Optical lens and imaging device

Abstract

The invention discloses an optical lens and imaging equipment, the optical lens sequentially comprises a first lens, a second lens with focal power, a third lens, a fourth lens with focal power, a fifth lens with focal power and a sixth lens with focal power from a first side to a second side along an optical axis, the first lens has negative focal power, the second lens has focal power, the third lens has focal power, the fourth lens has focal power, the fifth lens has focal power, and the sixth lens has focal power. The first side surface and the second side surface are concave surfaces; the third lens has positive focal power, and the first side surface of the third lens is a convex surface.

Description

Technical Field

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

[0002] With the continuous development of science and technology, automotive lenses have been widely used. However, automotive lenses still have many shortcomings. For example, when automotive lenses are used in high and low temperature environments, the resulting image is not clear, and after returning from high and low temperature environments to normal temperature environments, the resolution of the automotive lenses is difficult to meet the requirements; for example, automotive lenses are prone to produce strong ghost images, and strong ghost images will cause the driving assistance system to misjudge the current road conditions; for example, automotive lenses have aberration problems such as chromatic aberration, astigmatism, and distortion, which will affect the imaging quality of automotive lenses; for example, the light transmission ability of automotive lenses is not strong, and it is difficult to adapt to weak light environments such as night or rainy days; for example, when using automotive lenses at close object distances, the resolution ability of automotive lenses is poor and the sensitivity is high, resulting in poor imaging quality of automotive lenses, low assembly yield, and more difficult production. Summary of the invention

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

[0004] One aspect of the present application provides an optical lens, comprising 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, which are arranged in sequence from a first side to a second side along an optical axis; wherein the first lens has negative optical power, and its first side surface is concave, and its second side surface is concave; and the third lens has positive optical power, and its first side surface is convex.

[0005] According to an exemplary embodiment of the present application, 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.

[0006] According to an exemplary embodiment of the present application, the second lens has 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.

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

[0008] 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.

[0009] According to an exemplary embodiment of the present application, the fourth lens has positive optical 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.

[0010] 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.

[0011] 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.

[0012] According to an exemplary embodiment of the present application, the fourth lens is cemented with the fifth lens to form a cemented lens.

[0013] According to an exemplary embodiment of the present application, the sixth lens has positive optical 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.

[0014] 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.

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

[0016] According to an exemplary embodiment of the present application, the focal length value F of the entire group of the optical lens, 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.

[0017] 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.

[0018] 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 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)|≤0.2.

[0019] According to an exemplary embodiment of the present application, the maximum light clearance aperture D of the first side surface 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 satisfy: (D×180°) / (H×FOV)≤5.

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

[0021] According to an exemplary 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 exemplary embodiment of the present application, a center thickness d7 of the fourth lens on the optical axis, a center thickness d8 of the fifth lens on the optical axis, and a total optical length TTL of the optical lens satisfy: (d7+d8) / TTL≤0.35.

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

[0024] According to an exemplary embodiment of the present application, 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: |SAG11 / (D11×2)|≤0.1.

[0025] According to an exemplary embodiment of the present application, 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.

[0026] According to an exemplary 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 exemplary embodiment of the present application, 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 focal length value F of the entire optical lens group satisfy: |F / R5|+|F / R6|≤2.

[0028] According to an exemplary embodiment of the present application, 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: |arctan(SAG12 / D12)|≤0.2°.

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

[0030] According to an exemplary embodiment of the present application, the total optical length TTL of the optical lens and the entire group focal length value F of the optical lens satisfy: TTL / F≤5.

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

[0032] According to an exemplary embodiment of the present application, 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: TTL / d2≥8.

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

[0034] According to an exemplary 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 exemplary embodiment of the present application, the optical lens further includes a stop, and the stop is disposed between the third lens and the fourth lens.

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

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

[0038] According to an exemplary 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 exemplary embodiment of the present application, 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.

[0040] According to an exemplary embodiment of the present application, the second lens has 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 optical 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 is cemented with the fifth lens to form a cemented lens.

[0047] According to an exemplary embodiment of the present application, the sixth lens has positive optical 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 group of the optical lens, 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 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)|≤0.2.

[0052] According to an exemplary embodiment of the present application, the maximum light clearance aperture D of the first side surface 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 satisfy: (D×180°) / (H×FOV)≤5.

[0053] According to an exemplary embodiment of the present application, the entire group focal length value F of the optical lens and the optical back focus BFL of the optical lens satisfy: F / BFL≤1.2.

[0054] According to an exemplary 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.

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

[0056] According to an exemplary embodiment of the present application, the focal length value F2 of the second lens and the focal length value F of the entire optical lens group satisfy: |F2 / F|≥5.

[0057] According to an exemplary embodiment of the present application, 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: |SAG11 / (D11×2)|≤0.1.

[0058] According to an exemplary embodiment of the present application, 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.

[0059] According to an exemplary 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.

[0060] According to an exemplary embodiment of the present application, 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 focal length value F of the entire optical lens group satisfy: |F / R5|+|F / R6|≤2.

[0061] According to an exemplary embodiment of the present application, 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: |arctan(SAG12 / D12)|≤0.2°.

[0062] According to an exemplary embodiment of the present application, the focal length value F6 of the sixth lens and the focal length value F of the entire optical lens group satisfy: |F6 / F|≥2.

[0063] According to an exemplary embodiment of the present application, the total optical length TTL of the optical lens and the entire group focal length value F of the optical lens satisfy: TTL / F≤5.

[0064] According to an exemplary embodiment of the present application, a radius of curvature R5 of the first side surface of the third lens and a focal length value F of the entire optical lens group satisfy: 0.2≤R5 / F≤4.

[0065] According to an exemplary embodiment of the present application, 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: TTL / d2≥8.

[0066] According to an exemplary embodiment of the present application, the lens group length TL of the optical lens and the air interval d9 between the fifth lens and the sixth lens on the optical axis satisfy: d9 / TL≥0.01.

[0067] According to an exemplary 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.

[0068] According to an exemplary embodiment of the present application, the optical lens further includes a stop, and the stop is disposed between the third lens and the fourth lens.

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

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

[0071] The present application adopts, for example, six lenses with optical focal length, and by optimizing the shape and optical focal length of each lens, it can achieve at least one of the beneficial effects of the optical lens, such as high light throughput, miniaturization, small aperture, long back focus, high resolution, small distortion, weak ghost images, low sensitivity, good temperature performance, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings, in which:

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

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

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

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

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

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

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

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

[0081] Fig. 9 A schematic structural diagram of an optical lens according to Example 9 of the present application is shown;

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

[0083] Fig.11 A schematic structural diagram of an optical lens according to Example 11 of the present application is shown;

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

[0085] Fig.13 shows a schematic structural diagram of an optical lens according to Embodiment 13 of the present application; and

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

[0087] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and do not limit the scope of the present application in any way. Throughout the specification, the same figure numerals refer to the same elements.

[0088] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

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

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

[0091] It should also be understood that the terms "include", "comprising", and / or "having", when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. In addition, when describing embodiments of the present application, the term "may" is used to indicate "one or more embodiments of the present application". Furthermore, the term "exemplary" is intended to refer to an example or illustration.

[0092] Unless otherwise defined, all terms (including technical terms and scientific terms) used in this article have the same meaning as those commonly understood by ordinary technicians in the field to which this application belongs. It should also be understood that terms (such as terms defined in commonly used dictionaries) should be interpreted as having the same meaning as their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined in this article.

[0093] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the 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 with 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 as, for example, an imaging lens, in which case the first side of the optical lens may be an object side and the second side may be an image side. Light from the object side may be imaged on the image side. The second side of the optical lens is provided with an imaging surface of the optical lens.

[0097] In an exemplary embodiment, the optical lens can be used as, for example, a projection lens or a laser radar transmitting end lens. In this case, the second side of the optical lens can be an image source side, and the first side can be an 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 an image source surface of the optical lens.

[0098] In an exemplary embodiment, the first lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a concave surface. By designing the first lens in the above form, the light trend can be smoothly transitioned, and the light is diverged after passing through the first side surface of the first lens, so that the rear light converges slowly, and the light in the edge field of view shows an upward trend, which is conducive to the image point on the second side being away from the optical axis and achieving matching with the large photosensitive element to obtain a larger picture.

[0099] In an exemplary embodiment, the second lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. By designing the second lens as a positive meniscus lens with a convex first side surface, it is beneficial to converge light and make the light transition to the rear smoothly, reduce the height of the light incident to the rear, and thus reduce the aperture of the rear lens. At the same time, the second side surface of the second lens is designed to be a concave surface, which can diverge the light passing through the second lens, and the light emitted from the second side surface of the second lens has an upward trend, which is beneficial to improve the resolution of the optical lens and achieve high resolution of the optical lens.

[0100] In an exemplary embodiment, the second lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. By designing the second lens as a biconvex positive lens, it is beneficial to converge light, and when used with the third lens, it can ensure that light enters smoothly to the rear, thereby improving the resolution of the optical lens.

[0101] In an exemplary embodiment, the second lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. By designing the second lens in the above form, the light trend can be smoothly transitioned, and the light continues to diverge after passing through the first side surface of the second lens, so that the rear light converges more slowly, and the light in the edge field of view shows an upward trend. It is beneficial to match it with the first lens to achieve matching with a large photosensitive element.

[0102] In an exemplary embodiment, the third lens may have positive focal length, and its first side surface may be, for example, a convex surface, which is conducive to compressing light, and the second side surface may be, for example, a convex surface. By designing the third lens as a positive lens, it is conducive to converging light and making the light transition smoothly. At the same time, the first side surface and the second side surface of the third lens are both designed as convex surfaces, which can compress the angle of the incident light, so that the light emitted from the second lens can smoothly enter the rear, which is conducive to reducing the aperture of the rear lens, and can further converge the light entering the rear optical system, reduce the optical path of the rear light, and achieve a shorter TTL, thereby achieving miniaturization. The second lens with positive focal length and the third lens with positive focal length can be matched to further correct the aberrations generated by the front lens group, reduce aberrations, and further converge the light.

[0103] In an exemplary embodiment, the third lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. By designing the third lens in the above form, it is beneficial to converge light, compress the angle of incident light, and make the light emitted from the second lens smoothly enter the rear, further making the light trend smoothly transition, which is beneficial to achieve high resolution of the optical lens.

[0104] In an exemplary embodiment, the fourth lens may have a negative optical focal length, and its first side surface may be, for example, a convex surface, and the second side surface may be, for example, a concave surface. By designing the fourth lens as a negative meniscus lens, it is beneficial to collect light emitted from the third lens. Since the incident angle of the light on the first side surface of the fourth lens is small, by designing the first side surface of the fourth lens as a convex surface, the light can be converged so that the light can reach the rear smoothly, thereby achieving a large field of view of the optical lens. At the same time, the second side surface of the fourth lens is designed as a concave surface, which can avoid excessive convergence of light emitted from the first side surface of the fourth lens, and is beneficial to control the aperture of the rear lens. The fourth lens can be matched with a fifth lens whose first side surface is a convex surface, which is beneficial to the convergence of light and a smooth trend, thereby achieving small distortion of the optical lens.

[0105] In an exemplary embodiment, the fourth lens may have positive power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. The fourth lens first diverges and then converges the light emitted from the third lens, and the height of the large-angle edge light on the second side surface of the fourth lens is lower than the height of the first side surface of the fourth lens, which is conducive to reducing the aperture of the rear lens.

[0106] In an exemplary embodiment, the fifth lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. By designing the fifth lens as a positive meniscus lens with a convex first side surface, it is beneficial to converge light and make the light transition smoothly to the rear, reduce the height of the light incident to the rear, and thus reduce the aperture of the rear lens. At the same time, the second side surface of the fifth lens is designed to be a concave surface, which can appropriately diverge the light passing through the second side surface of the fifth lens, so that the light tends to rise, thereby achieving matching with a large photosensitive element to obtain a larger picture.

[0107] In an exemplary embodiment, the fifth lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. By designing the fifth lens as a positive lens, it is beneficial to converge light and make the light transition smoothly. At the same time, the first side surface and the second side surface of the fifth lens are both designed as convex surfaces, which can compress the angle of the incident light, so that the light emitted from the fourth lens can smoothly enter the rear, which is beneficial to reduce the diameter of the rear lens.

[0108] In an exemplary embodiment, the fifth lens may have a negative optical power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. When the fourth lens is a concave-convex positive lens, the fifth lens collects the light emitted from the fourth lens and makes the light transition smoothly. The light emitted from the fourth lens continues to diverge after passing through the first side surface of the fifth lens, so that the rear light converges more slowly, and the light in the edge field of view shows an upward trend. It is beneficial to match it with the fourth lens to achieve matching with a large photosensitive element.

[0109] In an exemplary embodiment, the fourth lens is glued to the fifth lens to form a glued lens. By using a glued lens, the chromatic aberration of the optical lens can be corrected, the total length of the optical lens can be reduced, and the light can be smoothly transitioned to the rear system, thereby optimizing the chief ray angle (CRA), relative illumination, distortion and other performances of the optical lens. In addition, by using a glued lens, the assembly components between the fourth lens and the fifth lens can be reduced, which is conducive to reducing the process and overall weight, and reducing costs; it can also reduce the light energy loss caused by reflection between lenses, improve the illumination of the image plane, and weaken ghost images; it can also make the light smoothly transition when passing through the glued surface, and reduce the tolerance sensitivity of the lens during assembly; it can also reasonably allocate the focal length of the fourth lens and the fifth lens, and the material of these two lenses is 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 a high refractive index and a low Abbe number, and the fifth lens can be made of a material with a low refractive index and a high Abbe number. The glued lens of the two materials can effectively correct the chromatic aberration of the optical lens. As an example, the fourth lens has negative optical power and the fifth lens has positive optical power. By making the fourth lens a negative lens, the edge light and the central light of each field of view can be clearly distinguished, which is beneficial to the aberration correction of the center and edge light of each field of view, and realizes high resolution of the optical lens. At the same time, making the fifth lens a positive lens can make the light emitted from the fourth lens smoothly transition to the rear, thereby reducing the height of the light incident to the rear.

[0110] In an exemplary embodiment, the sixth lens may have positive focal power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a convex surface. By designing the sixth lens as a biconvex positive lens, the angle of the incident light can be compressed, so that the light emitted from the fifth lens converges smoothly to the imaging surface, further making the light trend smoothly transition, which is conducive to reducing the back-end chip diameter.

[0111] In an exemplary embodiment, the sixth lens may have positive focal power, and its first side surface may be, for example, a concave surface, and its second side surface may be, for example, a convex surface. By designing the sixth lens in the above form, the light emitted from the fifth lens can be first diverged and then converged, and the height of the large-angle edge light 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 resolution of the optical lens, and is not easy to reflect with the photosensitive chip or the protective glass, reducing the energy of the ghost image on the imaging screen and reducing the interference effect.

[0112] In an exemplary embodiment, the sixth lens may have a negative optical power, and its first side surface may be, for example, a convex surface, and its second side surface may be, for example, a concave surface. The sixth lens collects light emitted from the fifth lens. Since the incident angle of the light on the first side surface of the sixth lens is small, by designing the first side surface of the sixth lens as a convex surface, more edge field light can be collected and the light can smoothly reach the imaging surface, thereby achieving a large field angle of the optical lens. At the same time, by designing the second side surface of the sixth lens as a concave surface, it is possible to avoid excessive convergence of light emitted from the first side surface of the sixth lens, and adjust the aperture of the back-end chip.

[0113] In an exemplary embodiment, at least two of the first to sixth lenses are configured as aspherical lenses. For example, the second lens and the sixth lens are configured as aspherical lenses. By configuring at least two of the first to sixth lenses as aspherical lenses, it is beneficial to correct the aberration of the optical lens and improve the resolution of the optical lens.

[0114] In an exemplary embodiment, the optical lens further includes an aperture, which may be, for example, disposed between the third lens and the fourth lens. By disposing the aperture between the third lens and the fourth lens, it is beneficial to effectively converge the light entering the optical lens, reduce the aperture of the rear lens of the optical lens, and reduce the assembly sensitivity of the optical lens. It should be understood that the aperture is disposed between the third lens and the fourth lens for exemplary purposes only, and the present application does not impose any specific restrictions thereto, and the aperture may also be disposed at other positions according to actual needs.

[0115] In an exemplary embodiment, the optical lens further includes a filter between the sixth lens and the imaging surface or the image source surface to filter light with different wavelengths. The optical lens may also be provided with a protective glass between the filter and the imaging surface according to actual needs to prevent internal components (e.g., chips) of the optical lens from being damaged.

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

[0117] In an exemplary embodiment, the optical back focus BFL of the optical lens and the total optical length TTL of the optical lens can satisfy: BFL / TTL≥0.2. In the example, BFL / TTL≥0.25, and further, 0.275≤BFL / TTL≤0.7. Reasonable control of the relationship between the optical back focus of the optical lens and the total optical length of the optical lens can enable the optical lens to meet the special requirements of long back focus, ensure that the light emitted from the second side of the sixth lens and hitting the imaging surface has a relatively smooth trend, which is conducive to smooth transition of light, reduce the sensitivity of the optical lens, and improve the resolution of the optical lens. At the same time, it can also reserve space for the installation and focusing of optical elements to avoid interference between optical elements.

[0118] In an exemplary embodiment, the entire set of focal length values ​​F of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light 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 the example, 0.65≤(F×θ) / D≤2. Reasonable control of the relationship between the entire set of focal length values ​​of the optical lens, the arc value of the maximum field angle of the optical lens, and the maximum light aperture of the first side surface of the first lens corresponding to the maximum field angle of the optical lens can make the front port diameter of the optical lens smaller and reduce the volume of the optical lens, thereby realizing the miniaturization of the optical lens.

[0119] In an exemplary embodiment, the whole set of focal length values ​​F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens can satisfy: 0.4≤F / H≤1.3. In the example, 0.5≤F / H≤1.0. When the image height is constant, the smaller the whole set of focal length values ​​of the optical lens, the greater the distortion of the optical lens, which means that the whole set of focal length values ​​of the optical lens not only affects the imaging effect of the central area of ​​the optical lens, but also affects the distortion of the edge field of view. The distortion of the edge field of view increases as the whole set of focal length values ​​of the optical lens decreases, that is, a small whole set of focal length values ​​of the optical lens is not conducive to achieving a small distortion effect, and affects the imaging effect of the edge field of view and the performance of the entire optical system. Therefore, by limiting the ratio of the whole set of focal length values ​​of the optical lens to the image height corresponding to the maximum field of view angle of the optical lens within a reasonable range, it is beneficial to improve the resolution of the optical lens.

[0120] In an exemplary embodiment, the whole set of focal length values ​​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 can satisfy: |(HF×θ) / (F×θ)|≤0.2. In the example, |(HF×θ) / (F×θ)|≤0.1. Reasonable control of the relationship between the whole set of focal length values ​​of the optical lens, the arc value of the maximum field angle of the optical lens, and the image height corresponding to the maximum field angle of the optical lens can increase the focal length of the optical lens while keeping the field angle of the optical lens and the size of the imaging surface unchanged, highlight the imaging effect of the central area of ​​the imaging surface of the optical lens, and facilitate the realization of small distortion of the optical lens.

[0121] In an exemplary embodiment, the maximum clear aperture D of the first side 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 may satisfy: (D×180°) / (H×FOV)≤5. In the example, (D×180°) / (H×FOV)≤3.5. Reasonable control of the relationship between the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view of the optical lens, the image height corresponding to the maximum field of view of the optical lens, and the maximum field of view of the optical lens is beneficial to reducing the front port diameter of the optical lens and realizing the miniaturization of the optical lens when the maximum field of view of the optical lens and the image height corresponding to the maximum field of view of the optical lens are determined.

[0122] In an exemplary embodiment, the entire focal length value F of the optical lens and the optical back focus BFL of the optical lens can satisfy: F / BFL≤1.2. In the example, 0.60≤F / BFL≤0.95. Reasonable control of the relationship between the focal length value of the optical lens and the optical back focus of the optical lens helps the optical lens meet the special requirements of long back focus, and at the same time can ensure that the light emitted from the second side surface of the sixth lens to the imaging surface has a relatively smooth trend, which is conducive to smooth transition of light and reduces the sensitivity of the optical lens.

[0123] In an exemplary embodiment, the focal length value F3 of the third lens and the focal length value F4 of the fourth lens may satisfy: 0.25≤|F3 / F4|≤3.5. In the example, 0.5≤|F3 / F4|≤2. Reasonable control of the 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 conducive to the smooth transition of light between the third lens and the fourth lens, and improves the image quality of the optical lens.

[0124] In an exemplary embodiment, 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 can satisfy: (d7+d8) / TTL≤0.35. In the example, 0.1≤(d7+d8) / TTL≤0.25. When the proportion of the middle thickness of the cemented lens formed by the fourth lens and the fifth lens is too large, the ability of the front lens to regulate light is reduced, and the light at the large-angle entrance pupil position is limited at the front lens position, resulting in low relative illumination of the optical lens. By constraining the ratio of the sum of the center 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 middle thickness of the cemented lens can be reasonably set while the total optical length of the optical lens remains unchanged, thereby enhancing the ability of the optical lens to regulate light, which is conducive to regulating more light to enter the rear system and improving the relative illumination of the optical lens.

[0125] In an exemplary embodiment, the focal length value F2 of the second lens and the focal length value F of the entire set of optical lenses can satisfy: |F2 / F|≥5. In the example, 8≤|F2 / F|≤120, and further, 10≤|F2 / F|≤100. The second lens has a greater impact on the thermal compensation of the optical lens. By reasonably allocating the focal length value of the second lens, the light can enter the optical system smoothly, which is beneficial to collecting the edge field of view light, and is also beneficial for the optical lens to maintain a good resolution at high and low temperatures, ensuring that the optical lens has good temperature performance. The second lens can preferably be a plastic lens.

[0126] In an exemplary embodiment, the vector height SAG11 of the first side surface of the sixth lens and the maximum aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens can satisfy: |SAG11 / (D11×2)|≤0.1. In the example, |SAG11 / (D11×2)|≤0.08. Reasonable control of the relationship between the vector height of the first side surface of the sixth lens and the maximum aperture D11 of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens can make the vector height of the first side surface of the sixth lens smaller, which helps to smoothly transition the light trend and reduce the sensitivity of the optical lens.

[0127] In an exemplary embodiment, the focal length value F3 of the third lens and the focal length value F of the entire optical lens group may satisfy: F3 / F≤5.5. In the example, 0.15≤F3 / F≤3.5. Reasonable control of the relationship between the focal length value of the third lens and the focal length value of the entire optical lens group can make the focal length value of the third lens a positive value and within a certain range, which helps to balance various aberrations of the optical lens.

[0128] In an exemplary embodiment, the maximum clear aperture D11 of the first side of the sixth lens corresponding to the maximum field angle of the optical lens, the maximum clear aperture D of the first side 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 can satisfy: (D11×D) / H≤7.5mm. In the example, 3mm≤(D11×D) / H≤6.5mm. Reasonable control of the relationship between the maximum clear aperture of the first side of the sixth lens corresponding to the maximum field angle of the optical lens, the maximum clear aperture of the first side 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, thereby ensuring the small aperture of the front end of the optical lens while satisfying the processability of the rear end lens.

[0129] In an exemplary embodiment, 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 focal length value F of the entire group of the optical lens can satisfy: |F / R5|+|F / R6|≤2. In the example, |F / R5|+|F / R6|≤1.5. Reasonable control of the relationship between the focal length value of the entire group of the optical lens and the radius of curvature 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 astigmatism, thereby improving the imaging quality of the optical lens.

[0130] In an exemplary embodiment, the vector height SAG12 of the second side surface of the sixth lens and the maximum light clearance aperture D12 of the second side surface of the sixth lens corresponding to the maximum field angle of the optical lens can satisfy: |arctan(SAG12 / D12)|≤0.2°. In the example, |arctan(SAG12 / D12)|≤0.1°. Reasonable control of the relationship between the vector height of the second side surface of the sixth lens and the maximum light clearance aperture of the second side surface of the sixth lens corresponding to the maximum field 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 second side surface of the sixth lens and the filter in the focal plane, so that the pupil image of the ghost image is 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 exemplary embodiment, the focal length value F6 of the sixth lens and the focal length value F of the entire set of optical lenses may satisfy: |F6 / F|≥2. In the example, 3.5≤|F6 / F|≤35. Reasonable control of the relationship between the focal length value of the sixth lens and the focal length value of the entire set of optical lenses can make the sixth lens have a larger focal length value, so that the deflection angle of the light converging or diverging at the sixth lens is small, which is conducive to achieving a small CRA of the optical lens, and is conducive to correcting the aberration of the optical lens, reducing the sensitivity of the optical lens, correcting the chromatic aberration of the optical lens, and improving the imaging quality of the lens.

[0132] In an exemplary embodiment, the total optical length TTL of the optical lens and the entire group focal length value F of the optical lens may satisfy: TTL / F≤5. In the example, 3≤TTL / F≤4.3. Reasonable control of the relationship between the total optical length of the optical lens and the entire group focal length value of the optical lens can make the optical lens have a smaller total optical length when the entire group focal length value of the optical lens is constant, which is conducive to miniaturization of the optical lens.

[0133] In an exemplary embodiment, the radius of curvature R5 of the first side surface of the third lens and the focal length value F of the entire group of the optical lens can satisfy: 0.2≤R5 / F≤4. In the example, 0.2≤R5 / F≤3. Reasonable control of the relationship between the radius of curvature of the first side surface of the third lens and the focal length value of the entire group of the optical lens can make the first side surface of the third lens convex, and the radius of curvature of the first side surface of the third lens is small, which is conducive to shrinking the front light, reducing the height of the light entering the third lens, and reducing the front lens diameter; the first side surface of the third lens can also compress the light emitted by the second lens, which is conducive to reducing the aberration caused by the light entering through the second lens, while making the lens structure compact, which is conducive to miniaturization of the optical lens.

[0134] In an exemplary embodiment, 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 may satisfy: TTL / d2≥8. In the example, 9≤TTL / d2≤15. Reasonable control of the relationship between the total optical length of the optical lens and the air interval between the first lens and the second lens on the optical axis can constrain the air interval between the first lens and the second lens, so that the proportion of the air interval between the first lens and the second lens to the total length of the optical lens group is small, which is conducive to reducing the total optical length of the optical lens, increasing the angle of the edge field of view light beam reaching the first side surface of the second lens, and improving the relative illumination of the edge field of view.

[0135] In an exemplary embodiment, the lens group length TL of the optical lens and the air interval d9 between the fifth lens and the sixth lens on the optical axis can satisfy: d9 / TL≥0.01. In the example, 0.02≤d9 / TL≤0.1. Reasonable control of the relationship between the lens group length of the optical lens and the air interval between the fifth lens and the sixth lens on the optical axis can make the air interval between the fifth lens and the sixth lens account for a larger proportion of the total length of the lens group of the optical lens. The larger air interval between the fifth lens and the sixth lens is conducive to reducing the reflection between the lenses and achieving a ghost-free effect; 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 when the total optical length remains unchanged. When the air interval between the fifth lens and the sixth lens is too large, the resolution of the optical lens decreases. By constraining the air interval 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 exemplary 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 the example, |R9 / R8|≥2.3. By controlling the radius of curvature of the first side surface and the second side surface of the fifth lens, the diffusion or convergence effect of the two sides of the fifth lens can be reasonably distributed, which is conducive to the smooth transition of light and the realization of a long back focus of the optical lens. At the same time, it can also reduce the sensitivity of the optical lens, improve the resolution quality of the optical lens, and ensure that the optical lens achieves a small aperture at the rear end.

[0137] The optical lens according to the above-mentioned embodiment of the present application may adopt multiple lenses, such as the six lenses mentioned above. By reasonably allocating the optical parameters of each lens, the optical lens has high light throughput, miniaturization, small aperture, long back focus, high resolution, small distortion, weak ghost image, small CRA, and high imaging quality, and can be well matched with, for example, vehicle-mounted chips without producing dark corners. The optical lens can simultaneously take into account the requirements of small size and low sensitivity. The optical lens has good temperature performance, small changes in imaging effects under high and low temperatures, and stable image quality. Therefore, the optical lens according to the above-mentioned embodiment 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 above refers to the on-axis distance from the first side surface of the first lens to the imaging plane or the image source plane; the lens group length TL of the optical lens refers to the on-axis 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 refers to the on-axis distance from the second side surface of the sixth lens to the imaging plane or the image source plane; and the maximum field of view FOV of the optical lens is associated with the image height H, which refers to the field of view corresponding to the image height H.

[0139] However, those skilled in the art should understand that, without departing from the technical solution claimed in the present application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although six lenses are described as an example in the embodiment, the optical lens is not limited to including six lenses. If necessary, the optical lens may also include other numbers of lenses.

[0140] Specific embodiments of the optical lens applicable to the above-mentioned embodiments are 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, the 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. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface and the second side surface of the second lens L2 have an inflection point. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

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

[0146]

[0147]

[0148] Table 1

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

[0150]

[0151] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is 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 cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 shows the cone coefficient k and the high-order coefficient A of each aspheric surface S3, S4, S10, S11 in Example 1 4 , A 6 , A 8 , A 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, the optical lens 102 includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence along the optical axis from the first side to the second side. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface and the second side surface of the second lens L2 have an inflection point. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

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

[0159]

[0160] Table 3

[0161] In Example 2, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 4 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 2 4 , A 6 , A 8 , A 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 3As 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 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. The stop STO may be disposed between the third lens L3 and the fourth lens L4.

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

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

[0169]

[0170] Table 5

[0171] In Example 3, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 6 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 3 4 , A 6 , A 8 , A 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 4Describe the optical lens according to Example 4 of the present application.

[0176] like Figure 4 As shown, the optical lens 104 includes: a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence along the optical axis from the first side to the second side. The fourth lens L4 and the fifth lens L5 are cemented 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. The stop STO can be disposed between the third lens L3 and the fourth lens L4.

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

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

[0179]

[0180] Table 7

[0181] In Example 4, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 8 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 4 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 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] The following reference Figure 5 Describe the optical lens according to Example 5 of the present application.

[0186] like Figure 5 As shown, the 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. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface and the second side surface of the sixth lens L6 have an inflection point. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

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

[0189]

[0190] Table 9

[0191] In Example 5, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 10 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 5 4 , A 6 , A 8 , A 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, the 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 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. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

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

[0199]

[0200] Table 11

[0201] In Example 6, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 12 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 6 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A16 .

[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, the 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 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. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

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

[0209]

[0210] Table 13

[0211] In Example 7, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 14 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 7 4 , A 6 , A 8 , A10 , 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 8 Describe the optical lens according to Example 8 of the present application.

[0216] like Figure 8 As shown, 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 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. The aperture stop STO can be disposed between the third lens L3 and the fourth lens L4.

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

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

[0219]

[0220] Table 15

[0221] In Example 8, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 16 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 84 , A 6 , A 8 , A 10 , A 12 , A 14 and A 16 .

[0222]

[0223]

[0224] Table 16

[0225] Example 9

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

[0227] like Fig. 9 As shown, the 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. The fourth lens L4 and the fifth lens L5 are cemented to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The first side surface and the second side surface of the sixth lens L6 have an inflection point. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

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

[0230]

[0231] Table 17

[0232] In Example 9, the first side surface and the second side surface of the second lens L2 and the sixth lens L6 are both aspherical surfaces. Table 18 shows the conic coefficient k and the high-order coefficient A of each aspherical surface S3, S4, S10, S11 that can be used in Example 9. 4 , A 6 , A 8 , A 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 Fig.10 An optical lens according to Example 10 of the present application is described.

[0237] like Fig.10 As shown, the 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 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. The aperture STO can be set between the third lens L3 and the fourth lens L4.

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

[0239] Table 19 shows the basic parameter table of the optical lens of Example 10, wherein the units of the radius of curvature 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 cone coefficient k and the high-order coefficient A of each aspheric surface S3, S4, S10, S11 that can be used in Example 10. 4 , A 6 , A 8 , A 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] Embodiment 11

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

[0248] like Fig.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 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. The aperture STO can be arranged between the third lens L3 and the fourth lens L4.

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

[0250] Table 21 shows the basic parameter table of the optical lens of Example 11, wherein the units of the radius of curvature 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 cone coefficient k and the high-order coefficient A of each aspheric surface S3, S4, S10, S11 that can be used in Example 11 4 , A 6 , A 8 , A 10 , 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] The following reference Fig.12 Describe the optical lens according to Example 12 of the present application.

[0260] like Fig.12 As shown, the optical lens 112 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 to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The aperture STO can be disposed between the third lens L3 and the fourth lens L4.

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

[0262] Table 23 shows the basic parameter table of the optical lens of Example 12, wherein the units of the radius of curvature and thickness / distance are all millimeters (mm).

[0263]

[0264]

[0265] Table 23

[0266] In Example 12, the first side surfaces and the second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical surfaces.

[0267] Table 24 shows the cone coefficient k and the high-order coefficient A of each aspheric surface S3, S4, S10, S11 that can be used in Example 12 4 , A 6 , A 8 , 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] Embodiment 13

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

[0272] like Fig.13As 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 to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The aperture STO can be disposed between the third lens L3 and the fourth lens L4.

[0273] The first lens L1 has negative power, and its first side surface S1 is concave, and its second side surface S2 is concave. The second lens L2 has positive power, and its first side surface S3 is convex, and its second side surface S4 is concave. The third lens L3 has positive power, and its first side surface S5 is convex, and its second side surface S6 is convex. The fourth lens L4 has positive power, and its first side surface S7 is concave, and its second side surface is convex. The fifth lens L5 has negative power, and its first side surface S8 is concave, and its second side surface S9 is convex. The sixth lens L6 has positive power, and 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 IMA is an imaging surface, light from an object passes through each surface S1 to S13 in sequence and is finally imaged on IMA. When IMA is an image source surface, light from IMA passes through each surface S13 to S1 in sequence and is finally projected on the object.

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

[0275]

[0276]

[0277] Table 25

[0278] In Example 13, the first side surfaces and the second side surfaces of the second lens L2 and the sixth lens L6 are both aspherical surfaces.

[0279] Table 26 shows the cone coefficient k and the high-order coefficient A of each aspheric surface S3, S4, S10, S11 that can be used in Example 13 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 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] Embodiment 14

[0283] The following reference Fig.14 Describe the optical lens according to Example 14 of the present application.

[0284] like Fig.14 As shown, the optical lens 114 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 to form a cemented lens. The second lens L2 and the sixth lens L6 are aspherical lenses. The aperture STO can be disposed between the third lens L3 and the fourth lens L4.

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

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

[0287]

[0288]

[0289] Table 27

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

[0291] Table 28 shows the cone coefficient k and the high-order coefficient A of each aspheric surface S3, S4, S10, S11 that can be used in Example 14 4 , A 6 , A 8 , A 10 , A 12 , A 14 and A 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 shows the basic parameters of the optical lenses in Examples 1 to 14, wherein F is the focal length of the entire 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 of the optical lens, θ is the radian value of 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, D is the maximum clear aperture of the first side surface of the first lens corresponding to the maximum field of view of the optical lens, and BFL is the optical The optical back focus of the lens, F1 is the focal length of the first lens, F2 is the focal length of the second lens, F3 is the focal length of the third lens, F4 is the focal length of the fourth lens, F5 is the focal length of the fifth lens, F6 is the focal length of the sixth lens, D11 is the maximum light clearance diameter of the first side surface of the sixth lens corresponding to the maximum field of view of the optical lens, D12 is the maximum light clearance diameter of the second side surface of the sixth lens corresponding to the maximum field of view of the optical lens, SAG11 is the sagittal height of the first side surface of the sixth lens, and SAG12 is the sagittal height of the second side surface of the sixth lens.

[0295]

[0296]

[0297] Table 29 In summary, the conditional expressions of each embodiment in Examples 1 to 14 satisfy the relationship shown in Table 30.

[0298]

[0299]

[0300] Table 30

[0301] The present application also provides an imaging device, which includes the optical lens in the above exemplary embodiment and an imaging element for converting an optical image formed by the optical lens into an electrical signal. The imaging element is arranged on an imaging surface or an image source surface, and it can be, for example, a photosensitive coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS).

[0302] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in this application (but not limited to) by each other.

Claims

1. An optical lens, characterized in that: The method comprises, in order from the first side to the second side along the optical axis: 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 power, wherein the first side surface of the third lens element is convex; a fourth lens having optical power; a fifth lens having optical power; and The sixth lens has optical power.

2. The optical lens according to claim 1, characterized in that: The optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≥0.

2.

3. The optical lens according to claim 1, characterized in that: The focal length value F of the entire set of the optical lens, the arc value θ of the maximum field angle of the optical lens, and the maximum light clearance diameter 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.

4. The optical lens according to claim 1, 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.

5. The optical lens according to claim 1, 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: |(HF×θ) / (F×θ)|≤0.

2.

6. The optical lens according to claim 1, characterized in that: The maximum light clearance aperture D of the first side surface 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 satisfy: (D×180°) / (H×FOV)≤5.

7. The optical lens according to claim 1, characterized in that: The entire focal length value F of the optical lens and the optical back focus BFL of the optical lens satisfy: F / BFL≤1.

2.

8. The optical lens according to claim 1, characterized in that: A focal length F3 of the third lens and a focal length F4 of the fourth lens satisfy: 0.25≤|F3 / F4|≤3.

5.

9. An optical lens, characterized in that: The method comprises, in order from the first side to the second side along the optical axis: A first lens having negative optical power; A second lens having optical power; A third lens having positive optical power; a fourth lens having optical power; a fifth lens having optical power; and The sixth lens has an optical power, The optical back focus BFL of the optical lens and the total optical length TTL of the optical lens satisfy: BFL / TTL≥0.

2.

10. An imaging device, characterized in that: The invention comprises an optical lens as claimed in any one of claims 1 to 9 and an imaging element for converting an optical image formed by the optical lens into an electrical signal.

Images