Optical lens and electronic device

Abstract

The application discloses an optical lens and an electronic device, which sequentially comprise, along an optical axis from a first side to a second side: a first lens with negative optical power, a second lens with positive optical power, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power and a sixth lens with negative optical power. The first side of the first lens is a concave surface, and the second side of the first lens is a concave surface; the second side of the second lens is a convex surface; the first side of the fifth lens is a convex surface, and the second side of the fifth lens is a convex surface. Wherein, the optical power of the fourth lens and the third lens is opposite in positive and negative properties; the number of lenses with optical power in the optical lens is six. The optical lens satisfies: -2.5<=F1 / F2<=-0.9 and 0.2<=d1 / d5<=0.9.

Description

Technical Field

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

[0002] As a core component of automotive driver assistance systems (ADAS) for perceiving the environment, the performance of the forward-facing camera directly determines the reliability of safety functions such as lane keeping and emergency braking. Therefore, with the continuous iteration and upgrading of ADAS, the requirements for the optical performance of forward-facing cameras are becoming increasingly stringent.

[0003] However, most existing automotive forward-looking cameras suffer from problems such as insufficient image size and high sensitivity, which limit the iteration speed of automotive driver assistance systems. 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 with negative optical power, a second lens with positive optical power, a third lens with optical power, a fourth lens with optical power, a fifth lens with positive optical power, and a sixth lens with negative optical power. The first lens has a concave first side surface and a concave second side surface; the second lens has a convex second side surface; the fifth lens has a convex first side surface and a convex second side surface. The fourth and third lenses have opposite optical power attributes; the optical lens contains six lenses with optical power. The optical lens satisfies: -2.5 ≤ F1 / F2 ≤ -0.9 and 0.2 ≤ d1 / d5 ≤ 0.9; where F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, d1 is the center thickness of the first lens, and d5 is the center thickness of the fifth lens.

[0005] The second aspect of this application provides an electronic device comprising an optical lens as described in the exemplary embodiments above, and at least one of an imaging element and a light source, wherein the imaging element is used to convert an optical image or optical information formed by the optical lens into an electrical signal, the light source is located on a second side of the optical lens, and the light emitted by the light source is projected onto a first side of the optical lens after passing through the optical lens, forming an image or an illuminated area on the first side of the optical lens.

[0006] A first lens with negative optical power, after collecting light, can diverge it into the second lens, helping to increase light transmission. The first side of the first lens is concave, allowing it to receive and diverge peripheral light with a smaller aperture, thus improving image quality. The second side of the first lens is also concave, further and rapidly diverging large-angle light rays incident from its first side, allowing the light to reach a higher imaging position, which is beneficial for achieving a small aperture (FNO). The second lens with positive optical power, when receiving the diverged light from the first lens, can appropriately converge the light, helping to reduce the aperture of the rear optical system. Furthermore, the combination of a positive optical power second lens and a negative optical power first lens can effectively correct aberrations and improve resolving power. By making the second side of the second lens convex, it can converge the divergent and upward-pointing light rays transmitted from the front system, helping to reduce the aperture of the rear optical system and achieve miniaturization. Based on this, by controlling the effective focal length F1 of the first lens and the effective focal length F2 of the second lens to satisfy -2.5 ≤ F1 / F2 ≤ -0.9, the effective focal lengths of the first and second lenses can be reasonably allocated. This facilitates the smooth divergence of light collected by the first lens after passing through the second lens, thereby achieving long focal length and large target surface characteristics. The light emitted from the second lens passes through the third and fourth lenses in sequence, and then reaches the fifth lens with positive optical power. By setting both the first and second sides of the fifth lens as convex surfaces, not only can the light be effectively compressed and the system miniaturized, but it can also correct aberrations in the front system and improve resolution. Furthermore, by further controlling the center thickness d1 of the first lens and the center thickness d5 of the fifth lens to satisfy 0.2 ≤ d1 / d5 ≤ 0.9, d1 can be made smaller and d5 larger. This allows the light to be effectively diverged at the front of the system, while the light can be smoothly converged at the rear of the system, thereby reducing aberrations introduced by the tortuous light path and helping to reduce system sensitivity. The light rays emitted from the fifth lens can reach the image plane more smoothly after passing through the sixth lens, which has negative optical power. Attached Figure Description

[0007] Figures 1-20 The structural schematic diagrams of the optical lenses according to Embodiments 1-20 of this application are shown in sequence;

[0008] Figure 21 and Figure 22 The modulation transfer function curves of the optical lenses according to Embodiments 3 and 4 of this application are shown in sequence. Detailed Implementation

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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 formal sense, unless expressly so specified herein.

[0015] 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.

[0016] The features, principles and other aspects of this application are described in detail below.

[0017] 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.

[0018] In an exemplary embodiment, the optical lens provided in this application can be used as a light receiving lens or a light emitting lens, wherein: the light receiving lens is generally used to collect light from the object-side space, and the collected light is used to form detection information, including but not limited to imaging, laser point clouds, etc.; the light emitting lens is generally used to transmit light from the light emitting unit to the object-side space, and the light transmitted to the object-side space can be divided into projection light for forming a projection image or detection light for detecting target information, etc., according to the function of the light.

[0019] It is understood that when the optical lens provided in this application is used as a light-receiving lens such as a camera lens, a lidar receiver lens, a microscope lens, or a telescope lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the image side (such as the side where a photoelectric sensor or retina is located). That is, light from the object side can, for example, form an image on the image side. A camera lens may be, for example, a vehicle-mounted camera, an infrared camera, a drone camera, a night vision camera, or a security monitoring camera. When the optical lens provided in this application is used as a light-emitting lens such as a projection lens or a lidar transmitter lens, the term "first side" as used herein may refer to the object side, and "second side" may refer to the light source side.

[0020] In some possible implementations, the optical lens provided in this application can also simultaneously perform both light receiving and light transmitting functions. For example, the optical lens provided in this application is used in a lidar system with shared light and light paths, where the optical lens simultaneously performs the functions of emitting laser light and receiving radar echo beams. As another example, the optical lens provided in this application is used in a system integrating optical communication and radar, where the optical lens simultaneously performs the functions of emitting modulated optical signals and receiving radar echo beams.

[0021] In an exemplary embodiment, the first lens may have negative optical power, and the first side surface of the first lens may be, for example, concave, and the second side surface of the first lens may also be, for example, concave. A first lens with negative optical power can collect and diverge light, allowing it to enter the rear optical system, thus increasing light transmission. Setting the first side surface of the first lens to be concave allows the first lens to receive and diverge peripheral light with a smaller aperture, which is beneficial for improving the image quality of the lens. Setting the second side surface of the first lens to be concave can further diverge large-angle light from the first side surface of the first lens, allowing the light to reach a higher imaging position, which is beneficial for achieving a small aperture number (FNO). Furthermore, with a fixed refractive index and optical power (light divergence capability), compared to a scheme where the first side surface of the first lens is concave and the second side surface is convex, setting both the first and second sides of the first lens to be concave allows for a larger central radius of curvature of the second side surface (a smoother second side surface), thereby reducing the central thickness of the first lens and thus helping to reduce the weight and volume of the lens front end.

[0022] In an exemplary embodiment, the second lens may have positive optical power, and its first and second sides may be, for example, convex. Setting the second lens to have positive optical power allows it to collect and appropriately converge the diverging light emitted from the first lens, contributing to a smaller aperture. Furthermore, using a second lens with positive optical power in conjunction with a first lens with negative optical power can effectively correct aberrations and improve resolving power. The fact that both the first and second sides of the second lens are convex allows it to converge the diverging, upward-pointing light transmitted from the front system twice. This not only smoothly transmits the large-angle light collected by the front system to the rear system, reducing system sensitivity, but also achieves miniaturization by bending and converging the light.

[0023] In an exemplary embodiment, the second lens may have positive optical power, and its first side surface may be, for example, concave, and its second side surface may be, for example, convex. Setting the second lens to have positive optical power allows it to collect and appropriately converge divergent light rays emitted from the first lens, which helps reduce the aperture of the rear optical system. Setting the first side surface of the second lens to be concave allows it to receive light rays emitted from the first lens with a smaller aperture and further diverges upward-pointing light rays, thus improving peripheral light transmission. Setting the second side surface of the second lens to be convex allows it to converge divergent upward-pointing light rays transmitted from the front system, further contributing to a reduction in the aperture of the rear optical system and miniaturization.

[0024] In an exemplary embodiment, the third lens may have positive optical power, and its first side surface may be, for example, convex, as well as its second side surface. Setting the third lens to have positive optical power allows it to further converge and gather the light rays emitted from the second lens, enabling the light to reach the image plane faster. This helps reduce the overall optical length of the lens and achieve miniaturization. By simultaneously setting both the first and second side surfaces of the third lens to convex, it can converge the diverging and upward-pointing light rays transmitted from the front system twice. This not only smoothly transmits the large-angle light rays collected by the front system to the rear system, thereby reducing the system's sensitivity, but also achieves miniaturization by bending and converging the light rays.

[0025] 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. Setting the third lens to have positive optical power allows it to further converge and gather the light rays emitted from the second lens, enabling the light to reach the image plane faster, thus helping to reduce the overall optical length of the lens and achieve miniaturization. Setting the first side surface of the third lens to be convex allows it to converge the divergent and upward-pointing light rays transmitted from the front system, helping to reduce the aperture of the rear optical system and achieve miniaturization. Setting the second side surface of the third lens to be concave allows it to moderately diverge the light rays converged by the second side surface of the second lens, thereby controlling the optical path difference between the central and peripheral rays, which is beneficial for balancing the field of view resolution and improving the imaging quality of the system.

[0026] In an exemplary embodiment, the third lens may have negative optical power, and the first side surface of the third lens may be, for example, concave, and the second side surface of the third lens may be, for example, concave. By setting the second and fourth lenses to have positive optical power and the third lens to have negative optical power, it helps to correct aberrations and improve resolving power. Setting the first side surface of the third lens to be concave allows it to receive forward light rays and reach a higher imaging position, which is beneficial for increasing peripheral light transmission. Setting the second side surface of the third lens to be concave further diverges the light rays that have passed through the first side surface of the third lens, thereby allowing the light rays to reach a higher imaging position, which is also beneficial for increasing peripheral light transmission.

[0027] 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, convex. By setting the second and fourth lenses to have positive optical power and the third lens to have negative optical power, aberration correction and resolving power are facilitated. The concave first side surface of the third lens allows for appropriate divergence of light, thus smoothing the path of light rays emitted from the convex front surface, which is beneficial for improving resolving power. The convex second side surface of the third lens allows for convergence of light rays, enabling them to reach the image plane quickly, which helps reduce the overall optical length of the optical system. Furthermore, the concave surface of the second side surface of the third lens can be balanced with the convex surface of the first side surface, which helps correct aberrations and improve resolving power.

[0028] In an exemplary embodiment, the fourth lens may have negative optical power, and its first and second sides may be concave, for example. By setting the fourth lens to have negative optical power, the tendency of forward light rays to converge can be moderately smoothed out. Furthermore, setting the third and fifth lenses to have positive optical power helps to balance aberrations. By setting the first side of the fourth lens to be concave, forward aberrations can be corrected. By setting the second side of the fourth lens to be concave, the tendency of light rays to converge can be weakened, improving relative illumination.

[0029] In an exemplary embodiment, the fourth 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. By setting the fourth lens to have negative optical power, the tendency of forward light rays to converge can be moderately smoothed out. Furthermore, setting the third and fifth lenses to have positive optical power helps to balance aberrations. By designing the first side surface of the fourth lens to be convex, the first side surface of the fourth lens can compress light rays, thereby reducing the aperture of the first side surface of the fourth lens. By setting the second side surface of the fourth lens to be concave, the light path can be smoothed out, helping to reduce system sensitivity.

[0030] In an exemplary embodiment, the fourth lens may have positive optical power, and the first side surface of the fourth lens may be, for example, convex, and the second side surface of the fourth lens may be, for example, convex. By simultaneously setting the first and second sides of the fourth lens with positive optical power to convex surfaces, the rear port diameter of the optical system can be effectively reduced, which helps to reduce the system length and achieve miniaturization.

[0031] In an exemplary embodiment, the fourth lens may have positive optical power, and the first side of the fourth lens may be, for example, concave, and the second side of the fourth lens may be, for example, convex. By designing the fourth lens as a concave-convex meniscus lens, the incident and exit angles of light at the fourth lens are almost not deflected, which helps to reduce system sensitivity.

[0032] In an exemplary embodiment, the third lens and the fourth lens are cemented together to form a cemented lens. The optical power of the third lens and the fourth lens have opposite positive and negative properties. By cementing the third lens and the fourth lens, chromatic aberration can be effectively corrected and the overall lens length can be reduced. Simultaneously, the light transitions smoothly to the image plane, thereby optimizing the optical system's principal ray angle (CRA), illuminance, distortion, and other performance characteristics. The negative optical power lens in the third and fourth lenses clearly distinguishes the edge rays from the central rays in each field of view, which is beneficial for aberration correction of the central and edge rays in each field of view and for achieving high resolution. Specifically, the negative optical power lens in the third and fourth lenses is made of a high-refractive-index, low-Abbe number material, while the positive optical power lens in the third and fourth lenses is made of a low-refractive-index, high-Abbe number material. Thus, the cemented third and fourth lenses effectively correct chromatic aberration in the optical system. Cementing the third and fourth lenses reduces the number of assembly components between them, which helps reduce assembly steps and the overall weight of the lens, thereby lowering costs. By cementing the third and fourth lenses together, the energy loss caused by light reflection between them can be reduced, thereby improving image illumination and weakening ghosting. Furthermore, the smooth transition of light as it passes through the cemented surface reduces sensitivity to tolerances such as eccentricity and tilt between the third and fourth lenses. Therefore, cementing the third and fourth lenses also reduces tolerance sensitivity during assembly.

[0033] In an exemplary embodiment, the fifth lens may have positive optical power, and the first side surface of the fifth lens may be, for example, convex, and the second side surface of the fifth lens may be, for example, convex. By simultaneously setting the first and second side surfaces of the fifth lens with positive optical power to convex, not only can the fifth lens effectively compress light and facilitate miniaturization, but the convex surface can also be used to correct aberrations caused by the concave surface of the front system, thereby improving the system's resolving power.

[0034] In an exemplary embodiment, the sixth lens may have negative optical power, and the first side surface of the sixth lens may be, for example, concave, and the second side surface of the sixth lens may be, for example, concave. By simultaneously setting the first and second sides of the sixth lens with negative optical power to concave, the tendency of light to continuously converge can be smoothed, the optical path difference between the central field of view and the edge field of view can be adjusted, and the resolution in each field of view can be improved.

[0035] In an exemplary embodiment, the sixth 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. By setting the first side surface of the sixth lens with negative optical power to be concave, the tendency of light rays to continuously converge can be moderately smoothed out, adjusting the optical path difference between the central field of view rays and the peripheral field of view rays. Setting the second side surface of the sixth lens to be convex allows light rays to converge smoothly to the image plane, reducing the generation of aberrations.

[0036] In an exemplary embodiment, the sixth 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. By setting the first side surface of the sixth lens with negative optical power to be convex, the sixth lens can smoothly receive the light emitted from the front system. By setting the second side surface of the sixth lens to be concave, the light can smoothly transition to the image side.

[0037] In an exemplary embodiment, the optical lens may further include an aperture stop, which may be disposed, for example, between the first lens and the second lens. By disposing an aperture stop between the first lens and the second lens, the light entering the optical system can be effectively focused, reducing the aperture of the rear lens of the optical system and lowering the system's assembly sensitivity. It should be understood that disposing the aperture stop between the first lens and the second lens is merely exemplary, and this application does not impose specific limitations on it. The aperture stop may be disposed in other positions as needed.

[0038] In an exemplary embodiment, both the first side surface of the second lens and the second side surface of the second lens have at least one inflection point. This arrangement helps to balance aberrations and improve resolution.

[0039] In an exemplary embodiment, the surface of the second lens may have one or two aspherical surfaces. This configuration is beneficial for achieving a large angular resolution in the central region and improving field curvature and astigmatism, thereby enhancing resolving power.

[0040] 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.

[0041] In an exemplary embodiment, the optical lens may further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side may be a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0042] In an exemplary embodiment, the optical lens satisfies: 1.2 ≤ R² / F ≤ 25. Preferably, 1.85 ≤ R² / F ≤ 8.5. Further, 2.867 ≤ R² / F ≤ 8. Wherein, R² is the central radius of curvature of the second side surface of the first lens, and F is the effective focal length of the optical lens. This configuration allows the second side surface of the first lens to be concave, thereby enabling effective divergence of light on this side. The lens front end can effectively expand the light beam with a smaller aperture, meeting the imaging height requirements. Furthermore, while keeping the refractive index and optical power (light divergence capability) of the first lens constant, compared to setting the second side surface of the first lens to be convex, setting the second side surface of the first lens to be concave allows for a smoother second side surface, thereby reducing the central thickness of the first lens and thus reducing the weight and volume of the lens front end.

[0043] In an exemplary embodiment, the optical lens satisfies: -1.65 ≤ F1 / F ≤ -0.8. Preferably, -1.6 ≤ F1 / F ≤ -0.9. Further, -1.5 ≤ F1 / F ≤ -1.074. Wherein, F is the effective focal length of the optical lens, and F1 is the effective focal length of the first lens. This configuration effectively collects and disperses light rays from various fields of view, facilitating telephoto imaging by the optical lens.

[0044] In an exemplary embodiment, the optical lens satisfies: -2.5 ≤ F1 / F2 ≤ -0.9. Preferably, -2 ≤ F1 / F2 ≤ -0.95. Further, -1.533 ≤ F1 / F2 ≤ -1. Wherein, F1 is the effective focal length of the first lens, and F2 is the effective focal length of the second lens. This configuration allows for a reasonable allocation of the effective focal lengths of the first and second lenses, ensuring that the light rays collected and diverged by the first lens are smoothly diverged upon passing through the second lens, which is beneficial for achieving long focal lengths and large target surface characteristics.

[0045] In an exemplary embodiment, the optical lens satisfies: -20 ≤ F1 / d1 ≤ -7.8. Preferably, -18.5 ≤ F1 / d1 ≤ -8.65. Further, -15.38 ≤ F1 / d1 ≤ -8.501. Wherein, F1 is the effective focal length of the first lens, and d1 is the center thickness of the first lens. This configuration allows the first lens to effectively diverge light with a relatively small volume, which is beneficial for achieving long focal length and large target surface characteristics.

[0046] In an exemplary embodiment, the optical lens satisfies: 0.75 ≤ (R9 + |R10|) / F ≤ 4.15. Preferably, 1.2 ≤ (R9 + |R10|) / F ≤ 3.8. Further, 1.706 ≤ (R9 + |R10|) / F ≤ 3.749. Wherein, R9 is the center radius of curvature of the first side of the fifth lens, R10 is the center radius of curvature of the second side of the fifth lens, and F is the effective focal length of the optical lens. This setting allows the changes of R9 and R10 during temperature fluctuations to be more balanced, which is beneficial for the lens to maintain imaging stability in both high-temperature and low-temperature environments.

[0047] In an exemplary embodiment, the optical lens satisfies: 0.8 ≤ d5 / d56 ≤ 2.7. Preferably, 1 ≤ d5 / d56 ≤ 1.9. Further, 1.118 ≤ d5 / d56 ≤ 1.85. Wherein, d5 is the center thickness of the fifth lens, and d56 is the center distance between the second side surface of the fifth lens and the first side surface of the sixth lens. This configuration allows for a thicker center thickness of the fifth lens and a larger gap between the fifth and sixth lenses. This not only reduces the sensitivity of light at this point, improving image quality, but also further compresses converging light rays, reducing the overall optical length of the system.

[0048] In an exemplary embodiment, the optical lens satisfies: 0.01 ≤ d23 / d2 ≤ 1.3. Preferably, 0.015 ≤ d23 / d2 ≤ 0.5. Further, 0.021 ≤ d23 / d2 ≤ 0.432. Wherein, d2 is the center thickness of the second lens, and d23 is the center distance between the second side surface of the second lens and the first side surface of the third lens. This configuration allows for a thicker center thickness of the second lens and a smaller gap between the second and third lenses. This not only reduces the sensitivity of light at this point but also avoids the introduction of unwanted stray light, thus improving image quality.

[0049] In an exemplary embodiment, the optical lens satisfies: 0 < |F / F34| ≤ 0.5. Preferably, 0 < |F / F34| ≤ 0.4. Further, 0.004 ≤ |F / F34| ≤ 0.312. Wherein, F is the effective focal length of the optical lens, and F34 is the combined focal length of the third lens and the fourth lens. This configuration allows for a smooth transition of light at the third and fourth lenses, thereby reducing aberrations, facilitating the correction of aberrations such as chromatic aberration, and improving image quality.

[0050] In an exemplary embodiment, the optical lens satisfies: 0.08 ≤ d4 / d3 ≤ 10. Preferably, 0.1 ≤ d4 / d3 ≤ 8. Further, 0.14 ≤ d4 / d3 ≤ 6.429. Wherein, d3 is the center thickness of the third lens, and d4 is the center thickness of the fourth lens. This configuration allows the light rays to converge smoothly both when incident on the third lens and when exiting the fourth lens, thereby reducing system sensitivity and achieving high resolution.

[0051] In an exemplary embodiment, the optical lens satisfies: 0 < (R5 × R8) / (R6 × R7) ≤ 2. Preferably, 0.001 ≤ (R5 × R8) / (R6 × R7) ≤ 1.5. Further, 0.002 ≤ (R5 × R8) / (R6 × R7) ≤ 1.267. Wherein, R5 is the central radius of curvature of the first side surface of the third lens, R6 is the central radius of curvature of the second side surface of the third lens, R7 is the central radius of curvature of the first side surface of the fourth lens, and R8 is the central radius of curvature of the second side surface of the fourth lens. This configuration allows for a smoother surface profile of the first, second, and fourth sides of the third and fourth lenses, facilitating a smoother transition of light and thus reducing system sensitivity. Simultaneously, the changes in the first, second, and fourth sides of the third and fourth lenses tend to be more balanced during temperature changes, which is beneficial for improving system imaging stability.

[0052] In an exemplary embodiment, the optical lens satisfies: 1.5 ≤ F / H ≤ 1.8. Preferably, 1.55 ≤ F / H ≤ 1.75. Further, 1.629 ≤ F / H ≤ 1.689. F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. This setting helps to achieve high resolution.

[0053] In an exemplary embodiment, the optical lens satisfies: 0.015 ≤ D / H / FOV × 1° ≤ 0.045. Preferably, 0.02 ≤ D / H / FOV × 1° ≤ 0.04. Further, 0.032 ≤ D / H / FOV × 1° ≤ 0.034. H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum aperture corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. This configuration enables the lens to possess both small aperture and large target surface characteristics.

[0054] In an exemplary embodiment, the optical lens satisfies: 0 < Nd5 / Vd5 ≤ 0.02. Preferably, 0.012 ≤ Nd5 / Vd5 ≤ 0.0185. Further, Nd5 / Vd5 = 0.018. Here, Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens. With such a setting, the fifth lens can have a good thermal compensation effect, which is beneficial to maintaining stable imaging when the temperature changes.

[0055] In an exemplary embodiment, the optical lens satisfies: 2 ≤ |F34 / F5| ≤ 550. Preferably, 2.5 ≤ |F34 / F5| ≤ 350. Further, 2.729 ≤ |F34 / F5| ≤ 325.915. Here, F5 is the effective focal length of the fifth lens, and F34 is the combined focal length of the third lens and the fourth lens. With such a setting, it is beneficial to the gentle transition of the converging light, and the system can have good sensitivity and stability, and can maintain stable imaging when the temperature changes.

[0056] In an exemplary embodiment, the optical lens satisfies: 0.2 ≤ |F5 / F4| ≤ 3. Preferably, 0.4 ≤ |F5 / F4| ≤ 2.6. Further, 0.836 ≤ |F5 / F4| ≤ 2.484. Here, F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens. With such a setting, the light can maintain a stable converging trend relative to the central optical axis when exiting from the fourth lens and the fifth lens, and the system can have good sensitivity and stability, and can maintain stable imaging when the temperature changes.

[0057] In an exemplary embodiment, the optical lens satisfies: 0.85 ≤ (H / 2) / (F × tan(θ / 2)) ≤ 1.2. Preferably, 0.925 ≤ (H / 2) / (F × tan(θ / 2)) ≤ 1.1. Further, 0.957 ≤ (H / 2) / (F × tan(θ / 2)) ≤ 0.992. Here, H is the image height corresponding to the maximum field angle of the optical lens, F is the effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field angle of the optical lens. With such a setting, the lens can achieve small distortion, and each field can have a large angular resolution, which is beneficial to improving the overall imaging quality of the lens.

[0058] In an exemplary embodiment, the optical lens satisfies: 1.2 ≤ TTL / F ≤ 2.4. Preferably, 1.5 ≤ TTL / F ≤ 2.2. Further, 1.906 ≤ TTL / F ≤ 2. Here, TTL is the overall optical length of the optical lens, and F is the effective focal length of the optical lens. With such a setting, when the effective focal length of the optical lens remains unchanged, the overall optical length of the optical lens can be smaller, which is beneficial to the miniaturization of the lens.

[0059] In an exemplary embodiment, the optical lens satisfies: 0.06 ≤ D / H / F × 1mm ≤ 0.085. Preferably, 0.065 ≤ D / H / F × 1mm ≤ 0.08. Further, 0.072 ≤ D / H / F × 1mm ≤ 0.076. Wherein, H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum aperture corresponding to the maximum field of view of the optical lens, and F is the effective focal length of the optical lens. This configuration allows the lens to have the characteristics of a large target surface and a small aperture while maintaining a fixed effective focal length.

[0060] In an exemplary embodiment, the optical lens satisfies: 0.08 ≤ TTL / H / FOV × 1° ≤ 0.15. Preferably, 0.09 ≤ TTL / H / FOV × 1° ≤ 0.125. Further, 0.093 ≤ TTL / H / FOV × 1° ≤ 0.097. Wherein, TTL is the total optical length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and FOV is the maximum field of view of the optical lens. This configuration allows for a reduction in the total optical length while keeping the image height and maximum field of view fixed, thereby achieving lens miniaturization.

[0061] In an exemplary embodiment, the optical lens satisfies: 0.6 ≤ F2 / F ≤ 1.85. Preferably, 0.7 ≤ F2 / F ≤ 1.7. Further, 0.762 ≤ F2 / F ≤ 1.5. Wherein, F2 is the effective focal length of the second lens, and F is the effective focal length of the optical lens. This setting allows the effective focal length of the second lens to be positive and relatively small, preventing excessive light divergence, which is beneficial for achieving the overall small aperture characteristics of the lens and reducing the total optical length.

[0062] In an exemplary embodiment, the optical lens satisfies: 0.65 ≤ F5 / F ≤ 1.65. Preferably, 0.7 ≤ F5 / F ≤ 1.5. Further, 0.804 ≤ F5 / F ≤ 1.405. Wherein, F5 is the effective focal length of the fifth lens, and F is the effective focal length of the optical lens. This setting allows for a reasonable allocation of the effective focal length of the fifth lens, thereby enabling effective convergence of light at the fifth lens and facilitating system miniaturization.

[0063] In an exemplary embodiment, the optical lens satisfies: -2.5 ≤ F6 / F ≤ -0.5. Preferably, -2.2 ≤ F6 / F ≤ -0.7. Further, -1.996 ≤ F6 / F ≤ -0.814. Wherein, F6 is the effective focal length of the sixth lens, and F is the effective focal length of the optical lens. This setting allows the effective focal length of the sixth lens to be negative and reasonably allocated, thereby smoothing the convergence trend of the light rays in front, allowing the light rays to enter the image plane more smoothly, which is beneficial for balancing aberrations and achieving high resolution.

[0064] In an exemplary embodiment, the optical lens satisfies: -1.85 ≤ F5 / F6 ≤ -0.25. Preferably, -1.65 ≤ F5 / F6 ≤ -0.4. Further, -1.408 ≤ F5 / F6 ≤ -0.469. Wherein, F5 is the effective focal length of the fifth lens, and F6 is the effective focal length of the sixth lens. The effective focal length of the fifth lens is positive, and the effective focal length of the sixth lens is negative. By controlling the ratio of these two, it is beneficial to correct and balance aberrations, thereby achieving high resolution.

[0065] In an exemplary embodiment, the optical lens satisfies: 50 ≤ (FOV×F) / H / 1° ≤ 65. Preferably, 54 ≤ (FOV×F) / H / 1° ≤ 60. Further, 56.029 ≤ (FOV×F) / H / 1° ≤ 58.093. Wherein, FOV is the maximum field of view of the optical lens, F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens. This setting is beneficial for improving the telephoto effect of the lens, thereby matching the telephoto function.

[0066] In an exemplary embodiment, the optical lens satisfies: 0.2 ≤ d1 / d5 ≤ 0.9. Preferably, 0.22 ≤ d1 / d5 ≤ 0.85. Further, 0.259 ≤ d1 / d5 ≤ 0.797. Wherein, d1 is the center thickness of the first lens, and d5 is the center thickness of the fifth lens. This configuration allows d1 to be smaller and d5 to be larger, enabling effective divergence of light in front of the system while allowing light to converge smoothly behind the system, thereby reducing aberrations introduced by the tortuous path of light and helping to reduce system sensitivity.

[0067] In an exemplary embodiment, the optical lens satisfies: -0.3 ≤ R1 / (R2+d1) < 0. Preferably, -0.27 ≤ R1 / (R2+d1) ≤ -0.025. Further, -0.26 ≤ R1 / (R2+d1) ≤ -0.038. Wherein, R1 is the central radius of curvature of the first side surface of the first lens, R2 is the central radius of curvature of the second side surface of the first lens, and d1 is the central thickness of the first lens. This configuration allows for a smaller central thickness of the first lens, thereby effectively diverging light within a smaller volume, which is beneficial for achieving telephoto and large target surface imaging characteristics.

[0068] In an exemplary embodiment, the optical lens satisfies: 1 ≤ d(+) / d(-) ≤ 8. Preferably, 1.1 ≤ d(+) / d(-) ≤ 7.5. Further, 1.144 ≤ d(+) / d(-) ≤ 7.143. Wherein, d(+) is the center thickness of the third lens and the fourth lens having positive optical power, and d(-) is the center thickness of the third lens and the fourth lens having negative optical power. This setting allows d(+) to be greater than d(-), thereby increasing the propagation distance of light in the positive optical power lens, helping to share the light compression task of the rear system, and is beneficial for correcting aberrations and achieving low sensitivity.

[0069] In an exemplary embodiment, 2 ≤ R2×d12 / F / 1mm ≤ 24. Preferably, 2.5 ≤ R2×d12 / F / 1mm ≤ 20. Further, 3.359 ≤ R2×d12 / F / 1mm ≤ 17.523. Wherein, R2 is the center radius of curvature of the second side surface of the first lens, d12 is the center distance between the second side surface of the first lens and the first side surface of the second lens, and F is the effective focal length of the optical lens. This configuration allows the second side surface of the first lens to be concave, while appropriately increasing the distance between the first and second lenses, thereby facilitating light divergence at the front end of the system and achieving long-focal-length, large-target-area imaging characteristics.

[0070] The optical lens according to the above embodiments of this application can employ multiple lenses, such as the six lenses mentioned above. By rationally allocating the optical parameters of each lens, the optical lens achieves small aperture, miniaturization, high resolution, low sensitivity, large angular resolution, large field of view, low distortion, small principal angle, high illumination, and good manufacturability. Furthermore, it can be well-matched to applications such as automotive chips without vignetting. This optical lens exhibits excellent temperature performance, with minimal changes in imaging effect at high and low temperatures, and stable image quality. Therefore, the optical lens according to the above embodiments of this application can better meet the requirements of applications such as automotive applications.

[0071] 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 image 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).

[0072] 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.

[0073] Specific embodiments of the optical lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings. It should be understood that the units for the radius of curvature and thickness / distance in the basic parameters of the optical lens are mm.

[0074] Example 1

[0075] like Figure 1 As shown, the optical lens of Embodiment 1 of this application includes, sequentially from the first side to the second side along the optical axis: 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 disposed between the first lens L1 and the second lens L2. The third lens L3 and the fourth lens L4 are cemented together to form a cemented lens.

[0076] The first lens L1 has negative optical power, and its first side surface S1 is concave, and its second side surface S2 is concave.

[0077] The second lens L2 has positive optical power, and its first side surface S4 is convex, and its second side surface S5 is convex.

[0078] The third lens L3 has positive optical power, and its first side surface S6 is convex, and its second side surface S7 is convex.

[0079] The fourth lens L4 has negative optical power, and its first side surface S7 is concave, and its second side surface S8 is concave.

[0080] The fifth lens L5 has positive optical power, and its first side surface S9 is convex, and its second side surface S10 is convex.

[0081] The sixth lens L6 has negative optical power, with its first side surface S11 being concave and its second side surface S12 being convex.

[0082] An image plane IMA is provided on the second side of the optical lens. A filter IR and a protective glass CG are disposed between the sixth lens L6 and the image plane IMA. The filter IR has a first side surface S13 and a second side surface S14, and the protective glass CG has a first side surface S15 and a second side surface S16. When the IMA is the imaging plane, light from the object passes through each surface sequentially and is finally imaged on the IMA. When the IMA is the image source plane, light from the IMA passes through each surface sequentially and is finally projected onto the object.

[0083] Table 1 shows the basic parameters of the optical lens of Example 1.

[0084] Table 1

[0085]

[0086] In Embodiment 1, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces, and the surface shape of each aspherical surface can be defined using, but is not limited to, the following aspherical surface formula:

[0087] ;

[0088] 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. Tables 2-1 and 2-2 give the conic coefficient k and higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for the aspherical surfaces S4 and S5 in Example 1.

[0089] Table 2-1

[0090]

[0091] Table 2-2

[0092]

[0093] The optical lens of Example 1 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0094] Example 2

[0095] like Figure 2 As shown, the main difference between the optical lens of Embodiment 2 and Embodiment 1 is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different. Table 3 shows the basic parameters of the optical lens of Embodiment 2.

[0096] Table 3

[0097]

[0098] In Embodiment 2, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Table 4 gives the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18 and A20 that can be used for each aspherical surface S4 and S5 in Embodiment 2.

[0099] Table 4

[0100]

[0101] The optical lens of Example 2 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0102] Example 3

[0103] like Figure 3 As shown, the main differences between the optical lens of Embodiment 3 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 S7 of the third lens L3 is concave; and the first side surface S7 of the fourth lens L4 is convex. Table 5 shows the basic parameters of the optical lens of Embodiment 3.

[0104] Table 5

[0105]

[0106] In Example 3, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 6-1 and 6-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 3.

[0107] Table 6-1

[0108]

[0109] Table 6-2

[0110]

[0111] from Figure 21 As can be seen, the MTF peak value of the optical lens in Example 3 at the center field of view exceeds 0.75 at a spatial frequency of 83 lp / mm (83 line pairs / mm). Therefore, the optical lens given in Example 3 has good imaging quality and can achieve 8-megapixel imaging.

[0112] Example 4

[0113] like Figure 4 As shown, the main differences between the optical lens of Embodiment 4 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 S7 of the third lens L3 is concave; the first side surface S7 of the fourth lens L4 is convex; and the second side surface S12 of the sixth lens L6 is concave. Table 7 shows the basic parameters of the optical lens of Embodiment 4.

[0114] Table 7

[0115]

[0116] In Example 4, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 8-1 and 8-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 4.

[0117] Table 8-1

[0118]

[0119] Table 8-2

[0120]

[0121] from Figure 22 As can be seen, the MTF peak value of the optical lens in Example 4 at the center field of view exceeds 0.76 at a spatial frequency of 83 lp / mm (83 line pairs / mm). Therefore, the optical lens given in Example 4 has good imaging quality and can achieve eight-megapixel imaging.

[0122] Example 5

[0123] like Figure 5 As shown, the main difference between the optical lens of Embodiment 5 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S4 of the second lens L2 has at least one inflection point. Table 9 shows the basic parameters of the optical lens of Embodiment 5.

[0124] Table 9

[0125]

[0126] In Example 5, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 10-1 and 10-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 5.

[0127] Table 10-1

[0128]

[0129] Table 10-2

[0130]

[0131] The optical lens of Example 5 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0132] Example 6

[0133] like Figure 6 As shown, the main difference between the optical lens of Embodiment 6 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S4 of the second lens L2 has at least one inflection point. Table 11 shows the basic parameters of the optical lens of Embodiment 6.

[0134] Table 11

[0135]

[0136] In Example 6, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 12-1 and 12-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 6.

[0137] Table 12-1

[0138]

[0139] Table 12-2

[0140]

[0141] The optical lens of Example 6 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0142] Example 7

[0143] like Figure 7 As shown, the main difference between the optical lens of Embodiment 7 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S4 of the second lens L2 is concave. Table 13 shows the basic parameters of the optical lens of Embodiment 7.

[0144] Table 13

[0145]

[0146] In Example 7, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 14-1 and 14-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 7.

[0147] Table 14-1

[0148]

[0149] Table 14-2

[0150]

[0151] The optical lens of Example 7 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0152] Example 8

[0153] like Figure 8 As shown, the main difference between the optical lens of Embodiment 8 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S4 of the second lens L2 is concave. Table 15 shows the basic parameters of the optical lens of Embodiment 8.

[0154] Table 15

[0155]

[0156] In Example 8, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 16-1 and 16-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 8.

[0157] Table 16-1

[0158]

[0159] Table 16-2

[0160]

[0161] The optical lens of Example 8 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0162] Example 9

[0163] like Figure 9 As shown, the main difference between the optical lens of Embodiment 9 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S4 of the second lens L2 is concave. Table 17 shows the basic parameters of the optical lens of Embodiment 9.

[0164] Table 17

[0165]

[0166] In Example 9, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 18-1 and 18-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 9.

[0167] Table 18-1

[0168]

[0169] Table 18-2

[0170]

[0171] The optical lens of Example 9 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0172] Example 10

[0173] like Figure 10 As shown, the main difference between the optical lens of Embodiment 10 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S4 of the second lens L2 is concave. Table 19 shows the basic parameters of the optical lens of Embodiment 10.

[0174] Table 19

[0175]

[0176] In Example 10, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 20-1 and 20-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 10.

[0177] Table 20-1

[0178]

[0179] Table 20-2

[0180]

[0181] The optical lens of Example 10 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0182] Example 11

[0183] like Figure 11 As shown, the main difference between the optical lens of Embodiment 11 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S12 of the sixth lens L6 is concave. Table 21 shows the basic parameters of the optical lens of Embodiment 11.

[0184] Table 21

[0185]

[0186] In Example 11, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 22-1 and 22-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 11.

[0187] Table 22-1

[0188]

[0189] Table 22-2

[0190]

[0191] The optical lens of Example 11 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0192] Example 12

[0193] like Figure 12 As shown, the main difference between the optical lens of Embodiment 12 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the second side surface S12 of the sixth lens L6 is concave. Table 23 shows the basic parameters of the optical lens of Embodiment 12.

[0194] Table 23

[0195]

[0196] In Example 12, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 24-1 and 24-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 12.

[0197] Table 24-1

[0198]

[0199] Table 24-2

[0200]

[0201] The optical lens of Example 12 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0202] Example 13

[0203] like Figure 13 As shown, the main difference between the optical lens of Embodiment 13 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S11 of the sixth lens L6 is convex, and the second side surface S12 of the sixth lens L6 is concave. Table 25 shows the basic parameters of the optical lens of Embodiment 13.

[0204] Table 25

[0205]

[0206] In Example 13, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 26-1 and 26-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 13.

[0207] Table 26-1

[0208]

[0209] Table 26-2

[0210]

[0211] The optical lens of Example 13 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0212] Example 14

[0213] like Figure 14 As shown, the main difference between the optical lens of Embodiment 14 and Embodiment 1 is that the optical parameters such as the radius of curvature and lens thickness of each lens surface are different; the first side surface S11 of the sixth lens L6 is convex, and the second side surface S12 of the sixth lens L6 is concave. Table 27 shows the basic parameters of the optical lens of Embodiment 14.

[0214] Table 27

[0215]

[0216] In Example 14, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 28-1 and 28-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 14.

[0217] Table 28-1

[0218]

[0219] Table 28-2

[0220]

[0221] The optical lens of Example 14 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0222] Example 15

[0223] like Figure 15 As shown, the main differences between the optical lens of Embodiment 15 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 S6 of the third lens L3 is concave, and the second side surface S7 of the third lens L3 is concave; the fourth lens L4 has positive optical power, the first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex; the second side surface S12 of the sixth lens L6 is concave; and the second side surface S5 of the second lens L2 has at least one inflection point. Table 29 shows the basic parameters of the optical lens of Embodiment 15.

[0224] Table 29

[0225]

[0226] In Example 15, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 30-1 and 30-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 15.

[0227] Table 30-1

[0228]

[0229] Table 30-2

[0230]

[0231] The optical lens of Example 15 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0232] Example 16

[0233] like Figure 16 As shown, the main differences between the optical lens of Embodiment 16 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 S6 of the third lens L3 is concave, and the second side surface S7 of the third lens L3 is concave; the fourth lens L4 has positive optical power, the first side surface S7 of the fourth lens L4 is convex, and the second side surface S8 of the fourth lens L4 is convex; the second side surface S12 of the sixth lens L6 is concave; and the second side surface S5 of the second lens L2 has at least one inflection point. Table 31 shows the basic parameters of the optical lens of Embodiment 16.

[0234] Table 31

[0235]

[0236] In Example 16, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 32-1 and 32-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 16.

[0237] Table 32-1

[0238]

[0239] Table 32-2

[0240]

[0241] The optical lens of Example 16 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0242] Example 17

[0243] like Figure 17 As shown, the main differences between the optical lens of Embodiment 17 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, and the first side surface S6 of the third lens L3 is concave; the fourth lens L4 has positive optical power, and the second side surface S8 of the fourth lens L4 is convex; the second side surface S12 of the sixth lens L6 is concave. Table 33 shows the basic parameter table of the optical lens of Embodiment 17.

[0244] Table 33

[0245]

[0246] In Example 17, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 34-1 and 34-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 17.

[0247] Table 34-1

[0248]

[0249] Table 34-2

[0250]

[0251] The optical lens of Example 17 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0252] Example 18

[0253] like Figure 18 As shown, the main differences between the optical lens of Embodiment 18 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, and the first side surface S6 of the third lens L3 is concave; the fourth lens L4 has positive optical power, and the second side surface S8 of the fourth lens L4 is convex; the second side surface S12 of the sixth lens L6 is concave. Table 35 shows the basic parameters of the optical lens of Embodiment 18.

[0254] Table 35

[0255]

[0256] In Example 18, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 36-1 and 36-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20 and A22 that can be used for each aspherical surface S4 and S5 in Example 18.

[0257] Table 36-1

[0258]

[0259] Table 36-2

[0260]

[0261] The optical lens of Example 18 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0262] Example 19

[0263] like Figure 19 As shown, the main difference between the optical lens of Embodiment 19 and Embodiment 1 is that the optical parameters such as the radius of curvature of each lens surface and the lens thickness are different. Table 37 shows the basic parameters of the optical lens of Embodiment 19.

[0264] Table 37

[0265]

[0266] In Example 19, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 38-1 and 38-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 and A32 that can be used for each aspherical surface S4 and S5 in Example 19.

[0267] Table 38-1

[0268]

[0269] Table 38-2

[0270]

[0271] The optical lens of Example 19 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0272] Example 20

[0273] like Figure 20 As shown, the main differences between the optical lens of Embodiment 20 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 S7 of the third lens L3 is concave; and the first side surface S7 of the fourth lens L4 is convex. Table 39 shows the basic parameters of the optical lens of Embodiment 20.

[0274] Table 39

[0275]

[0276] In Example 20, the first side surface S4 and the second side surface S5 of the second lens L2 are both aspherical surfaces. Tables 40-1 and 40-2 give the conic coefficient k and the higher-order coefficients A4, A6, A8, A10, A12, A14, A16, A18, A20, A22, A24, A26, A28, A30 and A32 that can be used for each aspherical surface S4 and S5 in Example 20.

[0277] Table 40-1

[0278]

[0279] Table 40-2

[0280]

[0281] The optical lens of Example 20 can achieve a resolution of 8M, and the resolution quality of each field of view is good, enabling eight-megapixel imaging.

[0282] Tables 41-1 and 41-2 provide the basic parameters of the optical lenses in Examples 1-20, where FOV is in °, θ is in rad, and other parameters are in mm. E1-E20 represent Examples 1-20, respectively.

[0283] Table 41-1

[0284]

[0285] Table 41-2

[0286]

[0287] In summary, the conditional expressions of each embodiment in Examples 1-20 satisfy the relationships shown in Tables 42-1 and 42-2.

[0288] Table 42-1

[0289]

[0290] Table 42-2

[0291]

[0292] This application also provides an electronic device including an optical lens as described in the exemplary embodiments above and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element is disposed on a second side of the optical lens, for example, on an imaging surface, and may be, for example, a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). Light from the first side is imaged on the second side after passing through the optical lens.

[0293] This application also provides an electronic device including an optical lens and a light source as described in the exemplary embodiments above, with the light source located on a second side of the optical lens. Light emitted from the light source is projected onto a first side of the optical lens after passing through it, forming an image or illuminating an area on the first side.

[0294] This application also provides an electronic device, including a first device and a second device. The first device may be, for example, a lidar transmitter, and the second device may be, for example, a lidar receiver. The first device may include 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, and the light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, forming an image or illuminating an area on the first side. The second device may include 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 the second side of the optical lens (e.g., on an imaging surface), and the imaging element may be, for example, a photocoupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The light from the first side is imaged on the second side after passing through the optical lens.

[0295] 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 having negative optical power, wherein the first side surface of the first lens is concave and the second side surface of the first lens is concave; A second lens having positive optical power, wherein the second side surface of the second lens is a convex surface; A third lens with optical power; A fourth lens with optical power; A fifth lens with positive optical power, wherein the first side surface of the fifth lens is convex and the second side surface of the fifth lens is convex; A sixth lens with negative optical power; The fourth lens and the third lens have opposite positive and negative optical power properties; The optical lens has six lenses with optical power. The optical lens satisfies the following conditions: 1.2≤TTL / F≤2.4, 0.65≤F5 / F≤1.65, -2.5≤F1 / F2≤-0.9, and 0.2≤d1 / d5≤0.9; Wherein, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, d1 is the center thickness of the first lens, d5 is the center thickness of the fifth lens, F is the effective focal length of the optical lens, TTL is the total optical length of the optical lens, and F5 is the effective focal length of the fifth lens.

2. The optical lens according to claim 1, characterized in that, The first side surface of the second lens is convex, or the first side surface of the second lens is concave; or... The third lens has positive optical power, and the first side surface of the third lens is convex, and the second side surface of the third lens is convex; or... The third lens has positive optical power, the first side surface of the third lens is convex, and the second side surface of the third lens is concave; or... The third lens has negative optical power, and the first side surface of the third lens is concave, and the second side surface of the third lens is concave; or... The third lens has negative optical power, the first side surface of the third lens is concave, and the second side surface of the third lens is convex; or... The fourth lens has negative optical power, and the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is concave; or... The fourth lens has negative optical power, the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is concave; or... The fourth lens has positive optical power, and the first side surface of the fourth lens is convex, and the second side surface of the fourth lens is convex; or... The fourth lens has positive optical power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex; or... The first side surface of the sixth lens is concave, and the second side surface of the sixth lens is concave; or... The first side surface of the sixth lens is concave, and the second side surface of the sixth lens is convex; or... The first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave; or... The third lens and the fourth lens are cemented together.

3. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies the following condition: 1.2 ≤ R² / F ≤ 25; Wherein, R2 is the center radius of curvature of the second side surface of the first lens, and F is the effective focal length of the optical lens.

4. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies the following condition: -1.65 ≤ F1 / F ≤ -0.8; Wherein, F is the effective focal length of the optical lens, and F1 is the effective focal length of the first lens.

5. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: -20≤F1 / d1≤-7.8; Where F1 is the effective focal length of the first lens, and d1 is the center thickness of the first lens.

6. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: 0.8 ≤ d5 / d56 ≤ 2.7; Wherein, d5 is the center thickness of the fifth lens, and d56 is the center distance between the second side surface of the fifth lens and the first side surface of the sixth lens.

7. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: 0.01 ≤ d²³ / d² ≤ 1.3; Wherein, d2 is the center thickness of the second lens, and d23 is the center distance between the second side surface of the second lens and the first side surface of the third lens.

8. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: 0.08≤d4 / d3≤10; Wherein, d3 is the center thickness of the third lens, and d4 is the center thickness of the fourth lens.

9. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: 0 < (R5×R8) / (R6×R7) ≤ 2; Wherein, R5 is the center radius of curvature of the first side of the third lens, R6 is the center radius of curvature of the second side of the third lens, R7 is the center radius of curvature of the first side of the fourth lens, and R8 is the center radius of curvature of the second side of the fourth lens.

10. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies the following condition: 1.5 ≤ F / H ≤ 1.8; Where F is the effective focal length of the optical lens, and H is the image height corresponding to the maximum field of view of the optical lens.

11. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: 0.2≤|F5 / F4|≤3; Wherein, F4 is the effective focal length of the fourth lens, and F5 is the effective focal length of the fifth lens.

12. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies: 0.85≤(H / 2) / (F×tan(θ / 2))≤1.2; Wherein, H is the image height corresponding to the maximum field of view of the optical lens, F is the effective focal length of the optical lens, and θ is the radian value corresponding to the maximum field of view of the optical lens.

13. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies the following condition: 1.5 ≤ TTL / F ≤ 2.2; Where F is the effective focal length of the optical lens, and TTL is the total optical length of the optical lens.

14. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies the following condition: 0.06 ≤ D / H / F × 1mm ≤ 0.085; Wherein, F is the effective focal length of the optical lens, H is the image height corresponding to the maximum field of view of the optical lens, and D is the maximum aperture corresponding to the maximum field of view of the optical lens.

15. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following conditional expressions: 0 < |F / F34| ≤ 0.5, 0.75 ≤ (R9 + |R10|) / F ≤ 4.15, 0.015 ≤ D / H / FOV×1° ≤ 0.045, 0 < Nd5 / Vd5 ≤ 0.02, 2 ≤ |F34 / F5| ≤ 550, 0.08 ≤ TTL / H / FOV×1° ≤ 0.15, 0.6 ≤ F2 / F ≤ 1.85, -2.5 ≤ F6 / F ≤ -0.5, -1.85 ≤ F5 / F6 ≤ -0.25, 50 ≤ (FOV×F) / H / 1° ≤ 65, -0.3 ≤ R1 / (R2 + d1) < 0, 1 ≤ d(+) / d(-) ≤ 8, and 2 ≤ R2×d12 / F / 1mm ≤ 24; Where, F is the effective focal length of the optical lens, F2 is the effective focal length of the second lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, and F34 is the combined focal length of the third lens and the fourth lens; R1 is the central radius of curvature of the first side of the first lens, R2 is the central radius of curvature of the second side of the first lens, R9 is the central radius of curvature of the first side of the fifth lens, and R10 is the central radius of curvature of the second side of the fifth lens; d1 is the central thickness of the first lens, d(+) is the central thickness of the one with positive optical power among the third lens and the fourth lens, d(-) is the central thickness of the one with negative optical power among the third lens and the fourth lens, and d12 is the central distance between the second side of the first lens and the first side of the second lens; H is the image height corresponding to the maximum field angle of the optical lens, D is the maximum clear aperture corresponding to the maximum field angle of the optical lens, FOV is the maximum field angle of the optical lens, TTL is the total optical length of the optical lens, Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens.

16. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following conditions: 1.85≤R² / F≤8.5, -1.6≤F¹ / F≤-0.9, -2≤F¹ / F²≤-0.95, -18.5≤F¹ / d¹≤-8.65, 1.2≤(R₁₉+|R₁₀|) / F≤3.8, 1≤d₅ / d₅₆≤1.9, 0.015≤d²³ / d²≤ 0.5, 0<|F / F34|≤0.4, 0.1≤d4 / d3≤8, 0.001≤(R5×R8) / (R6×R7)≤1.5, 1.55≤F / H ≤1.75, 0.02≤D / H / FOV×1°≤0.04, 0.012≤Nd5 / Vd5≤0.0185, 2.5≤|F34 / F5|≤350, 0.4≤|F5 / F4|≤2.6, 0.925≤(H / 2) / (F×tan(θ / 2))≤1.1, 1.5≤TTL / F≤2.2, 0.065 ≤D / H / F×1mm≤0.08, 0.09≤TTL / H / FOV×1°≤0.125, 0.7≤F2 / F≤1.7, 0.7≤F5 / F≤1.5 -2.2≤F6 / F≤-0.7, -1.65≤F5 / F6≤-0.4, 54≤(FOV×F) / H / 1°≤60, 0.22≤d1 / d5≤0.85, -0.27≤R1 / (R2+d1)≤-0.025, 1.1≤d(+) / d(-)≤7.5 and 2.5≤R2×d12 / F / 1mm≤20; Wherein, F is the effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, and F34 is the combined focal length of the third lens and the fourth lens. R1 is the center radius of curvature of the first side surface of the first lens, R2 is the center radius of curvature of the second side surface of the first lens, R5 is the center radius of curvature of the first side surface of the third lens, R6 is the center radius of curvature of the second side surface of the third lens, R7 is the center radius of curvature of the first side surface of the fourth lens, R8 is the center radius of curvature of the second side surface of the fourth lens, R9 is the center radius of curvature of the first side surface of the fifth lens, and R10 is the center radius of curvature of the second side surface of the fifth lens. d1 is the center thickness of the first lens, d2 is the center thickness of the second lens, d3 is the center thickness of the third lens, d4 is the center thickness of the fourth lens, d5 is the center thickness of the fifth lens, d12 is the center distance between the second side surface of the first lens and the first side surface of the second lens, d23 is the center distance between the second side surface of the second lens and the first side surface of the third lens, d56 is the center distance between the second side surface of the fifth lens and the first side surface of the sixth lens, d(+) is the center thickness of the third lens and the fourth lens that have positive optical power, and d(-) is the center thickness of the third lens and the fourth lens that have negative optical power. H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum aperture corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens.

17. The optical lens according to any one of claims 1 to 2, characterized in that, The optical lens satisfies at least one of the following conditions: 2.867≤R² / F≤8, -1.5≤F¹ / F≤-1.074, -1.533≤F¹ / F²≤-1, -15.38≤F¹ / d¹≤-8.501, 1.706≤(R₁₉+|R₁₀|) / F≤3.749, 1.118≤d₅ / d₅₆≤1.85, 0.021≤d²³ / d²≤0. .432, 0.004≤|F / F34|≤0.312, 0.14≤d4 / d3≤6.429, 0.002≤(R5×R8) / (R6×R7)≤1.267, 1. 629≤F / H≤1.689, 0.032≤D / H / FOV×1°≤0.034, 2.729≤|F34 / F5|≤325.915, 0.836≤|F5 / F4 |≤2.484, 0.957≤(H / 2) / (F×tan(θ / 2))≤0.992, 1.906≤TTL / F≤2, 0.072≤D / H / F×1mm≤0.0 76. 0.093≤TTL / H / FOV×1°≤0.097, 0.762≤F2 / F≤1.5, 0.804≤F5 / F≤1.405, -1.996≤F6 / F≤ -0.814, -1.408≤F5 / F6≤-0.469, 56.029≤(FOV×F) / H / 1°≤58.093, 0.259≤d1 / d5≤0.797, -0.26≤R1 / (R2+d1)≤-0.038, 1.144≤d(+) / d(-)≤7.143 and 3.359≤R2×d12 / F / 1mm≤17.523; Wherein, F is the effective focal length of the optical lens, F1 is the effective focal length of the first lens, F2 is the effective focal length of the second lens, F4 is the effective focal length of the fourth lens, F5 is the effective focal length of the fifth lens, F6 is the effective focal length of the sixth lens, and F34 is the combined focal length of the third lens and the fourth lens. R1 is the center radius of curvature of the first side surface of the first lens, R2 is the center radius of curvature of the second side surface of the first lens, R5 is the center radius of curvature of the first side surface of the third lens, R6 is the center radius of curvature of the second side surface of the third lens, R7 is the center radius of curvature of the first side surface of the fourth lens, R8 is the center radius of curvature of the second side surface of the fourth lens, R9 is the center radius of curvature of the first side surface of the fifth lens, and R10 is the center radius of curvature of the second side surface of the fifth lens. d1 is the center thickness of the first lens, d2 is the center thickness of the second lens, d3 is the center thickness of the third lens, d4 is the center thickness of the fourth lens, d5 is the center thickness of the fifth lens, d12 is the center distance between the second side surface of the first lens and the first side surface of the second lens, d23 is the center distance between the second side surface of the second lens and the first side surface of the third lens, d56 is the center distance between the second side surface of the fifth lens and the first side surface of the sixth lens, d(+) is the center thickness of the third lens and the fourth lens that have positive optical power, and d(-) is the center thickness of the third lens and the fourth lens that have negative optical power. H is the image height corresponding to the maximum field of view of the optical lens, D is the maximum aperture corresponding to the maximum field of view of the optical lens, FOV is the maximum field of view of the optical lens, θ is the radian value corresponding to the maximum field of view of the optical lens, TTL is the total optical length of the optical lens, Nd5 is the refractive index of the fifth lens, and Vd5 is the Abbe number of the fifth lens.

18. An electronic device, characterized in that, include: Optical lens according to any one of claims 1 to 17; as well as At least one of an imaging element and a light source; The imaging element is used to convert the optical image or optical information formed by the optical lens into an electrical signal; The light source is located on the second side of the optical lens. The light emitted by the light source is projected onto the first side of the optical lens after passing through the optical lens, and forms an image or illuminated area on the first side of the optical lens.

Images