Optical lens and electronic equipment

Abstract

The invention discloses an optical lens and electronic equipment, and relates to the field of optical elements. The optical lens sequentially comprises a first lens, a second lens, a third lens and a fourth lens from a first side to a second side along an optical axis, the second lens has positive focal power; the third lens has positive focal power; the fourth lens has negative focal power; 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; the first side face of the sixth lens is a convex face, and the second side face of the sixth lens is a concave face. The optical lens satisfies that F1 / F is greater than or equal to 1.322 and less than or equal to 9.25.

Description

Technical Field

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

[0002] Currently, with the development of intelligent headlights, users' demands for more user-friendly human-vehicle interaction and audio-visual entertainment are constantly increasing, which in turn raises the requirements for the resolution of intelligent headlight projection lenses. However, unlike ordinary projection lenses, intelligent headlight projection lenses have more specific requirements in terms of enhancing human-vehicle interaction and audio-visual entertainment.

[0003] Existing technologies have low projection resolution (e.g., MTF only meets 5lp / mm and 10lp / mm, and edge field of view MTF≥0.3), which is insufficient for restoring pattern details and cannot meet the requirements of high-precision human-vehicle interaction projection. Summary of the Invention

[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 positive optical power; a second lens having positive optical power; a third lens having positive optical power; a fourth lens having negative optical power; a fifth lens having positive optical power, wherein its first side surface is convex and its second side surface is convex; and a sixth lens having positive optical power, wherein its first side surface is convex and its second side surface is concave; the number of lenses having optical power in the optical lens is six; the optical lens satisfies: 1.322≤F1 / F≤9.25; where F is the total effective focal length of the optical lens and F1 is the effective focal length of the first lens.

[0005] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 46.375≤(FOV*F) / H≤66.221, 1.474≤TTL / F≤3.334, 0.165≤TTL / H / FOV≤0.425, 1.093≤TTL / DMAX≤1.944, 0.185≤(F*θ) / D≤0.308, 0.109≤D / H / FOV≤0.254, 0.074≤D / H / F≤0.170, 0.0013≤|(HF*θ) / (F*θ)|≤0.058, 0.044≤BFL / TTL≤0.14 3. 1.67≤F / H≤3.671, 0.595≤F / ENPD≤0.897, 0.011≤F / ENPD / D≤0.018, 0.657≤DST / F≤1.481.

[0006] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.524≤D / TTL≤0.894 and 2.124≤D / D12≤4.835;

[0007] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 1.632≤F2 / F≤11.155, 0.163≤R3 / F2≤6.26, 0.769≤|F3 / F|≤9.204.

[0008] According to an exemplary embodiment of this application, the optical lens satisfies: -2.687≤F4 / F≤-0.489.

[0009] According to an exemplary embodiment of this application, the optical lens satisfies: 0.208≤|T23*BFL / F4|≤1.394.

[0010] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 0.0006≤T45 / TTL≤0.078, 0.0014≤T45 / F5≤0.184 and -0.194≤T45 / F4≤-0.0008.

[0011] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following: 0.671≤R9 / F5≤2.337, -3.140≤R9 / R10≤-0.262, 0.489≤R9 / F≤2.113, and 0.399≤R11 / F5≤1.023.

[0012] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 2.510≤|F6 / F|≤11.214, 0.036≤R12 / F6≤0.171, 0.274≤R12 / F≤0.570, 0.375≤R11 / F≤0.635, 0.912≤|R11 / R12|≤1.628.

[0013] According to an exemplary embodiment of this application, the optical lens satisfies: 0.212≤F1 / F2≤1.926.

[0014] According to an exemplary embodiment of this application, the optical lens satisfies: 0.338≤|F2 / F3|≤5.285.

[0015] According to an exemplary embodiment of this application, the optical lens satisfies: -2.615≤F4 / F5≤-0.735.

[0016] According to an exemplary embodiment of this application, the optical lens satisfies: 0.078≤T34 / TTL≤0.232;

[0017] According to an exemplary embodiment of this application, the optical lens satisfies the following relationship: 0.015≤|(|R8|-|R9|) / (|R8|+|R9|)|≤0.929; where R8 is the radius of curvature of the second side surface of the fourth lens.

[0018] According to an exemplary embodiment of this application, the optical lens satisfies the following relationship: 0.525≤F5 / F≤1.182.

[0019] According to an exemplary embodiment of this application, the optical lens satisfies at least one of the following relationships: 1.555≤F1 / F≤8.043, 54.559≤(FOV*F) / H≤57.583, 1.734≤TTL / F≤2.899, 0.194≤TTL / H / FOV≤0.370, 1.286≤TTL / DMAX≤1.690, 0.218≤(F*θ) / D≤0.268, 0.128≤D / H / FOV≤0.221, 0.088≤D / H / F≤0.148, 0.0015≤|(HF*θ) / D / H / F ... ) / (F*θ)|≤0.050, 0.052≤BFL / TTL≤0.125, 1.965≤F / H≤3.192, 0.7≤F / ENPD≤0.780, 0.013≤F / ENPD / D≤0.016, 0.773≤DST / F≤1.288, 0.617≤D / TTL≤0.778, 2.499≤D / D12≤4.205, 1.920≤F2 / F≤9.7, 0.192≤R3 / F2≤5.44, 0.905≤|F3 / F|≤8.003, -2.336≤F4 / F≤-0 .575, 0.245≤|T23*BFL / F4|≤1.212, 0.0007≤T45 / TTL≤0.068, 0.0017≤T45 / F5≤0.160, -0.169≤T45 / F4≤-0.0009, 0.789≤R9 / F5 ≤2.032, -2.730≤R9 / R10≤-0.309, 0.576≤R9 / F≤1.837, 0.469≤R11 / F5≤0.889, 2.954≤|F6 / F|≤9.751, 0.042≤R12 / F6≤0.149, 0. 323≤R12 / F≤0.496, 0.441≤R11 / F≤0.552, 0.323≤|R12 / F|≤0.496, 1.095≤|R11 / R12|≤1.415, 0.25≤F1 / F2≤1.675, 0.398≤|F2 / F 3|≤4.596, -2.274≤F4 / F5≤-0.865, 0.091≤T34 / TTL≤0.202, 0.018≤|(|R8|-|R9|) / (|R8|+|R9|)|≤0.808, 0.618≤F5 / F≤1.028.

[0020] Where T34 is the distance between the third and fourth lenses, D12 is the effective aperture of the second side of the sixth lens of the optical lens, F2 is the effective focal length of the second lens, R3 is the radius of curvature of the first side of the second lens, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, T23 is the distance between the second and third lenses, T45 is the distance between the fourth lens and the fifth lens of the optical lens, F5 is the effective focal length of the fifth lens, R9 is the radius of curvature of the first side of the fifth lens of the optical lens, R10 is the radius of curvature of the second side of the fifth lens, R... 11 is the radius of curvature of the first side of the sixth lens of the optical lens, F6 is the effective focal length of the sixth lens of the optical lens, R12 is the radius of curvature of the second side of the sixth lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, DMAX is the maximum aperture of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the effective light transmission aperture on the first side of the first lens, BFL is the back focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and DST is the aperture diameter.

[0021] A second aspect of this application provides an electronic device including 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; wherein 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.

[0022] The optical lens according to the embodiments of this application employs six lenses with optical power, wherein the first lens has positive optical power; the second lens has positive optical power; the third lens has either positive or negative optical power; the fourth lens has negative optical power; the fifth lens has positive optical power, with its first and second sides being convex; and the sixth lens has either positive or negative optical power, with its first side being convex and its second side being concave. The first lens is advantageous for collecting light from a large field of view. By controlling the ratio of the effective focal length of the first lens to the total effective focal length of the optical lens, i.e., 1.322≤F1 / F≤9.25, the focal length of the first lens can be reasonably controlled within a certain range. This is beneficial for adjusting the deflection of central and peripheral rays in each field of view, improving resolution, and facilitating the collection of rays from the peripheral field angles.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application.

[0025] Figures 1 to 25 The diagram shows the structural schematics of the optical lenses according to Embodiments 1 to 25 of this application.

[0026] Figure 26 A schematic diagram of the modulation transfer function (MTF) curve of an optical lens according to Embodiment 17 of this application is shown.

[0027] Figure 27 A schematic diagram of the modulation transfer function (MTF) curve of an optical lens according to Embodiment 23 of this application is shown.

[0028] Figure 28 A schematic diagram of the modulation transfer function (MTF) curve of an optical lens according to Embodiment 24 of this application is shown. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] An optical lens according to an exemplary embodiment of this application may include, for example, six lenses with optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, which are arranged sequentially from the first side to the second side along the optical axis.

[0037] In an exemplary embodiment, the optical lens can be used as, for example, an imaging lens, where a first side of the optical lens can be the object side and a second side can be the image side. Light from the object side can be imaged on the image side. The second side of the optical lens is provided with an imaging surface.

[0038] In an exemplary embodiment, the optical lens can be used as, for example, a projection lens or a lidar transmitter lens. In this case, the second side of the optical lens can be the light source side, and the first side can be the imaging side. Light from the light source side can be imaged on the imaging side. The second side of the optical lens is provided with the light source surface of the optical lens.

[0039] In an exemplary embodiment, the first lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may also be, for example, convex. A convex first side surface provides an aesthetically pleasing appearance and reduces dust accumulation in practical use. A convex second side surface further compresses the beam aperture of the large field of view received by the first side surface, which helps increase light transmission and improve illumination. The second side surface of the first lens may also be concave, allowing incoming light to transition to the next lens element at a smaller angle, thus moving the entrance pupil away from the image-side principal plane and reducing object-side telecentrism. Alternatively, the second side surface of the first lens may be planar, further smoothing the light and reducing lens sensitivity.

[0040] In an exemplary embodiment, the first lens may have positive optical power, and its first side surface may be, for example, a plane, and its second side surface may be, for example, a convex surface. A plane first side surface provides an aesthetically pleasing appearance. A convex second side surface further compresses the beam aperture of the edge field of view received by the object surface, which helps to increase light transmission and improve illumination. Alternatively, the first side surface of the first lens may be concave, which helps to collect light rays from the edge field of view, reduces the angle of incidence, and facilitates aberration balance.

[0041] In an exemplary embodiment, the second lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The convexity of the first side surface of the second lens further converges the light. The convexity of the second side surface further compresses the beam aperture of the edge field of view received by the object surface, which is beneficial for increasing the amount of light transmitted. The second side surface of the second lens may also be concave, which allows the light passing through the second lens to transition smoothly and improves sensitivity.

[0042] In an exemplary embodiment, the third lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The third lens is a positive lens, further converging light and increasing the light throughput entering the front lens group, thus achieving a wider field of view. The convexity of the first side surface of the third lens facilitates the reception and refraction of light passing through the second lens, reducing lens sensitivity. The concaveness of the second side surface of the third lens allows for a smooth transition of light passing through the second lens and improves sensitivity. The second side surface of the third lens can also be planar, which facilitates a smooth transition of light and enhances manufacturability.

[0043] In an exemplary embodiment, the third lens may have positive optical power, and its first side surface may be, for example, planar, and its second side surface may be, for example, convex. The planar first side surface of the third lens facilitates easy fabrication. The convex second side surface allows adjustment of the light divergence angle, which helps to smooth the light path and reduce the sensitivity of the rear optical system. Alternatively, the first side surface of the third lens may be concave, which, in conjunction with the second lens, can diverge the light rays at the edge of the field of view, allowing for a smooth transition of the light rays emitted from the front lens, reducing the degree of deflection, and minimizing aberrations.

[0044] In an exemplary embodiment, the third lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, planar. The concave first side surface of the third lens, in conjunction with the second lens, diverges light rays from the edge of the field of view, reducing the large-angle refraction caused by positive optical power lenses. The planar second side surface of the third lens reduces the difficulty of lens manufacturing and assembly. The second side surface of the third lens can also be concave, allowing for a smoother transition of light rays emitted from the front lens, reducing the degree of deflection, which is beneficial for correcting aberrations in the edge of the field of view and improving image quality. The second side surface of the third lens can also be convex, adjusting the light divergence angle, which helps to smooth the light path and reduce the sensitivity of the rear optical system.

[0045] In an exemplary embodiment, the third lens may have negative optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave, to appropriately diverge the light rays entering through L2 and balance the aberrations generated after passing through L2. The first side surface of the third lens may also be flat, reducing the difficulty of lens processing and assembly.

[0046] In an exemplary embodiment, the fourth lens may have negative optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. The fourth lens is a negative lens, working with the third lens to correct chromatic aberration within the system. The concave first side surface of the fourth lens receives light rays with a low-biased trajectory after passing through the third lens, reducing chromatic aberration and decreasing the angle of incidence, while also contributing to aberration balance. The convex second side surface of the fourth lens further compresses the beam aperture of the edge field of view received by the object surface, reducing the volume of the rear lens assembly. The second side surface of the fourth lens may also be concave, allowing for a smooth transition of light rays emitted from the front lens. Alternatively, the second side surface of the fourth lens may be planar, reducing the difficulty of lens manufacturing and assembly.

[0047] In an exemplary embodiment, the fourth lens may have negative optical power, and its first side surface may be, for example, planar, and its second side surface may be, for example, concave. Having a planar first side surface reduces the difficulty of lens manufacturing and assembly. Having a concave second side surface allows for a smooth transition of light rays emitted from the preceding lens. Alternatively, the first side surface of the fourth lens may be convex, allowing for appropriate divergence of light rays entering the fourth lens and balancing the aberrations produced after the light passes through the third lens.

[0048] In an exemplary embodiment, the fifth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, convex. The first side surface of the fifth lens is convex, which allows light to converge appropriately, further reducing the height of the light within the lens and decreasing the aperture of the rear lens assembly. The second side surface of the fifth lens is convex, which can further compress the beam aperture of the edge field of view received by the object surface, reducing the volume of the rear lens assembly.

[0049] In an exemplary embodiment, the sixth lens may have positive optical power, and its first side surface may be, for example, convex, and its second side surface may be, for example, concave. The first side surface of the sixth lens is convex, which can converge light rays and increase the system illumination. The second side surface of the sixth lens is concave, which can further change the light refraction angle, increase the telecentricity of the principal ray, and converge the light rays onto the image plane.

[0050] In an exemplary embodiment, the sixth lens may have negative optical power, allowing light to enter smoothly into the rear and the light path to transition smoothly, which is beneficial to improving astigmatism and field curvature in imaging and enhancing the resolving power of the optical system. Its first side may be, for example, a convex surface, and its second side may be, for example, a concave surface. Light passing through L5 to reach the image plane has a longer optical path, which is beneficial to achieving small CRA.

[0051] In an exemplary embodiment, the optical lens may further include a filter located between the sixth 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.

[0052] In an exemplary embodiment, the effective focal length F1 of the first lens and the total effective focal length F of the optical lens can satisfy: 1.322≤F1 / F≤9.25. Preferably, 1.555≤F1 / F≤8.043. By controlling this relationship, the focal length of the first lens can be reasonably controlled within a certain range, which is beneficial for adjusting the deflection of the central and peripheral rays in each field of view, improving resolution, and facilitating the collection of rays from the peripheral field angles.

[0053] In an exemplary embodiment, the maximum field of view (FOV) of the optical lens, the total effective focal length (F) of the optical lens, and the image height (H) corresponding to the maximum field of view of the optical lens can satisfy: 46.375 ≤ (FOV*F) / H ≤ 66.221. Preferably, 54.559 ≤ (FOV*F) / H ≤ 57.583. By controlling this relationship, a large field of view and long focal length of the optical lens can be achieved, which helps to improve the center resolution of the lens.

[0054] In an exemplary embodiment, the total optical length (TTL) and F of the optical lens can satisfy: 1.474 ≤ TTL / F ≤ 3.334. Preferably, 1.734 ≤ TTL / F ≤ 2.899. By controlling this relationship, TTL / F can be limited to a reasonable range, which can avoid insufficient spacing between the front and rear lens groups due to an excessively short total optical length, allowing sufficient space to adjust the lens positions and prevent aberrations (such as distortion and coma) from becoming concentrated and difficult to correct; and also avoid the system becoming bloated due to an excessively long total length, thus adapting to the miniaturization requirements of projection lamp lenses.

[0055] In an exemplary embodiment, the TTL, FOV, and H of the optical lens can satisfy: 0.165≤TTL / H / FOV≤0.425. Preferably, 0.194≤TTL / H / FOV≤0.370. By controlling this relationship, the length of the lens can be effectively limited under the same image height and field of view ratio. If the TTL is too long, it directly increases the lens volume, which violates the miniaturization requirements of automotive equipment. If the ratio is too small, the TTL will be too short, resulting in insufficient lens spacing. The optical path connection between the two front positive lenses, the two middle negative lenses, and the two rear positive lenses will be cramped, which will require increasing the lens thickness or complex curved surfaces to compensate for aberrations, indirectly increasing the volume.

[0056] In an exemplary embodiment, the TTL of the optical lens and the maximum aperture DMAX of the optical lens can satisfy: 1.093 ≤ TTL / DMAX ≤ 1.944. Preferably, 1.286 ≤ TTL / DMAX ≤ 1.690. By controlling this relationship, a small TTL / DMAX results in a relatively short overall length and an appropriate aperture, achieving miniaturization while meeting the requirements of high light transmission.

[0057] In an exemplary embodiment, the optical lens's F-axis, the maximum field of view in radians θ, and the effective aperture D on the first side of the first lens can satisfy: 0.185 ≤ (F*θ) / D ≤ 0.308. Preferably, 0.218 ≤ (F*θ) / D ≤ 0.268. By controlling this relationship, D can be matched with F and θ, allowing the first lens to fully receive light from the wide field of view while effectively controlling the lens's front aperture, thus meeting the vehicle headlight's requirements for a wide field of view and small size. If the ratio is too small, D will be too large, resulting in a larger lens size and affecting user-end compatibility; if the ratio is too large, D will be too small, limiting the amount of light entering the lens and reducing the optical efficiency of the headlight lens.

[0058] In an exemplary embodiment, the D, FOV, and H of the optical lens can satisfy: 0.109 ≤ D / H / FOV ≤ 0.254. Preferably, 0.128 ≤ D / H / FOV ≤ 0.221. By controlling this relationship, an appropriate aperture can be determined for a certain image height, which is beneficial for improving the system's high light transmission.

[0059] In an exemplary embodiment, the D, H, and F of the optical lens can satisfy: 0.074 ≤ D / H / F ≤ 0.170. Preferably, 0.088 ≤ D / H / F ≤ 0.148. By controlling this relationship, the synergistic relationship between D, H, and F can be coordinated, balancing beam utilization and structural compactness in scenarios with large relative apertures. When the first side aperture of the first lens is too small, it avoids the edge field of view being blocked due to insufficient first side aperture in scenarios with large image height H (corresponding to a large field of view) or short focal length F (reducing vignetting), ensuring uniform light intake in all areas of the image plane and maintaining consistent image brightness, especially suitable for the edge field of view requirements of large field of view lenses. The upper limit restricts the excessive increase of the first side aperture of the first lens to prevent the lens volume from exceeding the standard.

[0060] In an exemplary embodiment, the H, F, and θ of the optical lens can satisfy: 0.0013≤|(HF*θ) / (F*θ)|≤0.058. Preferably, 0.0015≤|(HF*θ) / (F*θ)|≤0.050. By controlling this relationship, the relative deviation between the actual image height and the ideal image height can be controlled, ensuring the realism of the image and the reliability of the application, limiting excessive deviation, reducing distortion (such as target size stretching, positional shift, and large distortion), ensuring the accuracy of target shape and position restoration in large field-of-view scenes, meeting the accuracy requirements for scene detail capture and target recognition, and improving the scene restoration capability of the lens in practical applications.

[0061] In an exemplary embodiment, the back focal length (BFL) and total telephoto lens (TTL) can satisfy: 0.044 ≤ BFL / TTL ≤ 0.143. Preferably, 0.052 ≤ BFL / TTL ≤ 0.125. By controlling this relationship, it avoids the BFL being too small, which would cause excessive optical power pressure on the last lens element and thus lead to a large off-axis aberration, while ensuring that the BFL is not too long, which would result in an excessively large overall lens size and thus a large space occupation in the vehicle.

[0062] In an exemplary embodiment, the F and H of the optical lens can satisfy: 1.671≤F / H≤3.671. Preferably, 1.965≤F / H≤3.192. By controlling this relationship, aberrations such as field curvature and astigmatism caused by the mismatch between focal length and image height can be reduced. Especially at the edge of a large field of view, it can make the focusing accuracy of light in different areas of the image plane more uniform, thereby improving the overall image clarity.

[0063] In an exemplary embodiment, the F-axis of the optical lens and the entrance pupil diameter (ENPD) of the optical lens can satisfy: 0.595 ≤ F / ENPD ≤ 0.897. Preferably, 0.7 ≤ F / ENPD ≤ 0.780. By controlling this relationship, the FNO parameter can be controlled, which is beneficial to increasing the light transmission and improving the relative illuminance; ensuring that the vehicle headlights have sufficient brightness and provide a clear illumination surface when driving at night.

[0064] In an exemplary embodiment, the F, ENPD, and D of the optical lens can satisfy: 0.011 ≤ F / ENPD / D ≤ 0.018. Preferably, 0.013 ≤ F / ENPD / D ≤ 0.016. By controlling this relationship, the FNO parameter can be controlled, which is beneficial to increasing the light transmittance and improving the relative illuminance; ensuring that the vehicle headlights have sufficient brightness and provide a clear illumination surface when driving at night.

[0065] In an exemplary embodiment, the aperture diameters DST and F can satisfy: 0.657 ≤ DST / F ≤ 1.481. Preferably, 0.773 ≤ DST / F ≤ 1.288. Controlling the ratio of aperture diameter to effective focal length within a suitable range improves light transmission.

[0066] In an exemplary embodiment, the D and TTL of the optical lens can satisfy: 0.524 ≤ D / TTL ≤ 0.894. Preferably, 0.617 ≤ D / TTL ≤ 0.778. By controlling this relationship, the large aperture of the first lens can be controlled, large-angle light can be collected, and the light convergence degree is high under short TTL, which is beneficial to achieving high light transmission.

[0067] In an exemplary embodiment, the effective light-passing aperture D of the first side of the first lens and the effective light-passing aperture D12 of the second side of the sixth lens can satisfy: 2.124 ≤ D / D12 ≤ 4.835. Preferably, 2.499 ≤ D / D12 ≤ 4.205. By controlling this relationship, the D / D12 value is kept within a suitable range, causing the light to contract in a conical shape. For the same chip size, the greater the light contraction, the larger the area that the first lens can collect light from, and the more light is collected, the smaller the FNO value can be.

[0068] In an exemplary embodiment, the effective focal lengths F2 and F of the second lens can satisfy: 1.632 ≤ F2 / F ≤ 11.155. Preferably, 1.920 ≤ F2 / F ≤ 9.7. By controlling this relationship, F2 can be adjusted, avoiding spherical aberration and coma caused by excessively high optical power of the second lens, and reducing the aberration correction pressure of the rear lens group.

[0069] In an exemplary embodiment, the radius of curvature R3 of the first side surface of the second lens and the effective focal length F2 of the second lens can satisfy: 0.163 ≤ R3 / F2 ≤ 6.26. Preferably, 0.192 ≤ R3 / F2 ≤ 5.44. By controlling the radius of curvature of the first side surface of the second lens within a certain range, it helps the second lens to reduce sensitivity while simultaneously collecting light.

[0070] In an exemplary embodiment, the effective focal length F3 of the third lens and the total effective focal length F of the optical lens can satisfy: 0.769 ≤ |F3 / F| ≤ 9.204. Preferably, 0.905 ≤ |F3 / F| ≤ 8.003. By controlling this relationship, the third lens acts as a transition lens between the front and rear groups of optical power. Controlling F3 / F within this range can improve edge resolution of the image while reducing sensitivity.

[0071] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the total effective focal length F of the optical lens can satisfy: -2.687≤F4 / F≤-0.489. Preferably, -2.336≤F4 / F≤-0.575. By controlling this relationship, the optical power of the fourth lens is negative, and by controlling the optical power of the fourth lens to this range, it is ensured that the optical power of the fourth lens is moderate, which can smoothly connect the optical paths of the third and fifth lenses, which is beneficial to reducing sensitivity, and can also work with the rear positive lens to efficiently converge the diverging light from the front group, balancing aberration correction.

[0072] In an exemplary embodiment, the distance T23 between the second and third lenses, the back focal length BFL of the optical lens, and the effective focal length F4 of the fourth lens can satisfy: 0.208 ≤ |T23*BFL / F4| ≤ 1.394. Preferably, 0.245 ≤ |T23*BFL / F4| ≤ 1.212. By controlling this relationship, the small air gap between the second and third lenses is properly matched with the focal length of the fourth lens, allowing light to gradually and smoothly transition to the fifth lens within the system. This is beneficial for achieving a short back focal length while improving image resolution. In particular, when using the third lens, the air gap between the second and third lenses is controlled to control the light path entering the negative, and the focal length of the fourth lens is controlled to control the refraction ability of the light diverging after passing through the third lens. By controlling this relationship within a specified range, image quality can be improved while achieving a short back focal length.

[0073] In an exemplary embodiment, the distance T45 between the fourth lens and the fifth lens and the total optical length TTL of the optical lens can satisfy: 0.0006 ≤ T45 / TTL ≤ 0.078. Preferably, 0.0007 ≤ T45 / TTL ≤ 0.068. By controlling this relationship, the optical power of the fifth lens is positive, converging the diverging light emitted by the fourth lens; by controlling this value within a certain range, the incident angle of light on the first side of the fifth lens is avoided to be too large, thereby improving resolution and reducing sensitivity.

[0074] In an exemplary embodiment, the distance T45 between the fourth lens and the fifth lens and the effective focal length F5 of the fifth lens can satisfy: 0.0014 ≤ T45 / F5 ≤ 0.184. Preferably, 0.0017 ≤ T45 / F5 ≤ 0.160. By controlling this relationship, the optical power of the fifth lens is positive, converging the diverging light emitted from the fourth lens; by controlling this value within a certain range, the incident angle of light on the first side of the fifth lens is avoided to be too large, thereby improving resolution and reducing sensitivity.

[0075] In an exemplary embodiment, the distance T45 between the fourth lens and the fifth lens and the effective focal length F4 of the fourth lens can satisfy: -0.194 ≤ T45 / F4 ≤ -0.0008. Preferably, -0.169 ≤ T45 / F4 ≤ -0.0009. By controlling this relationship, the optical power of the fourth lens is negative, and the light rays diverge after passing through the fourth lens. Controlling this value within a certain range can reduce the incident height of light on subsequent lenses, thereby achieving a smaller optical lens size.

[0076] In an exemplary embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the effective focal length F5 of the fifth lens can satisfy: 0.671≤R9 / F5≤2.337. Preferably, 0.789≤R9 / F5≤2.032. By controlling this relationship, the radius of curvature of the first side surface of the fifth lens is controlled within a certain range, which improves light collection while avoiding aberrations such as spherical aberration and astigmatism caused by an excessively small radius of curvature of the first side surface of the fifth lens. This reduces sensitivity while improving image resolution.

[0077] In an exemplary embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the radius of curvature R10 of the second side surface of the fifth lens can satisfy: -3.140 ≤ R9 / R10 ≤ -0.262. Preferably, -2.730 ≤ R9 / R10 ≤ -0.309. By controlling this relationship, the optical power of the fifth lens is positive, converging the diverging light rays emitted by the fourth lens; by controlling this value within a certain range, the incident angle of light on the first side surface of the fifth lens is avoided to be too large, thereby improving resolution and reducing sensitivity.

[0078] In an exemplary embodiment, the radius of curvature R9 of the first side of the fifth lens and the total effective focal length F of the optical lens can satisfy: 0.489≤R9 / F≤2.113. Preferably, 0.576≤R9 / F≤1.837. By controlling this relationship, the optical power of the fifth lens is positive, which can quickly converge the diverging light rays emitted by the fourth lens to the image plane, thus achieving a smaller total optical length of the system.

[0079] In an exemplary embodiment, the radius of curvature R11 of the first side of the sixth lens and the effective focal length F5 of the fifth lens can satisfy: 0.399≤R11 / F5≤1.023. Preferably, 0.469≤R11 / F5≤0.889. By controlling this relationship and keeping this value within a certain range, the light is incident on the image plane smoothly, reducing the sensitivity of the system.

[0080] In an exemplary embodiment, the effective focal length F6 of the sixth lens and the total effective focal length F of the optical lens can satisfy: 2.510 ≤ |F6 / F| ≤ 11.214. Preferably, 2.954 ≤ |F6 / F| ≤ 9.751. By controlling the focal length value of the sixth lens within a suitable range, it is beneficial to compensate for aberrations generated by the system, thereby improving resolution.

[0081] In an exemplary embodiment, the radius of curvature R12 of the second side surface of the sixth lens and the effective focal length F6 of the sixth lens can satisfy: 0.036≤R12 / F6≤0.171. Preferably, 0.042≤R12 / F6≤0.149. By controlling this relationship, the ratio of the radius of curvature of the second side surface of the sixth lens to the focal length of the sixth lens can be reasonably set, which is beneficial to narrowing the light path entering the last lens and achieving a short back focal length.

[0082] In an exemplary embodiment, the radius of curvature R12 of the second side surface of the sixth lens and the total effective focal length F of the optical lens can satisfy: 0.274 ≤ R12 / F ≤ 0.570. Preferably, 0.323 ≤ R12 / F ≤ 0.496. By controlling this relationship, the ratio of the radius of curvature of the second side surface of the sixth lens to the total focal length of the optical lens can be reasonably set, which is beneficial to narrowing the light path entering the last lens and achieving a short back focal length.

[0083] In an exemplary embodiment, the radius of curvature R11 of the first side surface of the sixth lens and the total effective focal length F of the optical lens can satisfy: 0.375 ≤ R11 / F ≤ 0.635. Preferably, 0.441 ≤ R11 / F ≤ 0.552. By controlling this relationship, the radius of curvature of the first side surface of the sixth lens is reasonably set so that the light rays passing through the fifth lens can be incident perpendicularly to the surface of the first side surface of the sixth lens, avoiding huge aberrations when the light rays pass through the sixth lens and improving the resolving power. In an exemplary embodiment, the radius of curvature R11 of the first side surface of the sixth lens and the radius of curvature R12 of the second side surface of the sixth lens can satisfy: 0.912 ≤ |R11 / R12| ≤ 1.628. Preferably, 1.095 ≤ |R11 / R12| ≤ 1.415. By controlling this relationship, the radii of curvature of the first and second side surfaces of the sixth lens are reasonably matched so that the light rays are incident smoothly on the image plane, reducing the sensitivity of the system.

[0084] In an exemplary embodiment, the effective focal length F1 of the first lens and the effective focal length F2 of the second lens can satisfy: 0.212 ≤ F1 / F2 ≤ 1.926. Preferably, 0.25 ≤ F1 / F2 ≤ 1.675. Both the first and second lenses have positive optical powers and work together to converge light. By controlling this relationship, the optical powers of the two lenses can be reasonably distributed, avoiding excessive light diversion from one lens and improving resolution.

[0085] In an exemplary embodiment, the effective focal length F2 of the second lens and the effective focal length F3 of the third lens can satisfy: 0.338 ≤ |F2 / F3| ≤ 5.285. Preferably, 0.398 ≤ |F2 / F3| ≤ 4.596. By controlling this relationship, the value can be kept within a reasonable range, and the optical power of the second and third lenses can be reasonably allocated, allowing light to pass smoothly through the third lens and enter the fourth lens, thus reducing the sensitivity of the system.

[0086] In an exemplary embodiment, the effective focal length F4 of the fourth lens and the effective focal length F5 of the fifth lens can satisfy: -2.615 ≤ F4 / F5 ≤ -0.735. Preferably, -2.274 ≤ F4 / F5 ≤ -0.865. The optical power of the fourth lens is negative, and the optical power of the fifth lens is positive. By controlling this relationship, the value of F4 / F5 can be controlled within a certain range, which helps the fifth lens to better converge the divergent light passing through the fourth lens and reduce the sensitivity of the system.

[0087] In an exemplary embodiment, the distance T34 between the third lens and the fourth lens and the total optical length TTL of the optical lens can satisfy: 0.078 ≤ T34 / TTL ≤ 0.232. Preferably, 0.091 ≤ T34 / TTL ≤ 0.202. By controlling this relationship, the distance between the third lens and the fourth lens can be increased to prevent light from entering the fourth lens from the third lens at a large angle; at the same time, the distance between the fourth lens and the fifth lens can be decreased to further reduce sensitivity.

[0088] In an exemplary embodiment, the radius of curvature R8 of the second side surface of the fourth lens and the radius of curvature R9 of the first side surface of the fifth lens can satisfy: 0.015≤|(|R8|-|R9|) / (|R8|+|R9|)|≤0.929. Preferably, 0.018≤|(|R8|-|R9|) / (|R8|+|R9|)|≤0.808. By controlling this relationship, the surface shape of the light-emitting surface of the fourth lens and the light-incoming surface of the fifth lens can be reasonably controlled, reducing the light reversal angle between the two surfaces, making the light transition smooth, reducing sensitivity while improving resolution.

[0089] In an exemplary embodiment, the effective focal length F5 of the fifth lens and the total effective focal length F of the optical lens can satisfy: 0.525 ≤ F5 / F ≤ 1.182. Preferably, 0.618 ≤ F5 / F ≤ 1.028. The fifth lens is a positive lens. By controlling this relationship, F5 can be kept within a suitable range, minimizing sensitivity when light is focused onto the sixth lens. If F5 is too small, the fifth lens will focus too strongly, easily causing rapid light convergence, exacerbating spherical aberration and coma, and increasing the correction burden on the sixth lens. If F5 is too large, its focusing ability is insufficient, making it difficult to receive light from the fourth lens and effectively guide it to the sixth lens, potentially leading to optical path divergence and blurred imaging at the edges of a large field of view. Simultaneously, within this suitable range, it is beneficial for rapid light collection and achieving a short back focal length.

[0090] 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 of the first lens to the imaging plane or the light source plane; the back focal length (BFL) of the optical lens refers to the axial distance from the second side of the sixth lens to the imaging plane or the light source plane; and the maximum field of view (FOV) of the optical lens is related to the image height (H), which refers to the field of view corresponding to the image height (H).

[0091] 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 six lenses are described as an example in the embodiments, the optical lens is not limited to including six lenses. If desired, the optical lens may also include other numbers of lenses.

[0092] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.

[0093] Example 1

[0094] The following is for reference Figure 1 Describes an optical lens according to Embodiment 1 of this application. For example... 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, and a sixth lens L6. An aperture stop STO can be positioned between the third lens L3 and the fourth lens L4. The first side surface S3 and the second side surface S4 of the second lens L2 each have at least one inflection point.

[0095] The first lens L1 has positive optical power, its first side surface S1 is convex, and its second side surface S2 is concave.

[0096] The second lens L2 has positive optical power, with its first side surface S3 being convex and its second side surface S4 being concave.

[0097] The third lens L3 has positive optical power, with its first side surface S5 being convex and its second side surface S6 being concave.

[0098] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface S8 is concave.

[0099] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0100] The sixth lens L6 has positive optical power, with its first side surface S11 being convex and its second side surface S12 being concave.

[0101] An image plane (IMA) is provided on the second side of the optical lens. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged onto the IMA. When the IMA is the light source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object. Table 1 shows the basic parameters of the optical lens of Embodiment 1.

[0102] Table 1

[0103]

[0104]

[0105] In Embodiment 1, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. The surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical surface formula:

[0106]

[0107] 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 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for the aspherical surfaces S1, S3, S4, S9, S10 and S12 in Example 1.

[0108] Table 2

[0109] Face number k A4 A6 A8 S1 0.264 1.202E-06 -1.058E-09 2.842E-12 S3 -0.839 -1.069E-06 -4.931E-09 -1.849E-11 S4 -11.209 4.876E-06 -2.091E-08 -1.296E-12 S9 -2.545 3.141E-05 -5.131E-08 -2.299E-11 S10 1.268 2.025E-05 -7.053E-08 1.492E-10 S12 0.000 1.632E-04 -3.708E-06 7.706E-08

[0110] The optical lens of Example 1 has an MTF value exceeding 0.2 at a spatial frequency of 25 lp / mm (25 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 1 has good imaging quality or light projection effect.

[0111] Example 2

[0112] The following is for reference Figure 2 Describes an optical lens according to Embodiment 2 of this application. For example... Figure 2 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the second side surface S2 of the first lens L1 is a plane. Table 3 shows the basic parameters of the optical lens of Embodiment 2.

[0113] Table 3

[0114]

[0115]

[0116] In Embodiment 2, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 4 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Embodiment 2.

[0117] Table 4

[0118] Face number k A4 A6 A8 S1 -0.022 2.984E-07 -3.664E-10 1.125E-12 S3 1.232 -8.904E-07 -1.089E-09 -1.217E-11 S4 -44.808 6.830E-06 -1.729E-08 1.286E-12 S9 -3.445 2.151E-05 -3.855E-08 -1.465E-10 S10 1.647 2.016E-05 -6.794E-08 2.520E-10 S12 0.000 2.041E-04 -6.575E-06 1.245E-07

[0119] The optical lens of Example 2 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) in its edge field of view. Therefore, the optical lens given in Example 2 has good imaging quality or light projection effect.

[0120] Example 3

[0121] The following is for reference Figure 3 Describes an optical lens according to Embodiment 3 of this application. For example... Figure 3 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the second side surface S2 of the first lens L1 is convex, while only the second side surface S4 of the second lens L2 has at least one inflection point. Table 5 shows the basic parameter table of the optical lens of Embodiment 3.

[0122] Table 5

[0123]

[0124]

[0125] In Embodiment 3, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 6 provides the conic coefficient k and higher-order coefficients A4, A6, and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10, and S12 in Embodiment 3.

[0126] Table 6

[0127] Face number k A4 A6 A8 S1 -6.063 -5.278E-07 1.947E-11 -1.994E-12 S3 1.224 -1.212E-06 -1.271E-09 -7.633E-12 S4 -63.871 5.042E-06 -1.936E-08 7.243E-12 S9 -2.246 2.166E-05 4.437E-09 -3.530E-10 S10 2.065 1.968E-05 1.829E-08 -1.465E-10 S12 0.000 2.379E-04 -6.831E-06 1.486E-07

[0128] The optical lens of Example 3 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens given in Example 3 has good imaging quality or light projection effect.

[0129] Example 4

[0130] The following is for reference Figure 4 Describes an optical lens according to Embodiment 4 of this application. For example... Figure 4 As shown, the main difference between this embodiment and embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the second side surface S6 of the third lens L3 is a plane. Table 7 shows the basic parameter table of the optical lens of embodiment 4.

[0131] Table 7

[0132] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 45.776 9.000 1.520 64.200 S2 129.764 0.300 S3 60.073 8.000 1.490 70.440 S4 111.267 6.000 S5 32.100 7.000 1.490 70.440 S6 infinity 5.000 STO infinity 4.477 S7 -61.141 5.182 1.760 27.530 S8 20.764 2.000 S9 26.777 7.000 1.620 60.370 S10 -27.432 0.100 S11 16.246 10.847 1.740 44.900 S12 14.824 4.000 IMA / /

[0133] In Embodiment 4, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 8 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Embodiment 4.

[0134] Table 8

[0135] Face number k A4 A6 A8 S1 -0.173 4.626E-07 -1.105E-09 5.536E-13 S3 1.009 -9.340E-07 -2.412E-09 -8.362E-12 S4 -59.088 8.141E-06 -1.562E-08 1.173E-12 S9 -1.844 3.208E-05 -2.073E-08 -3.214E-10 S10 2.046 3.265E-05 -4.815E-08 1.043E-10 S12 0.000 2.209E-04 -6.629E-06 1.431E-07

[0136] The optical lens of Example 4 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens given in Example 4 has good imaging quality or light projection effect.

[0137] Example 5

[0138] The following is for reference Figure 5Describes an optical lens according to Embodiment 5 of this application. For example... Figure 5 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the first side surface S7 of the fourth lens L4 is flat; and the first side surface S1 of the first lens L1 and the second side surface S4 of the second lens L2 have at least one inflection point. Table 9 shows the basic parameter table of the optical lens of Embodiment 5.

[0139] Table 9

[0140] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 217.351 9.572 1.520 64.200 S2 -136.903 0.370 S3 53.975 7.987 1.490 70.440 S4 91.929 5.398 S5 22.669 8.000 1.490 70.440 S6 78.807 4.935 STO infinity 4.421 S7 infinity 4.297 1.760 27.530 S8 16.774 2.232 S9 19.592 6.810 1.620 60.370 S10 -63.352 0.066 S11 18.654 10.816 1.740 44.900 S12 16.851 3.800 IMA / /

[0141] In Embodiment 5, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 10 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Embodiment 5.

[0142] Table 10

[0143]

[0144]

[0145] The optical lens of Example 5 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) in its edge field of view. Therefore, the optical lens given in Example 5 has good imaging quality or light projection effect.

[0146] Example 6

[0147] The following is for reference Figure 6 Describes an optical lens according to Embodiment 6 of this application. For example... Figure 6 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the second side surface S2 of the first lens L1 is concave, while the first side surface S7 of the fourth lens L4 is convex. Table 11 shows the basic parameters of the optical lens of Embodiment 6.

[0148] Table 11

[0149] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 106.123 9.000 1.520 64.200 S2 -553.604 0.300 S3 50.354 8.000 1.490 70.440 S4 86.508 6.000 S5 31.164 7.000 1.490 70.440 S6 209.641 5.000 STO infinity 4.477 S7 162.540 4.810 1.760 27.530 S8 19.060 2.000 S9 25.995 7.000 1.620 60.370 S10 -47.867 0.100 S11 18.031 10.847 1.740 44.900 S12 14.944 4.897 IMA / /

[0150] In Embodiment 6, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 12 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Embodiment 6.

[0151] Table 12

[0152] Face number k A4 A6 A8 S1 -9.416 -1.303E-06 -1.391E-10 -2.335E-12 S3 0.481 -9.731E-07 -1.266E-09 -7.039E-12 S4 -38.553 6.529E-06 -1.621E-08 4.537E-12 S9 -1.922 2.603E-05 6.083E-08 -1.594E-10 S10 4.174 1.913E-05 -3.393E-08 9.932E-11 S12 0.0000 1.2413E-04 -2.5284E-06 6.3317E-08

[0153] The optical lens of Example 6 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 6 has good imaging quality or light projection effect.

[0154] Example 7

[0155] The following is for reference Figure 7 Describes an optical lens according to Embodiment 7 of this application. For example... Figure 7 As shown, the main difference between this embodiment and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different. Table 13 shows the basic parameters of the optical lens of Embodiment 7.

[0156] Table 13

[0157] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 52.588 9.000 1.520 64.200 S2 155.030 0.300 S3 54.643 8.000 1.490 70.440 S4 97.309 6.000 S5 30.802 7.000 1.490 70.440 S6 374.994 5.000 STO infinity 4.477 S7 -71.824 5.182 1.760 27.530 S8 22.275 2.000 S9 24.651 7.000 1.620 60.370 S10 -27.401 0.100 S11 17.008 10.847 1.740 44.900 S12 13.832 4.000 IMA / /

[0158] In Embodiment 7, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 14 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Embodiment 7.

[0159] Table 14

[0160] Face number k A4 A6 A8 S1 -0.109 4.360E-07 -1.054E-09 1.561E-12 S3 -0.773 -1.078E-06 -3.762E-09 -1.383E-11 S4 -39.811 6.135E-06 -1.805E-08 -1.965E-13 S9 -2.061 2.957E-05 -5.819E-08 -8.698E-11 S10 0.767 2.897E-05 -7.972E-08 6.241E-11 S12 0.000 2.089E-04 -6.988E-06 1.541E-07

[0161] The optical lens of Example 7 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 7 has good imaging quality or light projection effect.

[0162] Example 8

[0163] The following is for reference Figure 8 Describes an optical lens according to Embodiment 8 of this application. For example... Figure 8 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the first side surface S1 of the first lens L1 is a plane and the second side surface S2 is a convex surface. Table 15 shows the basic parameters of the optical lens of Embodiment 8.

[0164] Table 15

[0165]

[0166]

[0167] In Example 8, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 16 provides the conic coefficient k and the higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S3, S4, S9, S10 and S12 in Example 8.

[0168] Table 16

[0169] Face number k A4 A6 A8 S3 -2.237 -2.184E-06 -4.544E-09 -9.012E-12 S4 -40.372 4.589E-06 -2.186E-08 8.231E-12 S9 -3.466 2.561E-05 -7.174E-08 -5.934E-11 S10 1.230 2.791E-05 -5.844E-08 9.206E-11 S12 0.000 1.470E-04 -3.579E-06 8.564E-08

[0170] The optical lens of Example 8 has an MTF value exceeding 0.45 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens provided in Example 8 has good imaging quality or light projection effect.

[0171] Example 9

[0172] The following is for reference Figure 9 Describes an optical lens according to Embodiment 9 of this application. For example... Figure 9 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the first side surface S1 of the first lens L1 is concave and the second side surface S2 is convex. Table 17 shows the basic parameters of the optical lens of Embodiment 9.

[0173] Table 17

[0174]

[0175]

[0176] In Example 9, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 18 provides the conic coefficient k and the higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S3, S4, S9, S10 and S12 in Example 9.

[0177] Table 18

[0178] Face number k A4 A6 A8 S3 -2.193 -2.686E-06 -8.857E-09 -1.371E-11 S4 -34.822 1.631E-06 -2.626E-08 1.071E-11 S9 -3.495 2.915E-05 -4.443E-08 -1.346E-10 S10 1.560 2.242E-05 -2.292E-08 1.030E-11 S12 0.000 1.376E-04 -3.231E-06 8.158E-08

[0179] The optical lens of Example 9 has an MTF value exceeding 0.3 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens provided in Example 9 has good imaging quality or light projection effect.

[0180] Example 10

[0181] The following is for reference Figure 10 Describes an optical lens according to Embodiment 10 of this application. For example... Figure 10 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the first side surface S5 of the third lens L3 is flat and the second side surface S6 is convex; and the second side surface S8 of the fourth lens L4 is convex. Table 19 shows the basic parameters of the optical lens of Embodiment 10.

[0182] Table 19

[0183] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 96.820 9.000 1.570 63.120 S2 infinity 0.300 S3 48.661 8.000 1.490 57.440 S4 75.905 3.000 S5 2000.000 9.000 1.740 44.850 S6 -111.062 9.000 STO infinity 4.477 S7 -28.192 5.182 1.640 34.610 S8 -353.257 1.000 S9 39.220 11.000 1.610 60.960 S10 -23.905 0.100 S11 13.200 10.848 1.490 70.410 S12 10.813 5.000 IMA / /

[0184] In Embodiment 10, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 20 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Embodiment 10.

[0185] Table 20

[0186] Face number k A4 A6 A8 S1 4.161 -1.585E-06 -2.637E-09 -4.647E-13 S3 0.123 -1.894E-06 -3.224E-09 -8.386E-12 S4 -35.022 7.440E-06 -2.544E-08 1.205E-11 S9 -6.342 2.106E-05 -2.534E-08 -2.974E-11 S10 0.240 3.714E-05 -4.645E-08 7.543E-11 S12 4.161 -1.585E-06 -2.637E-09 -4.647E-13

[0187] The optical lens of Example 10 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens provided in Example 10 has good imaging quality or light projection effect.

[0188] Example 11

[0189] The following is for reference Figure 11 Describes an optical lens according to Embodiment 11 of this application. For example... Figure 11 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is flat; the first side surface S5 of the third lens L3 is concave and the second side surface S6 is convex; and the second side surface S8 of the fourth lens L4 is convex. Table 21 shows the basic parameters of the optical lens of Embodiment 11.

[0190] Table 21

[0191] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 108.639 9.000 1.600 61.380 S2 7001.915 0.300 S3 62.187 8.000 1.490 57.440 S4 118.094 3.000 S5 -360.000 9.000 1.740 44.850 S6 -91.152 9.000 STO infinity 4.477 S7 -28.792 5.182 1.510 57.760 S8 -353.257 1.000 S9 37.654 11.000 1.590 62.250 S10 -24.345 0.100 S11 12.635 10.847 1.490 70.410 S12 10.650 5.000 IMA / /

[0192] In Example 11, the first side surface S1 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the second side surface S12 of the sixth lens L6 are all aspherical surfaces. Table 22 provides the conic coefficient k and higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S1, S3, S4, S9, S10 and S12 in Example 11.

[0193] Table 22

[0194]

[0195]

[0196] The optical lens of Example 11 has an MTF value exceeding 0.15 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 11 has good imaging quality or light projection effect.

[0197] Example 12

[0198] The following is for reference Figure 12 Describes an optical lens according to Embodiment 12 of this application. For example... Figure 12 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is flat; the second side surface S4 of the second lens L2 is convex; the third lens L3 has negative optical power; and the first side surface S7 of the fourth lens L4 is convex. Table 23 shows the basic parameters of the optical lens of Embodiment 12.

[0199] Table 23

[0200] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 48.604 8.588 1.560 64.240 S2 6687.832 0.300 S3 48.280 10.000 1.520 66.820 S4 -381.514 2.820 S5 260.919 3.000 1.760 27.580 S6 51.089 5.268 STO infinity 6.571 S7 193.578 3.000 1.760 27.580 S8 32.155 4.988 S9 55.720 12.670 1.620 60.320 S10 -32.487 0.851 S11 18.825 11.218 1.740 44.850 S12 15.206 6.707 IMA / /

[0201] In Example 12, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 24 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 12.

[0202] Table 24

[0203] Face number k A4 A6 A8 A10 S3 -4.180 2.505E-06 -7.168E-09 -2.565E-12 -1.208E-14 S4 -38.000 7.201E-07 -7.730E-09 -3.441E-12 -2.373E-15 S9 -15.605 1.619E-05 -3.377E-08 2.643E-11 0.000E+00 S10 -0.373 9.379E-06 -2.314E-08 1.170E-11 0.000E+00

[0204] The optical lens of Example 12 has an MTF value exceeding 0.2 at a spatial frequency of 16 lp / mm (16 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 12 has good imaging quality or light projection effect.

[0205] Example 13

[0206] The following is for reference Figure 13 Describes an optical lens according to Embodiment 13 of this application. For example... Figure 13 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the third lens L3 has negative optical power; and the first side surface S5 of the third lens L3 is flat. Table 25 shows the basic parameters of the optical lens of Embodiment 13.

[0207] Table 25

[0208] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 43.869 9.000 1.650 55.730 S2 -1925.167 0.300 S3 46.416 10.000 1.590 62.130 S4 251.390 2.943 S5 11235.652 3.000 1.760 27.580 S6 46.499 5.321 STO infinity 2.961 S7 -167.144 3.000 1.760 27.580 S8 37.961 4.999 S9 48.871 12.938 1.620 60.320 S10 -29.312 0.200 S11 19.268 10.818 1.740 44.850 S12 15.824 8.360 IMA / /

[0209] In Example 13, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 26 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 13.

[0210] Table 26

[0211] Face number k A4 A6 A8 A10 S3 -2.333 2.141E-06 -8.264E-09 -3.297E-12 -6.904E-15 S4 -38.000 -9.372E-07 -8.729E-09 -4.322E-12 2.608E-15 S9 -13.128 1.305E-05 -2.677E-08 1.823E-11 0.000E+00 S10 -0.346 9.520E-06 -1.071E-08 8.275E-13 0.000E+00

[0212] The optical lens of Example 13 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 13 has good imaging quality or light projection effect.

[0213] Example 14

[0214] The following is for reference Figure 14 Describes an optical lens according to Embodiment 14 of this application. For example... Figure 14As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different, and the third lens L3 has negative optical power, and the first side surface S5 of the third lens L3 is concave. Table 27 shows the basic parameters of the optical lens of Embodiment 14.

[0215] Table 27

[0216]

[0217]

[0218] In Example 14, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 28 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 14.

[0219] Table 28

[0220] Face number k A4 A6 A8 A10 S3 -3.089 1.487E-06 -2.994E-09 -9.480E-12 -9.980E-15 S4 -38.000 -1.365E-06 -9.621E-09 1.893E-12 -6.526E-15 S9 -8.533 1.259E-05 -3.034E-08 2.758E-11 0.000E+00 S10 -0.073 1.030E-05 -1.500E-08 1.561E-11 0.000E+00

[0221] The optical lens of Example 14 has an MTF value exceeding 0.3 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens given in Example 14 has good imaging quality or light projection effect.

[0222] Example 15

[0223] The following is for reference Figure 15 Describes an optical lens according to Embodiment 15 of this application. For example... Figure 15 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is flat; the third lens L3 has negative optical power; the first side surface S5 of the third lens L3 is concave; and the first side surface S7 of the fourth lens L4 is flat. Table 29 shows the basic parameters of the optical lens of Embodiment 15.

[0224] Table 29

[0225]

[0226]

[0227] In Example 15, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 30 provides the conic coefficient k and the higher-order coefficients A4, A6, A8, A10 and A12 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 15.

[0228] Table 30

[0229] Face number k A4 A6 A8 A10 A12 S3 -3.483 2.025E-06 -6.314E-09 -8.613E-12 -2.644E-14 2.244E-17 S4 -38.000 -2.725E-06 -1.404E-08 -5.828E-13 9.529E-15 -7.542E-18 S9 -9.022 1.180E-05 -2.981E-08 2.897E-11 0.000E+00 0.000E+00 S10 -0.100 9.087E-06 -1.416E-08 9.311E-12 0.000E+00 0.000E+00

[0230] The optical lens of Example 15 has an MTF value exceeding 0.2 at a spatial frequency of 25 lp / mm (25 line pairs / mm) at its edge field of view. Therefore, the optical lens provided in Example 15 has good imaging quality or light projection effect.

[0231] Example 16

[0232] The following is for reference Figure 16 Describes an optical lens according to Embodiment 16 of this application. For example... Figure 16 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is flat; the third lens L3 has negative optical power; and the first side surface S5 of the third lens L3 is concave. Table 31 shows the basic parameters of the optical lens of Embodiment 16.

[0233] Table 31

[0234] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 44.606 8.055 1.670 51.830 S2 2218.712 0.300 S3 39.724 10.000 1.620 59.890 S4 172.297 2.553 S5 -856.507 3.000 1.760 27.580 S6 28.407 6.695 STO infinity 4.151 S7 -1134.913 3.000 1.760 27.580 S8 51.172 2.000 S9 42.272 13.524 1.620 60.320 S10 -28.596 0.200 S11 17.895 10.134 1.740 44.850 S12 14.693 9.018 IMA / /

[0235] In Example 16, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 32 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 16.

[0236] Table 32

[0237]

[0238]

[0239] The optical lens of Example 16 has an MTF value exceeding 0.35 at a spatial frequency of 25 lp / mm (25 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 16 has good imaging quality or light projection effect.

[0240] Example 17

[0241] The following is for reference Figure 17 Describes an optical lens according to Embodiment 17 of this application. For example... Figure 17 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the third lens L3 has negative optical power; the first side surface S5 of the third lens L3 is concave; and the second side surface S6 is flat. Table 33 shows the basic parameters of the optical lens of Embodiment 17.

[0242] Table 33

[0243] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 56.175 9.078 1.570 63.570 S2 -1392.794 0.300 S3 46.374 10.000 1.490 70.320 S4 246.565 2.324 S5 -200.114 4.000 1.760 27.580 S6 2397.106 5.561 STO infinity 6.954 S7 -131.736 3.000 1.760 27.580 S8 35.557 3.913 S9 43.093 13.201 1.620 60.320 S10 -30.671 0.200 S11 18.791 11.778 1.740 44.850 S12 14.922 7.718 IMA / /

[0244] In Example 17, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 34 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 17.

[0245] Table 34

[0246] Face number k A4 A6 A8 A10 S3 -3.937 1.311E-06 -9.133E-09 -1.934E-12 -1.367E-14 S4 -38.000 -5.243E-06 -8.635E-09 -1.707E-12 0.000E+00 S9 -12.102 1.481E-05 -3.552E-08 3.395E-11 0.000E+00 S10 -0.253 8.075E-06 -1.505E-08 8.866E-12 0.000E+00

[0247] like Figure 26 As shown, the edge field of view of the optical lens of Example 17 has an MTF value exceeding 0.15 at a spatial frequency of 32 lp / mm (32 line pairs / mm). Therefore, the optical lens given in Example 17 has good imaging quality or light projection effect.

[0248] Example 18

[0249] The following is for reference Figure 18 Describes an optical lens according to Embodiment 18 of this application. For example... Figure 18 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is flat; the third lens L3 has negative optical power; and the first side surface S5 of the third lens L3 is concave and the second side surface S6 is convex. Table 35 shows the basic parameters of the optical lens of Embodiment 18.

[0250] Table 35

[0251] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 47.658 8.089 1.610 60.810 S2 6687.832 0.300 S3 47.7789 10.000 1.500 68.760 S4 181.217 4.322 S5 -141.389 4.000 1.760 27.580 S6 -349.106 7.627 STO infinity -0.632 S7 -71.590 3.000 1.760 27.580 S8 34.308 4.385 S9 40.783 15.377 1.620 60.320 S10 -28.899 0.200 S11 19.711 12.741 1.740 44.850 S12 15.458 6.748 IMA / /

[0252] In Example 18, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 36 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 18.

[0253] Table 36

[0254] Face number k A4 A6 A8 A10 S3 -4.354 1.044E-06 -9.002E-09 5.170E-13 -1.372E-14 S4 -38.000 -6.269E-06 -7.689E-09 -8.239E-13 0.000E+00 S9 -9.921 1.392E-05 -3.355E-08 3.132E-11 0.000E+00 S10 -0.109 9.533E-06 -1.283E-08 1.005E-11 0.000E+00

[0255] The optical lens of Example 18 has an MTF value exceeding 0.2 at a spatial frequency of 25 lp / mm (25 line pairs / mm) at its edge field of view. Therefore, the optical lens given in Example 18 has good imaging quality or light projection effect.

[0256] Example 19

[0257] The following is for reference Figure 19 Describes an optical lens according to Embodiment 19 of this application. For example... Figure 19 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the third lens L3 has negative optical power; the first side surface S5 of the third lens L3 is concave and the second side surface S6 is convex; and the second side surface S8 of the fourth lens L4 is flat. Table 37 shows the basic parameters of the optical lens of Embodiment 19.

[0258] Table 37

[0259]

[0260]

[0261] In Example 19, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 38 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 19.

[0262] Table 38

[0263] Face number k A4 A6 A8 A10 S3 -2.600 -7.772E-08 -8.972E-09 9.313E-12 -1.429E-14 S4 -38.000 -6.587E-06 -4.945E-09 -1.628E-12 0.000E+00 S9 -21.321 3.802E-06 -1.960E-08 1.703E-11 0.000E+00 S10 -0.382 1.141E-05 -1.499E-08 1.191E-11 0.000E+00

[0264] The optical lens of Example 19 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens given in Example 19 has good imaging quality or light projection effect.

[0265] Example 20

[0266] The following is for reference Figure 20 Describes an optical lens according to Embodiment 20 of this application. For example... Figure 20 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the third lens L3 has negative optical power; the first side surface S5 of the third lens L3 is concave and the second side surface S6 is convex; and the second side surface S8 of the fourth lens L4 is convex. Table 39 shows the basic parameters of the optical lens of Embodiment 20.

[0267] Table 39

[0268]

[0269]

[0270] In Embodiment 20, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 40 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Embodiment 20.

[0271] Table 40

[0272] Face number k A4 A6 A8 A10 S3 -8.075 8.386E-08 -9.847E-09 6.919E-12 -1.387E-14 S4 -38.000 -9.129E-06 -5.872E-09 9.563E-13 0.000E+00 S9 -13.478 4.758E-06 -1.906E-08 1.437E-11 0.000E+00 S10 -0.416 1.099E-05 -1.397E-08 8.998E-12 0.000E+00

[0273] The optical lens of Example 20 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens provided in Example 20 has good imaging quality or light projection effect.

[0274] Example 21

[0275] The following is for reference Figure 21 Describes an optical lens according to Embodiment 21 of this application. For example... Figure 21 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S1 of the first lens L1 is flat and the second side surface S2 is convex; the third lens L3 has negative optical power; and the first side surface S7 of the fourth lens L4 is convex. Table 41 shows the basic parameters of the optical lens of Embodiment 21.

[0276] Table 41

[0277] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -11349.220 6.261 1.540 65.340 S2 -76.744 0.300 S3 42.873 10.000 1.510 68.340 S4 4991.420 5.593 S5 34.888 5.000 1.760 27.580 S6 24.791 7.636 STO infinity 0.302 S7 76.835 3.000 1.760 27.580 S8 28.061 3.000 S9 70.586 12.413 1.580 62.680 S10 -26.452 4.272 S11 17.374 9.902 1.670 52.820 S12 14.675 5.321 IMA / /

[0278] In Example 21, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 42 provides the conic coefficient k and the higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 21.

[0279] Table 42

[0280]

[0281]

[0282] The optical lens of Example 21 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) at its edge field of view. Therefore, the optical lens provided in Example 21 has good imaging quality or light projection effect.

[0283] Example 22

[0284] The following is for reference Figure 22 Describes an optical lens according to Embodiment 22 of this application. For example... Figure 22 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S1 of the first lens L1 is concave and the second side surface S2 is convex; the third lens L3 has negative optical power; and the first side surface S7 of the fourth lens L4 is convex. Table 43 shows the basic parameter table of the optical lens of Embodiment 22.

[0285] Table 43

[0286] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 -900.000 7.000 1.610 60.870 S2 -72.423 0.300 S3 43.017 10.000 1.550 64.920 S4 3275.076 4.637 S5 37.757 5.000 1.760 27.580 S6 25.708 7.137 STO infinity 0.100 S7 81.153 3.000 1.760 27.580 S8 27.976 3.000 S9 70.375 12.737 1.550 64.520 S10 -25.780 6.055 S11 18.326 9.544 1.740 44.850 S12 15.508 4.491 IMA / /

[0287] In Example 22, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 44 provides the conic coefficient k and the higher-order coefficients A4, A6 and A8 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 22.

[0288] Table 44

[0289] Face number k A4 A6 A8 S3 -4.270 7.736E-07 -1.225E-08 -1.966E-11 S4 -38.000 -2.299E-06 -1.618E-08 8.869E-13 S9 -28.224 2.271E-05 -1.586E-08 2.253E-11 S10 -0.514 1.011E-05 -1.514E-08 -1.832E-11

[0290] The optical lens of Example 22 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens provided in Example 22 has good imaging quality or light projection effect.

[0291] Example 23

[0292] The following is for reference Figure 23 Describes an optical lens according to Embodiment 23 of this application. For example... Figure 23 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S4 of the second lens L2 is convex; the third lens L3 has negative optical power; the first side surface S7 of the fourth lens L4 is convex; and the sixth lens L6 has negative optical power. Table 45 shows the basic parameters of the optical lens of Embodiment 23.

[0293] Table 45

[0294] Face number radius of curvature Thickness / Distance Refractive index Abbe number S1 44.221 7.754 1.520 64.200 S2 189.950 0.300 S3 51.104 10.000 1.490 70.030 S4 -889.420 5.117 S5 404.938 3.000 1.760 27.530 S6 61.340 -9.224 STO infinity 20.454 S7 99.821 3.000 1.760 27.530 S8 31.307 4.790 S9 37.213 11.214 1.620 60.370 S10 -33.300 0.478 S11 18.536 10.125 1.740 44.900 S12 13.100 8.994 IMA / /

[0295] In Example 23, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 46 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S3, S4, S9 and S10 in Example 23.

[0296] Table 46

[0297] Face number k A4 A6 A8 A10 S3 -6.393 3.075E-06 -5.820E-09 -7.585E-12 1.923E-15 S4 -38.000 1.055E-06 -8.031E-09 7.636E-13 0.000E+00 S9 -8.045 1.655E-05 -3.129E-08 2.236E-11 0.000E+00 S10 -0.438 7.441E-06 -1.527E-08 6.389E-12 0.000E+00

[0298] like Figure 27 As shown, the MTF value of the edge field of view of the optical lens of Example 23 exceeds 0.2 at a spatial frequency of 32 lp / mm (32 line pairs / mm). Therefore, the optical lens given in Example 23 has good imaging quality or light projection effect.

[0299] Example 24

[0300] The following is for reference Figure 24 Describes an optical lens according to Embodiment 24 of this application. For example... Figure 24 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the second side surface S4 of the second lens L2 is convex; the third lens L3 has negative optical power; the first side surface S5 of the third lens L3 is concave; and the first side surface S7 of the fourth lens L4 is convex. Table 47 shows the basic parameter table of the optical lens of Embodiment 24.

[0301] Table 47

[0302]

[0303]

[0304] In Example 24, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, the first side surface S9 and the second side surface S10 of the fifth lens L5, and the first side surface S11 of the sixth lens are all aspherical surfaces. Table 48 provides the conic coefficient k and the higher-order coefficients A4, A6, A8, A10 and A12 that can be used for each aspherical surface S1, S2, S3, S4, S9, S10 and S11 in Example 24.

[0305] Table 48

[0306] Face number k A4 A6 A8 A10 A12 S1 -0.593 -9.292E-07 -4.580E-10 -1.147E-12 1.780E-15 -7.831E-19 S2 -34.350 7.209E-07 6.709E-10 1.697E-12 1.032E-15 0.000E+00 S3 134.000 1.369E-06 -6.599E-09 -3.896E-12 1.923E-15 0.000E+00 S4 -142.580 1.357E-06 -6.892E-09 5.630E-12 0.000E+00 0.000E+00 S9 -4.004 2.033E-05 -2.696E-08 1.283E-11 0.000E+00 0.000E+00 S10 -0.749 9.056E-06 -1.630E-08 6.887E-12 0.000E+00 0.000E+00 S11 -0.012 -5.290E-06 4.027E-08 -2.863E-10 -8.968E-14 0.000E+00

[0307] like Figure 28 As shown, the edge field of view of the optical lens of Example 24 has an MTF value exceeding 0.15 at a spatial frequency of 20 lp / mm (20 line pairs / mm). Therefore, the optical lens given in Example 24 has good imaging quality or light projection effect.

[0308] Example 25

[0309] Reference Figure 25 Describes an optical lens according to Embodiment 25 of this application. For example... Figure 25 As shown, the main differences between this embodiment and Embodiment 1 are: the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S2 of the first lens L1 is convex; the third lens L3 has negative optical power; the first side surface S5 of the third lens L3 is concave; and the first side surface S7 of the fourth lens L4 is convex. Table 49 shows the basic parameter table of the optical lens of Embodiment 25.

[0310] Table 49

[0311]

[0312]

[0313] In Example 25, the first side surface S1 and the second side surface S2 of the first lens L1, the first side surface S3 and the second side surface S4 of the second lens L2, and the first side surface S9 and the second side surface S10 of the fifth lens L5 are all aspherical surfaces. Table 50 provides the conic coefficient k and the higher-order coefficients A4, A6, A8 and A10 that can be used for each aspherical surface S1, S2, S3, S4, S9 and S10 in Example 25.

[0314] Table 50

[0315] Face number k A4 A6 A8 A10 S1 -0.018 -2.640E-07 7.297E-10 -6.864E-14 -1.596E-16 S2 -90.000 -3.652E-07 7.505E-10 1.270E-12 0.000E+00 S3 -7.818 2.504E-06 -7.105E-09 -2.940E-12 1.923E-15 S4 -38.000 1.501E-06 -6.345E-09 4.042E-13 0.000E+00 S9 -7.149 2.032E-05 -2.327E-08 1.184E-11 0.000E+00 S10 -0.752 8.983E-06 -1.626E-08 6.266E-12 0.000E+00

[0316] The optical lens of Example 25 has an MTF value exceeding 0.2 at a spatial frequency of 20 lp / mm (20 line pairs / mm) for its edge field of view. Therefore, the optical lens provided in Example 25 has good imaging quality or light projection effect.

[0317] Tables 51-1 to 51-3 provide the basic parameters of the optical lenses in Examples 1-25.

[0318] Table 51-1

[0319]

[0320]

[0321] Table 51-2

[0322]

[0323]

[0324] Table 51-3

[0325]

[0326] In summary, the relationships in each of the embodiments in Examples 1-25 satisfy the relationships shown in Tables 52-1 to 52-3.

[0327] Table 52-1

[0328]

[0329]

[0330] Table 52-2

[0331]

[0332]

[0333] Table 52-3

[0334]

[0335]

[0336] This application also provides an electronic device comprising an 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 a second side of the optical lens, for example, on an imaging surface, and may be, for example, a photocoupled device (CCD), a complementary metal oxide semiconductor device (CMOS), an avalanche photodiode detector (APD), a single-photon avalanche photodiode detector (SPAD), or a silicon photomultiplier (SiPM), etc. Light from the first side is imaged on the second side after passing through the optical lens. The optical lens can be a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, etc. The electronic device can be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, a security monitoring camera, a lidar, a microscope, a night vision device, etc., and includes electronic devices such as vehicle-mounted cameras, infrared cameras, drone cameras, night vision cameras, security monitoring cameras, lidar, microscopes, and night vision devices.

[0337] This application also provides an electronic device including an optical lens and a light source as described in the exemplary embodiments above. The light source is located on the second side of the optical lens. Optionally, the light source can be an edge-emitting laser (EEL), a vertical-cavity surface-emitting laser (VCSEL), a fiber laser, an LED light source, a fluorescent laser light source, or a tri-color laser light source, etc. 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 optical lens can be a light-emitting lens such as a projection lens, an illumination lens, or a lidar transmitter lens. The electronic device can be a projector, a lighting lamp, a lidar, etc., as well as electronic devices including projectors, lighting lamps, and lidar.

[0338] 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 invention involved in this application is not limited to 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 positive optical power; A second lens with positive optical power; A third lens with positive or negative optical power; A fourth lens with negative optical power; A fifth lens with positive optical power has a convex first side and a convex second side. A sixth lens having positive or negative optical power has a first convex surface and a second concave surface. The optical lens contains six lenses with optical power. The optical lens satisfies: 1.322≤F1 / F≤9.25; Wherein, F is the total effective focal length of the optical lens, and F1 is the effective focal length of the first lens.

2. The optical lens according to claim 1, characterized in that, The first side surface of the first lens is convex, and the second side surface is convex; or, the first side surface of the first lens is convex, and the second side surface is concave; or, the first side surface of the first lens is flat, and the second side surface is convex; or, the first side surface of the first lens is convex, and the second side surface is flat; or, the first side surface of the first lens is concave, and the second side surface is convex. The first side surface of the second lens is convex, and the second side surface is convex; or, the first side surface of the second lens is convex, and the second side surface is concave; or, the first side surface of the second lens is concave, and the second side surface is convex. The third lens has a first side surface that is convex and a second side surface that is concave; or, the third lens has a first side surface that is convex and a second side surface that is planar; or, the third lens has a first side surface that is planar and a second side surface that is convex; or, the third lens has a first side surface that is concave and a second side surface that is concave; or, the third lens has a first side surface that is concave and a second side surface that is planar; or, the third lens has a first side surface that is concave and a second side surface that is convex. The first side of the fourth lens is concave and the second side is convex; or, the first side of the fourth lens is concave and the second side is concave; or, the first side of the fourth lens is planar and the second side is concave; or, the first side of the fourth lens is convex and the second side is concave; or, the first side of the fourth lens is concave and the second side is planar.

3. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 46.375≤(FOV*F) / H≤66.221, 1.474≤TTL / F≤3.334, 0.165≤TTL / H / FOV≤0.425, 1. 093≤TTL / DMAX≤1.944, 0.185≤(F*θ) / D≤0.308, 0.109≤D / H / FOV≤0.254, 0.074≤D / H / F≤0.170, 0.0013≤|(HF*θ) / (F*θ)|≤0.058, 0.044≤BFL / TTL≤0.143, 1.67≤F / H≤3.671, 0.595≤F / ENPD≤0.897, 0.011≤F / ENPD / D≤0.018, 0.657≤DST / F≤1.481; Wherein, FOV is the maximum field of view of the optical lens, F is the total effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, DMAX is the maximum effective aperture of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the effective aperture on the first side of the first lens, BFL is the back focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, and DST is the aperture diameter.

4. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.524≤D / TTL≤0.894, 2.124≤D / D12≤4.835; Wherein, D is the effective aperture of the first side of the first lens, TTL is the total optical length of the optical lens, and D12 is the effective aperture of the second side of the sixth lens of the optical lens.

5. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 1.632≤F2 / F≤11.155, 0.163≤R3 / F2≤6.26, 0.769≤|F3 / F|≤9.204; Wherein, F is the total effective focal length of the optical lens, F2 is the effective focal length of the second lens, R3 is the radius of curvature of the first side surface of the second lens, and F3 is the effective focal length of the third lens.

6. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies the following relationship: -2.687≤F4 / F≤-0.489; Wherein, F is the total effective focal length of the optical lens, and F4 is the effective focal length of the fourth lens.

7. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies the following relationship: 0.208≤|T23*BFL / F4|≤1.394; Where T23 is the distance from the second lens to the third lens, BFL is the back focal length of the optical lens, and F4 is the effective focal length of the fourth lens.

8. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 0.0006≤T45 / TTL≤0.078, 0.0014≤T45 / F5≤0.184, -0.194≤T45 / F4≤-0.0008; Wherein, T45 is the distance from the fourth lens to the fifth lens of the optical lens, TTL is the total optical length of the optical lens, F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens.

9. The optical lens according to claim 1 or 2, characterized in that, The optical lens satisfies at least one of the following relationships: 1.555≤F1 / F≤8.043, 54.559≤(FOV*F) / H≤57.583, 1.734≤TTL / F≤2.899, 0.194≤TTL / H / FOV≤0.370, 1.286≤TTL / DMAX≤1 .690, 0.218≤(F*θ) / D≤0.268, 0.128≤D / H / FOV≤0.221, 0.088≤D / H / F≤0.148, 0.0015≤|(HF*θ) / (F*θ)|≤0.050, 0.052≤ BFL / TTL≤0.125, 1.965≤F / H≤3.192, 0.7≤F / ENPD≤0.780, 0.013≤F / ENPD / D≤0.016, 0.773≤DST / F≤1.288, 0.617≤D / TTL ≤0.778, 2.499≤D / D12≤4.205, 1.920≤F2 / F≤9.7, 0.192≤R3 / F2≤5.44, 0.905≤|F3 / F|≤8.003, -2.336≤F4 / F≤-0.575, 0. 245≤|T23*BFL / F4|≤1.212, 0.0007≤T45 / TTL≤0.068, 0.0017≤T45 / F5≤0.160, -0.169≤T45 / F4≤-0.0009, 0.789≤R9 / F5 ≤2.032, -2.730≤R9 / R10≤-0.309, 0.576≤R9 / F≤1.837, 0.469≤R11 / F5≤0.889, 2.954≤|F6 / F|≤9.751, 0.042≤R12 / F6≤0 0.149, 0.323≤R12 / F≤0.496, 0.441≤R11 / F≤0.552, 1.095≤|R11 / R12|≤1.415, 0.25≤F1 / F2≤1.675, 0.398≤|F2 / F3|≤4.596, -2.274≤F4 / F5≤-0.865, 0.091≤T34 / TTL≤0.202, 0.018≤|(|R8|-|R9|) / (|R8|+|R9|)|≤0.808 and 0.618≤F5 / F≤1.028; Wherein, F is the total effective focal length of the optical lens, F1 is the effective focal length of the first lens, FOV is the maximum field of view of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, DMAX is the maximum aperture of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the effective aperture on the first side of the first lens, BFL is the back focal length of the optical lens, ENPD is the entrance pupil diameter of the optical lens, DST is the aperture stop diameter, D12 is the effective aperture on the second side of the sixth lens of the optical lens, F2 is the effective focal length of the second lens, and R3 is the focal length of the second lens. The radius of curvature of the first side surface, F3 is the effective focal length of the third lens, F4 is the effective focal length of the fourth lens, T23 is the distance from the second lens to the third lens, T45 is the distance from the fourth lens to the fifth lens of the optical lens, F5 is the effective focal length of the fifth lens, R9 is the radius of curvature of the first side surface of the fifth lens, R10 is the radius of curvature of the second side surface of the fifth lens, R11 is the radius of curvature of the first side surface of the sixth lens, F6 is the effective focal length of the sixth lens, R12 is the radius of curvature of the second side surface of the sixth lens, T34 is the distance from the third lens to the fourth lens, and R8 is the radius of curvature of the second side surface of the fourth lens.

10. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 9; as well as At least one of an imaging element and a light source; The imaging element is located on the second side of the optical lens, and 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