Three-dimensional drawing equipment high-stability camera lens for 12MP sensor

Abstract

The utility model relates to a high-stability camera lens of three-dimensional drawing equipment for a 12MP sensor. A first lens, a second lens, a third lens, a fourth lens, a diaphragm aperture surface, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens are sequentially arranged from an object space to an image plane of the lens. The eighth lens is an optical filter, the ninth lens is a protective glass sheet, and the outside of the image plane of the protective glass sheet is an imaging plane; image surfaces and object surfaces of all the lenses are lenses plated with BBAR films; therefore, reflected light is reduced, and stray light generated in the lens is absorbed and dispersed to a great extent. A clamping ring is arranged between part of the lenses, a sealing ring is arranged between the lens cap and the lens barrel, and the high-strength optical lens is light in weight and high in strength. And the distortion of the lens is small, so that the most real picture can be effectively shot. In the optical design process, the increase of the number of lenses, the adjustment of arrangement and the optimization of shapes and materials are comprehensively considered, and a full-glass lens is used, so that the stability of the lens is ensured.

Description

Technical Field

[0001] The utility model relates to a lens, in particular to a high-stability camera lens for three-dimensional drawing equipment of a 12MP sensor, which has a simple structure, high imaging quality and can effectively take the most realistic photos. Background Art

[0002] With the development of computer visualization technology and the maturity of 2D mapping, people began to pay attention to it in the early 1990s. In the traditional field of mapping, information is mainly presented to users in the form of two-dimensional plane maps. This form inherits the characteristics of ordinary two-dimensional map display, has low hardware requirements for mobile devices, and has a small amount of data transmission, but its intuitiveness is poor. The presentation of information is in direct contact with the end user, which is the most intuitive reflection of service quality and effect. Therefore, the presentation of surveying and mapping data also directly affects the applicability of surveying and mapping to users. After entering the 1990s, the rapid development of three-dimensional visualization and virtual reality technology made it possible to establish 3D mapping.

[0003] The development prospects of 3D mapping technology are very broad. First of all, in urban planning, 3D mapping technology can be combined with intelligent systems to provide more intelligent decision-making support for urban planners. In the field of transportation, 3D mapping technology can provide accurate navigation and path planning by building accurate digital maps. With the maturity of drone technology, 3D mapping technology can provide support for more fields by conducting faster and more efficient mapping through drones. For example, it can be used for monitoring and early warning of natural disasters, timely discovering and responding to potential disaster risks. In terms of cultural heritage protection, 3D mapping technology can help to accurately digitize cultural relics, so that future generations can better understand and study our cultural heritage.

[0004] Disadvantages of traditional technology: 1. Lenses manufactured with traditional technology rely on the contrast of the object being measured and cannot highlight the features of objects with the same color as the background; 2. Lenses manufactured with traditional technology have poor reliability and cannot be used in all-weather or harsh environments; 3. Lenses manufactured with traditional technology have a simple structure and a short service life.

[0005] The reasons for the above shortcomings are:

[0006] 1. The camera lens is composed of multiple lenses, which are made of glass or plastic. If no special treatment is performed, the lens surface will reflect about 5% of the incident light. When strong light enters the lens, multiple reflections will occur in each lens and inside the camera, and on the surface of metal components, so the phenomenon we see in actual shooting is ghosting.

[0007] 2. Making a lens with a large aperture is restricted by many factors. The larger the aperture, the more complex the lens required for clear imaging. Each lens structure has its limit aperture. The larger the aperture, the more complex the structure. The complex structure will bring many negative effects. The biggest impacts are: ① Increased product cost ② Very high assembly precision requirements.

[0008] 3. Plastic lenses have poor environmental durability and imaging stability, and image quality will deteriorate if used for a long time in harsh environments. Utility Model Content

[0009] In view of the above problems, the main purpose of the utility model is to provide a high-stability camera lens for three-dimensional mapping equipment with a 12MP sensor, which has a simple structure, high imaging quality and can effectively take the most realistic photos.

[0010] The utility model solves the above technical problems through the following technical solutions: a high-stability camera lens for a three-dimensional drawing device of a 12MP sensor, the high-stability camera lens for a three-dimensional drawing device of a 12MP sensor comprising: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a lens barrel, a lens cap, and an aperture surface, and from the object space of the lens to the image surface, they are: the first lens, the second lens, the third lens, the fourth lens, the aperture surface, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens; the eighth lens is a filter, the ninth lens is a protective glass sheet, and the outside of the image surface of the protective glass sheet is the imaging surface.

[0011] The second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all fixedly installed in the lens barrel, the protective glass sheet is fixedly installed on the outer shell, a part of the first lens is stuck in the lens cap, and the other part is stuck in the lens barrel.

[0012] A first clamping ring is arranged between the first lens and the second lens, a second clamping ring is arranged between the second lens and the third lens, a third clamping ring is arranged between the third lens and the fourth lens, a fourth clamping ring is arranged between the fourth lens and the fifth lens, a fifth clamping ring is arranged between the sixth lens and the seventh lens, a lens barrel protrusion is arranged on the lens barrel between the seventh lens and the eighth lens, the seventh lens is clamped between the fifth clamping ring and the lens barrel protrusion, a first sealing ring is arranged between the first lens and the lens, a second sealing ring is arranged between the lens cap and the lens barrel, a lens cap barb is arranged on the lens cap, and a step matching the lens cap barb is arranged on the first lens.

[0013] The third clamping ring is provided with a first protrusion of the third clamping ring for clamping the third lens, and a second protrusion of the third clamping ring for clamping the fourth lens; the third lens is provided with a first step of the third lens and a second step of the third lens for installing and clamping the second clamping ring and the third clamping ring; the fourth lens is provided with a fourth lens step for clamping the third clamping ring; the fourth clamping ring is a clamping ring with a variable diameter, which clamps the fourth lens and the fifth lens in the lens barrel.

[0014] In a specific implementation example of the present invention, the object surface of the first lens is a spherical surface with a curvature radius of 22.751 mm, and the center thickness of the first lens is 1.55 mm; the image surface of the first lens is a spherical surface with a curvature radius of 8.428 mm, and the distance between the image surface of the first lens and the center vertex of the object surface of the second lens is 4.85 mm.

[0015] In a specific implementation example of the present invention, the object surface of the second lens is a spherical surface with a curvature radius of 25.224 mm, and the center thickness of the second lens is 1.7 mm; the image surface of the second lens is a spherical surface with a curvature radius of 5.085 mm, and the distance between the image surface of the second lens and the central vertex of the object surface of the third lens is 5.626 mm.

[0016] In a specific implementation example of the present utility model, the object surface of the third lens is a spherical surface with a curvature radius of -7.031 mm, and the center thickness of the third lens is 5.880 mm; the image surface of the third lens is a spherical surface with a curvature radius of -10.706 mm, and the image surface of the third lens is 0.1 mm away from the center vertex of the object surface of the fourth lens.

[0017] In a specific implementation example of the present utility model, the object surface of the fourth lens is a spherical surface with a radius of curvature of 11.698 mm, and the center thickness of the fourth lens is 5.12 mm; the image surface of the fourth lens is a plane, the distance between the image surface of the fourth lens and the aperture surface is 3.8 mm, and the distance between the aperture surface and the center vertex of the object surface of the fifth lens is 0.407 mm.

[0018] In a specific implementation example of the present utility model, the object surface of the fifth lens is a spherical surface with a curvature radius of 6.121 mm, and the center thickness of the fifth lens is 2.52 mm; the image surface of the fifth lens is a spherical surface with a curvature radius of -4.385 mm, and the distance between the image surface of the fifth lens and the central vertex of the object surface of the sixth lens is 0.

[0019] In a specific implementation example of the present utility model, the object surface of the sixth lens is a spherical surface with a curvature radius of -4.385 mm, and the center thickness of the sixth lens is 0.45 mm; the image surface of the sixth lens is a spherical surface with a curvature radius of 8.639 mm, and the distance between the image surface of the sixth lens and the central vertex of the object surface of the seventh lens is 0.978 mm.

[0020] In a specific implementation example of the present utility model, the object surface of the seventh lens is an aspherical surface with a curvature radius of 9.654 mm, and the center thickness of the seventh lens is 2.3 mm; the image surface of the seventh lens is an aspherical surface with a curvature radius of -7.625 mm, and the distance between the image surface of the seventh lens and the central vertex of the object surface of the eighth lens is 0.1 mm.

[0021] In a specific implementation example of the present utility model, the object plane and image plane of the eighth lens and the ninth lens are both planes, the center thickness of the eighth lens is 0.5000mm, the center thickness of the ninth lens is 0.500mm, and the distance between the image plane of the eighth lens and the object plane of the ninth lens is 0.42mm.

[0022] In a specific implementation example of the present invention, the image surfaces and object surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are lenses coated with BBAR film.

[0023] The positive improvement effect of the utility model is that the high stability camera lens for 3D mapping equipment with 12MP sensor provided by the utility model has the following advantages:

[0024] The lens barrel of the utility model is made of aluminum AL6061, which improves the structural strength of the lens, and the surface is oxidized and blackened, which can effectively absorb the reflection of stray light.

[0025] The lens surface of the utility model is coated with a BBAR film to reduce reflected light, absorb and disperse the stray light generated inside the lens to a great extent, and greatly reduce the stray light energy on the image plane.

[0026] The lens of the utility model has small distortion and can effectively take the most realistic photos.

[0027] During the optical design process, the utility model comprehensively considers increasing the number of lenses, adjusting the arrangement, optimizing the shape and material, and using a full glass lens to ensure the stability of the lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0029] Figure 2 This is a schematic diagram of the imaging light path of the utility model.

[0030] The following are the names corresponding to the label numbers in this utility model:

[0031] First lens 1, second lens 2, third lens 3, fourth lens 4, fifth lens 5, sixth lens 6, seventh lens 7, eighth lens 8, ninth lens 9, lens barrel 10, first clamping ring 11, second clamping ring 12, third clamping ring 13, fourth clamping ring 14, fifth clamping ring 15, first sealing ring 16, lens cap 17, lens cap barb 18, step 19, second sealing ring 20, aperture aperture surface 21;

[0032] The lens barrel protrusion 101 , the third lens first step 301 , the third lens second step 302 , the fourth lens step 401 , the third clamping ring first protrusion 131 , and the third clamping ring second protrusion 132 . DETAILED DESCRIPTION

[0033] The preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solution of the present invention in detail.

[0034] Figure 1 It is a schematic diagram of the overall structure of the utility model. Figure 2 Schematic diagram of the imaging optical path of the utility model, such as Figure 1 and 2 As shown, the utility model provides a high-stability camera lens for a three-dimensional drawing device with a 12MP sensor, and the high-stability camera lens for a three-dimensional drawing device with a 12MP sensor comprises: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a lens barrel 10, a lens cap 17, and an aperture surface 21. From the object space of the lens to the image plane, they are: a first lens, a second lens, a third lens, a fourth lens 4, an aperture surface 21, a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, and a ninth lens 9; the eighth lens 8 is a filter, and the ninth lens 9 is a protective glass sheet, and the outside of the image surface of the protective glass sheet is the imaging surface.

[0035] The second lens 2 , the third lens 3 , the fourth lens 4 , the fifth lens 5 , the sixth lens 6 , the seventh lens 7 and the eighth lens 8 are all fixedly mounted in the lens barrel 10 , the protective glass sheet is fixedly mounted on the outer shell, a part of the first lens 1 is stuck in the lens cap 17 , and the other part is stuck in the lens barrel 10 .

[0036] A first clamping ring 11 is arranged between the first lens 1 and the second lens 2, a second clamping ring 12 is arranged between the second lens 2 and the third lens 3, a third clamping ring 13 is arranged between the third lens 3 and the fourth lens 4, a fourth clamping ring 14 is arranged between the fourth lens 4 and the fifth lens 5, a fifth clamping ring 15 is arranged between the sixth lens 6 and the seventh lens 7, a lens barrel protrusion 101 is arranged on the lens barrel 10 between the seventh lens 7 and the eighth lens 8, the seventh lens 7 is clamped between the fifth clamping ring 15 and the lens barrel protrusion 101, a first sealing ring 16 is arranged between the first lens 1 and the lens barrel 8, a second sealing ring 20 is arranged between the lens cap 17 and the lens barrel 10, a lens cap barb 18 is arranged on the lens cap 17, and a step 19 matching the lens cap barb 18 is arranged on the first lens 1.

[0037] The third clamping ring 13 is provided with a third clamping ring first protrusion 131 for clamping the third lens 3, and a third clamping ring second protrusion 132 for clamping the fourth lens 4; the third lens 3 is provided with a third lens first step 301 and a third lens second step 302 for installing and clamping the second clamping ring 12 and the third clamping ring 13; the fourth lens 4 is provided with a fourth lens step 401 for clamping the third clamping ring 13; the fourth clamping ring 14 is a clamping ring with a variable diameter, which clamps the fourth lens 4 and the fifth lens 5 in the lens barrel 10.

[0038] In the specific implementation process of the present invention, the image surface and the object surface of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the eighth lens 8, and the ninth lens 9 are lenses coated with BBAR film.

[0039] The following is a specific implementation example: in the following text description and table, lens 1 is the first lens, lens 2 is the second lens, lens 3 is the third lens, lens 4 is the fourth lens, lens 5 is the fifth lens, lens 6 is the sixth lens 6, lens 7 is the seventh lens 7, lens 8 is the eighth lens 8, and lens 9 is the ninth lens 9.

[0040] Table 1 lists the detailed parameters of the design. The first row lists the main parameters of the lens: focal length f = 2.14 mm, aperture F / # = 2.0, and total optical track length TTL = 40.000 mm.

[0041] The headings of Table 1 list: "Surface", "Type", "Radius of Curvature", "Thickness", "Refractive Index" and "Abbe Number". The lens element material is defined by the refractive index and the Abbe number. In Table 1, a blank cell in the "Refractive Index" column indicates that the value in the adjacent "Thickness" cell is the distance to the next lens surface vertex. The "Refractive Index" column provides the refractive index of the lens material at a wavelength of 632.8nm.

[0042] In Table 1, the radius of curvature of the object surface is infinite, that is, a plane, and is infinitely far from the center vertex of the next surface (object surface of lens 1).

[0043] Surface 1 is the object surface of lens 1, which is a spherical surface with a radius of curvature of 22.751 mm. It is 1.55 mm away from the central vertex of the next surface (image surface of lens 1), that is, the central thickness of lens 1 is 1.55 mm, the refractive index is 1.772501, and the Abbe coefficient is 46.613485.

[0044] Surface 2 is the image surface of lens 1, which is a spherical surface with a radius of curvature of 8.428 mm and a distance of 4.85 mm from the next surface (object surface of lens 2).

[0045] Surface 3 is the object surface of lens 2, which is a spherical surface with a curvature radius of 25.224 mm. It is 1.7 mm away from the central vertex of the next surface (image surface of lens 2), that is, the central thickness of lens 2 is 1.7 mm, the refractive index is 1.804009, and the Abbe coefficient is 46.567682.

[0046] Surface 4 is the image surface of lens 2, which is a spherical surface with a curvature radius of 5.085 mm and a distance of 5.626 mm from the next surface (object surface of lens 3).

[0047] Surface 5 is the object surface of lens 3, which is a spherical surface with a curvature radius of -7.031 mm. The center vertex of this surface is 5.880 mm away from the center vertex of the next surface (image surface of lens 3), that is, the center thickness of lens 3 is 5.880 mm, the refractive index is 1.910820, and the Abbe coefficient is 35.282389.

[0048] Surface 6 is the image surface of lens 3, which is a spherical surface with a radius of curvature of -10.706 mm and a distance of 0.1 mm from the next surface (object surface of lens 4).

[0049] Surface 7 is the object surface of lens 4, which is a spherical surface with a curvature radius of 11.698 mm. The center vertex of this surface is 5.12 mm away from the center vertex of the next surface (image surface of lens 4), that is, the center thickness of lens 4 is 5.12 mm, the refractive index is 1.834810, and the Abbe coefficient is 33.286897.

[0050] Surface 8 is the image surface of lens 4, which is a plane with an infinite radius of curvature and is 3.8 mm away from the next surface (aperture surface).

[0051] Surface 9 is the aperture surface, which is a virtual surface with an infinitesimal thickness and a distance of 0.407 mm from the center vertex of the next lens surface (object surface of lens 5).

[0052] Surface 10 is the object surface of lens 5, which is a spherical surface with a curvature radius of 6.121 mm. The center vertex of this surface is 2.52 mm away from the center vertex of the next surface (the image surface of lens 5 or the object surface of lens 6), that is, the center thickness of lens 5 is 2.52 mm, the refractive index is 1.592807, and the Abbe coefficient is 68.525033.

[0053] Surface 11 is the image plane of lens 5. Since the distance between this surface and the object plane of lens 6 is 0 and the surface curvature radius is the same, surface 11 is both the image plane of lens 5 and the object plane of lens 6. This surface is a spherical surface with a curvature radius of -4.385mm, a distance of 0.45mm from the next surface (image plane of lens 6), and a center thickness of lens 6 of 0.45mm, a refractive index of 1.761823, and an Abbe series of 26.613203.

[0054] Surface 12 is the image surface of lens 6, which is a spherical surface with a radius of curvature of 8.639 mm and a distance of 0.978 mm from the central vertex of the next surface (object surface of lens 7).

[0055] Surface 13 is the object surface of lens 7; this surface is aspherical, with a radius of curvature of 9.654 mm, and is 2.3 mm away from the central vertex of the next surface (image surface of lens 7); that is, the central thickness of lens 7 is 2.3 mm, the refractive index is 1.693847, and the Abbe coefficient is 53.151009.

[0056] Surface 14 is the image surface of lens 7; this surface is aspherical, with a radius of curvature of -7.625 mm, and is 0.1 mm away from the central vertex of the next surface (filter object surface).

[0057] Surface 15 is the object surface of the filter (lens 8), which is a plane with an infinite radius of curvature and is 0.500 mm away from the next surface (filter image surface), that is, the filter thickness is 0.5000 mm, the refractive index is 1.516797, and the Abbe coefficient is 64.2124.

[0058] Surface 16 is the image surface of the filter, which is a plane with an infinite radius of curvature and is 0.42 mm away from the next surface (the chip protection glass object surface).

[0059] Surface 17 is the object surface of the chip protection glass (lens 9), which is a plane with an infinite radius of curvature and is 0.500 mm away from the next surface (the image surface of the chip protection glass), that is, the chip protection glass is 0.500 mm thick, has a refractive index of 1.516797, and an Abbe coefficient of 64.2124.

[0060] Surface 18 is the chip protection glass image plane, which is a plane with an infinite radius of curvature and is 0.42 mm away from the next surface (image plane).

[0061] Surface 19 is the lens imaging surface.

[0062]

[0063]

[0064] The resolution of this optical design is measured using the E2 machine:

[0065] Line pair: 120lp / mm

[0066] Center MTF ≥ 55

[0067] φ5.5MTF≥30

[0068] Center focus, no AA, add 0.5mm window

[0069] The design features of the lens proposed in the utility model are as follows:

[0070] 1. The lens barrel of the utility model is made of aluminum AL6061, which improves the structural strength of the lens, and the surface is oxidized and blackened, which can effectively absorb the reflection of stray light.

[0071] 2. The utility model has high environmental adaptability: it can pass the reliability test for vehicle use, and the protection level reaches IP65.

[0072] 3. The lens surface of the utility model is coated with BBAR film to reduce reflected light, which absorbs and disperses the stray light generated inside the lens to a great extent, thereby greatly reducing the stray light energy on the image plane.

[0073] 4. The lens of the utility model has little distortion and can effectively take the most realistic photos.

[0074] 5. The utility model has a large aperture, which can increase the amount of light passing through, reduce the depth of field, make the picture brighter, and have a greater relative brightness, which is conducive to night scene shooting.

[0075] 6. The utility model has good temperature resistance: it can work at a temperature of -40 to +125°C.

[0076] 7. During the optical design process, the utility model comprehensively considers increasing the number of lenses, adjusting the arrangement, optimizing the shape and material, and using a full glass lens to ensure the stability of the lens.

[0077] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A high stability camera lens for 3D mapping devices with 12MP sensors, characterized by: The high-stability camera lens for a 3D mapping device with a 12MP sensor comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a lens barrel, a lens cap, and an aperture surface, and from the object space to the image surface of the lens, they are: the first lens, the second lens, the third lens, the fourth lens, the aperture surface, the fifth lens, the sixth lens, the seventh lens, the eighth lens, and the ninth lens; the eighth lens is a filter, the ninth lens is a protective glass sheet, and the outside of the image surface of the protective glass sheet is an imaging surface; The second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens are all fixedly mounted in the lens barrel, the protective glass sheet is fixedly mounted on the housing, a part of the first lens is stuck in the lens cap, and another part is stuck in the lens barrel; A first clamping ring is provided between the first lens and the second lens, a second clamping ring is provided between the second lens and the third lens, a third clamping ring is provided between the third lens and the fourth lens, a fourth clamping ring is provided between the fourth lens and the fifth lens, a fifth clamping ring is provided between the sixth lens and the seventh lens, a lens barrel protrusion is provided on the lens barrel between the seventh lens and the eighth lens, the seventh lens is clamped between the fifth clamping ring and the lens barrel protrusion, a first sealing ring is provided between the first lens and the lens, a second sealing ring is provided between the lens cap and the lens barrel, a lens cap barb is provided on the lens cap, and a step matching with the lens cap barb is provided on the first lens; The third clamping ring is provided with a first protrusion of the third clamping ring for clamping the third lens, and a second protrusion of the third clamping ring for clamping the fourth lens; the third lens is provided with a first step of the third lens and a second step of the third lens for installing and clamping the second clamping ring and the third clamping ring; the fourth lens is provided with a fourth lens step for clamping the third clamping ring; the fourth clamping ring is a clamping ring with a variable diameter, which clamps the fourth lens and the fifth lens in the lens barrel.

2. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the first lens is a spherical surface with a curvature radius of 22.751 mm, and the center thickness of the first lens is 1.55 mm; the image surface of the first lens is a spherical surface with a curvature radius of 8.428 mm, and the distance between the image surface of the first lens and the center vertex of the object surface of the second lens is 4.85 mm.

3. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the second lens is a spherical surface with a curvature radius of 25.224 mm, and the center thickness of the second lens is 1.7 mm; the image surface of the second lens is a spherical surface with a curvature radius of 5.085 mm, and the distance between the image surface of the second lens and the center vertex of the object surface of the third lens is 5.626 mm.

4. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the third lens is a spherical surface with a curvature radius of -7.031 mm, and the center thickness of the third lens is 5.880 mm; the image surface of the third lens is a spherical surface with a curvature radius of -10.706 mm, and the image surface of the third lens is 0.1 mm away from the center vertex of the object surface of the fourth lens.

5. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the fourth lens is a spherical surface with a curvature radius of 11.698 mm, and the center thickness of the fourth lens is 5.12 mm; the image surface of the fourth lens is a plane, the distance between the image surface of the fourth lens and the aperture surface is 3.8 mm, and the distance between the aperture surface and the center vertex of the object surface of the fifth lens is 0.407 mm.

6. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the fifth lens is a spherical surface with a curvature radius of 6.121 mm, and the center thickness of the fifth lens is 2.52 mm; the image surface of the fifth lens is a spherical surface with a curvature radius of -4.385 mm, and the distance between the image surface of the fifth lens and the center vertex of the object surface of the sixth lens is 0.

7. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the sixth lens is a spherical surface with a curvature radius of -4.385 mm, and the center thickness of the sixth lens is 0.45 mm; the image surface of the sixth lens is a spherical surface with a curvature radius of 8.639 mm, and the distance between the image surface of the sixth lens and the central vertex of the object surface of the seventh lens is 0.978 mm.

8. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object surface of the seventh lens is aspherical, with a curvature radius of 9.654 mm, and the center thickness of the seventh lens is 2.3 mm; the image surface of the seventh lens is aspherical, with a curvature radius of -7.625 mm, and the distance between the image surface of the seventh lens and the central vertex of the object surface of the eighth lens is 0.1 mm.

9. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The object plane and image plane of the eighth lens and the ninth lens are both planes, the center thickness of the eighth lens is 0.5000 mm, the center thickness of the ninth lens is 0.500 mm, and the distance between the image plane of the eighth lens and the object plane of the ninth lens is 0.42 mm.

10. The high stability camera lens for 3D mapping devices for 12MP sensors according to claim 1, characterized in that: The image surfaces and object surfaces of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the eighth lens and the ninth lens are lenses coated with BBAR film.

Images