Large-light-circle prime lens
By adopting three lens group structures with positive optical power, especially the floating focus function of the second lens group, the problem of breathing effect of large aperture fixed focus lenses during focus is solved, and clearer imaging and reduction are achieved Small lens breathing meets the requirements of high depth of field and high resolution.
Patent Information
- Application Number
- CN202323585586.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2033-12-26
AI Technical Summary
Existing large aperture fixed-focus lenses are prone to breathing effects during the focusing process, affecting the lens position and depth of field effect.
A structure consisting of three lens groups, wherein the first lens group and the third lens group have positive power, and the second lens group can float to focus, ensuring clear imaging at different objects distances, and passing through a specific lens group Combination and material selection reduce changes in light incident focus.
It effectively suppresses the respiration effect of the lens, ensures the highlight and blurring of the picture focus, while maintaining high-resolution imaging quality.
Smart Images
Figure CN222145305U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of optical lenses, and more specifically, to a large aperture fixed-focus lens. Background Art
[0002] With the development of the movie lens industry, the continuous enrichment of film and television photography equipment, and the diversification of shooting environments, in addition to the increasingly stringent requirements for cameras, the requirements for lenses are also getting higher and higher.
[0003] In general, professional or semi-professional lenses have higher requirements for the lens imaging target surface and aperture. In addition to bringing in more light, large aperture lenses allow shooting in low-light environments. Another reason why people pursue large aperture lenses is the depth of field, especially wide-angle lenses, which have a large depth of field and are less than satisfactory in highlighting the key points. Large aperture lenses can solve this problem. Large aperture lenses can reduce the depth of field, making the key points of the picture more prominent, and are more likely to bring a more blurred out-of-focus effect.
[0004] However, existing large aperture fixed focus lenses are prone to breathing effects during the focusing process. When you want to change the focus of the picture during shooting, the focusing lens group in the lens will start to move to focus. As part of the lens group starts to move, sometimes this displacement will affect the position of other lenses and lens groups. Although it is only a slight change, it will also cause a slight zoom effect. This change is called the "breathing effect" of the lens. Utility Model Content
[0005] The purpose of the embodiments of the present application is to provide a large aperture fixed focus lens to solve the technical problem in the prior art that a breathing effect is easily generated during the focusing process.
[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a large aperture fixed-focus lens, comprising a first lens group, a second lens group and a third lens group arranged in sequence from the object side to the image side, the optical focal power of the first lens group is positive; the optical focal power of the second lens group is positive; the first lens group can float focus; the optical focal power of the third lens group is positive.
[0007] Optionally, the first lens group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens arranged in sequence from the object side to the image side; the first lens is a meniscus lens with negative optical focal power; the second lens is a meniscus lens with negative optical focal power; the third lens has negative optical focal power; the fourth lens has positive optical focal power; the third lens and the fourth lens are cemented to form a first cemented lens, and the optical focal power of the first cemented lens is positive; the fifth lens is a double convex lens or a convex-plano lens with positive optical focal power.
[0008] Optionally, the second lens group includes a sixth lens, a seventh lens, an aperture, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens arranged in sequence from the object side to the image side; the sixth lens has a positive optical focal power; the seventh lens has a negative optical focal power; the eighth lens has a positive optical focal power; the ninth lens has a negative optical focal power; the eighth lens and the ninth lens are cemented to form a second cemented lens, and the optical focal power of the second cemented lens is negative; the optical focal power of the tenth lens is negative; the optical focal power of the eleventh lens is positive; the tenth lens and the eleventh lens are cemented to form a third cemented lens, and the optical focal power of the third cemented lens is positive; the optical focal power of the twelfth lens is positive.
[0009] Optionally, the third lens group includes a thirteenth lens and a fourteenth lens arranged in sequence from the object side to the image side; the optical focal power of the thirteenth lens is negative; and the optical focal power of the fourteenth lens is positive.
[0010] Optionally, the refractive index and Abbe number of the first lens satisfy the following conditional formula:
[0011] 1.84≤nd1≤2.01;
[0012] 17.9≤vd1≤40.9;
[0013] Wherein, nd1 is the refractive index of the first lens, and vd1 is the Abbe number of the first lens.
[0014] Optionally, the second lens is a glass aspheric lens; and the twelfth lens is a glass aspheric lens.
[0015] Optionally, the effective focal length of the first lens group and the effective focal length of the third lens group satisfy the following conditional formula:
[0016] 0.8≤f1 / f3≤2.6;
[0017] Wherein, f1 is the effective focal length of the first lens group; f3 is the effective focal length of the third lens group. Optionally, the effective focal length of the second lens group and the effective focal length of the lens meet the following conditional formula:
[0018] 2.6≤f2 / f≤13;
[0019] Among them, f2 is the effective focal length of the second lens group; f is the effective focal length of the lens.
[0020] Optionally, the total optical length of the lens and the effective aperture of the largest lens element of the lens satisfy the following conditional formula:
[0021] 2.75≤TTL / SD≤2.96;
[0022] Among them, TTL is the total optical length of the lens, and SD is the effective aperture of the largest lens element.
[0023] Optionally, the field of view angle of the lens and the aperture of the lens satisfy the following conditional expressions respectively:
[0024] 1.2≤Fno≤1.6;
[0025] 74.6≥FOV≥102.8;
[0026] Among them, FOV is the field of view of the lens, and Fno is the aperture of the lens.
[0027] The large aperture fixed focus lens provided by the present application has the following beneficial effects: compared with the prior art, in the present application, by adopting a three-lens group structure with positive focal powers, and the second lens group can perform floating focus, it is ensured that the imaging at different object distances can be clear. At the same time, when the outgoing light of the first lens group enters the second lens group, the incident focal power of the light does not change much during the floating focus process, so that the breathing of the entire lens is lighter, and the breathing effect is effectively suppressed. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0029] Figure 1 A schematic diagram of the structure of a large aperture fixed focus lens provided in Example 1 of the present application;
[0030] Figure 2 This is the MTH diagram of the large aperture fixed focus lens provided in Example 1 of the present application;
[0031] Figure 3 This is an axial chromatic aberration diagram of the large aperture fixed focus lens provided in Example 1 of the present application;
[0032] Figure 4 A schematic diagram of the structure of a large aperture fixed focus lens provided in Embodiment 2 of the present application;
[0033] Figure 5 This is the MTH diagram of the large aperture fixed focus lens provided in Example 2 of the present application;
[0034] Figure 6 This is a diagram of the axial chromatic aberration of the large aperture fixed focus lens provided in Example 2 of the present application.
[0035] Among them, the reference numerals in the figure are:
[0036] 100 - first lens group; 101 - first lens; 102 - second lens; 103 - third lens; 104 - fourth lens; 105 - fifth lens;
[0037] 200 - second lens group; 201 - sixth lens; 202 - seventh lens; 203 - aperture; 204 - eighth lens; 205 - ninth lens; 206 - tenth lens; 207 - eleventh lens; 208 - twelfth lens;
[0038] 300 - third lens group; 301 - thirteenth lens; 302 - fourteenth lens;
[0039] 400-Protective glass;
[0040] 500-image plane. DETAILED DESCRIPTION
[0041] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0042] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0043] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0045] Please also read Figure 1 and Figure 4Now, the large aperture fixed focus lens provided by the embodiment of the present application is described. The large aperture fixed focus lens comprises a first lens group 100, a second lens group 200 and a third lens group 300 arranged in sequence from the object side to the image side, the first lens group 100 has a positive focal length; the second lens group 200 has a positive focal length; the first lens group 100 can be floating focus; the third lens group 300 has a positive focal length.
[0046] Compared with the prior art, the large aperture fixed focus lens provided in the embodiment of the present application adopts a three-lens group structure with positive focal powers, so that the second lens group 200 can perform floating focus, ensuring that the imaging at different object distances is clear. At the same time, when the outgoing light of the first lens group 100 enters the second lens group 200, the incident focal power of the light does not change much during the floating focus process, thereby making the breathing of the entire lens lighter.
[0047] In one embodiment of the present application, please refer to Figure 1 and Figure 4 The first lens group 100 includes a first lens 101, a second lens 102, a third lens 103, a fourth lens 104 and a fifth lens 105, which are arranged in sequence from the object side to the image side; the first lens 101 is a meniscus lens with negative optical focal power; the second lens 102 is a meniscus lens with negative optical focal power; the third lens 103 has negative optical focal power; the fourth lens 104 has positive optical focal power; the third lens 103 and the fourth lens 104 are cemented to form a first cemented lens, and the optical focal power of the first cemented lens is positive; the fifth lens 105 is a double convex lens or a convex-planar lens with positive optical focal power.
[0048] In this embodiment, the first lens 101 and the second lens 102 are both meniscus lenses with negative optical power, which can compress light with a large incident angle. In addition, the first cemented lens with positive optical power and the fifth lens 105 with positive optical power can correct aberrations. Therefore, the reverse telephoto structure with negative front (optical power) and positive back (optical power) can effectively lengthen the back focus.
[0049] In one embodiment of the present application, please refer to Figure 1 and Figure 4The second lens group 200 includes a sixth lens 201, a seventh lens 202, an aperture 203, an eighth lens 204, a ninth lens 205, a tenth lens 206, an eleventh lens 207 and a twelfth lens 208, which are arranged in sequence from the object side to the image side; the optical focal power of the sixth lens 201 is positive; the optical focal power of the seventh lens 202 is negative; the optical focal power of the eighth lens 204 is positive; the optical focal power of the ninth lens 205 is negative; the eighth lens 204 and the ninth lens 205 are cemented to form a second cemented lens, and the optical focal power of the second cemented lens is negative; the optical focal power of the tenth lens 206 is negative; the optical focal power of the eleventh lens 207 is positive; the tenth lens 206 and the eleventh lens 207 are cemented to form a third cemented lens, and the optical focal power of the third cemented lens is positive; the optical focal power of the twelfth lens 208 is positive.
[0050] In this embodiment, the sixth lens 201, the seventh lens 202 and the second cemented lens are improvements on the Tessar lens structure (Tessar lens structure is an important variety of asymmetric positive lens) and can effectively eliminate spherical aberration, coma and vertical axis chromatic aberration under large aperture conditions. The third cemented lens and the twelfth lens 208 further correct spherical aberration and chromatic aberration to better ensure the overall aberration of the lens.
[0051] In one embodiment of the present application, please refer to Figure 1 and Figure 4 The third lens group 300 includes a thirteenth lens 301 and a fourteenth lens 302 arranged in sequence from the object side to the image side; the optical power of the thirteenth lens is negative; and the optical power of the fourteenth lens is positive.
[0052] In this embodiment, the combination of the thirteenth lens 301 with positive refractive power and the fourteenth lens 302 with negative refractive power can well correct spherical aberration and chromatic aberration, thereby achieving a better effect of intra-group aberration.
[0053] In one embodiment of the present application, the effective focal length of the first lens group 100 and the effective focal length of the third lens group 300 satisfy the following conditional formula:
[0054] 0.8≤f1 / f3≤2.6;
[0055] Wherein, f1 is the effective focal length of the first lens group 100 ; f3 is the effective focal length of the third lens group 300 .
[0056] It is understandable that if f1 / f3 < 0.8, the first lens group 100 will be complicated and the overall size of the lens will increase; if f1 / f3 > 2.6, the third lens group 300 will need to bear too much optical power, which is not conducive to the correction of aberrations. Therefore, satisfying 0.8 ≤ f1 / f3 ≤ 2.6 can make the lens more compact and is conducive to the correction of aberrations.
[0057] In one embodiment of the present application, the effective focal length of the second lens group 200 and the effective focal length of the lens satisfy the following conditional formula:
[0058] 2.6≤f2 / f≤13;
[0059] Wherein, f2 is the effective focal length of the second lens group 200; f is the effective focal length of the lens.
[0060] It is understandable that if f2 / f>2.6, the first lens group 100 and the third lens group 300 will be complicated, and the overall size of the lens will increase; if f2 / f<13, the second lens group 200 will easily have a larger breathing during the focusing process, which is not conducive to aberration correction. Therefore, satisfying 2.6≤f2 / f≤13 can make the lens structure simpler and the overall size of the lens smaller; and the breathing of the entire lens during the focusing process is lighter, which is conducive to aberration correction.
[0061] In one embodiment of the present application, the total optical length of the lens and the effective aperture of the largest lens element of the lens satisfy the following conditional formula:
[0062] 2.75≤TTL / SD≤2.96;
[0063] Among them, TTL is the total optical length of the lens, and SD is the effective aperture of the largest lens element.
[0064] By limiting the ratio of the total optical length of the lens to the effective aperture of the largest lens element within the range of [2.75, 2.96], the size of the optical system can be kept reasonable.
[0065] In one embodiment of the present application, the field of view angle of the lens and the aperture of the lens respectively satisfy the following conditional expressions:
[0066] 1.2≤Fno≤1.6;
[0067] 74.6≥FOV≥102.8;
[0068] Among them, FOV is the field of view of the lens, and Fno is the aperture of the lens.
[0069] By limiting the field of view of the lens to the range of [74.6, 10.8] and the aperture of the lens to the range of [1.2, 1.6], the lens architecture and lens index specifications can be kept reasonable.
[0070] In one embodiment of the present application, the refractive index and the Abbe number of the first lens 101 satisfy the following conditional formula:
[0071] 1.84≤nd1≤2.01;
[0072] 17.9≤vd1≤40.9;
[0073] Wherein, nd1 is the refractive index of the first lens 101 , and vd1 is the Abbe number of the first lens 101 .
[0074] The material with a high refractive index can make the surface of the first lens 101 relatively flat, which is more conducive to the processability of the lens and can better reduce the angle of light under the processable surface.
[0075] In one embodiment of the present application, the second lens 102 is a glass aspherical lens; and the twelfth lens 208 is a glass aspherical lens.
[0076] In this embodiment, the second lens 102 uses a glass aspheric lens to better reduce the angle of light and reduce the size of the lens. The twelfth lens 208 uses a glass aspheric lens to reduce aberrations, especially spherical aberrations. The two aspheric lenses are arranged one in front and one in the back (the two aspheric lenses are arranged close to the front and rear ends of the lens, respectively), which can also effectively reduce distortion.
[0077] In one embodiment of the present application, please refer to Figure 1 and Figure 4 From the object side to the image side, a protective glass 400 is further provided behind the fourteenth lens 302, that is, the protective glass 400 is arranged between the fourteenth lens 302 and the image plane 500, and the protective glass 400 is used to protect the lens.
[0078] Embodiment 1
[0079] In this embodiment, the conditional data of the lens can be found in Table 1, and the lens parameters can be found in Table 2.
[0080] Table 1:
[0081] f1 / f3 2.08 f2 / f 3.577 TTL / SD 3.067 Fno 1.36 FOV 86.963 <![CDATA[nd1]]> 1.922866 <![CDATA[vd1]]> 20.8821
[0082] Table 2:
[0083]
[0084]
[0085] In Table 2, the surface number column shows the surface numbers when the surface on the object side is set as the first surface and the numbers are increased one by one toward the image side; the curvature radius column shows the curvature radius of a certain lens, when the curvature radius is positive, it indicates that the surface is curved toward the object side, and when the curvature radius is negative, it indicates that the surface is curved toward the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to its image side.
[0086] D1 is the distance between the fifth lens 105 and the sixth lens 201, and D2 is the distance between the twelfth lens 208 and the thirteenth lens 301. D1 and D2 ensure that the second lens group 200 can move in focus, wherein the travel range of D1 is 11.567 mm to 8.356 mm, and the travel range of D2 is 0.5 mm to 3.711 mm.
[0087] In this embodiment, both the second lens 102 and the twelfth lens 208 are glass aspherical lenses; please refer to Table 3 for their aspherical coefficients.
[0088] Table 3:
[0089]
[0090] Table 3 (continued):
[0091] Surface number A10 A12 A14 A16 s3 -3.084697E-13 1.357088E-16 2.645393E-19 -3.081775E-22 s4 4.154546E-13 -2.070358E-15 3.899641E-18 -2.957723E-21 S22 -1.074366E-14 1.823119E-17 / / S23 -4.970898E-15 6.741467E-18 / /
[0092] See also Figure 2 The MTH graph can be drawn based on the MTF graph. MTF is the abbreviation of Modulation Transfer Function. The H in MTH refers to the image height. Different line types in the MTH graph correspond to different line pairs. If the curve is higher and straighter, it means that the resolution and center-edge consistency of the lens are better. Figure 2 It can be seen from the figure that the variable aperture fixed focus lens provided in this embodiment can meet the requirement of high resolution.
[0093] See also Figure 3 This embodiment makes a good correction for the axial chromatic aberration of the large aperture fixed focus lens, so that the image will not have obvious purple or red edges or the image will not be blurred, thus meeting the high-resolution image quality requirements.
[0094] Embodiment 2
[0095] In this embodiment, the conditional data of the lens can be found in Table 4, and the lens parameters can be found in Table 5.
[0096] Table 4:
[0097] f1 / f3 1.236 f2 / f 11.755 TTL / SD 3.119 Fno 1.4 FOV 98.06 <![CDATA[nd1]]> 1.922866 vd1 20.8821
[0098] Table 5:
[0099]
[0100]
[0101] In Table 5, the surface number column shows the surface numbers when the surface on the object side is set as the first surface and the numbers are increased one by one toward the image side; the curvature radius column shows the curvature radius of a certain lens, when the curvature radius is positive, it indicates that the surface is curved toward the object side, and when the curvature radius is negative, it indicates that the surface is curved toward the image side; the center thickness column shows the surface spacing on the optical axis between each surface and the surface adjacent to its image side.
[0102] D1 is the distance between the fifth lens 105 and the sixth lens 201, and D2 is the distance between the twelfth lens 208 and the thirteenth lens 301. D1 and D2 ensure that the second lens group 200 can move in focus, wherein the travel range of D1 is 4.516 mm to 2.3383 mm, and the travel range of D2 is 0.5 mm to 2.6783 mm.
[0103] In this embodiment, both the second lens 102 and the twelfth lens 208 are glass aspherical lenses; please refer to Table 6 for their aspherical coefficients.
[0104] Table 6:
[0105] Surface number k A4 A6 A8 s3 10 5.034080E-05 -1.673857E-07 3.767487E-10 s4 0.766457 4.751780E-05 -1.605132E-07 1.710550E-10 S22 -0.751059494 -3.906343E-06 -7.190901E-10 7.589669E-12 S23 -0.171915266 1.952830E-06 -2.922058E-09 3.503378E-12
[0106] Table 6 (continued):
[0107] Surface number A10 A12 A14 A16 s3 -4.236014E-13 -3.039804E-16 1.482766E-18 -1.318988E-21 s4 4.565745E-13 -2.555703E-15 4.481733E-18 -3.071295E-21 S22 -3.211247E-14 3.997634E-17 / / S23 -1.615469E-14 1.367453E-17 / /
[0108] See also Figure 5 , Figure 5 The MTH diagram of the large aperture fixed focus lens provided in the embodiment of the present application; Figure 5 It can be seen from the figure that the variable aperture fixed focus lens provided in this embodiment can meet the requirement of high resolution.
[0109] See also Figure 6 This embodiment makes a good correction for the axial chromatic aberration of the large aperture fixed focus lens, so that the image will not have obvious purple or red edges or the image will not be blurred, thus meeting the high-resolution image quality requirements.
[0110] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A large aperture fixed focus lens, It is characterized in that Including the following settings from the object side to the image side: a first lens group, wherein the optical power of the first lens group is positive; a second lens group, wherein the optical power of the second lens group is positive; and the first lens group is capable of floating focus; as well as The third lens group has positive optical power.
2. The large aperture fixed focus lens according to claim 1, It is characterized in that The first lens group includes the following lenses arranged in order from the object side to the image side: A first lens, wherein the first lens is a meniscus lens with negative optical power; A second lens, wherein the second lens is a meniscus lens with negative optical power; A third lens, wherein the optical power of the third lens is negative; a fourth lens, the fourth lens having positive optical power; the third lens and the fourth lens are cemented together to form a first cemented lens, the first cemented lens having positive optical power; and The fifth lens is a biconvex lens or a convex-plano lens with positive optical power.
3. The large aperture fixed focus lens according to claim 2, It is characterized in that The second lens group includes the following lenses arranged in order from the object side to the image side: a sixth lens having a positive refractive power; a seventh lens having a negative optical power; Aperture; an eighth lens having a positive optical power; a ninth lens, the ninth lens having a negative optical power; the eighth lens and the ninth lens are cemented together to form a second cemented lens, the second cemented lens having a negative optical power; a tenth lens having a negative optical power; an eleventh lens, the optical power of the eleventh lens is positive; the tenth lens and the eleventh lens are cemented to form a third cemented lens, the optical power of the third cemented lens is positive; and The twelfth lens has a positive optical power.
4. The large aperture fixed focus lens according to claim 3, It is characterized in that The third lens group includes the following lenses arranged in sequence from the object side to the image side: a thirteenth lens, the optical power of the thirteenth lens is negative; and The fourteenth lens has a positive refractive power.
5. The large aperture fixed focus lens according to claim 2, It is characterized in that The refractive index and Abbe number of the first lens satisfy the following conditional formula: 1.84≤nd1≤2.01; 17.9≤vd1≤40.9; Wherein, nd1 is the refractive index of the first lens, and vd1 is the Abbe number of the first lens.
6. The large aperture fixed focus lens according to claim 3, It is characterized in that The second lens is a glass aspherical lens; the twelfth lens is a glass aspherical lens.
7. The large aperture fixed focus lens according to claim 1, It is characterized in that The effective focal length of the first lens group and the effective focal length of the third lens group satisfy the following conditional formula: 0.8≤f1 / f3≤2.6; Wherein, f1 is the effective focal length of the first lens group; f3 is the effective focal length of the third lens group.
8. The large aperture fixed focus lens according to claim 1, It is characterized in that The effective focal length of the second lens group and the effective focal length of the lens satisfy the following conditional formula: 2.6≤f2 / f≤13; Among them, f2 is the effective focal length of the second lens group; f is the effective focal length of the lens.
9. The large aperture fixed focus lens according to claim 1, It is characterized in that The total optical length of the lens and the effective aperture of the largest lens element of the lens meet the following conditions: 2.75≤TTL / SD≤2.96; Among them, TTL is the total optical length of the lens, and SD is the effective aperture of the largest lens element.
10. The large aperture fixed focus lens according to any one of claims 1 to 9, It is characterized in that The field of view angle of the lens and the aperture of the lens satisfy the following conditions: 1.2≤Fno≤1.6; 74.6≥FOV≥102.8; Among them, FOV is the field of view of the lens, and Fno is the aperture of the lens.