.362 2.485 1.59 61.15 S14 -342.827 0.38 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.003 S17 Infinity 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0268] In Example 5, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 10 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 5.

[0269] Table 10

[0270]

[0271] from Figure 10 As can be seen, the optical lens given in Example 5 has good imaging quality.

[0272] Example 6

[0273] The following is for reference Figure 11 The optical lens according to Embodiment 6 of this application is described.

[0274] like Figure 11 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0275] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0276] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0277] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is concave.

[0278] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0279] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0280] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0281] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0282] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0283] Table 11 shows the basic parameters of the optical lens of Example 6.

[0284] Table 11

[0285] S1 12.437 1.2 1.83 42.73 S2 4.687 5.013 S3 -10.831 0.7 1.50 81.61 S4 7.702 1.776 S5 12.133 3.437 1.90 31.31 S6 50 0.1 S7 11.397 4.805 1.57 71.30 S8 -14.435 0.1 STO Infinity 0.1 S10 7.958 3.927 1.59 68.34 S11 -6.399 0.7 1.85 23.78 S12 -173.54 2.199 S13 18.414 2.481 1.59 61.15 S14 -99.49 0.313 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.002 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0286] In Example 6, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 12 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 6.

[0287] Table 12

[0288]

[0289] from Figure 12 As can be seen, the optical lens given in Example 6 has good imaging quality.

[0290] Example 7

[0291] The following is for reference Figure 13 The optical lens according to Embodiment 7 of this application is described.

[0292] like Figure 13 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0293] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0294] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is convex.

[0295] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is concave, and the second side surface S6 of the third lens L3 is convex.

[0296] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0297] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0298] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0299] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0300] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0301] Table 13 shows the basic parameters of the optical lens of Example 7.

[0302] Table 13

[0303] S1 22 1.2 1.83 42.73 S2 4.804 4.854 S3 -7.172 0.7 1.50 81.61 S4 -32.443 0.604 S5 -50 5 1.90 31.31 S6 -14.286 0.1 S7 8.93 5.5 1.57 71.30 S8 -26.922 0.1 ST0 Infinitv 0.677 S10 8.1 2.496 1.59 68.34 S11 -9.392 0.7 1.85 23.78 S12 15.322 2.023 S13 15.789 2.668 1.59 61.15 S14 -29.216 0.229 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0304] In Example 7, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 14 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 7.

[0305] Table 14

[0306]

[0307] from Figure 14 As can be seen, the optical lens given in Example 7 has good imaging quality.

[0308] Example 8

[0309] The following is for reference Figure 15 The optical lens according to Embodiment 8 of this application is described.

[0310] like Figure 15 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0311] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0312] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is convex.

[0313] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is concave, and the second side surface S6 of the third lens L3 is convex.

[0314] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0315] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0316] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0317] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0318] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0319] Table 15 shows the basic parameters of the optical lens of Example 8.

[0320] Table 15

[0321] S1 22 1.2 1.83 42.73 S2 4.809 4.869 S3 -7.177 0.7 1.50 81.61 S4 -32.278 0.602 S5 -50 5 1.90 31.31 S6 -14.286 0.109 S7 8.917 5.5 1.57 71.30 S8 -27.135 0.1 ST0 Infinity 0.691 S10 8.065 2.46 1.59 68.34 S11 -9.464 0.7 1.85 23.78 S12 15.224 2.021 S13 15.759 2.662 1.59 61.15 S14 -29.784 0.236 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0322] In Example 8, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 16 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 8.

[0323] Table 16

[0324]

[0325] from Figure 16 As can be seen, the optical lens given in Example 8 has good imaging quality.

[0326] Example 9

[0327] The following is for reference Figure 17 The optical lens according to Embodiment 9 of this application is described.

[0328] like Figure 17 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0329] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0330] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0331] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0332] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is concave.

[0333] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0334] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0335] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0336] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0337] Table 17 shows the basic parameters of the optical lens of Example 9.

[0338] Table 17

[0339] S1 17.389 1.2 1.83 42.73 S2 4.888 4.857 S3 -10.015 0.7 1.50 81.61 S4 22.955 2.556 S5 56.001 3.375 1.90 31.31 S6 -28.482 0.205 S7 7.012 5.07 1.57 71.30 S8 50 0.202 ST0 Infinity 1.032 S10 6.659 2.363 1.59 68.34 S11 -7.044 0.7 1.85 23.78 S12 36.164 0.994 S13 54.769 2.401 1.59 61.15 S14 -21.527 0.71 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.488 S17 Infinity 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0340] In Example 9, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 18 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 9.

[0341] Table 18

[0342]

[0343] from Figure 18 As can be seen, the optical lens given in Example 9 has good imaging quality.

[0344] Example 10

[0345] The following is for reference Figure 19 The optical lens according to Embodiment 10 of this application is described.

[0346] like Figure 19 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0347] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0348] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0349] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0350] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is concave.

[0351] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0352] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0353] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0354] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0355] Table 19 shows the basic parameters of the optical lens of Example 10.

[0356] Table 19

[0357] S1 17.651 1.2 1.83 42.73 S2 4.9 4.892 S3 -9.695 0.7 1.50 81.61 S4 31.301 2.691 S5 79.619 3.363 1.90 31.31 S6 -26.051 0.1 S7 7.037 5.086 1.57 71.30 S8 50 0.202 STO Infinity 1.022 S10 6.636 2.368 1.59 68.34 S11 -7.142 0.7 1.85 23.78 S12 29.949 1.004 S13 48.307 2.407 1.59 61.15 S14 -21.695 0.67 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.448 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0358] In Example 10, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 204 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 10.

[0359] Table 20

[0360]

[0361] from Figure 20 As can be seen, the optical lens given in Example 10 has good imaging quality.

[0362] Example 11

[0363] The following is for reference Figure 21 The optical lens according to Embodiment 11 of this application is described.

[0364] like Figure 21 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0365] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0366] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0367] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is concave.

[0368] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is concave, and the second side surface S8 of the fourth lens L4 is convex.

[0369] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0370] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0371] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0372] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0373] Table 21 shows the basic parameters of the optical lens of Example 11.

[0374] Table 21

[0375] S1 13.019 1.2 1.83 42.73 S2 4.675 4.85 S3 -12.236 0.7 1.50 81.61 S4 7.717 0.983 S5 9.876 3.69 1.90 31.31 S6 186.585 0.288 S7 -50 4.108 1.57 71.30 S8 -9.621 0.1 ST0 Infinitv 0.1 S10 6.805 4.101 1.59 68.34 S11 -7.923 0.7 1.85 23.78 S12 36.336 2.894 S13 9.482 3.084 1.59 61.15 S14 -75.33 0.053 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0376] In Example 11, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 22 gives the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 11.

[0377] Table 22

[0378]

[0379] from Figure 22 As can be seen, the optical lens given in Example 11 has good imaging quality.

[0380] Example 12

[0381] The following is for reference Figure 23 The optical lens according to Embodiment 12 of this application is described.

[0382] like Figure 23 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0383] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0384] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0385] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is concave.

[0386] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is concave, and the second side surface S8 of the fourth lens L4 is convex.

[0387] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0388] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0389] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0390] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0391] Table 23 shows the basic parameters of the optical lens of Example 12.

[0392] Table 23

[0393] S1 13.021 1.2 1.83 42.73 S2 4.675 4.849 S3 -12.229 0.7 1.50 81.61 S4 7.712 0.981 S5 9.87 3.69 1.90 31.31 S6 186.019 0.288 S7 -50 4.108 1.57 71.30 S8 -9.615 0.1 STO Infinity 0.1 S10 6.804 4.101 1.59 68.34 S11 -7.923 0.7 1.85 23.78 S12 36.369 2.897 S13 9.489 3.085 1.59 61.15 S14 -74.887 0.051 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0394] In Example 12, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 24 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 12.

[0395] Table 24

[0396]

[0397] from Figure 24 As can be seen, the optical lens given in Example 12 has good imaging quality.

[0398] Example 13

[0399] The following is for reference Figure 25 The optical lens according to Embodiment 13 of this application is described.

[0400] like Figure 25 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0401] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0402] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0403] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0404] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0405] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is concave, and the second side surface S11 of the fifth lens L5 is convex.

[0406] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0407] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0408] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0409] Table 25 shows the basic parameters of the optical lens of Example 13.

[0410] Table 25

[0411] S1 14.855 1.2 1.83 42.73 S2 4.801 4.662 S3 -14.124 0.7 1.50 81.61 S4 8.293 1.653 S5 69.665 3.389 1.90 31.31 S6 -21.387 0.1 S7 7.563 5.213 1.57 71.30 S8 -20.176 0.1 ST0 Infinity 2.099 S10 -50 1.913 1.59 68.34 S11 -4.209 0.7 1.85 23.78 S12 -10.124 0.504 S13 14.261 2.489 1.59 61.15 S14 -234.058 1.363 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.767 S17 Infinity 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0412] In Example 13, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 26 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 13.

[0413] Table 26

[0414]

[0415] from Figure 26 As can be seen, the optical lens given in Example 13 has good imaging quality.

[0416] Example 14

[0417] The following is for reference Figure 27 The optical lens according to Embodiment 14 of this application is described.

[0418] like Figure 27 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0419] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0420] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0421] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0422] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0423] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is concave, and the second side surface S11 of the fifth lens L5 is convex.

[0424] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0425] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0426] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0427] Table 27 shows the basic parameters of the optical lens of Example 14.

[0428] Table 27

[0429] S1 14.84 1.2 1.83 42.73 S2 4.8 4.664 S3 -14.109 0.7 1.50 81.61 S4 8.299 1.653 S5 69.99 3.39 1.90 31.31 S6 -21.351 0.1 S7 7.564 5.214 1.57 71.30 S8 -20.134 0.1 ST0 Infinitv 2.095 S10 -50 1.913 1.59 68.34 S11 -4.211 0.7 1.85 23.78 S12 -10.135 0.512 S13 14.26 2.488 1.59 61.15 S14 -234.029 1.36 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.764 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0430] In Example 14, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 28 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 14.

[0431] Table 28

[0432]

[0433] from Figure 28 As can be seen, the optical lens given in Example 14 has good imaging quality.

[0434] Example 15

[0435] The following is for reference Figure 29 The optical lens according to Embodiment 15 of this application is described.

[0436] like Figure 29 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0437] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0438] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0439] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0440] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0441] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0442] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0443] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0444] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0445] Table 29 shows the basic parameters of the optical lens of Example 15.

[0446] Table 29

[0447] S1 15.065 1.2 1.83 42.73 S2 4.689 4.783 S3 -9.584 0.7 1.50 81.61 S4 9.406 1.555 S5 21.248 3.478 1.90 31.31 S6 -43.367 0.1 S7 9.133 5.064 1.57 71.30 S8 -17.43 0.1 STO Infinity 1.261 S10 9.595 2.472 1.59 68.34 S11 -6.177 0.7 1.85 23.78 S12 -50 2.809 S13 41.577 2.451 1.59 61.15 S14 -42.359 0.176 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0448] In Example 15, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 30 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 15.

[0449] Table 30

[0450]

[0451] from Figure 30 As can be seen, the optical lens given in Example 15 has good imaging quality.

[0452] Example 16

[0453] The following is for reference Figure 31 The optical lens according to Embodiment 16 of this application is described.

[0454] like Figure 31 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0455] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0456] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0457] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0458] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0459] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0460] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0461] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0462] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0463] Table 31 shows the basic parameters of the optical lens of Example 16.

[0464] Table 31

[0465] S1 14.797 1.2 1.83 42.73 S2 4.697 4.806 S3 -9.703 0.7 1.50 81.61 S4 9.123 1.588 S5 20.417 3.474 1.90 31.31 S6 -48.16 0.1 S7 9.131 5.07 1.57 71.30 S8 -17.178 0.1 ST0 Infinitv 1.134 S10 9.557 2.61 1.59 68.34 S11 -6.124 0.7 1.85 23.78 S12 -50 2.755 S13 43.671 2.454 1.59 61.15 S14 -40.582 0.16 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0466] In Example 16, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 32 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 16.

[0467] Table 32

[0468]

[0469] from Figure 32 As can be seen, the optical lens given in Example 16 has good imaging quality.

[0470] Example 17

[0471] The following is for reference Figure 33 The optical lens according to Embodiment 17 of this application is described.

[0472] like Figure 33 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0473] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0474] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0475] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0476] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is concave.

[0477] The fifth lens L5 has negative optical power. The first side surface S10 of the fifth lens L5 is concave, and the second side surface S11 of the fifth lens L5 is concave.

[0478] The sixth lens L6 has positive optical power. The first side surface S11 of the sixth lens L6 is convex, and the second side surface S12 of the sixth lens L6 is convex.

[0479] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0480] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0481] Table 33 shows the basic parameters of the optical lens of Example 17.

[0482] Table 33

[0483] S1 17.687 1.2 1.83 42.73 S2 4.913 3.863 S3 -12.603 0.7 1.50 81.61 S4 8.625 2.092 S5 12.99 4.061 1.90 31.31 S6 -18.772 0.1 S7 10.05 4.375 1.57 71.30 S8 263.708 0.114 ST0 Infinity 0.389 S10 -12.245 0.7 1.85 23.78 S11 7.416 2.172 1.59 68.34 S12 -7.434 0.262 S13 80.053 3.319 1.59 61.15 S14 -9.001 1.866 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 5.639 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0484] In Example 17, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 34 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 17.

[0485] Table 34

[0486]

[0487] from Figure 34 As can be seen, the optical lens given in Example 17 has good imaging quality.

[0488] Example 18

[0489] The following is for reference Figure 35The optical lens according to Embodiment 18 of this application is described.

[0490] like Figure 35 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0491] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0492] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0493] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0494] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is concave.

[0495] The fifth lens L5 has negative optical power. The first side surface S10 of the fifth lens L5 is concave, and the second side surface S11 of the fifth lens L5 is concave.

[0496] The sixth lens L6 has positive optical power. The first side surface S11 of the sixth lens L6 is convex, and the second side surface S12 of the sixth lens L6 is convex.

[0497] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0498] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0499] Table 35 shows the basic parameters of the optical lens of Example 18.

[0500] Table 35

[0501] S1 18.151 1.2 1.83 42.73 S2 4.962 3.821 S3 -13.109 0.7 1.50 81.61 S4 8.61 2.139 S5 12.907 4.067 1.90 31.31 S6 -19.085 0.1 S7 10.008 4.354 1.57 71.30 S8 94.194 0.138 STO Infinity 0.387 S10 -12.111 0.7 1.85 23.78 S11 7.378 2.16 1.59 68.34 S12 -7.518 0.244 S13 55.515 3.293 1.59 61.15 S14 -8.904 1.888 S15 Infinity 0.5 1.52 64.20 S16 Infinity 5.66 S17 Infinity 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0502] In Example 18, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 36 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 18.

[0503] Table 36

[0504]

[0505] from Figure 36 As can be seen, the optical lens given in Example 18 has good imaging quality.

[0506] Example 19

[0507] The following is for reference Figure 37 Describes an optical lens according to Embodiment 19 of this application.

[0508] like Figure 37 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0509] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0510] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0511] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0512] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0513] The fifth lens L5 has negative optical power. The first side surface S10 of the fifth lens L5 is concave, and the second side surface S11 of the fifth lens L5 is convex.

[0514] The sixth lens L6 has positive optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0515] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0516] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0517] Table 37 shows the basic parameters of the optical lens of Example 19.

[0518] Table 37

[0519] S1 13.876 1.2 1.83 42.73 S2 5.357 3.853 S3 -10.541 0.7 1.50 81.61 S4 6.854 1.341 S5 16.011 3.745 1.90 31.31 S6 -19.57 1.005 S7 16.094 4.647 1.57 71.30 S8 -8.61 0.1 STO Infinity 0.799 S10 -5.932 0.7 1.85 23.78 S11 -50 1.776 1.59 68.34 S12 -5.758 0.233 S13 125.39 2.884 1.59 61.15 S14 -10.439 2.047 S15 Infinity 0.5 1.52 64.20 S16 Infinity 5.816 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0520] In Example 19, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 38 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 19.

[0521] Table 38

[0522]

[0523] from Figure 38 As can be seen, the optical lens given in Example 19 has good imaging quality.

[0524] Example 20

[0525] The following is for reference Figure 39 The optical lens according to Embodiment 20 of this application is described.

[0526] like Figure 39 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 of the seventh lens L7 has at least one inflection point.

[0527] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0528] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0529] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0530] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0531] The fifth lens L5 has negative optical power. The first side surface S10 of the fifth lens L5 is concave, and the second side surface S11 of the fifth lens L5 is convex.

[0532] The sixth lens L6 has positive optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is convex.

[0533] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0534] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0535] Table 39 shows the basic parameters of the optical lens of Example 20.

[0536] Table 39

[0537] S1 13.866 1.2 1.83 42.73 S2 5.357 3.853 S3 -10.544 0.7 1.50 81.61 S4 6.851 1.342 S5 16.015 3.744 1.90 31.31 S6 -19.576 1.004 S7 16.103 4.647 1.57 71.30 S8 -8.61 0.1 STO Infinitv 0.801 S10 -5.933 0.7 1.85 23.78 S11 -50 1.776 1.59 68.34 S12 -5.758 0.233 S13 123.594 2.885 1.59 61.15 S14 -10.446 2.047 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 5.815 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0538] In Example 20, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 40 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 20.

[0539] Table 40

[0540]

[0541] from Figure 40 As can be seen, the optical lens given in Example 20 has good imaging quality.

[0542] Example 21

[0543] The following is for reference Figure 41 The optical lens according to Embodiment 21 of this application is described.

[0544] like Figure 41 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0545] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0546] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0547] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0548] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0549] The fifth lens L5 has negative optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is concave.

[0550] The sixth lens L6 has positive optical power. The first side surface S11 of the sixth lens L6 is convex, and the second side surface S12 of the sixth lens L6 is concave.

[0551] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0552] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0553] Table 41 shows the basic parameters of the optical lens of Example 21.

[0554] Table 41

[0555] S1 13.868 1.328 1.83 42.73 S2 4.797 4.543 S3 -8.043 0.7 1.50 81.61 S4 12.222 1.639 S5 33.347 4.185 1.90 31.31 S6 -16.926 0.966 S7 8.341 4.717 1.57 71.30 S8 -446.477 0.1 STO Infinitv 0.1 S10 8.516 0.7 1.85 23.78 S11 3.801 2.303 1.59 68.34 S12 50 2.635 S13 19.03 2.73 1.59 61.15 S14 -38.278 0.205 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0556] In Example 21, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 42 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 21.

[0557] Table 42

[0558]

[0559] from Figure 42 As can be seen, the optical lens given in Example 21 has good imaging quality.

[0560] Example 22

[0561] The following is for reference Figure 43 The optical lens according to Embodiment 22 of this application is described.

[0562] like Figure 43 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0563] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0564] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0565] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0566] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0567] The fifth lens L5 has negative optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is concave.

[0568] The sixth lens L6 has positive optical power. The first side surface S11 of the sixth lens L6 is convex, and the second side surface S12 of the sixth lens L6 is concave.

[0569] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is convex.

[0570] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0571] Table 43 shows the basic parameters of the optical lens of Example 22.

[0572] Table 43

[0573] S1 13.542 1.426 1.83 42.73 S2 4.741 4.556 S3 -8.001 0.7 1.50 81.61 S4 12.279 1.633 S5 33.137 4.271 1.90 31.31 S6 -16.991 0.803 S7 8.354 4.724 1.57 71.30 S8 -246.977 0.1 STO Infinitv 0.1 S10 8.522 0.7 1.85 23.78 S11 3.787 2.3 1.59 68.34 S12 50 2.626 S13 19.965 2.747 1.59 61.15 S14 -34.341 0.163 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.005 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0574] In Example 22, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 44 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 22.

[0575] Table 44

[0576]

[0577] from Figure 44 As can be seen, the optical lens given in Example 22 has good imaging quality.

[0578] Example 23

[0579] The following is for reference Figure 45The optical lens according to Embodiment 23 of this application is described.

[0580] like Figure 45 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0581] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0582] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0583] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0584] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0585] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0586] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0587] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is concave, and the second side surface S14 of the seventh lens L7 is convex.

[0588] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0589] Table 45 shows the basic parameters of the optical lens of Example 23.

[0590] Table 45

[0591] S1 19.77 1.209 1.83 42.73 S2 4.894 4.727 S3 -9.798 0.7 1.50 81.61 S4 9.962 1.034 S5 14.372 3.734 1.90 31.31 S6 -64.979 1.659 S7 8.292 5.131 1.57 71.30 S8 -21.92 0.1 STO Infinitv 0.1 S10 7.895 2.185 1.59 68.34 S11 -8.225 0.7 1.85 23.78 S12 41.834 1.893 S13 -50 2.387 1.59 61.15 S14 -14.286 0.718 S15 Infinity 0.5 1.52 64.20 S16 Infinity 4.578 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0592] In Example 23, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 46 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 23.

[0593] Table 46

[0594]

[0595] from Figure 46 As can be seen, the optical lens given in Example 23 has good imaging quality.

[0596] Example 24

[0597] The following is for reference Figure 47 The optical lens according to Embodiment 24 of this application is described.

[0598] like Figure 47 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be positioned between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens.

[0599] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0600] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0601] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0602] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0603] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0604] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0605] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is concave, and the second side surface S14 of the seventh lens L7 is convex.

[0606] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0607] Table 47 shows the basic parameters of the optical lens of Example 24.

[0608] Table 47

[0609] S1 19.963 1.2 1.83 42.73 S2 4.892 4.716 S3 -9.846 0.7 1.50 81.61 S4 10.231 1.02 S5 14.557 3.724 1.90 31.31 S6 -64.452 1.746 S7 8.206 5.12 1.57 71.30 S8 -22.936 0.1 STO Infinity 0.1 S10 7.8 2.194 1.59 68.34 S11 -8.343 0.7 1.85 23.78 S12 38.477 1.798 S13 -50 2.377 1.59 61.15 S14 -14.286 0.75 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.608 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0610] In Example 24, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 48 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 24.

[0611] Table 48

[0612]

[0613] from Figure 48 As can be seen, the optical lens given in Example 24 has good imaging quality.

[0614] Example 25

[0615] The following is for reference Figure 49 The optical lens according to Embodiment 25 of this application is described.

[0616] like Figure 49 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 and the second side surface S14 of the seventh lens L7 each have at least one inflection point.

[0617] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0618] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0619] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0620] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0621] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0622] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0623] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is concave.

[0624] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0625] Table 49 shows the basic parameters of the optical lens of Example 25.

[0626] Table 49

[0627] S1 16.313 1.2 1.83 42.73 S2 4.851 4.899 S3 -10.191 0.7 1.50 81.61 S4 10.911 1.114 S5 16.619 3.568 1.90 31.31 S6 -83.951 1.312 S7 9.2 4.887 1.57 71.30 S8 -23.862 0.1 ST0 Infinitv 1.044 S10 7.156 2.192 1.59 68.34 S11 -9.329 0.7 1.85 23.78 S12 38.012 2.235 S13 13.796 2.315 1.59 61.15 S14 50 0.584 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0628] In Example 25, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 50 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 25.

[0629] Table 50

[0630]

[0631] from Figure 50 As can be seen, the optical lens given in Example 25 has good imaging quality.

[0632] Example 26

[0633] The following is for reference Figure 51 The optical lens according to Embodiment 26 of this application is described.

[0634] like Figure 51 As shown, the optical lens, along the optical axis from the first side to the second side, includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7. An aperture stop STO can be disposed between the fourth lens L4 and the fifth lens L5. The fifth lens L5 and the sixth lens L6 are cemented together to form a cemented lens. The first side surface S13 and the second side surface S14 of the seventh lens L7 each have at least one inflection point.

[0635] The first lens L1 has negative optical power, the first side surface S1 of the first lens L1 is convex, and the second side surface S2 of the first lens L1 is concave.

[0636] The second lens L2 has negative optical power. The first side surface S3 of the second lens L2 is concave, and the second side surface S4 of the second lens L2 is concave.

[0637] The third lens L3 has positive optical power. The first side surface S5 of the third lens L3 is convex, and the second side surface S6 of the third lens L3 is convex.

[0638] The fourth lens L4 has positive optical power. The first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex.

[0639] The fifth lens L5 has positive optical power. The first side surface S10 of the fifth lens L5 is convex, and the second side surface S11 of the fifth lens L5 is convex.

[0640] The sixth lens L6 has negative optical power. The first side surface S11 of the sixth lens L6 is concave, and the second side surface S12 of the sixth lens L6 is concave.

[0641] The seventh lens L7 has positive optical power. The first side surface S13 of the seventh lens L7 is convex, and the second side surface S14 of the seventh lens L7 is concave.

[0642] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the seventh lens L7 and the image plane IMA. The filter IR has a first side surface S15 and a second side surface S16, and the protective glass CG has a first side surface S17 and a second side surface S18. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0643] Table 51 shows the basic parameters of the optical lens of Example 26.

[0644] Table 51

[0645] S1 17.005 1.2 1.83 42.73 S2 4.851 4.847 S3 -10.126 0.7 1.50 81.61 S4 12.21 1.262 S5 17.862 3.552 1.90 31.31 S6 -61.794 1.206 S7 9.275 4.859 1.57 71.30 S8 -25.229 0.1 STO Infinity 1.041 S10 7.286 2.154 1.59 68.34 S11 -9.41 0.7 1.85 23.78 S12 30.446 2.267 S13 12.249 2.381 1.59 61.15 S14 50 0.581 S15 Infinitv 0.5 1.52 64.20 S16 Infinity 4.004 S17 Infinitv 0.5 1.52 64.20 S18 Infinity 0.15 IMA / /

[0646] In Example 26, the first side surface S13 and the second side surface S14 of the seventh lens L7 are both aspherical surfaces. Table 52 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14 and A16 that can be used for each aspherical surface S13 and S14 in Example 26.

[0647] Table 52

[0648]

[0649] from Figure 52 As can be seen, the optical lens given in Example 26 has good imaging quality.

[0650] Tables 53-1 to 53-5 provide the basic parameters of the optical lenses in Examples 1-26, such as F, φ, TTL, θ, H, and BFL. The units for parameters φ, φ1, and φ2 are mm⁻¹, the unit for parameter θ is rad, the unit for parameter arctan(1 / K(S14)) is °, and the units for other parameters are mm. E1-E26 represent Examples 1-26, respectively. Tables 54-1 to 54-5 provide the numerical values ​​of the various relationships for the optical lenses in Examples 1-26.

[0651] Table 53-1

[0652] F 4.704 4.704 4.714 4.707 4.656 4.659 φ 0.213 0.213 0.212 0.213 0.215 0.215 TTL 32.002 32.002 32.004 32.003 32.003 32.002 θ 2.013 2.013 2.016 2.014 2.001 2.001 H 9.253 9.253 9.253 9.254 9.254 9.254 D 13.948 13.947 13.215 13.288 13.951 13.945 BFL 5.379 5.38 5.473 5.529 5.533 5.465 F1 -8.524 -8.524 -7.505 -7.518 -9.556 -9.673 F2 -10.117 -10.116 -22.275 -24.627 -9.238 -8.935 F3 12.899 12.897 20.582 22.685 16.797 16.948 F4 11.797 11.796 12.062 12.156 12.379 11.987 F5 7.518 7.518 7.447 7.059 6.666 6.654 F6 -7.436 -7.435 -6.584 -6.459 -7.74 -7.834 F7 23.145 23.133 24.087 27.828 24.985 26.544 D2 9.004 9.004 8.621 8.658 8.938 8.955 D3 8.599 8.599 8.327 8.391 8.375 8.364 D14 8.052 8.051 7.311 7.1 7.601 7.609 SAG2 3.071 3.071 2.737 2.768 3.303 3.302 SAG3 -1.007 -1.007 -1.202 -1.143 -0.822 -0.84 SAG14 -0.471 -0.471 -0.384 -0.325 -0.314 -0.382 arctan(1 / K(S14)) -25.991 -25.973 -18.851 -16.226 -18.59 -20.35 φ1 -0.117 -0.117 -0.133 -0.133 -0.105 -0.103 φ2 -0.099 -0.099 -0.045 -0.041 -0.108 -0.112

[0653] Table 53-2

[0654] F 4.72 4.719 4.698 4.701 4.677 4.677 φ 0.212 0.212 0.213 0.213 0.214 0.214 TTL 32.004 32.004 32.003 32.003 32.004 32.004 θ 2.017 2.017 2.009 2.01 2.01 2.01 H 9.254 9.254 9.256 9.256 9.254 9.254 D 13.165 13.179 13.943 13.946 13.937 13.936 BFL 5.383 5.391 6.349 6.268 5.207 5.205 F1 -7.589 -7.598 -8.5 -8.471 -9.33 -9.329 F2 -18.678 -18.721 -13.916 -14.794 -9.402 -9.396 F3 20.693 20.693 21.238 21.994 11.394 11.389 F4 12.463 12.469 13.726 13.781 20.163 20.147 F5 7.739 7.74 6.162 6.191 6.881 6.881 F6 -6.765 -6.78 -6.887 -6.728 -7.599 -7.601 F7 17.764 17.856 26.501 25.703 14.47 14.471 D2 8.631 8.641 9.047 9.055 8.912 8.912 D3 8.299 8.305 8.642 8.654 8.378 8.378 D14 7.666 7.657 6.954 6.956 8.74 8.73 SAG2 2.693 2.698 3.035 3.027 3.262 3.262 SAG3 -1.322 -1.323 -0.98 -1.019 -0.739 -0.74 SAG14 -0.474 -0.466 -0.485 -0.48 -0.644 -0.642 arctan(1 / K(S14)) -21.269 -21.024 -20.379 -20.111 -36.902 -36.776 φ1 -0.132 -0.132 -0.118 -0.118 -0.107 -0.107 φ2 -0.054 -0.053 -0.072 -0.068 -0.106 -0.106

[0655] Table 53-3

[0656] F 4.67 4.669 4.705 4.7 4.672 4.673 φ 0.214 0.214 0.213 0.213 0.214 0.214 TTL 32.002 32.003 32 32 32 32 θ 2.01 2.01 2.008 2.006 2.009 2.009 H 9.254 9.254 9.254 9.252 9.255 9.255 D 14.008 14.008 13.567 19.726 12 12 BFL 7.279 7.274 5.326 5.311 8.655 8.698 F1 -8.968 -8.969 -8.591 -8.697 -8.495 -8.517 F2 -10.394 -10.394 -9.426 -9.335 -10.181 -10.334 F3 18.383 18.378 16.15 16.213 9.021 9.043 F4 10.361 10.358 11.3 11.25 18.223 19.291 F5 7.624 7.628 6.723 6.704 -5.348 -5.308 F6 -8.966 -8.964 -8.355 -8.274 6.615 6.632 F7 22.868 22.867 35.953 36.042 13.906 13.257 D2 9.024 9.023 8.748 8.779 8.407 8.435 D3 8.545 8.544 8.264 8.281 8.015 8.034 D14 7.01 7.014 7.76 7.753 8.132 8.143 SAG2 3.16 3.161 2.999 3.025 2.37 2.348 SAG3 -0.662 -0.662 -0.936 -0.928 -0.654 -0.631 SAG14 -0.125 -0.125 -0.522 -0.538 -1.338 -1.363 arctan(1 / K(S14)) -8.54 -8.56 -23.64 -24.256 -45.277 -46.356 φ1 -0.112 -0.112 -0.116 -0.115 -0.118 -0.117 φ2 -0.096 -0.096 -0.106 -0.107 -0.098 -0.097

[0657] Table 53-4

[0658] F 4.666 4.666 4.695 4.697 4.699 4.699 φ 0.214 0.214 0.213 0.213 0.213 0.213 TTL 31.996 31.996 32.004 32.005 32.003 32.003 0 2.025 2.025 2.013 2.012 2.008 2.009 H 9.255 9.255 9.252 9.252 9.252 9.252 D 12 12 13 13 13.68 13.664 BFL 9.013 9.012 5.359 5.318 6.446 6.508 F1 -11.145 -11.15 -9.393 -9.417 -8.075 -8.037 F2 -8.237 -8.237 -9.639 -9.626 -9.812 -9.969 F3 10.23 10.232 12.9 12.918 13.285 13.404 F4 10.566 10.568 14.425 14.279 11.253 11.28 F5 -7.979 -7.98 -8.671 -8.603 7.148 7.154 F6 10.802 10.802 6.805 6.776 -8.038 -8.014 F7 16.464 16.457 21.932 21.808 33.079 33.082 D2 8.713 8.713 8.566 8.505 8.927 8.922 D3 7.944 7.943 8.086 8.039 8.564 8.574 D14 7.732 7.733 8.279 8.308 7.155 7.107 SAG2 2.24 2.24 2.637 2.644 2.886 2.885 SAG3 -0.777 -0.777 -1.09 -1.083 -0.985 -0.982 SAG14 -0.921 -0.92 -0.496 -0.541 -0.621 -0.604 arctan(1 / K(S14)) -32.746 -32.737 -15.853 -17.111 -22.143 -21.479 φ1 -0.09 -0.09 -0.106 -0.106 -0.124 -0.124 φ2 -0.121 -0.121 -0.104 -0.104 -0.102 -0.1

[0659] Table 53-5

[0660] F 4.695 4.705 φ 0.213 0.213 TTL 32.004 32.004 0 2.009 2.012 H 9.254 9.255 D 13.982 13.929 BFL 5.738 5.735 F1 -8.667 -8.495 F2 -10.475 -11.01 F3 15.572 15.622 F4 12.314 12.544 F5 7.178 7.267 F6 -8.755 -8.391 F7 31.547 26.868 D2 9.04 9.009 D3 8.604 8.605 D14 7.305 7.423 SAG2 3.09 3.05 SAG3 -0.953 -0.96 SAG14 -0.11 -0.118 arctan(1 / K(S14)) -10.695 -12.085 φ1 -0.115 -0.118 φ2 -0.095 -0.091

[0661] Table 54-1

[0662] BFL / F 1.143 1.144 1.161 1.175 1.188 1.173 BFL / TTL 0.168 0.168 0.171 0.173 0.173 0.171 |SAG14 / d13| 0.18 0.18 0.156 0.137 0.126 0.154 d2 / F 1.045 1.045 1.018 1.008 1.072 1.076 d2 / TTL 0.154 0.154 0.15 0.148 0.156 0.157 F7 / F 4.92 4.918 5.11 5.912 5.366 5.697 F1 / F -1.812 -1.812 -1.592 -1.597 -2.052 -2.076 D / H / F 0.32 0.32 0.303 0.305 0.324 0.323 R1 / TTL 0.523 0.523 0.687 0.687 0.393 0.389 (F×θ) / D 0.679 0.679 0.719 0.713 0.668 0.669 |(d4-R4) / R5| 0.569 0.568 0.323 0.633 0.511 0.488 TTL / D 2.294 2.295 2.422 2.408 2.294 2.295 F5 / F6 -1.011 -1.011 -1.131 -1.093 -0.861 -0.849 R2 / R3 -0.5 -0.499 -0.61 -0.577 -0.422 -0.433 (SAG2 / D2) / (SAG3 / D3) -2.912 -2.912 -2.199 -2.347 -3.765 -3.672 (d1+d3+d5+d7+d10+d11+d13) / TTL 0.502 0.502 0.592 0.603 0.536 0.539 (|φ1|+1φ2|) / 1φ| 1.014 1.014 0.84 0.817 0.991 1 SAG14 / D14 -0.058 -0.059 -0.053 -0.046 -0.041 -0.05 d4 / TTL 0.049 0.049 0.007 0.003 0.058 0.055 F2 / F -2.151 -2.151 -4.725 -5.232 -1.984 -1.918 F3 / F 2.742 2.742 4.366 4.819 3.608 3.638 R7 / (d7+R8) -0.812 -0.813 -0.306 -0.229 -1.088 -1.183 d6 / d7 0.162 0.162 0.02 0.02 0.021 0.021 d6 / F 0.171 0.171 0.021 0.021 0.021 0.021 F4 / F 2.508 2.508 2.559 2.583 2.659 2.573 d12 / TTL 0.096 0.096 0.053 0.044 0.067 0.069 |d2 / F1| 0.577 0.577 0.639 0.631 0.522 0.518 BFL / F7 0.232 0.233 0.227 0.199 0.221 0.206 d6 / (F3+F4) 0.033 0.033 0.003 0.003 0.003 0.003 |arctan(1 / K(S14))| 25.991 25.973 18.851 16.226 18.59 20.35

[0663] Table 54-2

[0664] BFL / F 1.14 1.142 1.351 1.333 1.113 1.113 BFL / TTL 0.168 0.168 0.198 0.196 0.163 0.163 |SAG14 / d13| 0.178 0.175 0.202 0.199 0.209 0.208 d2 / F 1.028 1.032 1.034 1.041 1.037 1.037 d2 / TTL 0.152 0.152 0.152 0.153 0.152 0.152 F7 / F 3.764 3.784 5.641 5.468 3.094 3.094 F1 / F -1.608 -1.61 -1.809 -1.802 -1.995 -1.995 D / H / F 0.301 0.302 0.321 0.321 0.322 0.322 R1 / TTL 0.687 0.687 0.543 0.552 0.407 0.407 (F×θ) / D 0.723 0.722 0.677 0.678 0.675 0.675 |(d4-R4) / R5| 0.661 0.658 0.364 0.359 0.682 0.682 TTL / D 2.431 2.428 2.295 2.295 2.296 2.296 F5 / F6 -1.144 -1.142 -0.895 -0.92 -0.906 -0.905 R2 / R3 -0.67 -0.67 -0.488 -0.505 -0.382 -0.382 (SAG2 / D2) / (SAG3 / D3) -1.959 -1.96 -2.958 -2.839 -4.15 -4.144 (d1+d3+d5+d7+d10+d11+d13) / TTL 0.571 0.569 0.494 0.494 0.549 0.549 (|φ1|+|φ2|) / |φ| 0.877 0.873 0.892 0.873 0.995 0.995 SAG14 / D14 -0.062 -0.061 -0.07 -0.069 -0.074 -0.074 d4 / TTL 0.019 0.019 0.08 0.084 0.031 0.031 F2 / F -3.957 -3.967 -2.962 -3.147 -2.01 -2.009 F3 / F 4.384 4.385 4.521 4.679 2.436 2.435 R7 / (d7+R8) -0.417 -0.412 0.127 0.128 9.069 9.079 d6 / d7 0.018 0.02 0.04 0.02 0.07 0.07 d6 / F 0.021 0.023 0.044 0.021 0.062 0.062 F4 / F 2.64 2.642 2.922 2.932 4.311 4.308 d12 / TTL 0.063 0.063 0.031 0.031 0.09 0.091 |d2 / F1| 0.64 0.641 0.571 0.577 0.52 0.52 BFL / F7 0.303 0.302 0.24 0.244 0.36 0.36 d6 / (F3+F4) 0.003 0.003 0.006 0.003 0.009 0.009 |arctan(1 / K(S14))| 21.269 21.024 20.379 20.111 36.902 36.776

[0665] Table 54-3

[0666] BFL / F 1.559 1.558 1.132 1.13 1.853 1.861 BFL / TTL 0.227 0.227 0.166 0.166 0.27 0.272 |SAG14 / d13| 0.05 0.05 0.213 0.219 0.403 0.414 d2 / F 0.998 0.999 1.017 1.023 0.827 0.818 d2 / TTL 0.146 0.146 0.149 0.15 0.121 0.119 F7 / F 4.897 4.898 7.641 7.669 2.976 2.837 F1 / F -1.92 -1.921 -1.826 -1.85 -1.818 -1.823 D / H / F 0.324 0.324 0.312 0.454 0.278 0.277 R1 / TTL 0.464 0.464 0.471 0.462 0.553 0.567 (F×θ) / D 0.67 0.67 0.696 0.478 0.782 0.782 |(d4-R4) / R5| 0.095 0.095 0.369 0.369 0.503 0.501 TTL / D 2.285 2.285 2.359 1.622 2.667 2.667 F5 / F6 -0.85 -0.851 -0.805 -0.81 -0.808 -0.8 R2 / R3 -0.34 -0.34 -0.489 -0.484 -0.39 -0.379 (SAG2 / D2) / (SAG3 / D3) -4.52 -4.521 -3.027 -3.075 -3.455 -3.544 (d1+d3+d5+d7+d10+d11+d13) / TTL 0.488 0.488 0.502 0.507 0.516 0.515 (|φ1|+|φ2|) / |φ| 0.972 0.972 1.042 1.042 1.009 1 SAG14 / D14 -0.018 -0.018 -0.067 -0.069 -0.165 -0.167 d4 / TTL 0.052 0.052 0.049 0.05 0.065 0.067 F2 / F -2.226 -2.226 -2.003 -1.986 -2.179 -2.211 F3 / F 3.936 3.936 3.433 3.45 1.931 1.935 R7 / (d7+R8) -0.505 -0.507 -0.739 -0.754 0.037 0.102 d6 / d7 0.019 0.019 0.02 0.02 0.023 0.023 d6 / F 0.021 0.021 0.021 0.021 0.021 0.021 F4 / F 2.219 2.218 2.402 2.394 3.9 4.128 d12 / TTL 0.016 0.016 0.088 0.086 0.008 0.008 |d2 / F1| 0.52 0.52 0.557 0.553 0.455 0.449 BFL / F7 0.318 0.318 0.148 0.147 0.622 0.656 d6 / (F3+F4) 0.003 0.003 0.004 0.004 0.004 0.004 |arctan(1 / K(S14))| 8.54 8.56 23.64 24.256 45.277 46.356

[0667] Table 54-4

[0668] BFL / F 1.932 1.931 1.141 1.132 1.372 1.385 BFL / TTL 0.282 0.282 0.167 0.166 0.201 0.203 |SAG14 / d13| 0.319 0.319 0.182 0.197 0.26 0.254 d2 / F 0.826 0.826 0.968 0.97 1.006 1.004 d2 / TTL 0.12 0.12 0.142 0.142 0.148 0.147 F7 / F 3.529 3.527 4.671 4.643 7.04 7.04 F1 / F -2.389 -2.39 -2.001 -2.005 -1.718 -1.71 D / H / F 0.278 0.278 0.299 0.299 0.315 0.314 R1 / TTL 0.434 0.433 0.433 0.423 0.618 0.624 (F×θ) / D 0.787 0.787 0.727 0.727 0.69 0.691 |(d4-R4) / R5| 0.344 0.344 0.317 0.321 0.621 0.633 TTL / D 2.666 2.666 2.462 2.462 2.339 2.342 F5 / F6 -0.739 -0.739 -1.274 -1.27 -0.889 -0.893 R2 / R3 -0.508 -0.508 -0.596 -0.593 -0.499 -0.497 (SAG2 / D2) / (SAG3 / D3) -2.628 -2.628 -2.284 -2.308 -2.811 -2.823 (d1+d3+d5+d7+d10+d11+d13) / TTL 0.489 0.489 0.521 0.527 0.501 0.5 (|φ1|+|φ2|) / |φ| 0.986 0.986 0.986 0.986 1.061 1.052 SAG14 / D14 -0.119 -0.119 -0.06 -0.065 -0.087 -0.085 d4 / TTL 0.042 0.042 0.051 0.051 0.032 0.032 F2 / F -1.765 -1.765 -2.053 -2.049 -2.088 -2.122 F3 / F 2.192 2.193 2.748 2.75 2.827 2.853 R7 / (d7+R8) -4.061 -4.063 -0.019 -0.034 -0.494 -0.461 d6 / d7 0.216 0.216 0.205 0.17 0.323 0.341 d6 / F 0.215 0.215 0.206 0.171 0.353 0.372 F4 / F 2.264 2.265 3.072 3.04 2.395 2.401 d12 / TTL 0.007 0.007 0.082 0.082 0.059 0.056 |d2 / F1| 0.346 0.346 0.484 0.484 0.585 0.587 BFL / F7 0.547 0.548 0.244 0.244 0.195 0.197 d6 / (F3+F4) 0.048 0.048 0.035 0.03 0.068 0.071 |arctan(1 / K(S14))| 32.746 32.737 15.853 17.111 22.143 21.479

[0669] Table 54-5

[0670] BFL / F 1.222 1.219 BFL / TTL 0.179 0.179 |SAG14 / d13| 0.048 0.05 d2 / F 1.043 1.03 d2 / TTL 0.153 0.151 F7 / F 6.719 5.711 F1 / F -1.846 -1.806 D / H / F 0.322 0.32 R1 / TTL 0.51 0.531 (F×θ) / D 0.675 0.68 |(d4-R4) / R5| 0.59 0.613 TTL / D 2.289 2.298 F5 / F6 -0.82 -0.866 R2 / R3 -0.476 -0.479 (SAG2 / D2) / (SAG3 / D3) -3.086 -3.035 (d1+d3+d5+d7+d10+d11+d13) / TTL 0.486 0.486 (|φ1|+|φ2|) / |φ| 0.986 0.981 SAG14 / D14 -0.015 -0.016 d4 / TTL 0.035 0.039 F2 / F -2.231 -2.34 F3 / F 3.317 3.32 R7 / (d7+R8) -0.485 -0.455 d6 / d7 0.268 0.248 d6 / F 0.279 0.256 F4 / F 2.623 2.666 d12 / TTL 0.07 0.071 |d2 / F1| 0.565 0.571 BFL / F7 0.182 0.213 d6 / (F3+F4) 0.047 0.043 |arctan(1 / K(S14))| 10.695 12.085

[0671] This application also provides an electronic device including an optical lens as described in the exemplary embodiments above and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element is disposed on a second side of the optical lens, for example, on an imaging surface, and may be, for example, a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0672] This application also provides an electronic device including an optical lens and a light source as described in the exemplary embodiments above, with the light source located on a second side of the optical lens. Light emitted from the light source is projected onto a first side of the optical lens after passing through it, forming an image or illuminating an area on the first side.

[0673] This application also provides an electronic device, including a first device and a second device. The first device may be, for example, a lidar transmitter, and the second device may be, for example, a lidar receiver. The first device may include the optical lens and light source as described in the exemplary embodiments above. The light source is located on the second side of the optical lens, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side. The second device may include the optical lens as described in the exemplary embodiments above and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element is disposed on the second side of the optical lens (e.g., disposed on the imaging surface), and the imaging element may be, for example, a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The light from the first side is imaged on the second side after passing through the optical lens.

[0674] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An optical lens, characterized in that, Along the optical axis, from the first side to the second side, the following are included in sequence: A first lens with negative optical power, wherein the first side surface of the first lens is convex and the second side surface of the first lens is concave; A second lens having negative optical power, wherein the first side surface of the second lens is concave. A third lens having positive optical power, wherein the first side surface and / or the second side surface of the third lens are convex surfaces; A fourth lens having positive optical power, wherein the first side surface and / or the second side surface of the fourth lens are convex surfaces; A fifth lens with optical power; A sixth lens with optical power; A seventh lens with positive optical power; The fifth lens and the sixth lens are cemented together to form a cemented lens; The fifth lens and the sixth lens have opposite positive and negative optical power properties; The optical lens has seven lenses with optical power. The optical lens satisfies the following conditions: 0.01≤d6 / d7≤0.39 and 0.95≤BFL / F≤2.22; Wherein, d6 is the center distance between the third lens and the fourth lens, d7 is the center thickness of the fourth lens, F is the focal length of the optical lens, and BFL is the optical back focal length of the optical lens.

2. The optical lens according to claim 1, characterized in that, The second side surface of the second lens is either convex or concave.

3. The optical lens according to claim 1, characterized in that, The first side surface of the third lens is convex, and the second side surface of the third lens is convex; or... The first side surface of the third lens is convex, and the second side surface of the third lens is concave; or... The first side surface of the third lens is concave, and the second side surface of the third lens is convex.

4. The optical lens according to claim 1, characterized in that, The first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex; or... The first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave; or... The first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

5. The optical lens according to claim 1, characterized in that, The fifth lens has a positive optical power, and the sixth lens has a negative optical power.

6. The optical lens according to claim 1, characterized in that, The fifth lens has a negative optical power, and the sixth lens has a positive optical power.

7. The optical lens according to claim 1, characterized in that, The first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex; or... The first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex; or... The first side surface of the fifth lens is concave, and the second side surface of the fifth lens is concave; or... The first side surface of the fifth lens is convex, and the second side surface of the fifth lens is concave.

8. The optical lens according to claim 1, characterized in that, The first side surface of the seventh lens is convex, and the second side surface of the seventh lens is convex; or... The first side surface of the seventh lens is concave, and the second side surface of the seventh lens is convex; or... The first side surface of the seventh lens is convex, and the second side surface of the seventh lens is concave.

9. The optical lens according to any one of claims 1 to 8, characterized in that, The optical back focal length BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.14≤BFL / TTL≤0.

32.

10. The optical lens according to any one of claims 1 to 8, characterized in that, The sag SAG14 of the second side surface of the seventh lens and the central thickness d13 of the seventh lens satisfy: 0.04≤|SAG14 / d13|≤0.

48.

11. The optical lens according to any one of claims 1 to 8, characterized in that, The central distance d2 between the first lens and the second lens and the focal length F of the optical lens satisfy: 0.7≤d2 / F≤1.

24.

12. The optical lens according to any one of claims 1 to 8, characterized in that, The central distance d2 between the first lens and the second lens and the total optical length TTL of the optical lens satisfy: 0.1≤d2 / TTL≤0.

18.

13. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F7 of the seventh lens and the focal length F of the optical lens satisfy: 2≤F7 / F≤10.

14. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F7 of the seventh lens and the focal length F of the optical lens satisfy: 4.5≤F7 / F≤7.

8.

15. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F1 of the first lens and the focal length F of the optical lens satisfy: -2.75≤F1 / F≤-1.

35.

16. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F1 of the first lens and the focal length F of the optical lens satisfy: -2.1≤F1 / F≤-1.

5.

17. The optical lens according to any one of claims 1 to 8, characterized in that, The maximum clear aperture D of the optical lens, the full image height H of the optical lens and the focal length F of the optical lens satisfy: 0.24≤D / (H×F)≤0.

52.

18. The optical lens according to any one of claims 1 to 8, characterized in that, The curvature radius R1 of the first side surface of the first lens and the total optical length TTL of the optical lens satisfy: 0.33≤R1 / TTL≤0.

79.

19. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens and the maximum clear aperture D of the optical lens satisfy: 0.41≤(F×θ) / D≤0.

91.

20. The optical lens according to any one of claims 1 to 8, characterized in that, The central distance d4 between the second lens and the third lens, the curvature radius R4 of the second side surface of the second lens and the curvature radius R5 of the first side surface of the third lens satisfy: 0.08≤|(d4-R4) / R5|≤0.

78.

21. The optical lens according to any one of claims 1 to 8, characterized in that, The total optical length TTL of the optical lens and the maximum clear aperture D of the optical lens satisfy: 1.38≤TTL / D≤3.

07.

22. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F5 of the fifth lens and the focal length F6 of the sixth lens satisfy: -1.47≤F5 / F6≤-0.

63.

23. The optical lens according to any one of claims 1 to 8, characterized in that, The curvature radius R2 of the second side surface of the first lens and the curvature radius R3 of the first side surface of the second lens satisfy: -0.77≤R2 / R3≤-0.

29.

24. The optical lens according to any one of claims 1 to 8, characterized in that, The sag SAG2 of the second side surface of the first lens, the clear aperture D2 of the second side surface of the first lens corresponding to the maximum field of view of the optical lens, the sag SAG3 of the first side surface of the second lens and the clear aperture D3 of the first side surface of the second lens corresponding to the maximum field of view of the optical lens satisfy: -5.2≤(SAG2 / D2) / (SAG3 / D3)≤-1.

66.

25. The optical lens according to any one of claims 1 to 8, characterized in that, The center thickness d1 of the first lens, the center thickness d3 of the second lens, the center thickness d5 of the third lens, the center thickness d7 of the fourth lens, the center thickness d10 of the fifth lens, the center thickness d11 of the sixth lens, and the center thickness d13 of the seventh lens satisfy: 0.41≤(d1+d3+d5+d7+d10+d11+d13) / TTL≤0.

69.

26. The optical lens according to any one of claims 1 to 8, characterized in that, The optical power φ1 of the first lens, the optical power φ2 of the second lens, and the optical power φ of the optical lens satisfy: 0.69≤(|φ1|+|φ2|) / |φ|≤1.

22.

27. The optical lens according to any one of claims 1 to 8, characterized in that, The sag SAG14 of the second side surface of the seventh lens and the clear aperture D14 of the second side surface of the seventh lens corresponding to the maximum field angle of the optical lens satisfy: -0.19≤SAG14 / D14≤-0.

01.

28. The optical lens according to any one of claims 1 to 8, characterized in that, The center spacing d4 between the second lens and the third lens and the total optical length TTL of the optical lens satisfy: 0.002≤d4 / TTL≤0.

098.

29. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F2 of the second lens and the focal length F of the optical lens satisfy: -6.2≤F2 / F≤-1.

3.

30. The optical lens according to any one of claims 1 to 8, characterized in that, The curvature radius R7 of the first side surface of the fourth lens, the center thickness d7 of the fourth lens, and the curvature radius R8 of the second side surface of the fourth lens satisfy: -4.67≤R7 / (d7+R8)≤10.

44.

31. The optical lens according to any one of claims 1 to 8, characterized in that, The center spacing d6 between the third lens and the fourth lens and the focal length F of the optical lens satisfy: 0.02≤d6 / F≤0.

43.

32. The optical lens according to any one of claims 1 to 8, characterized in that, The opening angle of the second side surface of the seventh lens arctan(1 / K(S14)) satisfies: 7≤|arctan(1 / K(S14))|≤54.

33. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F4 of the fourth lens and the focal length F of the optical lens satisfy: 1.88≤F4 / F≤4.

96.

34. The optical lens according to any one of claims 1 to 8, characterized in that, The focal length F3 of the third lens and the focal length F of the optical lens satisfy: 1.63≤F3 / F≤5.

55.

35. The optical lens according to any one of claims 1 to 8, characterized in that, The center spacing d12 between the sixth lens and the seventh lens and the total optical length TTL of the optical lens satisfy: 0.05≤d12 / TTL≤0.

11.

36. The optical lens according to any one of claims 1 to 8, characterized in that, The center spacing d2 between the first lens and the second lens and the focal length F1 of the first lens satisfy: 0.25≤|d2 / F1|≤0.

82.

37. The optical lens according to any one of claims 1 to 8, characterized in that, The center spacing d6 between the third lens and the fourth lens, the focal length F3 of the third lens, and the focal length F4 of the fourth lens satisfy: 0<d6 / (F3+F4)≤0.

1.

38. The optical lens according to any one of claims 1 to 8, characterized in that, The Abbe number Vd2 of the second lens and the Abbe number Vd1 of the first lens satisfy: Vd2>1.8Vd1.

39. The optical lens according to any one of claims 1 to 8, characterized in that, The curvature radius at the edge of the second side surface of the seventh lens is smaller than the curvature radius at the center of the second side surface of the seventh lens.

40. The optical lens according to any one of claims 1 to 8, characterized in that, The back focal length BFL of the optical lens and the focal length F7 of the seventh lens satisfy: 0.17≤BFL / F7≤0.

67.

41. An electronic device, characterized in that, Comprises: the optical lens according to any one of claims 1 to 40; and at least one of an imaging element and a light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens. The light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminated area on the first side of the optical lens.

Images