Optical lens and imaging device

Abstract

The application discloses an optical lens and an imaging device. The optical lens comprises, in sequence from a first side to a second side along an optical axis, a first lens, a second lens with optical power, a third lens, a fourth lens with optical power, a fifth lens with optical power and a sixth lens with optical power. The first lens has negative optical power, a first side surface thereof is a concave surface, and a second side surface thereof is a concave surface. The third lens has positive optical power, and a first side surface thereof is a convex surface.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of optical devices, in particular to a six-piece optical lens and an imaging device. BACKGROUND

[0002] With the continuous development of science and technology, vehicle-mounted lenses have been widely applied. However, there are still many deficiencies in vehicle-mounted lenses. For example, when the vehicle-mounted lens is applied in high and low temperature environments, the image formed is not clear, and after recovering from high and low temperature environments to normal temperature environments, the resolving power of the vehicle-mounted lens is difficult to meet the requirements; for another example, the vehicle-mounted lens is prone to produce strong ghost images, which will lead to misjudgment of the current road conditions by the driving assistance system; for another example, the vehicle-mounted lens has chromatic aberration, astigmatism, distortion and other aberration problems, which will affect the imaging quality of the vehicle-mounted lens; for another example, the light transmission capability of the vehicle-mounted lens is not strong, which is difficult to adapt to the environment with weak light such as night or rainy day; for another example, when the vehicle-mounted lens is used in close range, the resolving power of the vehicle-mounted lens is poor and the sensitivity is high, which leads to poor imaging quality of the vehicle-mounted lens, low assembly yield and difficult production. SUMMARY

[0003] The present application provides an optical lens and an imaging device which can at least solve or partially solve at least one problem or other problems existing in the prior art.

[0004] An aspect of the present application provides an optical lens, which comprises, in order from a first side to a second side along an optical axis, a first lens, a second lens having optical power, a third lens, a fourth lens having optical power, a fifth lens having optical power, and a sixth lens having optical power; wherein the first lens has negative optical power, the first side thereof is a concave surface, and the second side thereof is a concave surface; and the third lens has positive optical power, the first side thereof is a convex surface.

[0005] According to an example embodiment of the present application, the second lens has positive optical power, the first side of the second lens is a convex surface, and the second side of the second lens is a convex surface or a concave surface.

[0006] According to an example embodiment of the present application, the second lens has negative optical power, the first side of the second lens is a concave surface, and the second side of the second lens is a convex surface.

[0007] According to an example embodiment of the present application, the second side of the third lens is a convex surface or a concave surface.

[0008] According to an example embodiment of the present application, the fourth lens has negative optical power, the first side of the fourth lens is a convex surface, and the second side of the fourth lens is a concave surface.

[0009] According to an example embodiment of the present application, the fourth lens has positive focal power, the first side surface of the fourth lens is concave, and the second side surface of the fourth lens is convex.

[0010] According to an example embodiment of the present application, the fifth lens has positive focal power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex or concave.

[0011] According to an example embodiment of the present application, the fifth lens has negative focal power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

[0012] According to an example embodiment of the present application, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0013] According to an example embodiment of the present application, the sixth lens has positive focal power, the first side surface of the sixth lens is convex or concave, and the second side surface of the sixth lens is convex.

[0014] According to an example embodiment of the present application, the sixth lens has negative focal power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

[0015] According to an example embodiment of the present application, the optical back focal length BFL of the optical lens and the total track length TTL of the optical lens satisfy: BFL / TTL≥0.2.

[0016] According to an example embodiment of the present application, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the maximum light passing aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens satisfy: (F×θ) / D≥0.35.

[0017] According to an example embodiment of the present application, the total focal length F of the optical lens and the image height H corresponding to the maximum field of view of the optical lens satisfy: 0.4≤F / H≤1.3.

[0018] According to an example embodiment of the present application, the total focal length F of the optical lens, the radian value θ of the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: |(H-F×θ) / (F×θ)|≤0.2.

[0019] According to an example embodiment of the present application, the maximum light passing aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: (D×180°) / (H×FOV)≤5.

[0020] According to an example embodiment of the present application, the focal length value F of the optical lens and the optical back focal length BFL of the optical lens satisfy: F / BFL≤1.2.

[0021] According to an example embodiment of the present application, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens satisfy: 0.25≤|F3 / F4|≤3.5.

[0022] According to an example embodiment of the present application, the central thickness d7 of the fourth lens on the optical axis, the central thickness d8 of the fifth lens on the optical axis and the total track length TTL of the optical lens satisfy: (d7+d8) / TTL≤0.35.

[0023] According to an example embodiment of the present application, the focal length value F2 of the second lens and the total focal length value F of the optical lens satisfy: |F2 / F|≥5.

[0024] According to an example embodiment of the present application, the sagittal height SAG11 of the first side surface of the sixth lens and the maximum clear aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy: |SAG11 / (D11×2)|≤0.1.

[0025] According to an example embodiment of the present application, the focal length value F3 of the third lens and the total focal length value F of the optical lens satisfy: F3 / F≤5.5.

[0026] According to an example embodiment of the present application, the maximum clear aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: (D11×D) / H≤7.5mm.

[0027] According to an example embodiment of the present application, the radius of curvature R5 of the first side surface of the third lens, the radius of curvature R6 of the second side surface of the third lens and the total focal length value F of the optical lens satisfy: |F / R5|+|F / R6|≤2.

[0028] According to an example embodiment of the present application, the sagittal height SAG12 of the second side surface of the sixth lens and the maximum clear aperture D12 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy: |arctan(SAG12 / D12)|≤0.2°.

[0029] According to an example embodiment of the present application, the focal length value F6 of the sixth lens and the total focal length value F of the optical lens satisfy: |F6 / F|≥2.

[0030] According to an example embodiment of the present application, an optical total track length TTL of the optical lens and a total focal length F of the optical lens satisfy: TTL / F≤5.

[0031] According to an example embodiment of the present application, a radius of curvature R5 of the first side surface of the third lens and a total focal length F of the optical lens satisfy: 0.2≤R5 / F≤4.

[0032] According to an example embodiment of the present application, an optical total track length TTL of the optical lens and an air gap d2 of the first lens and the second lens on the optical axis satisfy: TTL / d2≥8.

[0033] According to an example embodiment of the present application, a lens group length TL of the optical lens and an air gap d9 of the fifth lens and the sixth lens on the optical axis satisfy: d9 / TL≥0.01.

[0034] According to an example embodiment of the present application, a radius of curvature R9 of the second side surface of the fifth lens and a radius of curvature R8 of the first side surface of the fifth lens satisfy: |R9 / R8|≥2.

[0035] According to an example embodiment of the present application, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens.

[0036] According to an example embodiment of the present application, at least two lenses among the first lens to the sixth lens are configured as aspherical lenses.

[0037] Another aspect of the present application provides an optical lens comprising, in order from a first side to a second side along an optical axis, a first lens having a negative optical power, a second lens having an optical power, a third lens having a positive optical power, a fourth lens having an optical power, a fifth lens having an optical power, and a sixth lens having an optical power; wherein an optical back focal length BFL of the optical lens and an optical total track length TTL of the optical lens satisfy: BFL / TTL≥0.2.

[0038] According to an example embodiment of the present application, the first side surface of the first lens is a concave surface, and the second side surface of the first lens is a concave surface.

[0039] According to an example embodiment of the present application, the second lens has a positive optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a convex surface or a concave surface.

[0040] According to an example embodiment of the present application, the second lens has a negative optical power, the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface.

[0041] According to an exemplary embodiment of the present application, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface or a concave surface.

[0042] According to an exemplary embodiment of the present application, the fourth lens has negative optical power, the first side surface of the fourth lens is a convex surface, and the second side surface of the fourth lens is a concave surface.

[0043] According to an exemplary embodiment of the present application, the fourth lens has positive refractive power, the first side surface of the fourth lens is a concave surface, and the second side surface of the fourth lens is a convex surface.

[0044] According to an exemplary embodiment of the present application, the fifth lens has positive optical 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 or a concave surface.

[0045] According to an exemplary embodiment of the present application, the fifth lens has negative optical power, the first side surface of the fifth lens is a concave surface, and the second side surface of the fifth lens is a convex surface.

[0046] According to an exemplary embodiment of the present application, the fourth lens and the fifth lens are cemented to form a cemented lens.

[0047] According to an exemplary embodiment of the present application, the sixth lens has positive refractive power, the first side surface of the sixth lens is a convex surface or a concave surface, and the second side surface of the sixth lens is a convex surface.

[0048] According to an exemplary embodiment of the present application, the sixth lens has negative optical power, the first side surface of the sixth lens is a convex surface, and the second side surface of the sixth lens is a concave surface.

[0049] According to an exemplary embodiment of the present application, the focal length value F of the entire optical lens group, the arc value θ of the maximum field of view angle of the optical lens, and the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens satisfy: (F×θ) / D≥0.35.

[0050] According to an exemplary embodiment of the present application, the entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy: 0.4≤F / H≤1.3.

[0051] According to an exemplary embodiment of the present application, the entire focal length value F of the optical lens, the arc value θ of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: |(HF×θ) / (F×θ)|≤0.2.

[0052] According to an example embodiment of the present application, a maximum aperture D of a first side surface of the first lens corresponding to the maximum field of view of the optical lens, an image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy: (D*180°) / (H*FOV)≤5.

[0053] According to an example embodiment of the present application, a total focal length F of the optical lens and an optical back focal length BFL of the optical lens satisfy: F / BFL≤1.2.

[0054] According to an example embodiment of the present application, a focal length F3 of the third lens and a focal length F4 of the fourth lens satisfy: 0.25≤|F3 / F4|≤3.5.

[0055] According to an example embodiment of the present application, a central thickness d7 of the fourth lens on the optical axis, a central thickness d8 of the fifth lens on the optical axis, and a total track length TTL of the optical lens satisfy: (d7+d8) / TTL≤0.35.

[0056] According to an example embodiment of the present application, a focal length F2 of the second lens and a total focal length F of the optical lens satisfy: |F2 / F|≥5.

[0057] According to an example embodiment of the present application, a sagittal height SAG11 of the first side surface of the sixth lens and a maximum aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens satisfy: |SAG11 / (D11*2)|≤0.1.

[0058] According to an example embodiment of the present application, a focal length F3 of the third lens and a total focal length F of the optical lens satisfy: F3 / F≤5.5.

[0059] According to an example embodiment of the present application, a maximum aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, a maximum aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and an image height H corresponding to the maximum field of view of the optical lens satisfy: (D11*D) / H≤7.5mm.

[0060] According to an example embodiment of the present application, a radius of curvature R5 of the first side surface of the third lens, a radius of curvature R6 of the second side surface of the third lens, and a total focal length F of the optical lens satisfy: |F / R5|+|F / R6|≤2.

[0061] According to an example embodiment of the present application, the sagittal height SAG12 of the second side surface of the sixth lens satisfies: |arctan(SAG12 / D12)|≤0.2°, where D12 is the maximum entrance pupil of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens.

[0062] According to an example embodiment of the present application, the focal length value F6 of the sixth lens satisfies: |F6 / F|≥2, where F is the total focal length value of the optical lens.

[0063] According to an example embodiment of the present application, the total track length TTL of the optical lens satisfies: TTL / F≤5, where F is the total focal length value of the optical lens.

[0064] According to an example embodiment of the present application, the radius of curvature R5 of the first side surface of the third lens satisfies: 0.2≤R5 / F≤4, where F is the total focal length value of the optical lens.

[0065] According to an example embodiment of the present application, the total track length TTL of the optical lens satisfies: TTL / d2≥8, where d2 is the air separation of the first lens and the second lens on the optical axis.

[0066] According to an example embodiment of the present application, the lens group length TL of the optical lens satisfies: d9 / TL≥0.01, where d9 is the air separation of the fifth lens and the sixth lens on the optical axis.

[0067] According to an example embodiment of the present application, the radius of curvature R9 of the second side surface of the fifth lens satisfies: |R9 / R8|≥2, where R8 is the radius of curvature of the first side surface of the fifth lens.

[0068] According to an example embodiment of the present application, the optical lens further comprises a diaphragm, which is arranged between the third lens and the fourth lens.

[0069] According to an example embodiment of the present application, at least two lenses among the first lens to the sixth lens are configured as aspherical lenses.

[0070] Another aspect of the present application provides an imaging device comprising the optical lens in the above example embodiments and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

[0071] The present application employs, for example, six lenses with optical power, and at least one of the following beneficial effects can be achieved by optimizing the shape and optical power of each lens: high light throughput, miniaturization, small aperture, long back focal length, high resolution, small distortion, weak ghost image, low sensitivity, good temperature performance, high imaging quality, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0072] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings, in which:

[0073] Figure 1 A structural diagram of an optical lens according to Embodiment 1 of the present application is shown;

[0074] Figure 2 A structural diagram of an optical lens according to Embodiment 2 of the present application is shown;

[0075] Figure 3 A structural diagram of an optical lens according to Embodiment 3 of the present application is shown;

[0076] Figure 4 A structural diagram of an optical lens according to Embodiment 4 of the present application is shown;

[0077] Figure 5 A structural diagram of an optical lens according to Embodiment 5 of the present application is shown;

[0078] Figure 6 A structural diagram of an optical lens according to Embodiment 6 of the present application is shown;

[0079] Figure 7 A structural diagram of an optical lens according to Embodiment 7 of the present application is shown;

[0080] Figure 8 A structural diagram of an optical lens according to Embodiment 8 of the present application is shown;

[0081] Figure 9 A structural diagram of an optical lens according to Embodiment 9 of the present application is shown;

[0082] Figure 10 A structural diagram of an optical lens according to Embodiment 10 of the present application is shown;

[0083] Figure 11 A structural diagram of an optical lens according to Embodiment 11 of the present application is shown;

[0084] Figure 12 A structural diagram of an optical lens according to Embodiment 12 of the present application is shown;

[0085] Figure 13 A structural diagram of an optical lens according to Embodiment 13 of the present application is shown; and

[0086] Figure 14 A structural diagram of an optical lens according to Embodiment 14 of the present application is shown. DETAILED DESCRIPTION

[0087] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It is to be noted that these detailed description of embodiments are merely exemplary of the application, and are not intended to limit the scope of the application in any way. Throughout this application, like reference numerals will be used to refer to like elements throughout.

[0088] It is to be noted that the terms first, second, third, etc. are merely used to distinguish one feature from another, and do not denote any limitation on the features. Thus, the first lens discussed below can also be referred to as the second lens or the third lens without departing from the teachings of the present application.

[0089] In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shape of the spherical or aspherical surface shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The drawings are merely exemplary and are not drawn to scale.

[0090] Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the position of the convex surface 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 position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region.

[0091] It is also to be understood that the use of the terms "include", "includes" and / or "including", when used in this specification, indicates the existence of the stated features, elements and / or components but does not preclude the presence or addition of one or more other features, elements, components and / or groups thereof. Also, when describing the embodiments of the present application, the use of "may" indicates that one or more embodiments of the present application. Also, the term "exemplary" is intended to mean an example or an illustration.

[0092] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0093] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0094] The features, principles, and other aspects of the present application are described in detail below.

[0095] The optical lens according to an exemplary embodiment of the present application may include, for example, six lenses having optical power, namely a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, and the six lenses are arranged in sequence from the first side to the second side along the optical axis.

[0096] In an exemplary embodiment, the optical lens may be used, for example, as an imaging lens. In this case, the first side of the optical lens may be the object side, and the second side may be the image side. Light from the object side may form an image on the image side. The second side of the optical lens is provided with an imaging surface of the optical lens.

[0097] In exemplary embodiments, the optical lens can be used, for example, as a projection lens or a laser radar transmitter lens. In this case, the second side of the optical lens can be the image source side, and the first side can be the imaging side. Light from the image source side can be imaged on the imaging side. The second side of the optical lens is provided with the image source surface of the optical lens.

[0098] In an exemplary embodiment, the first 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, concave. By designing the first lens in this manner, the light path transitions smoothly and diverges after passing through the first side surface of the first lens. This results in slower convergence of the rearward light and an upward trend of light at the edge of the field of view. This facilitates moving the image point on the second side away from the optical axis and aligning with a large photosensitive element, resulting in a larger image.

[0099] 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, concave. Designing the second lens as a positive meniscus lens with a convex first side surface facilitates converging light and allowing it to transition smoothly to the rear, reducing the height of the light incident on the rear lens and thereby reducing the aperture of the rear lens. Simultaneously, designing the second side surface of the second lens as a concave surface diverges the light passing through the second lens, resulting in an upward trend in the light emitted from the second side surface of the second lens. This improves the resolution of the optical lens and achieves high resolution.

[0100] In an exemplary embodiment, the second lens element 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. Designing the second lens element as a biconvex positive lens facilitates light convergence. In combination with the third lens element, this ensures that light enters the lens element smoothly and reaches the rear, thereby improving the resolution of the optical lens.

[0101] In an exemplary embodiment, the second lens can have a negative focal power, and its first side can be concave, for example, and its second side can be convex. By designing the second lens in this form, the light rays can be made to transition smoothly, and the light rays can continue to diverge after passing through the first side of the second lens, thereby causing the rear light rays to converge more slowly, and the light rays of the edge field to have an upward trend, which, in combination with the first lens, is conducive to achieving matching with a large photosensitive element.

[0102] In an exemplary embodiment, the third lens can have a positive focal power, and its first side can be convex, for example, and its second side can be convex. By designing the third lens as a positive lens, the light rays can be converged and made to transition smoothly, and by designing the first side and the second side of the third lens to be convex, the angle of the incident light rays can be compressed, causing the light rays exiting from the second lens to smoothly enter the rear, which is conducive to reducing the aperture of the rear lens and further condensing the light rays entering the rear optical system, reducing the optical path of the rear light rays, achieving a shorter TTL, and further miniaturization. The second lens with a positive focal power in combination with the third lens with a positive focal power can further correct the aberrations generated by the front lens group, reduce the aberrations, and further converge the light rays.

[0103] In an exemplary embodiment, the third lens can have a positive focal power, and its first side can be convex, and its second side can be concave. By designing the third lens in this form, the light rays can be converged, the angle of the incident light rays can be compressed, and the light rays exiting from the second lens can smoothly enter the rear, further making the light rays transition smoothly, which is conducive to achieving high resolution of the optical lens.

[0104] In an exemplary embodiment, the fourth lens can have a negative focal power, and its first side can be convex, and its second side can be concave. By designing the fourth lens as a negative meniscus lens, the light rays exiting from the third lens can be collected. Since the angle of incidence of the light rays at the first side of the fourth lens is small, by designing the first side of the fourth lens to be convex, the light rays can be converged, enabling the light rays to smoothly reach the rear, thereby achieving a large field angle of the optical lens, and by designing the second side of the fourth lens to be concave, the light rays exiting from the first side of the fourth lens can be prevented from being too converged, which is conducive to controlling the aperture of the rear lens. The fourth lens can be combined with a fifth lens with a convex first side, which is conducive to converging the light rays and making the light rays transition smoothly, thereby achieving small distortion of the optical lens.

[0105] In the exemplary embodiment, the fourth lens can have positive focal power, and its first side can be concave, and its second side can be convex. The fourth lens first diverges and then converges the light rays emitted from the third lens, and the high-angle edge light rays are at a height lower than that of the first side of the fourth lens on the second side of the fourth lens, which is advantageous for reducing the aperture of the rear lens.

[0106] In the exemplary embodiment, the fifth lens can have positive focal power, and its first side can be convex, and its second side can be concave. By designing the fifth lens as a convex meniscus lens with the first side being convex, it is advantageous for converging the light rays and making the light ray trend transition smoothly to the rear, reducing the height of the light rays incident to the rear, thereby reducing the aperture of the rear lens, and at the same time, designing the second side of the fifth lens as concave, which can properly diverge the light rays passing through the second side of the fifth lens, so that the light rays have an upward trend, thereby achieving matching with a large photosensitive element to obtain a larger picture.

[0107] In the exemplary embodiment, the fifth lens can have positive focal power, and its first side can be convex, and its second side can be convex. By designing the fifth lens as a positive lens, it is advantageous for converging the light rays and making the light ray trend transition smoothly, and at the same time, designing the first side and the second side of the fifth lens as convex, which can compress the angle of the incident light rays, so that the light rays emitted from the fourth lens smoothly enter to the rear, which is advantageous for reducing the aperture of the rear lens.

[0108] In the exemplary embodiment, the fifth lens can have negative focal power, and its first side can be concave, and its second side can be convex. When the fourth lens is a concave-convex positive lens, the fifth lens collects the light rays emitted from the fourth lens and makes the light ray trend transition smoothly. The light rays emitted from the fourth lens continue to diverge after passing through the first side of the fifth lens, so that the rear light rays converge slowly, and the light rays of the edge field have an upward trend, which is advantageous for achieving matching with a large photosensitive element in combination with the fourth lens.

[0109] In the example embodiment, the fourth lens and the fifth lens are cemented to form a cemented lens. By using the cemented lens, chromatic aberration of the optical lens can be corrected, the total length of the optical lens can be reduced, and the light rays can be smoothly transitioned to the rear system, thereby optimizing the performance of the optical lens such as the Chief Ray Angle (CRA), the relative illumination, the distortion, and the like. In addition, by using the cemented lens, the assembly components between the fourth lens and the fifth lens can be reduced, which is conducive to reducing the process and the overall weight, reducing the cost, reducing the light energy loss caused by the reflection between the lenses, improving the illumination of the image plane, weakening the ghost image, smoothly transitioning the light rays when passing through the cemented surface, reducing the tolerance sensitivity of the lens during assembly, and reasonably distributing the focal lengths of the fourth lens and the fifth lens. Both lenses are made of glass, which helps to achieve thermal compensation and improve the performance of the optical lens at different temperatures. As an example, the fourth lens can be made of a material with high refractive index and low Abbe number, and the fifth lens can be made of a material with low refractive index and high Abbe number. The cementing of the two kinds of material lenses can effectively correct the chromatic aberration of the optical lens. As an example, the fourth lens has a negative optical power, and the fifth lens has a positive optical power. By making the fourth lens a negative lens, the edge light rays and the central light rays of each field of view can be clearly distinguished, which is conducive to the aberration correction of the central and edge light rays of each field of view, realizes high resolution of the optical lens, and makes the fifth lens a positive lens, which can make the light rays emitted from the fourth lens smoothly transition to the rear, reducing the height of the light rays incident to the rear.

[0110] In the example embodiment, the sixth lens can have a positive optical power, and the first side surface thereof can be, for example, a convex surface, and the second side surface thereof can be, for example, a convex surface. By designing the sixth lens as a biconvex positive lens, the angle of the incident light rays can be compressed, and the light rays emitted from the fifth lens can be smoothly converged to the imaging plane, which is conducive to reducing the aperture of the rear chip.

[0111] In the example embodiment, the sixth lens can have a positive optical power, and the first side surface thereof can be, for example, a concave surface, and the second side surface thereof can be, for example, a convex surface. By designing the sixth lens in the above form, the light rays emitted from the fifth lens can be first diverged and then converged, and the height of the large-angle edge light rays at the first side surface of the sixth lens is lower than the height of the second side surface of the sixth lens, which is conducive to improving the resolving power of the optical lens, and the reflection with the photosensitive chip or the protective glass is not easy, the energy of the ghost image on the imaging picture is reduced, and the interference is reduced.

[0112] In an example embodiment, the sixth lens can have a negative focal length, the first side thereof can be convex, and the second side thereof can be concave. The sixth lens collects light rays exiting from the fifth lens. By designing the first side of the sixth lens to be convex, more marginal field light rays can be collected, and the light rays can smoothly reach the imaging surface, thereby achieving a large field angle of the optical lens. By designing the second side of the sixth lens to be concave, the light rays exiting from the first side of the sixth lens can be prevented from being too convergent, and the back-end chip aperture can be adjusted.

[0113] In an example embodiment, at least two lenses among the first lens to the sixth lens are configured as aspherical lenses. For example, the second lens and the sixth lens are configured as aspherical lenses. By configuring at least two lenses among the first lens to the sixth lens as aspherical lenses, aberration of the optical lens can be corrected, and resolution of the optical lens can be improved.

[0114] In an example embodiment, the optical lens further includes a diaphragm, which can be disposed between the third lens and the fourth lens. By disposing the diaphragm between the third lens and the fourth lens, the light rays entering the optical lens can be effectively collected, the aperture of the back-end lens of the optical lens can be reduced, and the assembly sensitivity of the optical lens can be reduced. It should be understood that the diaphragm disposed between the third lens and the fourth lens is only exemplary, and the present application does not specifically limit this. According to actual needs, the diaphragm can also be disposed at other positions.

[0115] In an example embodiment, the optical lens further includes a filter between the sixth lens and the imaging surface or the image source surface, to filter light rays having different wavelengths. The optical lens can further include a protective glass between the filter and the imaging surface, to prevent internal elements (for example, a chip) of the optical lens from being damaged.

[0116] In an example embodiment, the optical lens can further include a photosensitive element disposed on the second side. Optionally, the photosensitive element disposed on the second side can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS).

[0117] In the example embodiments, the optical back focal length BFL of the optical lens and the total track length TTL of the optical lens can satisfy: BFL / TTL≥0.2. In an example, BFL / TTL≥0.25, and further, 0.275≤BFL / TTL≤0.7. Reasonably controlling the mutual relationship between the optical back focal length of the optical lens and the total track length of the optical lens can make the optical lens satisfy the special requirement of long back focal length, ensure that the light rays exiting through the second side surface of the sixth lens and reaching the imaging surface have a relatively gentle trend, be beneficial to the gentle transition of light rays, reduce the sensitivity of the optical lens, improve the resolving power of the optical lens, and at the same time, can also reserve space for optical element installation and focusing adjustment, and avoid interference of optical elements.

[0118] In the example embodiments, the total focal length F of the optical lens, the radian value θ of the maximum field angle of the optical lens, and the maximum light passing aperture D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens can satisfy: (F×θ) / D≥0.35. In an example, 0.65≤(F×θ) / D≤2. Reasonably controlling the mutual relationship between the total focal length of the optical lens, the radian value of the maximum field angle of the optical lens, and the maximum light passing aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens can make the front end aperture of the optical lens smaller, reduce the volume of the optical lens, and further realize the miniaturization of the optical lens.

[0119] In the example embodiments, the total focal length F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens can satisfy: 0.4≤F / H≤1.3. In an example, 0.5≤F / H≤1.0. In the case of a certain image height, the smaller the total focal length of the optical lens, the greater the distortion of the optical lens, which means that the total focal length of the optical lens not only affects the imaging effect of the central region of the optical lens, but also affects the distortion of the edge field. The distortion of the edge field increases with the decrease of the total focal length of the optical lens, that is, the small total focal length of the optical lens is not conducive to the realization of small distortion, and affects the imaging effect of the edge field and the performance of the entire optical system. Therefore, by limiting the ratio of the total focal length of the optical lens to the image height corresponding to the maximum field angle of the optical lens within a reasonable range, the resolving power of the optical lens can be improved.

[0120] In the example implementation, the whole set of focal length values F of the optical lens, the radian value of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens can satisfy: |(H-F*theta) / (F*theta)|<=0.2. In the example, |(H-F*theta) / (F*theta)|<=0.1. Reasonably controlling the mutual relationship among the whole set of focal length values F of the optical lens, the radian value of the maximum field of view angle of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens can increase the focal length of the optical lens without changing the field of view angle and the imaging surface size of the optical lens, highlight the imaging effect of the central region of the imaging surface of the optical lens, and facilitate the realization of small distortion of the optical lens.

[0121] In the example implementation, the maximum light passing aperture D of the first side face of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle FOV of the optical lens can satisfy: (D*180°) / (H*FOV)<=5. In the example, (D*180°) / (H*FOV)<=3.5. Reasonably controlling the mutual relationship among the maximum light passing aperture of the first side face of the first lens corresponding to the maximum field of view angle of the optical lens, the image height H corresponding to the maximum field of view angle of the optical lens, and the maximum field of view angle of the optical lens facilitates the reduction of the front aperture of the optical lens and the miniaturization of the optical lens when the maximum field of view angle of the optical lens and the image height corresponding to the maximum field of view angle of the optical lens are determined.

[0122] In the example implementation, the whole set of focal length values F of the optical lens and the optical back focal length BFL of the optical lens can satisfy: F / BFL<=1.2. In the example, 0.60<=F / BFL<=0.95. Reasonably controlling the mutual relationship between the focal length value of the optical lens and the optical back focal length of the optical lens helps the optical lens meet the special requirement of long back focal length, while ensuring that the light rays exiting through the second side face of the sixth lens and hitting the imaging surface have a relatively gentle trend, which is beneficial to the gentle transition of light rays and the reduction of sensitivity of the optical lens.

[0123] In the example implementation, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens can satisfy: 0.25<=|F3 / F4|<=3.5. In the example, 0.5<=|F3 / F4|<=2. Reasonably controlling the mutual relationship between the focal length value of the third lens and the focal length value of the fourth lens can make the focal length values of the third lens and the fourth lens similar, which is beneficial to the gentle transition of light rays between the third lens and the fourth lens and the improvement of the image quality of the optical lens.

[0124] In the example implementation, the central thickness d7 of the fourth lens on the optical axis, the central thickness d8 of the fifth lens on the optical axis, and the total optical length TTL of the optical lens can satisfy: (d7+d8) / TTL≤0.35. In the example, 0.1≤(d7+d8) / TTL≤0.25. When the medium thickness ratio of the cemented lens formed by the fourth lens and the fifth lens is too large, the regulation ability of the front end lens to light is reduced, and the light at the large angle of incidence position is limited at the position of the front end lens, thereby causing the relative luminance of the optical lens to be low. By restricting the ratio of the sum of the central thicknesses of the fourth lens and the fifth lens on the optical axis to the total optical length of the optical lens within a reasonable range, the medium thickness of the cemented lens can be reasonably set when the total optical length of the optical lens is unchanged, the regulation ability of the optical lens to light is enhanced, more light is beneficial to be regulated into the rear system, and the relative luminance of the optical lens is improved.

[0125] In the example implementation, the focal length value F2 of the second lens and the total focal length value F of the optical lens can satisfy: |F2 / F|≥5. In the example, 8≤|F2 / F|≤120, and further, 10≤|F2 / F|≤100. The second lens has a greater influence on the thermal compensation of the optical lens. By reasonably allocating the focal length value of the second lens, light can be smoothly entered into the optical system, which is beneficial to collect the edge field of view light and also beneficial to the optical lens to maintain good resolution at high and low temperatures, thereby ensuring that the optical lens has good temperature performance. The second lens can be preferably a plastic lens.

[0126] In the example implementation, the sagittal height SAG11 of the first side surface of the sixth lens and the maximum light passing aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens can satisfy: |SAG11 / (D11*2)|≤0.1. In the example, |SAG11 / (D11*2)|≤0.08. Reasonably controlling the mutual relationship between the sagittal height of the first side surface of the sixth lens and the maximum light passing aperture of the first side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens can make the sagittal height of the first side surface of the sixth lens smaller, which is helpful for the smooth transition of the light path and reduces the sensitivity of the optical lens.

[0127] In the example implementation, the focal length value F3 of the third lens and the total focal length value F of the optical lens can satisfy: F3 / F≤5.5. In the example, 0.15≤F3 / F≤3.5. Reasonably controlling the mutual relationship between the focal length value of the third lens and the total focal length value of the optical lens can make the focal length value of the third lens be positive and within a certain interval, which is helpful for balancing various aberrations of the optical lens.

[0128] In an example embodiment, a maximum light passing aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens, a maximum light passing aperture D of the first side surface of the first lens, and an image height H of the optical lens corresponding to the maximum field of view angle of the optical lens can satisfy: (D11 x D) / H ≤ 7.5 mm. In an example, 3 mm ≤ (D11 x D) / H ≤ 6.5 mm. Reasonably controlling the mutual relationship among the maximum light passing aperture of the first side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens, the maximum light passing aperture of the first side surface of the first lens, and the image height of the optical lens can make the rear end of the optical lens have a small aperture, so as to ensure the small aperture of the front end of the optical lens while meeting the processability of the rear end lens.

[0129] In an example embodiment, a curvature radius R5 of the first side surface of the third lens, a curvature radius R6 of the second side surface of the third lens, and a total focal length F of the optical lens can satisfy: |F / R5| + |F / R6| ≤ 2. In an example, |F / R5| + |F / R6| ≤ 1.5. Reasonably controlling the mutual relationship among the total focal length of the optical lens and the curvature radii of the first side surface and the second side surface of the third lens can limit the surface curvature of the third lens within a reasonable range, thereby assisting the incident light to enter the optical lens and effectively correcting the astigmatism, and improving the imaging quality of the optical lens.

[0130] In an example embodiment, a sagittal height SAG12 of the second side surface of the sixth lens and a maximum light passing aperture D12 of the second side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens can satisfy: |arctan(SAG12 / D12)| ≤ 0.2°. In an example, |arctan(SAG12 / D12)| ≤ 0.1°. Reasonably controlling the mutual relationship between the sagittal height of the second side surface of the sixth lens and the maximum light passing aperture of the second side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens can constrain the opening angle of the second side surface of the sixth lens, thereby changing the relative position of the pupil image of the secondary reflection ghost image of the filter on the focal plane, making the pupil image of the ghost image far away from the focal plane, effectively reducing the energy value of the ghost image, and improving the imaging quality of the optical lens.

[0131] In an example embodiment, a focal length value F6 of the sixth lens and an overall focal length value F of the optical lens can satisfy: |F6 / F|≥2. In an example, 3.5≤|F6 / F|≤35. Reasonably controlling the mutual relationship between the focal length value of the sixth lens and the overall focal length value of the optical lens can make the sixth lens have a larger focal length value, so that the deflection angle of light rays converging or diverging at the sixth lens is small, which is beneficial to realize small CRA of the optical lens, correct aberration of the optical lens, reduce sensitivity of the optical lens, correct chromatic aberration of the optical lens, and improve lens imaging quality.

[0132] In an example embodiment, an optical total length TTL of the optical lens and an overall focal length value F of the optical lens can satisfy: TTL / F≤5. In an example, 3≤TTL / F≤4.3. Reasonably controlling the mutual relationship between the optical total length of the optical lens and the overall focal length value of the optical lens can make the optical lens have a smaller optical total length under the condition that the overall focal length value of the optical lens is certain, which is beneficial to realize miniaturization of the optical lens.

[0133] In an example embodiment, a curvature radius R5 of the first side surface of the third lens and an overall focal length value F of the optical lens can satisfy: 0.2≤R5 / F≤4. In an example, 0.2≤R5 / F≤3. Reasonably controlling the mutual relationship between the curvature radius of the first side surface of the third lens and the overall focal length value of the optical lens can make the first side surface of the third lens be a convex surface, and the curvature radius of the first side surface of the third lens be smaller, which is beneficial to shrink front light, reduce the height of light entering the third lens, and reduce the front lens aperture; the first side surface of the third lens can also compress light emitted by the second lens, which is beneficial to reduce aberration caused by light entering the second lens, compact the lens structure, and realize miniaturization of the optical lens.

[0134] In an example embodiment, an optical total length TTL of the optical lens and an air gap d2 of the first lens and the second lens on the optical axis can satisfy: TTL / d2≥8. In an example, 9≤TTL / d2≤15. Reasonably controlling the mutual relationship between the optical total length of the optical lens and the air gap of the first lens and the second lens on the optical axis can constrain the air gap between the first lens and the second lens, so that the proportion of the air gap between the first lens and the second lens in the total length of the optical lens is smaller, which is beneficial to reduce the optical total length of the optical lens, increase the angle of the edge field light beam reaching the first side surface of the second lens, and improve the relative luminance of the edge field.

[0135] In an example embodiment, the lens group length TL of the optical lens and the air gap d9 of the fifth lens and the sixth lens on the optical axis can satisfy: d9 / TL≥0.01. In an example, 0.02≤d9 / TL≤0.1. Reasonably controlling the mutual relationship between the lens group length of the optical lens and the air gap of the fifth lens and the sixth lens on the optical axis can make the proportion of the air gap between the fifth lens and the sixth lens to the total length of the lens group of the optical lens larger, the air gap between the fifth lens and the sixth lens larger, which is conducive to weakening the reflection between the lenses and achieving the effect of no ghost image; at the same time, it can also reduce the lens group length of the optical lens, which is conducive to increasing the back focus of the optical lens under the condition that the total optical length is unchanged. When the air gap between the fifth lens and the sixth lens is too large, the resolution of the optical lens decreases, and by restricting the air gap between the fifth lens and the sixth lens within a reasonable range, the imaging quality of the optical lens can be improved.

[0136] According to an example embodiment of the present application, the radius of curvature R9 of the second side surface of the fifth lens and the radius of curvature R8 of the first side surface of the fifth lens can satisfy: |R9 / R8|≥2. In an example, |R9 / R8|≥2.3. By controlling the radii of curvature of the first side surface and the second side surface of the fifth lens, the diffusion or convergence effect of the two side surfaces of the fifth lens can be reasonably distributed, which is conducive to the smooth transition of light, realizes the long back focus of the optical lens, and at the same time can reduce the sensitivity of the optical lens, improve the resolution quality of the optical lens, and ensure that the optical lens realizes a small aperture at the rear end.

[0137] The optical lens according to the above-mentioned embodiments of the present application can adopt multiple lenses, for example, the six lenses described above. By reasonably distributing the optical parameters of each lens, the optical lens realizes high light quantity, miniaturization, small aperture, long back focus, high resolution, small distortion, weak ghost image, small CRA, high imaging quality, and can be well matched with, for example, a vehicle-mounted chip without dark corner phenomenon. The optical lens can simultaneously meet the requirements of small size and low sensitivity. The optical lens has good temperature performance, and the imaging effect changes little at high and low temperatures, and the image quality is stable. Therefore, the optical lens according to the above-mentioned embodiments of the present application can better meet the requirements of, for example, vehicle-mounted applications.

[0138] Those skilled in the art should understand that the total optical length TTL of the optical lens used in the above is the axial distance from the first side surface of the first lens to the imaging surface or image source surface; the lens group length TL of the optical lens is the axial distance from the first side surface of the first lens to the second side surface of the sixth lens; the optical back focus BFL of the optical lens is the axial distance from the second side surface of the sixth lens to the imaging surface or image source surface; and the maximum field of view FOV of the optical lens is related to the image height H, which refers to the corresponding field of view using the image height H.

[0139] However, those skilled in the art will appreciate that the number of lenses comprising the optical lens may be varied to achieve the various results and advantages described herein without departing from the claimed technical solutions. For example, while the embodiments describe six lenses as an example, the optical lens is not limited to six lenses. If desired, the optical lens may also include other numbers of lenses.

[0140] Specific embodiments of the optical lens applicable to the above-mentioned embodiments will be further described below with reference to the accompanying drawings.

[0141] Example 1

[0142] The following reference Figure 1 The optical lens according to Example 1 of the present application is described.

[0143] like Figure 1 As shown, optical lens 101 includes, in order 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. Fourth lens L4 and fifth lens L5 are cemented together to form a cemented lens. Second lens L2 and sixth lens L6 are aspherical lenses. The first and second side surfaces of second lens L2 have an inflection point. A stop STO may be disposed between third lens L3 and fourth lens L4.

[0144] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0145] Table 1 shows the basic parameters of the optical lens of Example 1, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0146]

[0147]

[0148] Table 1

[0149] In Example 1, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical surfaces. The surface shape x of each aspherical lens can be defined by, but is not limited to, the following aspherical surface formula:

[0150]

[0151] Wherein, x is the distance vector height of the aspheric surface from the vertex of the aspheric surface at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the conic coefficient k and the higher-order coefficients A4, A6, A8, A9 that can be used for each aspheric surface S3, S4, S10, and S11 in Example 1. 10 、A 12 、A 14 and A 16 .

[0152] Face number k A4 A6 A8 A10 A12 A14 A16 S3 100.0000 -2.5816E-03 1.7644E-04 -7.3158E-05 1.5569E-05 -1.5057E-06 1.3166E-08 2.3911E-09 S4 85.0000 -1.5955E-03 -6.4619E-05 2.0652E-05 -5.6108E-06 1.1100E-06 -1.1552E-07 4.4631E-09 S10 19.8000 1.8090E-04 5.7726E-06 -1.5802E-04 6.1567E-05 -1.6320E-05 2.5434E-06 -8.3598E-08 S11 -120.0000 3.0433E-03 1.5854E-05 -8.5780E-05 2.3824E-05 -5.2355E-06 5.1026E-07 -2.2375E-08

[0153] Table 2

[0154] Example 2

[0155] The following reference Figure 2 Describe the optical lens according to Example 2 of the present application.

[0156] like Figure 2 As shown, optical lens 102 includes, in order 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. Fourth lens L4 and fifth lens L5 are cemented together to form a cemented lens. Second lens L2 and sixth lens L6 are aspherical lenses. The first and second side surfaces of second lens L2 have an inflection point. A stop STO may be disposed between third lens L3 and fourth lens L4.

[0157] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0158] Table 3 shows the basic parameters of the optical lens of Example 2, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0159]

[0160] Table 3

[0161] In Example 2, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical. Table 4 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of the aspherical surfaces S3, S4, S10, and S11 that can be used in Example 2. 10 、A 12 、A 14 and A 16 .

[0162] Face number k A4 A6 A8 A10 A12 A14 A16 S3 100.0000 -2.2800E-03 1.7200E-04 -7.3600E-05 1.5900E-05 -1.5000E-06 1.3000E-08 2.3900E-09 S4 85.0000 -1.6500E-03 -6.4000E-05 2.0800E-05 -5.6000E-06 1.1000E-06 -1.1600E-07 4.4600E-09 S10 19.8000 1.7100E-04 5.7000E-06 -1.6002E-04 6.1500E-05 -1.6300E-05 2.5400E-06 -8.3800E-08 S11 -120.0000 3.2400E-03 1.6000E-05 -8.7800E-05 2.3800E-05 -5.2400E-06 5.1000E-07 -2.2300E-08

[0163] Table 4

[0164] Example 3

[0165] The following reference Figure 3 Describe the optical lens according to Example 3 of the present application.

[0166] like Figure 3 As shown, the optical lens 103 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surfaces of the second lens L2 and the sixth lens L6 have an inflection point. A stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0167] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has negative optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0168] Table 5 shows the basic parameters of the optical lens of Example 3, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0169]

[0170] Table 5

[0171] In Example 3, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical. Table 6 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of the aspherical surfaces S3, S4, S10, and S11 that can be used in Example 3. 10 、A 12 、A 14 and A 16 .

[0172] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -99.0000 -5.5062E-03 -3.4479E-05 -7.6041E-05 1.7256E-05 -1.6944E-06 -1.5561E-08 8.2475E-09 S4 -99.0000 -4.1713E-03 -1.4642E-04 1.7656E-05 -6.1302E-06 1.4664E-06 -1.6489E-07 9.2976E-09 S10 -99.0000 -3.0351E-03 -5.8706E-04 3.2636E-07 1.5284E-05 -5.6592E-06 8.1531E-07 -4.6622E-08 S11 -99.0000 3.1207E-03 -1.4432E-03 5.7514E-04 -1.2271E-04 1.9186E-05 -1.6174E-06 5.3277E-08

[0173] Table 6

[0174] Example 4

[0175] The following reference Figure 4 Describe the optical lens according to Example 4 of the present application.

[0176] like Figure 4As shown, the optical lens 104 comprises, in order along the optical axis from the first side to the second side: 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. The fourth lens L4 and the fifth lens L5 are cemented and form a cemented lens. The second lens L2 and the sixth lens L6 are aspheric lenses. The first side of the second lens L2 and the sixth lens L6 has a point of inflection. A stop STO can be disposed between the third lens L3 and the fourth lens L4.

[0177] The first lens L1 has a negative focal power, the first side S1 thereof is concave, and the second side S2 thereof is concave. The second lens L2 has a positive focal power, the first side S3 thereof is convex, and the second side S4 thereof is convex. The third lens L3 has a positive focal power, the first side S5 thereof is convex, and the second side S6 thereof is convex. The fourth lens L4 has a negative focal power, the first side S7 thereof is convex, and the second side thereof is concave. The fifth lens L5 has a positive focal power, the first side S8 thereof is convex, and the second side S9 thereof is convex. The sixth lens L6 has a negative focal power, the first side S10 thereof is convex, and the second side S11 thereof is concave. The filter L7 has a first side S12 and a second side S13. When the IMA is an imaging plane, light from the object passes through each of the surfaces S1-S13 in order and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA passes through each of the surfaces S13-S1 in order and is finally projected on the object.

[0178] Table 7 shows a basic parameter table of the optical lens of Example 4, wherein the units of the radius of curvature, thickness / distance are millimeters (mm).

[0179]

[0180] Table 7

[0181] In Example 4, the first side and the second side of the second lens L2 and the sixth lens L6 are aspheric surfaces. Table 8 gives the conic coefficients k and the high-order coefficients A4, A6, A8, A10, and A12 that can be used for each aspheric surface S3, S4, S10, S11 in Example 4. 10 12 14 16

[0182] Face number k A4 A6 A8 A10 A12 A14 A16 S3 -99.0000 -5.0062E-03 -3.5979E-05 -7.2041E-05 1.7996E-05 -1.6994E-06 -1.0561E-08 6.6475E-09 S4 -99.0000 -4.0713E-03 -1.2642E-04 1.9256E-05 -6.3302E-06 1.8664E-06 -1.2489E-07 7.2976E-09 S10 -99.0000 -3.0351E-03 -5.0706E-04 3.1636E-07 1.7084E-05 -5.8592E-06 8.0531E-07 -4.6022E-08 S11 -99.0000 3.2207E-03 -1.6432E-03 4.8514E-04 -1.2571E-04 1.9186E-05 -1.4174E-06 5.5277E-08

[0183] Table 8

[0184] Example 5

[0185] An optical lens according to Example 5 of the present application is described below with reference to Figure 5

[0186] ​​​​​like Figure 5 As shown, optical lens 105 includes, in order 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. Fourth lens L4 and fifth lens L5 are cemented together to form a cemented lens. Second lens L2 and sixth lens L6 are aspherical lenses. The first and second side surfaces of sixth lens L6 have an inflection point. A stop STO may be disposed between third lens L3 and fourth lens L4.

[0187] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being concave. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0188] Table 9 shows the basic parameters of the optical lens of Example 5, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0189]

[0190] Table 9

[0191] In Example 5, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical. Table 10 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of the aspherical surfaces S3, S4, S10, and S11 that can be used in Example 5. 10 、A 12 、A 14 and A 16 .

[0192] Face number k A4 A6 A8 A10 A12 A14 A16 S3 54.6970 2.0551E-04 1.8133E-04 -6.4582E-05 1.6003E-05 -1.5760E-06 4.8255E-09 2.4967E-09 S4 71.0070 -1.0019E-04 -3.5860E-05 1.2332E-05 -5.5650E-06 1.0667E-06 -1.2362E-07 4.3023E-09 S10 -66.9200 1.0382E-03 -2.3527E-04 -7.8542E-05 4.8450E-05 -1.1406E-05 1.3069E-06 -6.4258E-08 S11 -150.0000 2.9935E-03 -2.0884E-05 -2.4271E-05 2.5941E-05 -4.2372E-06 4.1549E-07 -2.2177E-08

[0193] Table 10

[0194] Example 6

[0195] The following reference Figure 6 Describe the optical lens according to Example 6 of the present application.

[0196] like Figure 6 As shown, optical lens 106 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface of the sixth lens L6 has an inflection point. A stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0197] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being concave. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0198] Table 11 shows the basic parameters of the optical lens of Example 6, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0199]

[0200] Table 11

[0201] In Example 6, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical. Table 12 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of the aspherical surfaces S3, S4, S10, and S11 that can be used in Example 6. 10 、A 12 、A 14 and A 16 .

[0202] Face number k A4 A6 A8 A10 A12 A14 A16 S3 52.2990 3.8087E-04 2.3116E-04 -6.1434E-05 1.2820E-05 -1.5531E-06 1.4151E-08 4.7988E-09 S4 72.0640 -2.5557E-05 -4.0369E-05 1.1010E-05 -6.0751E-06 1.0594E-06 -1.2167E-07 5.7233E-09 S10 -150.0000 6.3586E-06 -5.0062E-04 -1.8773E-04 4.5131E-05 -1.9161E-05 1.3286E-06 -6.7007E-08 S11 -66.1050 2.0373E-03 -2.5959E-04 -8.8080E-05 2.4679E-05 -5.8198E-06 5.3760E-07 -2.4718E-08

[0203] Table 12

[0204] Example 7

[0205] The following reference Figure 7 Describe the optical lens according to Example 7 of the present application.

[0206] like Figure 7 As shown, optical lens 107 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface of the sixth lens L6 has an inflection point. A stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0207] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0208] Table 13 shows the basic parameters of the optical lens of Example 7, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0209]

[0210] Table 13

[0211] In Example 7, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical. Table 14 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of the aspherical surfaces S3, S4, S10, and S11 that can be used in Example 7. 10 、A 12 、A 14 and A 16 .

[0212] Face number k A4 A6 A8 A10 A12 A14 A16 S3 60.3770 -5.3896E-04 5.1449E-05 -1.0185E-05 5.6142E-06 -1.7312E-06 1.1156E-07 -1.2178E-09 S4 45.9510 -7.4828E-04 -1.6724E-04 7.3181E-05 -1.6049E-05 1.2194E-06 -2.0129E-08 -2.1869E-09 S10 -148.5900 -3.6530E-03 -6.9150E-04 -1.1823E-04 4.6341E-05 -1.1287E-05 1.3359E-06 -6.0480E-08 S11 150.0000 -1.5323E-03 -4.5086E-04 -8.3262E-05 2.3397E-05 -5.0312E-06 4.4066E-07 -2.0358E-08

[0213] Table 14

[0214] Example 8

[0215] The following reference Figure 8An optical lens according to Embodiment 8 of the present application is described.

[0216] As shown in FIG. 8, the optical lens 108 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented and form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side of the sixth lens L6 has a point of inflection. A stop STO can be disposed between the third lens L3 and the fourth lens L4. Figure 8

[0217] The first lens L1 has a negative focal power, the first side S1 thereof is concave, and the second side S2 thereof is concave. The second lens L2 has a negative focal power, the first side S3 thereof is concave, and the second side S4 thereof is convex. The third lens L3 has a positive focal power, the first side S5 thereof is convex, and the second side S6 thereof is concave. The fourth lens L4 has a negative focal power, the first side S7 thereof is convex, and the second side thereof is concave. The fifth lens L5 has a positive focal power, the first side S8 thereof is convex, and the second side S9 thereof is convex. The sixth lens L6 has a positive focal power, the first side S10 thereof is convex, and the second side S11 thereof is convex. The filter L7 has a first side S12 and a second side S13. When the IMA is an imaging plane, light from an object passes through the surfaces S1 to S13 in order and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA passes through the surfaces S13 to S1 in order and is finally projected on the object.

[0218] Table 15 shows the basic parameter table of the optical lens of Embodiment 8, wherein the units of the radius of curvature, the thickness / distance are all millimeters (mm).

[0219]

[0220] Table 15

[0221] In Embodiment 8, the first side and the second side of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 16 gives the conic coefficients k and the high-order coefficients A4, A6, A8, and A10 that can be used in the aspherical surfaces S3, S4, S10, and S11 of Embodiment 8. 10 12 14 16

[0222]

[0223]

[0224] Table 16

[0225] ​​​​​Example 9

[0226] The following reference Figure 9 Describe the optical lens according to Example 9 of the present application.

[0227] like Figure 9 As shown, optical lens 109 includes, in order 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. Fourth lens L4 and fifth lens L5 are cemented together to form a cemented lens. Second lens L2 and sixth lens L6 are aspherical lenses. The first and second side surfaces of sixth lens L6 have an inflection point. A stop STO may be disposed between third lens L3 and fourth lens L4.

[0228] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has negative optical power, with its first side surface S10 and second side surface S11 being concave. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0229] Table 17 shows the basic parameters of the optical lens of Example 9, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0230]

[0231] Table 17

[0232] In Example 9, the first and second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical. Table 18 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of the aspherical surfaces S3, S4, S10, and S11 that can be used in Example 9. 10 、A 12 、A 14 and A 16 .

[0233] Face number k A4 A6 A8 A10 A12 A14 A16 S3 28.5820 -1.3290E-04 1.7725E-04 -5.4930E-06 7.3390E-06 -1.2774E-06 9.2766E-08 -1.1731E-09 S4 -42.3730 -1.9226E-04 -7.1476E-05 8.2118E-05 -1.5736E-05 1.3031E-06 -3.0478E-08 -1.1972E-09 S10 150.0000 1.2542E-03 -3.2286E-04 -9.2106E-05 4.0182E-05 -1.1278E-05 1.3286E-06 -5.2008E-08 S11 70.8180 3.7159E-03 -2.4181E-04 -8.6854E-05 2.2374E-05 -4.9116E-06 4.1586E-07 -9.6989E-09

[0234] Table 18

[0235] Example 10

[0236] The following reference Figure 10 The optical lens according to Example 10 of the present application is described.

[0237] like Figure 10 As shown, optical lens 110 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The second side surface of the second lens L2 and the first side surface of the sixth lens L6 have an inflection point. A stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0238] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has negative optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has negative optical power, with its first side surface S7 and second side surface S7 being convex. The fifth lens L5 has positive optical power, with its first side surface S8 and second side surface S9 being convex. The sixth lens L6 has negative optical power, with its first side surface S10 and second side surface S11 being concave. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0239] Table 19 shows the basic parameters of the optical lens of Example 10, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0240]

[0241] Table 19

[0242] In Example 10, the first side surfaces and the second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical surfaces.

[0243] Table 20 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A9, A10, A11 of each aspheric surface S3, S4, S10, S11 that can be used in Example 10. 10 、A 12 、A 14 and A 16 .

[0244] Face number k A4 A6 A8 A10 A12 A14 A16 S3 28.5820 -1.8290E-04 1.2225E-04 -5.7330E-06 7.5390E-06 -1.2474E-06 9.1366E-08 -1.1731E-09 S4 -42.3730 -1.9826E-04 -7.9476E-05 8.2118E-05 -1.5436E-05 1.3481E-06 -3.0428E-08 -1.1979E-09 S10 150.0000 1.6542E-03 -3.4486E-04 -9.0706E-05 4.7382E-05 -1.1878E-05 1.3286E-06 -5.2008E-08 S11 70.8180 3.1359E-03 -2.4781E-04 -8.1554E-05 2.7374E-05 -5.3456E-06 4.2566E-07 -9.4989E-09

[0245] Table 20

[0246] Example 11

[0247] The following reference Figure 11 Describe the optical lens according to Example 11 of the present application.

[0248] like Figure 11 As shown, the optical lens 111 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The second side surface of the sixth lens L6 has an inflection point. A stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0249] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has positive optical power, with its first side surface S7 and second side surface S9 being concave. The fifth lens L5 has negative optical power, with its first side surface S8 and second side surface S9 being concave. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0250] Table 21 shows the basic parameters of the optical lens of Example 11, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0251]

[0252]

[0253] Table 21

[0254] In Example 11, the first side surfaces and the second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical surfaces.

[0255] Table 22 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A10 , A 12 , A 14 and A 16 .

[0256] Face number k A4 A6 A8 A10 A12 A14 A16 S3 54.5050 4.1532E-04 2.0196E-04 -4.0579E-05 1.6214E-05 -1.5784E-06 6.5624E-09 4.2295E-09 S4 71.3520 8.1685E-04 1.9094E-05 2.0156E-05 -5.3437E-06 3.5842E-06 -1.0086E-07 3.4098E-09 S10 -58.8330 1.2186E-03 -2.2200E-04 -1.0200E-04 4.2843E-05 -1.1274E-05 1.5217E-06 -6.2158E-08 S11 -150.0000 2.1738E-03 -1.0602E-04 -3.0759E-05 2.2570E-05 -5.2721E-06 5.4933E-07 -1.8201E-08

[0257] Table 22

[0258] Example 12

[0259] An optical lens according to Embodiment 12 of the present application is described below with reference to Figure 12

[0260] As shown in FIG. 12, the optical lens 112 includes, in order along the optical axis from the first side to the second side, 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. The fourth lens L4 and the fifth lens L5 are cemented and form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. A stop STO can be disposed between the third lens L3 and the fourth lens L4. Figure 12

[0261] The first lens L1 has a negative focal power, the first side S1 is concave, and the second side S2 is concave. The second lens L2 has a positive focal power, the first side S3 is convex, and the second side S4 is concave. The third lens L3 has a positive focal power, the first side S5 is convex, and the second side S6 is convex. The fourth lens L4 has a positive focal power, the first side S7 is concave, and the second side is convex. The fifth lens L5 has a negative focal power, the first side S8 is concave, and the second side S9 is convex. The sixth lens L6 has a positive focal power, the first side S10 is convex, and the second side S11 is convex. The filter L7 has a first side S12 and a second side S13. When the IMA is an imaging plane, light from the object passes through each of the surfaces S1-S13 in order and is ultimately imaged on the IMA. When the IMA is an image source plane, light from the IMA passes through each of the surfaces S13-S1 in order and is ultimately projected on the object.

[0262] Table 23 shows a table of basic parameters of the optical lens of Embodiment 12, wherein the units of the radius of curvature, the thickness / distance are millimeters (mm).

[0263]

[0264]

[0265] Table 23

[0266] In Embodiment 12, the first side and the second side of the second lens L2 and the sixth lens L6 are aspherical. ​​

[0267] Table 24 shows the conic coefficient k and the high-order coefficients A4, A6, A8, A 10 、A 12 、A 14 and A 16 .

[0268] Face number k A4 A6 A8 A10 A12 A14 A16 S3 54.5050 4.1532E-04 3.0396E-04 -7.5059E-05 1.6514E-05 -1.5784E-06 6.3624E-09 4.9995E-09 S4 71.3520 6.1685E-04 1.2274E-05 2.4356E-05 -5.9437E-06 1.4892E-06 -1.2386E-07 3.8598E-09 S10 -58.8330 1.2186E-03 -3.0200E-04 -1.0800E-04 4.6843E-05 -1.1474E-05 1.6217E-06 -6.5158E-08 S11 -150.0000 2.1738E-03 -1.0602E-04 -8.4759E-05 2.4570E-05 -5.6721E-06 5.9933E-07 -1.9601E-08

[0269] Table 24

[0270] Example 13

[0271] The following reference Figure 13 Describe the optical lens according to Example 13 of the present application.

[0272] like Figure 13 As shown, the optical lens 113 includes, in order 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. The fourth lens L4 and the fifth lens L5 are cemented together to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. A stop STO may be disposed between the third lens L3 and the fourth lens L4.

[0273] The first lens L1 has negative optical power, with its first side surface S1 and second side surface S2 being concave. The second lens L2 has positive optical power, with its first side surface S3 and second side surface S4 being convex. The third lens L3 has positive optical power, with its first side surface S5 and second side surface S6 being convex. The fourth lens L4 has positive optical power, with its first side surface S7 and second side surface S9 being concave. The fifth lens L5 has negative optical power, with its first side surface S8 and second side surface S9 being concave. The sixth lens L6 has positive optical power, with its first side surface S10 and second side surface S11 being convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA serves as the imaging surface, light from the object sequentially passes through surfaces S1 to S13 and is ultimately imaged on the IMA. When the IMA serves as the image source surface, light from the IMA sequentially passes through surfaces S13 to S1 and is ultimately projected onto the object.

[0274] Table 25 shows the basic parameter table of the optical lens of Example 13, wherein the units of curvature radius and thickness / distance are all millimeters (mm).

[0275]

[0276]

[0277] Table 25

[0278] In embodiment 13, the first and second side surfaces of the second lens L2 and the sixth lens L6 are aspheric surfaces.

[0279] Table 26 gives the conic constant k and the higher order coefficients A4, A6, A8, A10 and A12 of the aspheric surfaces S3, S4, S10, S11 used in embodiment 13. 10 12 14 16

[0280] Face number k A4 A6 A8 A10 A12 A14 A16 S3 36.3880 4.6978E-04 2.4648E-04 -7.0083E-05 1.2045E-05 -1.8372E-06 1.9390E-08 3.3297E-09 S4 77.2710 1.1193E-03 -1.3097E-06 2.2088E-05 -5.3419E-06 1.0758E-06 -1.1975E-07 4.8323E-09 S10 -49.8430 5.1845E-04 -1.1255E-04 -1.1928E-04 4.6499E-05 -1.5936E-05 1.3875E-06 -7.6825E-08 S11 -41.5260 2.9407E-03 -1.1556E-05 -6.4728E-05 2.5268E-05 -5.2456E-06 5.4925E-07 -2.4378E-08

[0281] Table 26

[0282] Example 14

[0283] An optical lens according to embodiment 14 of the present application is described below with reference to Figure 14

[0284] As shown in FIG. 14, the optical lens 114 comprises, in order 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. The fourth lens L4 and the fifth lens L5 are cemented and form a cemented lens. The second lens L2 and the sixth lens L6 are aspheric lenses. A stop STO can be disposed between the third lens L3 and the fourth lens L4. Figure 14

[0285] The first lens L1 has a negative focal power, its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has a positive focal power, its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has a positive focal power, its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has a positive focal power, its first side surface S7 is concave, and its second side surface is convex. The fifth lens L5 has a negative focal power, its first side surface S8 is concave, and its second side surface S9 is convex. The sixth lens L6 has a positive focal power, its first side surface S10 is concave, and its second side surface S11 is convex. The filter L7 has a first side surface S12 and a second side surface S13. When the IMA is an imaging plane, light from the object passes through the surfaces S1 to S13 in order and is finally imaged on the IMA. When the IMA is an image source plane, light from the IMA passes through the surfaces S13 to S1 in order and is finally projected on the object.

[0286] Table 27 shows the basic parameter table of the optical lens of embodiment 14, wherein the units of the curvature radius, thickness / distance are millimeters (mm).

[0287] ​​​​​​

[0288]

[0289] Table 27

[0290] In embodiment 14, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are aspherical surfaces.

[0291] Table 28 gives the conic coefficients k and the higher order coefficients A4, A6, A8, A10 and A12 of the aspherical surfaces S3, S4, S10, S11 which can be used in embodiment 14. 10 12 14 16

[0292] Face number k A4 A6 A8 A10 A12 A14 A16 S3 36.3880 4.6978E-04 2.4648E-04 -7.2083E-05 1.6045E-05 -1.4372E-06 1.9390E-08 3.3297E-09 S4 77.2710 1.1193E-03 -1.3097E-06 2.2688E-05 -5.7419E-06 1.0758E-06 -1.1975E-07 4.8323E-09 S10 -49.8430 5.1845E-04 -1.5555E-04 -1.5928E-04 4.2499E-05 -1.0937E-05 1.3875E-06 -7.6825E-08 S11 -41.5260 2.9407E-03 -1.1156E-05 -6.4728E-05 2.5268E-05 -5.2456E-06 5.4925E-07 -2.4378E-08

[0293] Table 28

[0294] Table 29 gives the basic parameters of the optical lenses in embodiments 1 to 14, wherein F is the overall focal length value of the optical lens, Fno is the aperture number of the optical lens, ENPD is the entrance pupil diameter of the optical lens, TTL is the total optical length of the optical lens, TL is the lens group length of the optical lens, FOV is the maximum field of view angle of the optical lens, θ is the radian value of the maximum field of view angle of the optical lens, H is the image height corresponding to the maximum field of view angle of the optical lens, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view angle of the optical lens, BFL is the optical back focal length of the optical lens, F1 is the focal length value of the first lens, F2 is the focal length value of the second lens, F3 is the focal length value of the third lens, F4 is the focal length value of the fourth lens, F5 is the focal length value of the fifth lens, F6 is the focal length value of the sixth lens, D11 is the maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens, D12 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field of view angle of the optical lens, SAG11 is the sagittal height of the first side surface of the sixth lens, SAG12 is the sagittal height of the second side surface of the sixth lens.

[0295]

[0296]

[0297] From Table 29, the conditional expressions of each of embodiments 1 to 14 satisfy the relationships shown in Table 30.

[0298]

[0299]

[0300] Table 30

[0301] ​​​​The application also provides an imaging device, which comprises the optical lens in the above example embodiments and an imaging element for converting the optical image formed by the optical lens into an electric signal, the imaging element being arranged on an imaging plane or an image source plane, which can be, for example, a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS).

[0302] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. It should be understood by those skilled in the art that the scope of the application involved in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. An optical lens, characterized in that: The optical axis includes, in order from the first side to the second side: a first lens having negative optical power, wherein the first side surface is concave and the second side surface is concave; a second lens having optical power; a third lens element having positive optical power and a convex first side surface; a fourth lens having optical power; a fifth lens having optical power; and a sixth lens having optical power, Wherein, the number of lenses having optical power in the optical lens is six; The signs of the optical powers of the fourth lens and the fifth lens are opposite in positive and negative properties; The focal length F2 of the second lens and the focal length F of the entire optical lens set satisfy: 5≤|F2 / F|≤100; The optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.2≤BFL / TTL≤0.7; The center thickness d7 of the fourth lens on the optical axis, the center thickness d8 of the fifth lens on the optical axis, and the total optical length TTL of the optical lens satisfy the following: 0.1≤(d7+d8) / TTL≤0.35; The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy: |(HF×θ) / (F×θ)|≤0.

1.

2. The optical lens according to claim 1, wherein: The second lens has positive optical power, the first side surface of the second lens is a convex surface, and the second side surface of the second lens is a convex surface or a concave surface.

3. The optical lens according to claim 1, wherein: The second lens has negative optical power, a first side surface of the second lens is a concave surface, and a second side surface of the second lens is a convex surface.

4. The optical lens according to claim 1, wherein: The second side surface of the third lens is a convex surface or a concave surface.

5. The optical lens according to claim 1, wherein: 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; the fifth lens has negative optical power, the first side surface of the fifth lens is concave, and the second side surface of the fifth lens is convex.

6. The optical lens according to claim 1, wherein: 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; the fifth lens has positive optical power, the first side surface of the fifth lens is convex, and the second side surface of the fifth lens is convex or concave.

7. The optical lens according to claim 1, wherein: The fourth lens and the fifth lens are cemented to form a cemented lens.

8. The optical lens according to claim 1, wherein: The sixth lens has positive optical power, the first side surface of the sixth lens is convex or concave, and the second side surface of the sixth lens is convex.

9. The optical lens according to claim 1, wherein: The sixth lens has negative optical power, the first side surface of the sixth lens is convex, and the second side surface of the sixth lens is concave.

10. The optical lens according to any one of claims 1 to 9, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance D of the first side surface of the first lens corresponding to the maximum field angle of the optical lens satisfy: (F×θ) / D≥0.

35.

11. The optical lens according to any one of claims 1 to 9, characterized in that: The entire focal length value F of the optical lens and the image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 0.4≤F / H≤1.

3.

12. The optical lens according to any one of claims 1 to 9, characterized in that: The entire focal length value F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the image height H corresponding to the maximum field angle of the optical lens satisfy the following conditions: 0.0058≤|(HF×θ) / (F×θ)|≤0.

1.

13. The optical lens according to any one of claims 1 to 9, characterized in that: The maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, the image height H corresponding to the maximum field of view of the optical lens, and the maximum field of view FOV of the optical lens satisfy the following conditions: (D×180°) / (H×FOV)≤5.

14. The optical lens according to any one of claims 1 to 9, characterized in that: The entire focal length value F of the optical lens and the optical back focus BFL of the optical lens satisfy the following conditions: F / BFL≤1.

2.

15. The optical lens according to any one of claims 1 to 9, characterized in that: The focal length F3 of the third lens and the focal length F4 of the fourth lens satisfy: 0.25≤|F3 / F4|≤3.

5.

16. The optical lens according to any one of claims 1 to 9, characterized in that: The vector height SAG11 of the first side surface of the sixth lens and the maximum clear aperture D11 of the first side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy the following: |SAG11 / (D11×2)|≤0.

1.

17. The optical lens according to any one of claims 1 to 9, characterized in that: The focal length value F3 of the third lens and the focal length value F of the entire optical lens group satisfy: F3 / F≤5.

5.

18. The optical lens according to any one of claims 1 to 9, characterized in that: The maximum clear aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, the maximum clear aperture D of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (D11×D) / H≤7.5mm.

19. The optical lens according to any one of claims 1 to 9, characterized in that: The curvature radius R5 of the first side surface of the third lens, the curvature radius R6 of the second side surface of the third lens, and the focal length F of the entire optical lens set satisfy: |F / R5|+|F / R6|≤2.

20. The optical lens according to any one of claims 1 to 9, characterized in that: The vector height SAG12 of the second side surface of the sixth lens and the maximum clear aperture D12 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens satisfy the following: |arctan(SAG12 / D12)|≤0.2°.

21. The optical lens according to any one of claims 1 to 9, characterized in that: The focal length F6 of the sixth lens and the focal length F of the entire optical lens set satisfy: |F6 / F|≥2.

22. The optical lens according to any one of claims 1 to 9, characterized in that: The total optical length TTL of the optical lens and the entire focal length value F of the optical lens satisfy: TTL / F≤5.

23. The optical lens according to any one of claims 1 to 9, characterized in that: The curvature radius R5 of the first side surface of the third lens and the focal length value F of the entire optical lens group satisfy: 0.2≤R5 / F≤4.

24. The optical lens according to any one of claims 1 to 9, characterized in that: The total optical length TTL of the optical lens and the air interval d2 between the first lens and the second lens on the optical axis satisfy the following conditions: TTL / d2≥8.

25. The optical lens according to any one of claims 1 to 9, characterized in that: A lens group length TL of the optical lens and an air interval d9 between the fifth lens and the sixth lens on the optical axis satisfy the following condition: d9 / TL≥0.

01.

26. The optical lens according to any one of claims 1 to 9, characterized in that: A curvature radius R9 of the second side surface of the fifth lens and a curvature radius R8 of the first side surface of the fifth lens satisfy: |R9 / R8|≥2.

27. The optical lens according to any one of claims 1 to 9, characterized in that: The optical lens further includes a stop, which is disposed between the third lens and the fourth lens.

28. The optical lens according to any one of claims 1 to 9, characterized in that: At least two lenses among the first to sixth lenses are configured as aspherical lenses.

29. The optical lens according to any one of claims 1 to 9, characterized in that: The optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: 0.2≤BFL / TTL≤0.3818.

30. The optical lens according to any one of claims 1 to 9, characterized in that: The optical lens satisfies at least one of the following conditions: BFL / TTL≥0.25; 0.65≤(F×θ) / D≤2; 0.5≤F / H≤1.0; (D×180°) / (H×FOV)≤3.5; 0.60≤F / BFL≤0. 95; 0.5≤|F3 / F4|≤2; 0.1≤(d7+d8) / TTL≤0.25; 8≤|F2 / F|≤100; |SAG11 / (D11×2)|≤0.08;0.1 5≤F3 / F≤3.5; 3mm≤(D11×D) / H≤6.5mm; |F / R5|+|F / R6|≤1.5; |arctan(SAG12 / D12)|≤0.1°; 3 .5≤|F6 / F|≤35; 3≤TTL / F≤4.3; 0.2≤R5 / F≤3; 9≤TTL / d2≤15; 0.02≤d9 / TL≤0.1; |R9 / R8|≥2.3, Wherein, BFL is the optical back focus of the optical lens, TTL is the total optical length of the optical lens, F is the focal length of the entire set of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the maximum clear aperture of the first side of the first lens corresponding to 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, FOV is the maximum field of view of the optical lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, d7 is the center thickness of the fourth lens on the optical axis, d8 is the center thickness of the fifth lens on the optical axis, F2 is the focal length of the second lens, SAG11 is the sag of the first side of the sixth lens, D11 is the image height of the optical The maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, R5 is the curvature radius of the first side surface of the third lens, R6 is the curvature radius of the second side surface of the third lens, SAG12 is the sag height of the second side surface of the sixth lens, D12 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens, F6 is the focal length of the sixth lens, d2 is the air gap between the first lens and the second lens on the optical axis, TL is the lens group length of the optical lens, d9 is the air gap between the fifth lens and the sixth lens on the optical axis, R8 is the curvature radius of the first side surface of the fifth lens, and R9 is the curvature radius of the second side surface of the fifth lens.

31. The optical lens according to any one of claims 1 to 9, characterized in that: The optical lens satisfies at least one of the following conditions: 0.3101≤BFL / TTL≤0.3818; 0.9001≤(F×θ) / D≤1.0398; 0.6994≤F / H≤0.799 9;0.0058≤|(HF×θ) / (F×θ)|≤0.0793; 2.1999≤(D×180°) / (H×FOV)≤2.703 2;0.6888≤F / BFL≤0.8996;0.8658≤|F3 / F4|≤1.7358;0.1220≤(d7+d8) / T TL≤0.1798;11.3422≤|F2 / F|≤98.5178;0.0011≤|SAG11 / (D11×2)|≤0.04 18; 0.9999≤F3 / F≤2.7773; 4.4957mm≤(D11×D) / H≤5.7539mm; 0.8697≤|F / R5|+|F / R6|≤1.3768; 0.0014°≤|arctan(SAG12 / D12)|≤0.0984°; 4.1425 ≤|F6 / F|≤25.6125; 3.5451≤TTL / F≤3.8031; 1.1595≤R5 / F≤1.6927; 10.14 92≤TTL / d2≤12.3641; 0.0234≤d9 / TL≤0.0717; 2.5794≤|R9 / R8|≤49.2010, Wherein, BFL is the optical back focus of the optical lens, TTL is the total optical length of the optical lens, F is the focal length of the entire set of the optical lens, θ is the radian value of the maximum field of view of the optical lens, D is the maximum clear aperture of the first side of the first lens corresponding to 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, FOV is the maximum field of view of the optical lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, d7 is the center thickness of the fourth lens on the optical axis, d8 is the center thickness of the fifth lens on the optical axis, F2 is the focal length of the second lens, SAG11 is the sag of the first side of the sixth lens, D11 is the image height of the optical The maximum clear aperture of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, R5 is the curvature radius of the first side surface of the third lens, R6 is the curvature radius of the second side surface of the third lens, SAG12 is the sag height of the second side surface of the sixth lens, D12 is the maximum clear aperture of the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens, F6 is the focal length of the sixth lens, d2 is the air gap between the first lens and the second lens on the optical axis, TL is the lens group length of the optical lens, d9 is the air gap between the fifth lens and the sixth lens on the optical axis, R8 is the curvature radius of the first side surface of the fifth lens, and R9 is the curvature radius of the second side surface of the fifth lens.

32. The optical lens according to any one of claims 1 to 9, wherein: The optical lens satisfies at least one of the following conditions: 0.275≤BFL / TTL≤0.7; 10≤|F2 / F|≤100, Among them, BFL is the optical back focus of the optical lens, TTL is the total optical length of the optical lens, F is the focal length value of the entire group of the optical lens, and F2 is the focal length value of the second lens.

33. An imaging device, characterized in that The optical lens comprises the optical lens according to any one of claims 1 to 32 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images