Optical lens
By using an optical lens with a six-lens structure and a specific optical power design, the problem of large size and heavy weight of traditional game console lenses has been solved, achieving miniaturization, a wide field of view, and high image quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-04-03
AI Technical Summary
Traditional game console lenses use an all-glass lens structure, resulting in a large system size and weight, which limits the lightweight design of game devices and increases manufacturing costs.
It adopts a six-lens structure, including lenses with specific optical power and surface shape, to meet the specific relationship between total optical length and aperture value, and combines aspherical lenses and glass-plastic hybrid materials to optimize the design of the optical lens.
It achieves miniaturization of optical lenses, large field of view, large aperture, and high imaging quality, while reducing aberrations and chromatic aberration and improving image quality.
Smart Images
Figure CN121784931A_ABST
Abstract
Description
Technical Field
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[0001] The present invention relates to the technical field of imaging lenses, and particularly to an optical lens. Background Art
[0002] In recent years, with the rapid development of the electronic game industry, the application scenarios and user experience requirements of game devices have been continuously expanding, from traditional home video games to immersive virtual reality and augmented reality interactions, and even to portable cloud game terminals; the requirements for supporting optical lenses have also been increasing day by day. However, most traditional game console lenses adopt a structure of all-glass lenses, which have problems of relatively large system volume and high weight, which not only limit the lightweight design of the appearance and structure of game devices, but also increase the overall manufacturing cost. Summary of the Invention
[0003] Aiming at the above problems, the purpose of the present invention is to provide an optical lens, which has the advantage of excellent imaging quality.<00000!9>
[0004] The present invention provides an optical lens, and the number of lenses with optical power is six. Along the optical axis from the object side to the imaging surface, it sequentially includes:
[0005] A first lens with negative optical power, whose object side is concave and whose image side is concave;
[0006] A second lens with positive optical power;
[0007] A third lens with positive optical power, whose object side is convex near the optical axis;
[0008] A fourth lens with positive optical power, whose object side is convex;
[0009] A fifth lens with negative optical power, whose object side is concave and whose image side is concave;
[0010] A sixth lens with negative optical power, whose object side is convex and whose image side is concave;
[0011] Wherein, the total optical length TTL of the optical lens and the aperture value Fno of the optical lens satisfy: 5.8mm < TTL / Fno < 7.6mm; the maximum field of view FOV of the optical lens and the aperture value Fno of the optical lens satisfy: 68° < FOV / Fno < 78°.
[0012] Further preferably, the true image height IH corresponding to the maximum field of view of the optical lens and the effective focal length f of the optical lens satisfy: 2 < IH / f < 2.2.
[0013] Further preferably, the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -2.5 < f1 / f < -2.1; the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: -7.4 < R1 / R2 < -2.4.
[0014] Further preferably, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 10 < f3 / f < 34.
[0015] Further preferably, the focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 0.9 < f4 / f < 1.2; the radius of curvature R7 of the object side surface of the fourth lens and the effective focal length f of the optical lens satisfy: 0.6 < R7 / f < 0.8.
[0016] Further preferably, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: -3.5 < f5 / f < -2.
[0017] Further preferably, the combined focal length f123 of the first lens, the second lens and the third lens and the effective focal length f of the optical lens satisfy: -4.1 < f123 / f < -2.2.
[0018] Further preferably, the combined focal length f456 of the fourth lens, the fifth lens and the sixth lens and the effective focal length f of the optical lens satisfy: 1 < f456 / f < 1.4. [
[0019] Further preferably, the clear aperture semi-diameter CSD11 of the object side surface of the first lens and the clear aperture semi-diameter CSD21 of the object side surface of the second lens satisfy: 1.25 < CSD11 / CSD21 < 1.55.
[0020] Further preferably, the clear aperture semi-diameter CSD11 of the object side surface of the first lens and the clear aperture semi-diameter CSD61 of the object side surface of the sixth lens satisfy: 2.4 < CSD11 / CSD61 < 3.5. [
[0021] Compared with the prior art, the optical lens provided by the present invention adopts six lenses with specific optical powers. Through specific surface shape combinations and reasonable optical power distributions, it can improve the imaging quality of the optical lens, reduce aberrations, improve the imaging quality of the optical lens, and enable the lens to have one or more advantages such as miniaturization, large viewing angle, large aperture, high pixel, and high imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:
[0023] Figure 1 This is a schematic diagram of the optical lens structure in Embodiment 1 of the present invention.
[0024] Figure 2 This is a field curvature curve diagram of the optical lens in Embodiment 1 of the present invention.
[0025] Figure 3 This is an axial aberration curve of the optical lens in Embodiment 1 of the present invention.
[0026] Figure 4 This is a chromatic aberration curve of the optical lens in Embodiment 1 of the present invention.
[0027] Figure 5 This is a schematic diagram of the optical lens structure in Embodiment 2 of the present invention.
[0028] Figure 6 This is a field curvature curve diagram of the optical lens in Embodiment 2 of the present invention.
[0029] Figure 7 This is an axial aberration curve of the optical lens in Embodiment 2 of the present invention.
[0030] Figure 8 This is a chromatic aberration curve of the optical lens in Embodiment 2 of the present invention.
[0031] Figure 9 This is a schematic diagram of the optical lens in Embodiment 3 of the present invention.
[0032] Figure 10 This is a field curvature curve diagram of the optical lens in Embodiment 3 of the present invention.
[0033] Figure 11 This is an axial aberration curve of the optical lens in Embodiment 3 of the present invention.
[0034] Figure 12 This is a chromatic aberration curve of the optical lens in Embodiment 3 of the present invention.
[0035] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation
[0036] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.
[0037] It should be noted that in this specification, the terms "first," "second," "third," etc., are used only to distinguish one feature from another and do not imply any limitation on the features. Therefore, without departing from the teachings of the invention, the first lens discussed below may also be referred to as the second lens or the third lens.
[0038] In the accompanying drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for ease of illustration. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are illustrated by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to those shown in the drawings. The drawings are for illustrative purposes only and are not strictly to scale.
[0039] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the location of the convexity is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the location of the concaveness is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the subject is called the object-side surface of the lens, and the surface of each lens closest to the imaging plane is called the image-side surface of the lens.
[0040] It should also be understood that the terms "comprising," "including," "having," "containing," and / or "comprising," when used in this specification, indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof. Furthermore, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire list of features, not individual elements in the list. Additionally, when describing embodiments of this application, the word "may" is used to mean "one or more embodiments of this application." And the term "exemplary" is intended to refer to an example or illustration.
[0041] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. It should also be understood that terms (e.g., those defined in common dictionaries) shall be interpreted as having the meaning consistent with their meaning in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so specified herein.
[0042] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0043] The optical lens provided by the embodiment of the present invention has six lenses with optical powers. The optical lens sequentially includes, along the optical axis from the object side to the imaging surface: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens.
[0044] In some embodiments, the first lens may have a negative optical power, its object side surface is concave, and its image side surface is concave. The second lens may have a positive optical power, its object side surface may be concave or convex, and its image side surface may be concave or convex. The third lens may have a positive optical power, its object side surface is convex near the optical axis, and its image side surface may be concave or convex. The fourth lens may have a positive optical power, its object side surface is convex, and its image side surface may be concave or convex. The fifth lens may have a negative optical power, its object side surface is concave, and its image side surface is concave. The sixth lens may have a negative optical power, its object side surface is convex, and its image side surface is concave.
[0045] In some embodiments, the optical lens may further include an aperture, and the aperture may be located between the third lens and the fourth lens. It can be understood that the aperture is used to limit the amount of incident light to change the brightness of the image. When the aperture is located between the third lens and the fourth lens, it is convenient for correcting the aperture aberration.
[0046] In some embodiments, the optical lens may further include a filter, and the filter is disposed between the sixth lens and the imaging surface. The filter is used to filter out interfering light to prevent the interfering light from reaching the imaging surface of the optical lens and affecting normal imaging.
[0047] In some embodiments, the total optical length TTL of the optical lens and the aperture value Fno of the optical lens satisfy: 5.8mm < TTL / Fno < 7.6mm. By satisfying the above conditional formula and controlling the relationship between the total length and the aperture value of the optical lens, it is ensured that the optical lens can meet the requirements of large aperture and miniaturization design, enabling the optical lens to obtain sufficient light transmission in a dim environment and meeting the needs of high-quality and high-definition shooting.
[0048] In some embodiments, the maximum field angle FOV of the optical lens and the aperture value Fno of the optical lens satisfy: 68° < FOV / Fno < 78°. By satisfying the above conditional formula, it can ensure that the optical lens has a certain large field angle, reduce the influence of off-axis aberration on the system, and at the same time ensure the improvement of the brightness of the imaging surface, thereby improving the imaging quality.
[0049] In some embodiments, the true image height IH corresponding to the maximum field angle of the optical lens and the effective focal length f of the optical lens satisfy: 2 < IH / f < 2.2. By satisfying the above conditional formula and controlling the ratio of the effective focal length to the image height of the optical lens, shortening the effective focal length can expand the field angle, enabling the optical lens to capture a wider object side space, and at the same time enabling the optical lens to match a large image plane chip, improving the imaging quality of the optical lens.
[0050] In some embodiments, the focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -2.5 < f1 / f < -2.1. Meeting the above conditional formula makes the first lens have a negative optical power, which can diverge the light rays passing through it, expand the field angle of the optical lens, and simplify the aberration correction of the overall optical lens and the balance of imaging quality.
[0051] In some embodiments, the radius of curvature R1 of the object side surface of the first lens and the radius of curvature R2 of the image side surface of the first lens satisfy: -7.4 < R1 / R2 < -2.4. Meeting the above conditional formula can reasonably control the radii of curvature of the object side surface and the image side surface of the first lens, making both the object side surface and the image side surface of the first lens concave surfaces. This allows light rays with a larger angle with respect to the optical axis to enter the optical lens, which helps to further increase the field angle of the optical lens. At the same time, it is beneficial to the miniaturization of the optical lens and can correct the spherical aberration of the system.
[0052] In some embodiments, the focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 10 < f3 / f < 34. Meeting the above conditional formula makes the third lens have the function of converging light rays, which can further converge the light rays passing through the second lens, reduce the height of peripheral light rays, be beneficial to reducing the aperture of the rear lens, and at the same time be beneficial to balancing aberrations and improving resolution.
[0053] In some embodiments, the focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 0.9 < f4 / f < 1.2. Meeting the above conditional formula, by setting the fourth lens to have a relatively large positive optical power, it can further converge the light rays from the first three lenses, correct the aberration problems brought by the first three lenses, and can effectively improve the aberrations in the marginal field of view, thus enhancing the overall imaging quality of the optical lens.
[0054] In some embodiments, the radius of curvature R7 of the object side surface of the fourth lens and the effective focal length f of the optical lens satisfy: 0.6 < R7 / f < 0.8. Meeting the above conditional formula can reasonably control the radius of curvature of the object side surface of the fourth lens with respect to the effective focal length of the optical lens, reduce the eccentricity risk during the processing, and reduce the processing difficulty.
[0055] In some embodiments, the focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: -3.5 < f5 / f < -2. Meeting the above conditional formula, setting the fifth lens to have a negative optical power makes the large-field light rays slowly rise, changing the parallel light trend of the light beam to a divergent trend, which is beneficial to controlling the back focal length of the lens and is beneficial to achieving a large target surface.
[0056] In some embodiments, the combined focal length f123 of the first lens, the second lens, and the third lens and the effective focal length f of the optical lens satisfy: -4.1 < f123 / f < -2.2. Meeting the above conditional formula, the front lens group composed of the first lens, the second lens, and the third lens provides a negative optical power for the optical lens, which is conducive to large-angle light beams passing through and entering the aperture of the optical lens, so as to achieve the ultra-wide angle of the optical lens, and at the same time improve the image plane brightness of the large-angle field of view of the optical lens.
[0057] In some embodiments, the combined focal length f456 of the fourth lens, the fifth lens, and the sixth lens and the effective focal length f of the optical lens satisfy: 1 < f456 / f < 1.4. Meeting the above conditional formula, the rear lens group composed of the fourth lens, the fifth lens, and the sixth lens provides a positive optical power for the optical lens, which is conducive to correcting the chromatic aberration and field curvature of the optical lens, slowing down the light deflection angle, reducing the sensitivity, reducing the lens forming difficulty, and being able to achieve the balance of the overall spherical aberration and obtain good imaging quality of the on-axis field of view.
[0058] In some embodiments, the clear aperture semi-diameter CSD11 of the object side of the first lens and the clear aperture semi-diameter CSD21 of the object side of the second lens satisfy: 1.25 < CSD11 / CSD21 < 1.55. Meeting the above conditional formula, by setting the first lens to have a larger aperture, it is ensured that light in a larger range enters the optical lens, ensuring that the lens has a larger field of view angle and improving the imaging performance of the lens.
[0059] In some embodiments, the clear aperture semi-diameter CSD11 of the object side of the first lens and the clear aperture semi-diameter CSD61 of the object side of the sixth lens satisfy: 2.4 < CSD11 / CSD61 < 3.5. Meeting the above conditional formula, by controlling the ratio of the clear aperture semi-diameter of the object side end of the first lens to the clear aperture semi-diameter of the object side end of the sixth lens, the optical lens can have a smaller aperture size, which is convenient for being mounted on vehicle-mounted devices; at the same time, it is ensured that the optical lens can collect large-angle light, achieve large-field-of-view imaging of the optical lens, increase the imaging area of the optical lens, and improve the imaging quality.
[0060] In some embodiments, the clear aperture semi-diameter CSD52 of the image side of the fifth lens and the clear aperture semi-diameter CSD61 of the object side of the sixth lens satisfy: 0.9 < CSD52 / CSD61 < 1. Meeting the above conditional formula, by making the fifth lens cooperate with the sixth lens to control the beam angle, the marginal rays that cause large aberrations can be eliminated, the imaging quality of the central field of view can be improved, and at the same time, the lens volume and cost can be reduced.
[0061] In some embodiments, the clear aperture semi-diameter CSD52 of the image side of the fifth lens and the sagittal height SAG52 of the clear aperture semi-diameter of the image side of the fifth lens satisfy: 5.1 < CSD52 / SAG52 < 5.8. By satisfying the above conditional formula, by adjusting the surface shape of the edge region of the image side of the fifth lens, the ghost reflection energy can be reduced and the field curvature can be optimized, thereby improving the imaging quality of the optical lens.
[0062] In some embodiments, the distance CT12 between the first lens and the second lens on the optical axis and the central thickness CT2 of the second lens satisfy: 0.1 < CT12 / CT2 < 0.4. By satisfying the above conditional formula, it is possible to prevent the air gap between the first lens and the second lens from being too large, reducing the risk of field curvature, and it is also possible to prevent the thickness of the second lens from being too large, meeting the requirements of the miniaturized design of the optical lens.
[0063] In some embodiments, the object side curvature radius R11 of the sixth lens and the image side curvature radius R12 of the sixth lens satisfy: 1.2 < R11 / R12 < 1.4. By satisfying the above conditional formula, the object side and the image side of the sixth lens are reasonably configured, and axial chromatic aberration can be avoided, which is beneficial to improving the imaging quality of the optical lens.
[0064] In some embodiments, the optical lens satisfies the following conditional formula: 2.1 mm < f < 2.4 mm; 130° ≤ FOV ≤ 140°; 1.1 mm < EPD < 1.3 mm; 10 mm < TTL < 14 mm; 1.8 ≤ Fno ≤ 1.9; 4.4 mm < IH < 4.9 mm; 46° < CRA < 49°. In the above conditional formula, f represents the effective focal length of the optical lens, FOV represents the maximum field of view angle of the optical lens, EPD represents the entrance pupil diameter of the optical lens, Fno represents the aperture value of the optical lens, IH represents the true image height corresponding to the maximum field of view angle of the optical lens, and CRA represents the chief ray incident angle at the maximum image height of the optical lens. By satisfying the above conditional formula, the optical lens has at least one or more advantages of short focal length, ultra-large field of view angle, large entrance pupil diameter, short total length, large aperture, large image plane, low distortion, and low sensitivity characteristics.
[0065] In some embodiments, the six lenses in the optical lens can all be made of plastic lenses or adopt a glass-plastic hybrid material combination structure. Preferably, the optical lens of the present invention adopts a six-piece glass-plastic hybrid combination lens structure, which can improve the thermal stability performance. Specifically, the first lens can be made of a glass lens, and the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens are all plastic lenses; adopting a glass-plastic hybrid structure can effectively reduce costs, correct aberrations, reduce volume and weight, and provide an optical lens product with higher cost performance.
[0066] In some embodiments, the first, second, third, fourth, fifth, and sixth lenses can be spherical or aspherical lenses. Compared to spherical structures, aspherical structures can effectively reduce aberrations in the optical system, thereby reducing the number of lenses and their size, and better achieving lens miniaturization. More specifically, the first lens in the optical lens provided by this invention can be a spherical lens; the second, third, fourth, fifth, and sixth lenses can all be aspherical lenses.
[0067] In various embodiments of the present invention, when an aspherical lens is used, the shapes of each aspherical surface of the optical lens satisfy the following equations:
[0068]
[0069] Where z is the distance between the surface and the vertex of the surface in the direction of the optical axis, h is the distance from the optical axis to the surface, c is the curvature of the vertex of the surface, K is the quadratic surface coefficient, and B, C, D, E, F, G, and H are the fourth, sixth, eighth, tenth, twelfth, fourteenth, and sixteenth order surface coefficients, respectively.
[0070] The present invention will be further described below with reference to several embodiments. In each embodiment, the thickness, radius of curvature, and material selection of each lens in the optical lens are different; for specific differences, please refer to the parameter tables of each embodiment. The following embodiments are merely preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the following embodiments. Any changes, substitutions, combinations, or simplifications made without departing from the innovative points of the present invention should be considered equivalent substitutions and are included within the protection scope of the present invention.
[0071] Example 1
[0072] Please see Figure 1 The diagram shows a schematic of the structure of the optical lens 100 provided in Embodiment 1 of the present invention. The optical lens 100 includes, along the optical axis from the object side to the imaging surface S15, the following components in sequence: a first lens L1, a second lens L2, a third lens L3, an aperture ST, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a filter G1.
[0073] Among them, the first lens L1 has negative optical power, its object side S1 is concave, and its image side S2 is concave.
[0074] The second lens L2 has positive optical power, its object side S3 is concave, and its image side S4 is convex.
[0075] The third lens L3 has positive optical power, its object side S5 is convex near the optical axis, and its image side S6 is convex.
[0076] The fourth lens L4 has positive optical power, its object side S7 is convex, and its image side S8 is convex.
[0077] The fifth lens L5 has negative optical power, its object side S9 is concave, and its image side S10 is concave.
[0078] The sixth lens L6 has negative optical power, its object side S11 is convex, and its image side S12 is concave.
[0079] The object-side surface S13 and the image-side surface S14 of filter G1 are both planar.
[0080] The imaging plane S15 is a plane.
[0081] The first lens L1 is a glass spherical lens; the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, and the sixth lens L6 are all plastic aspherical lenses.
[0082] The relevant parameters of each lens in the optical lens 100 in Example 1 are shown in Table 1-1.
[0083] Table 1-1
[0084]
[0085] The surface profile parameters of the aspherical lens of the optical lens 100 in Example 1 are shown in Table 1-2.
[0086] Table 1-2
[0087]
[0088]
[0089] In this embodiment, the astigmatism curve, axial aberration curve, and transverse chromatic aberration curve of the optical lens 100 are respectively as follows: Figure 2 , Figure 3 , Figure 4 As shown.
[0090] Figure 2 The astigmatism curve of Example 1 is shown, which represents the astigmatism of light in the meridional and sagittal image planes. The horizontal axis represents the offset (unit: mm), and the vertical axis represents the half field of view (unit: °). As can be seen from the figure, the astigmatism in the meridional and sagittal image planes is controlled within -0.1 mm to 0.05 mm, indicating that the optical lens can effectively correct the field curvature.
[0091] Figure 3The axial aberration curve of Example 1 is shown, which represents the aberration of each wavelength on the optical axis at the imaging plane. The horizontal axis represents the axial aberration value (unit: mm), and the vertical axis represents the normalized pupil radius. As can be seen from the figure, the axial aberration offset is controlled within -0.03 mm to 0.02 mm, indicating that the optical lens can correct axial aberration well.
[0092] Figure 4 The diagram shows the transverse chromatic aberration curves for Example 1, representing the chromatic aberration of each wavelength relative to the center wavelength (0.555 μm) at different image heights on the imaging plane. The horizontal axis represents the transverse chromatic aberration value of each wavelength relative to the center wavelength (unit: μm), and the vertical axis represents the normalized field of view. As can be seen from the diagram, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±2 μm, indicating that the optical lens can effectively correct chromatic aberration.
[0093] Example 2
[0094] Please see Figure 5 The figure shows a schematic diagram of the structure of the optical lens 200 provided in Embodiment 2 of the present invention. The main difference between this embodiment and Embodiment 1 is that the image-side surface S6 of the third lens L3 is concave; the image-side surface S8 of the fourth lens L4 is concave; and the optical parameters such as the radius of curvature and lens thickness of each lens surface are different.
[0095] The relevant parameters of each lens in the optical lens 200 in Example 2 are shown in Table 2-1.
[0096] Table 2-1
[0097]
[0098]
[0099] The surface profile parameters of the aspherical lens of the optical lens 200 in Example 2 are shown in Table 2-2.
[0100] Table 2-2
[0101] Face number K B C D E F G H S3 2.95E+01 -7.44E-03 -4.76E-05 7.68E-05 1.24E-06 2.12E-06 3.46E-07 -5.73E-08 S4 5.17E+01 1.78E-03 2.89E-04 7.82E-05 6.75E-05 -5.35E-06 -8.05E-06 1.93E-06 S5 9.46E-01 1.76E-03 -5.08E-04 -4.89E-05 -1.30E-04 2.14E-05 -2.14E-06 -5.11E-07 S6 -5.64E+01 -1.22E-02 -1.00E-02 -2.70E-05 1.66E-03 -8.40E-06 -5.62E-04 1.71E-04 S7 -6.13E-01 1.82E-03 8.34E-03 -3.65E-03 3.77E-03 -1.38E-03 3.40E-03 -2.31E-03 S8 -9.87E+01 -4.77E-03 1.81E-02 -1.01E-02 2.85E-04 4.16E-04 -2.48E-03 8.84E-04 S9 9.15E+00 4.97E-02 1.54E-02 2.86E-03 7.35E-03 -8.31E-03 4.28E-03 -4.16E-05 S10 9.81E+01 1.05E-01 3.33E-02 2.55E-02 5.03E-04 8.17E-03 1.35E-02 9.19E-03 S11 4.39E-02 -3.60E-02 -1.65E-03 2.98E-04 8.05E-03 4.45E-03 8.29E-05 -2.93E-03 S12 -1.33E-01 -2.45E-02 -1.16E-02 2.18E-03 1.15E-03 -7.06E-04 -3.64E-04 2.21E-04
[0102] In this embodiment, the astigmatism curve, axial aberration curve, and transverse chromatic aberration curve of the optical lens 200 are respectively as follows: Figure 6 , Figure 7 , Figure 8 As shown.
[0103] from Figure 6 As can be seen, the astigmatism of the meridional and sagittal image planes is controlled within -0.05mm to 0.1mm, indicating that the optical lens can effectively correct field curvature.
[0104] from Figure 7 As can be seen, the axial aberration offset is controlled within -0.04mm to 0.02mm, indicating that the optical lens can effectively correct axial aberration.
[0105] from Figure 8 As can be seen, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within -2μm to 3μm, indicating that the optical lens can correct chromatic aberration well.
[0106] Example 3
[0107] Please see Figure 9 The figure shows a schematic diagram of the structure of the optical lens 300 provided in Embodiment 3 of the present invention. The main difference between this embodiment and Embodiment 1 is that the object side surface S3 of the second lens L2 is a convex surface; the image side surface S4 of the second lens L2 is a concave surface; and the optical parameters such as the radius of curvature and lens thickness of each lens surface are different.
[0108] The relevant parameters of each lens in the optical lens 300 in Example 3 are shown in Table 3-1.
[0109] Table 3-1
[0110]
[0111]
[0112] The surface profile parameters of the aspherical lens of the optical lens 300 in Example 3 are shown in Table 3-2.
[0113] Table 3-2
[0114] Face number K B C D E F G H S3 2.01E+01 -8.05E-03 -4.18E-04 5.77E-05 1.51E-06 2.64E-06 3.51E-07 -9.37E-08 S4 -1.00E+02 -8.04E-04 1.65E-03 2.50E-04 5.00E-05 -1.02E-05 -6.85E-07 9.71E-06 S5 -1.00E+02 -3.28E-03 -1.69E-03 -3.17E-04 -1.51E-04 1.88E-05 -6.93E-06 -7.65E-06 S6 -1.00E+02 -6.83E-03 -8.78E-03 -3.11E-04 1.25E-03 -1.99E-04 -5.78E-04 2.47E-04 S7 -6.02E-01 9.34E-03 5.47E-03 -5.78E-03 4.11E-04 -1.04E-03 3.98E-03 -1.69E-03 S8 -1.50E+00 3.30E-03 2.20E-02 -8.61E-03 1.09E-03 1.22E-03 -5.25E-05 -4.42E-04 S9 1.66E+01 3.71E-02 4.95E-03 2.24E-03 6.84E-03 -9.06E-03 3.50E-03 -2.27E-04 S10 7.77E+01 8.26E-02 8.25E-03 1.48E-02 -2.55E-03 3.18E-03 4.48E-03 -3.66E-03 S11 1.73E-01 -4.28E-02 2.86E-03 -5.46E-03 -4.52E-04 -2.83E-03 -2.75E-03 5.35E-04 S12 -1.95E-01 -2.52E-02 -1.49E-02 1.90E-04 8.04E-04 -4.60E-04 -2.86E-04 1.57E-04
[0115] In this embodiment, the astigmatism curve, axial aberration curve, and transverse chromatic aberration curve of the optical lens 300 are respectively as follows: Figure 10 , Figure 11 , Figure 12 As shown.
[0116] from Figure 10 As can be seen, the astigmatism of the meridional and sagittal image planes is controlled within ±0.05mm, indicating that the optical lens can effectively correct field curvature.
[0117] from Figure 11 As can be seen, the axial aberration offset is controlled within -0.04mm to 0.03mm, indicating that the optical lens can effectively correct axial aberration.
[0118] from Figure 12 As can be seen, the transverse chromatic aberration of the longest and shortest wavelengths is controlled within ±2μm, indicating that the optical lens can effectively correct chromatic aberration.
[0119] Please refer to Table 4 for the optical characteristics corresponding to each of the above embodiments, including the effective focal length f, total optical length TTL, aperture value Fno, true image height IH corresponding to the maximum field of view, principal ray incident angle CRA at the maximum image height, maximum field of view FOV, and the values corresponding to each conditional expression in each embodiment.
[0120] Table 4
[0121] Parameters and conditional expressions Example 1 Example 2 Example 3 f(mm) 2.26 2.12 2.31 EPD (mm) 1.19 1.18 1.25 TTL(mm) 11.72 13.56 10.78 Fno 1.90 1.80 1.85 CRA(°) 46.77 48.35 46.65 IH(mm) 4.80 4.44 4.77 FOV (°) 130.00 140.00 132.00 TTL / Fno(mm) 6.17 7.53 5.83 FOV / Fno(°) 68.42 77.78 71.35 IH / f 2.13 2.10 2.06 f1 / f -2.34 -2.41 -2.20 R1 / R2 -7.37 -5.08 -2.47 f3 / f 20.11 10.30 33.84 f4 / f 1.02 1.12 1.00 R7 / f 0.74 0.61 0.67 f5 / f -2.06 -2.29 -3.40 f123 / f -3.61 -4.04 -2.27 f456 / f 1.30 1.35 1.06 CSD11 / CSD21 1.36 1.53 1.30 CSD11 / CSD61 2.50 3.46 2.68 CSD52 / CSD61 0.92 0.96 0.99 CSD52 / SAG52 5.72 5.71 5.20 CT12 / CT2 0.27 0.33 0.15 R11 / R12 1.29 1.23 1.30
[0122] In summary, the optical lens provided by the present invention employs six lenses with specific optical power. Through specific surface shape matching and reasonable optical power distribution, it can improve the imaging quality of the optical lens, reduce aberrations, and enhance the imaging quality of the optical lens, giving the lens one or more advantages such as miniaturization, large field of view, large aperture, high pixel count, and high imaging quality.
[0123] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0124] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.
Claims
1. An optical lens comprising six lenses having optical power, characterized in that, It sequentially includes from the object side to the imaging surface along the optical axis: A first lens with negative optical power, whose object side is concave and whose image side is concave; A second lens with positive optical power; A third lens with positive optical power, whose object side is convex near the optical axis; A fourth lens with positive optical power, whose object side is convex; A fifth lens with negative optical power, whose object side is concave and whose image side is concave; A sixth lens with negative optical power, whose object side is convex and whose image side is concave; Wherein, the total optical length TTL of the optical lens and the aperture value Fno of the optical lens satisfy: 5.8mm < TTL / Fno < 7.6mm; the maximum field angle FOV of the optical lens and the aperture value Fno of the optical lens satisfy: 68° < FOV / Fno < 78°.
2. The optical lens according to claim 1, characterized in that, The true image height IH corresponding to the maximum field angle of the optical lens and the effective focal length f of the optical lens satisfy: 2 < IH / f < 2.
2.
3. The optical lens according to claim 1, characterized in that, The focal length f1 of the first lens and the effective focal length f of the optical lens satisfy: -2.5 < f1 / f < -2.1; the curvature radius R1 of the object side of the first lens and the curvature radius R2 of the image side of the first lens satisfy: -7.4 < R1 / R2 < -2.
4.
4. The optical lens according to claim 1, characterized in that, The focal length f3 of the third lens and the effective focal length f of the optical lens satisfy: 10 < f3 / f < 34.
5. The optical lens according to claim 1, characterized in that, The focal length f4 of the fourth lens and the effective focal length f of the optical lens satisfy: 0.9 < f4 / f < 1.2; the curvature radius R7 of the object side of the fourth lens and the effective focal length f of the optical lens satisfy: 0.6 < R7 / f < 0.
8.
6. The optical lens according to claim 1, characterized in that, The focal length f5 of the fifth lens and the effective focal length f of the optical lens satisfy: -3.5 < f5 / f < -2.
7. The optical lens according to claim 1, characterized in that, The combined focal length f123 of the first lens, the second lens and the third lens and the effective focal length f of the optical lens satisfy: -4.1 < f123 / f < -2.
2.
8. The optical lens according to claim 1, characterized in that, The combined focal length f456 of the fourth lens, the fifth lens and the sixth lens and the effective focal length f of the optical lens satisfy: 1 < f456 / f < 1.
4.
9. The optical lens according to claim 1, characterized in that, The clear aperture semi-diameter CSD11 of the object side of the first lens and the clear aperture semi-diameter CSD21 of the object side of the second lens satisfy: 1.25 < CSD11 / CSD21 < 1.
55.
10. The optical lens according to claim 1, characterized in that, The clear aperture semi-diameter CSD11 of the object side of the first lens and the clear aperture semi-diameter CSD61 of the object side of the sixth lens satisfy: 2.4 < CSD11 / CSD61 < 3.5.