Lens protection glass and optical system
By designing a spherical structure negative refractive lens protection mirror, the problem of mismatch between the existing protective mirror and the panoramic camera is solved, high-quality imaging is achieved, field of occlusion and reduced illumination, and lightweight and stable assembly is met Requirements.
Patent Information
- Application Number
- CN202323545483.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-25
AI Technical Summary
The existing protective mirror does not match the panoramic camera, resulting in reduced imaging resolution, image changes, field of view occlusion, reduced RI illuminance at edge field angles, heavier weight, unable to meet the lightweight requirements, and cannot match the panoramic camera base , causing parts assembly problems.
A lens protection lens is designed, the object and image surfaces are spherical structures, have negative refractive power, and gradually thickens in the middle toward the surroundings, and set into a crescent shape. The radius and core thickness of the protective mirror meet a specific relationship to ensure matching and optical performance with the panoramic camera.
By using this protective mirror, high imaging quality can be maintained, field occlusion can be avoided, RI illumination at edge field angles can be reduced, lightweight requirements can be met, and matched with the panoramic camera base to ensure a stable assembly.
Smart Images
Figure CN222439754U_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of panoramic camera lenses, and in particular to a lens protection lens and an optical system. Background Art
[0002] The existing protective glasses mainly have the following defects:
[0003] 1. The existing protective lens does not match the panoramic camera, which reduces the imaging resolution of the camera lens and causes the image to change shape, affecting actual use;
[0004] 2. The existing protective lens easily causes the FOV of the lens to be 190°, resulting in obstruction of the field of view;
[0005] 3. The existing protective lens easily causes the RI illumination of the edge field angle of the lens to decrease;
[0006] 4. The existing protective glasses are heavy and cannot meet the weight requirements;
[0007] 5. The existing protective lens cannot match the panoramic camera mount, causing parts assembly problems. Utility Model Content
[0008] The purpose of the utility model is to solve the above-mentioned problem and provide a lens protection mirror and an optical system.
[0009] The technical solution of the present disclosure is achieved as follows:
[0010] In a first aspect, the present disclosure provides a lens protective lens, the protective lens comprising an object surface and an image surface, the object surface and the image surface are both configured as spherical structures, and the object surface and the image surface are both convex surfaces facing the object side:
[0011] The middle part of the protective lens gradually becomes thicker towards the surroundings and is arranged in a crescent shape;
[0012] The protection lens has a negative refractive power.
[0013] As a further improvement of the above technical solution:
[0014] The radius and core thickness of the protective lens satisfy the following relationship:
[0015] 0≤R1-(R2+TC)<2.5;
[0016] Where R1 is the radius of curvature of the front surface of the protective lens, R2 is the radius of curvature of the front surface of the protective lens, and TC is the core thickness of the protective lens.
[0017] The advantages or beneficial effects of the above technical solution include at least:
[0018] 1. After adding the protective lens to the panoramic camera, the original imaging effect is less affected, and the imaging quality is kept as high as possible;
[0019] 2. After adding the protective lens, the 190° field of view of the lens FOV should not be blocked;
[0020] 3. After adding the protective lens, the RI of the lens edge field of view will affect the image and the illumination will be reduced less;
[0021] 4. Consider the material and size of the protective lens to meet the lightweight requirements;
[0022] 5. According to the panoramic camera base structure, the protective lens needs to be assembled and designed to ensure that the protective lens and the camera are fixed in position and will not fall off easily during use;
[0023] 6. The resolution is relatively good and can meet actual usage needs.
[0024] In a second aspect, the present disclosure further provides an optical system comprising any of the protective lenses described above;
[0025] The focal length, field of view, and imaging circle diameter of the optical system satisfy the following relationship:
[0026] 7 <FOV / (f*F*DY)<12;
[0027] Where FOV is the field of view of the optical system, f is the total focal length of the optical system, F is the F-Number value of the optical system, and DY is the imaging circle diameter of the optical system.
[0028] The advantages or beneficial effects of the above technical solution include at least:
[0029] The optical system of this embodiment has the same beneficial effects as the lens protection lens described above, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] The accompanying drawings illustrate exemplary embodiments of the present disclosure of embodiments of the utility model and, together with the description, are used to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure, and the accompanying drawings are included in and constitute a part of this specification.
[0031] Figure 1 The optical path principle diagram of the first embodiment of the utility model is shown;
[0032] Figure 2 The MTF curve diagram of the first embodiment of the present utility model is shown;
[0033] Figure 3 The field curvature distortion diagram of the optical system of the first embodiment of the utility model is shown;
[0034] Figure 4 The star point diagram of the first embodiment of the utility model is shown;
[0035] Figure 5 The illumination diagram of the first embodiment of the utility model is shown;
[0036] Figure 6 The optical path principle diagram of the second embodiment of the utility model is shown;
[0037] Figure 7 A schematic diagram of the MTF curve diagram of the second embodiment of the utility model is shown;
[0038] Figure 8 The field curvature distortion diagram of the optical system of the second embodiment of the utility model is shown;
[0039] Fig. 9 The star point diagram of the second embodiment of the utility model is shown;
[0040] Fig.10 The illumination diagram of the second embodiment of the utility model is shown;
[0041] Fig.11 The optical path principle diagram of the third embodiment of the utility model is shown;
[0042] Fig.12 The figure shows a schematic diagram of the MTF curve diagram of the third embodiment of the present utility model;
[0043] Fig.13 The field curvature distortion diagram of the optical system of the third embodiment of the utility model is shown;
[0044] Fig.14 The star point diagram of the third embodiment of the present utility model is shown;
[0045] Fig.15 The illumination diagram of the third embodiment of the present utility model is shown;
[0046] Fig.16 The optical path principle diagram of the fourth embodiment of the utility model is shown;
[0047] Fig.17 A schematic diagram of an MTF curve diagram of a fourth embodiment of the present utility model is shown;
[0048] Fig.18 The field curvature distortion diagram of the optical system of the fourth embodiment of the utility model is shown;
[0049] Fig.19 The star point diagram of the fourth embodiment of the utility model is shown;
[0050] Fig. 20 The illumination diagram of the fourth embodiment of the utility model is shown; DETAILED DESCRIPTION
[0051] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.
[0052] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in the present disclosure may be combined with each other. The present disclosure will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0053] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.
[0054] A lens protective lens, the protective lens comprises an object surface and an image surface, both of which are spherical structures, and both of which are convex surfaces facing the object side: the middle part of the protective lens gradually becomes thicker towards the surroundings and is arranged in a meniscus shape; the protective lens has a negative refractive power;
[0055] Specifically, the radius and core thickness of the protective mirror satisfy the following relationship:
[0056] 0≤R1-(R2+TC)<2.5;
[0057] Wherein, R1 is the radius of curvature of the front surface of the protective lens, R2 is the radius of curvature of the front surface of the protective lens, and TC is the core thickness of the protective lens;
[0058] In the four embodiments, the values of R1, R2 and TC are different, please refer to Table 1 for details.
[0059] Table 1:
[0060] parameter Example 1 Example 2 Example 3 Example 4 R1 15.4173 20.5701 14.65 14.4 R2 13.00 16.9398 13.15 12.9 TC 1.50 1.50 1.50 1.50 R2+TC 14.50 18.44 14.65 14.40 R1-R2-TC 0.92 2.13 0.00 0.00
[0061] The protective lens aperture satisfies the following relationship:
[0062] 1 <D1 / D2<1.25:
[0063] Wherein D1 is the outer diameter of the front surface of the protective mirror, and D2 is the outer diameter of the front surface of the protective mirror. In the four embodiments, the values of D1 and D2 are different. Please refer to Table 2 for details.
[0064] Table 2:
[0065] parameter Example 1 Example 2 Example 3 Example 4 D1 26.4 30.8 25.6 25.1 D2 22.3 26.8 22.6 22.1 D1 / D2 1.18 1.15 1.13 1.14
[0066] The focal length of the protective lens satisfies the following relationship:
[0067] -450mm <f1<-250mm;
[0068] Where f1 is the focal length of the protective lens;
[0069] In different embodiments, the value of f1 is different, please refer to Table 3 for details.
[0070] Table 3:
[0071] parameter Example 1 Example 2 Example 3 Example 4 f1 -200.58 -215.4 --376 -362.6
[0072] Platforms are provided on the right side and upper side of the protective mirror, and the platforms cooperate with the lens mount structural parts to stabilize the protective mirror.
[0073] Preferably, the protective mirror is made of H-K9L material, which is a colorless optical glass with a wide range of uses, including visible light and near-infrared optical devices.
[0074] The embodiment of the utility model also provides an optical system, comprising the above-mentioned protective mirror;
[0075] The focal length, field of view, and imaging circle diameter of the optical system satisfy the following relationship:
[0076] 7 <FOV / (f*F*DY)<12;
[0077] Where FOV is the field of view of the optical system, f is the total focal length of the optical system, F is the F-Number value of the optical system, and DY is the imaging circle diameter of the optical system.
[0078] In the four embodiments, the values of FOV, f, F and DY are different, please refer to Table 4 for details.
[0079] Table 4:
[0080]
[0081] Furthermore, the optical system also satisfies:
[0082] 12 <TTL / f<16;
[0083] Wherein, TTL is the distance from the front surface of the optical system protective mirror to the imaging surface, and f is the total focal length of the optical system. In the four embodiments, the values of TTL and f are different, and specific reference is made to Table 5.
[0084] Table 5:
[0085]
[0086] Furthermore, the optical system also satisfies the relationship that the distance from the front surface of the protective mirror to the front surface of the lens satisfies: 3 <ACB<4.1;
[0087] Wherein, ACB is the distance from the front surface of the protective mirror to the front surface of the lens. In the four embodiments, the values of TC and AC are different. Please refer to Table 6 for details.
[0088] Table 6:
[0089] parameter Example 1 Example 2 Example 3 Example 4 TC 1.50 1.50 1.50 1.50 AC 2.3 2.5 2.4 2.15 ACB=TC+AC 3.80 4.00 3.90 3.65
[0090] In summary, in Embodiment 1:
[0091] from Figure 2 It can be seen that the MTF of all fields of view of the optical system is greater than 0.3 at 156Lp / mm, and the area enclosed by the MTF curve and the horizontal and vertical coordinates is large. This shows that the resolution of the optical system is relatively good and can meet the actual use requirements.
[0092] from Figure 3 It can be seen that the field curvature of the optical system is within 0.05mm, and the maximum relative distortion of the optical system is 100%.
[0093] from Figure 4 It can be seen that the maximum star point diffusion radius is 3.685um.
[0094] from Figure 5 It can be seen that the relative illumination of the edge field of view is 97%, the optical system has little vignetting and uniform illumination.
[0095] As shown in Table 7:
[0096] Table 7:
[0097]
[0098] In the second embodiment:
[0099] from Figure 7 It can be seen that the MTF of all fields of view of the optical system is greater than 0.3 at 156Lp / mm, and the area enclosed by the MTF curve and the horizontal and vertical coordinates is large. This shows that the resolution of the optical system is relatively good and can meet the actual use requirements.
[0100] from Figure 8 It can be seen that the field curvature of the optical system is within 0.05mm, and the maximum relative distortion of the optical system is 100%.
[0101] from Fig. 9 It can be seen that the maximum star point diffuse spot radius is 3.193um
[0102] from Fig.10It can be seen that the relative illumination of the edge field of view is 98%, the optical system has little vignetting and uniform illumination.
[0103] As shown in Table 8
[0104] Table 8:
[0105]
[0106] In the third embodiment:
[0107] from Fig.12 It can be seen that the MTF of all fields of view of the optical system is greater than 0.3 at 156Lp / mm, and the area enclosed by the MTF curve and the horizontal and vertical coordinates is large. This shows that the resolution of the optical system is relatively good and can meet the actual use requirements.
[0108] from Fig.13 It can be seen that the field curvature of the optical system is within 0.05mm, and the maximum relative distortion of the optical system is 100%.
[0109] from Fig.14 It can be seen that the maximum star point diffusion radius is 3.85um.
[0110] from Fig.15 It can be seen that the relative illumination of the edge field of view is 95%, the optical system has little vignetting and uniform illumination.
[0111] As shown in Table 9:
[0112] Table 9:
[0113]
[0114] In the fourth embodiment:
[0115] from Fig.17 It can be seen that the MTF of all fields of view of the optical system is greater than 0.3 at 156Lp / mm, and the area enclosed by the MTF curve and the horizontal and vertical coordinates is large. This shows that the resolution of the optical system is relatively good and can meet the actual use requirements.
[0116] from Fig.18 It can be seen that the field curvature of the optical system is within 0.05mm, and the maximum relative distortion of the optical system is 100%.
[0117] from Fig.19 It can be seen that the maximum star point diffusion radius is 4.155um.
[0118] from Fig. 20 It can be seen that the relative illumination of the edge field of view is 85%, the optical system has little vignetting and uniform illumination.
[0119] As shown in Table 10:
[0120] Table 10:
[0121]
[0122] In the description of the present disclosure, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure 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 cannot be understood as a limitation on the present disclosure.
[0123] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made based on the above disclosure, and these changes or modifications are still within the scope of the present disclosure.
Claims
1. A lens protection lens, characterized in that: The protective mirror comprises an object surface and an image surface, both of which are configured as spherical structures, and both of which are convex surfaces facing the object side: The middle part of the protective lens gradually becomes thicker towards the surroundings and is arranged in a crescent shape; The protection lens has a negative refractive power.
2. The lens protection lens according to claim 1, characterized in that: The radius and core thickness of the protective lens satisfy the following relationship: 0≤R1-(R2+TC)<2.5; Where R1 is the radius of curvature of the front surface of the protective lens, R2 is the radius of curvature of the front surface of the protective lens, and TC is the core thickness of the protective lens.
3. The lens protection lens according to claim 1, characterized in that: The protective mirror aperture satisfies the following relationship: 1 <D1 / D2<1.25; Where D1 is the outer diameter of the front surface of the protective mirror, and D2 is the outer diameter of the front surface of the protective mirror.
4. The lens protection lens according to claim 1, characterized in that: The focal length of the protective lens satisfies the following relationship: -450mm <f1<-250mm; Where f1 is the focal length of the protective lens.
5. The lens protection lens according to claim 1, characterized in that: The right side and the upper side of the protective mirror are provided with a platform, and the platform is matched with the lens seat structure.
6. The lens protection lens according to claim 1, characterized in that: The protective lens is made of H-K9L material.
7. An optical system, characterized in that: A protective lens comprising any one of claims 1 to 6; The focal length, field of view, and imaging circle diameter of the optical system satisfy the following relationship: 7 <FOV / (f*F*DY)<12; Where FOV is the field of view of the optical system, f is the total focal length of the optical system, F is the F-Number value of the optical system, and DY is the imaging circle diameter of the optical system.
8. The optical system according to claim 7, characterized in that: The optical system also satisfies: 12 <TTL / f<16; Wherein, TTL is the distance from the front surface of the optical system protective mirror to the imaging surface, and f is the total focal length of the optical system.
9. The optical system according to claim 7, characterized in that: The optical system also satisfies that the distance from the front surface of the protective mirror to the front surface of the lens satisfies the relationship: 3 <ACB<4.1; Wherein, ACB is the distance from the front surface of the protective lens to the front surface of the lens.