CN218481691U - Lens of single-board computer - Google Patents

Abstract

The utility model discloses a veneer computer camera lens, including the plastics picture frame, install optical assembly in the picture frame, with picture frame integrated into one piece's lens mount, the lens mount is located the rear end of picture frame, optical assembly includes first lens, second lens, third lens, fourth lens, fifth lens, the sixth lens that set gradually along an optical axis in the past to the back, first lens is glass spherical lens, second lens, third lens, fifth lens, sixth lens are plastics aspherical lens, the fourth lens is glass aspherical lens. The utility model discloses single board computer camera lens simple structure, reasonable in design, plastics picture frame and lens mount adopt the integral type design, effectively guarantee the camera lens image quality, and the antidetonation is effectual simultaneously; optical assembly adopts 2G 4P's design, and the camera lens external diameter is less than 13mm, and weight is less than 2G, and the whole small of camera lens, light in weight are particularly useful for the higher scene of requirement to camera lens external diameter weight such as unmanned aerial vehicle.

Description

A single-board computer lens

technical field

The utility model relates to the technical field of optical lenses, in particular to a single-board computer lens.

Background technique

With the continuous advancement of science and technology and the continuous development of society, optical imaging lenses have also developed rapidly in recent years. Most of the existing single-board computer lenses use threaded interfaces to be fixed with the lens mount, but there is a gap in the thread fit, the lens and the lens mount are prone to tilt during installation, and there is also the problem of difficult torque fit, which will eventually affect the imaging of the lens quality; in addition, the existing single-board computer lenses are bulky and heavy, and their application scenarios are limited. At the same time, most of them are all-glass designs, and the cost is relatively high.

In view of this, the inventor of the present application invented a single-board computer lens.

Utility model content

The purpose of the utility model is to provide a single-board camera lens with simple structure, reasonable design, small volume, light weight and good anti-seismic effect.

In order to achieve the above purpose, the utility model adopts the following technical solutions: a single-board computer lens, including a plastic frame, an optical component installed in the frame, and a lens mount integrally formed with the frame, and the lens mount is located at the rear of the frame At the end, the optical assembly includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially along an optical axis from front to back, and the first lens is a glass spherical lens , the second lens, the third lens, the fifth lens, and the sixth lens are all plastic aspheric lenses, and the fourth lens is a glass aspheric lens.

Further, each of the first lens to the sixth lens includes an object side facing the front side and allowing the imaging light to pass through, and an image side facing the rear side and allowing the imaging light to pass through;

The first lens has a negative diopter, and the object side of the first lens is convex, and the image side is concave;

The second lens has a negative diopter, and the object side of the second lens is concave, and the image side is concave;

The third lens has a positive diopter, and the object side of the third lens is concave, and the image side is convex;

The fourth lens has a positive diopter, and the object side of the fourth lens is convex, and the image side is convex;

The fifth lens has positive diopter, and the object side of the fifth lens is convex, and the image side is convex;

The sixth lens has negative diopter, and the object side of the sixth lens is concave, and the image side is concave.

Further, the image side of the fifth lens and the object side of the sixth lens are cemented together.

Further, the inner diameter of the spectacle frame gradually decreases from front to back, and the optical component is fixed to the inner wall of the spectacle frame by dispensing glue.

Further, a first spacer is provided between the third lens and the fourth lens, and a second spacer is provided between the fourth lens and the fifth lens.

Further, both sides of the mirror frame are provided with an extension extending outward, and fixing holes are provided on the extension.

Further, the outer diameter of the lens is less than 13mm.

After adopting the above technical solution, the utility model has the following advantages compared with the prior art:

The single-board computer lens of the utility model has a simple structure and a reasonable design. The plastic frame and the lens seat adopt an integrated design, and at the same time, the extension part is fixed with the camera shell, which can effectively prevent the threaded connection between the frame and the lens seat from affecting the imaging quality, and at the same time, the anti-seismic effect is good; The optical component adopts 2G4P design, and is fixed with the frame by dispensing glue. The outer diameter of the lens is less than 13mm, and the weight is less than 2g.

Description of drawings

Fig. 1 is the three-dimensional view of the single-board computer lens of the embodiment of the present invention;

Fig. 2 is a schematic diagram of the lens optical assembly of the single-board computer according to the embodiment of the present invention;

Fig. 3 is a cross-sectional view of the lens of the single-board computer according to the embodiment of the present invention.

Explanation of reference signs:

11. Frame; 12. Lens holder; 13. Extension;

21. First lens; 22. Second lens; 23. Third lens; 24. Fourth lens; 25. Fifth lens; 26. Sixth lens; 27. First spacer; 28. Second spacer.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Here, "a lens has a positive refractive power (or negative refractive power)" means that the paraxial refractive power of the lens calculated by Gaussian optical theory is positive (or negative). The so-called "object side (or image side) of the lens" is defined as a specific range where imaging light passes through the lens surface. The concave-convex of the lens surface can be judged according to the judgment method of ordinary knowledge in the field, that is, the concave-convex of the lens surface can be judged by the sign of the radius of curvature (abbreviated as R value). R-values are commonly used in optical design software such as Zemax or CodeV. The R value is also commonly found in the lens data sheet of the optical design software. For the side of the object, when the R value is positive, it is judged that the side of the object is convex; when the value of R is negative, it is judged that the side of the object is concave. Conversely, in terms of the image side, when the R value is positive, it is judged that the image side is concave; when the R value is negative, it is judged that the image side is convex.

The utility model discloses a lens for a single-board computer, which is mainly used in the fields of obstacle avoidance and image acquisition of unmanned aerial vehicles. The lens includes a plastic frame 11, an optical assembly installed in the frame 11, and a lens mount 12 integrally formed with the frame 11, the lens mount 12 is located at the rear end of the frame 11, and the optical assembly includes Object side to image side) first lens 21, second lens 22, third lens 23, fourth lens 24, fifth lens 25, sixth lens 26 arranged in sequence along an optical axis, the first lens 21 is As for the glass spherical lens, the second lens 22 , the third lens 23 , the fifth lens 25 and the sixth lens 26 are all plastic aspheric lenses, and the fourth lens 24 is a glass aspheric lens.

The lens adopts 2G4P structure, compared with the existing all-glass design, its weight is greatly reduced, and the cost is also controlled; it adopts the design of plastic frame 11, and after the structure is optimized, the wall thickness is uniform and the strength is sufficient. The wall thickness of the frame 11 is reduced, which is different from the traditional single-focus metal frame 11, which greatly reduces the weight of the product; the lens mount 12 (installed with sensors, etc.) and the frame 11 adopt an integrated design to avoid the problem of poor torque fit. The coaxiality between the seat 12 and the lens is effectively guaranteed, which effectively guarantees the imaging quality of the lens, and can reduce the process time and labor cost.

Specifically, each of the first lens 21 to the sixth lens 26 includes an object side facing the front side (object side) and allowing the imaging light to pass through, and an image side facing the rear side (image side) and allowing the imaging light to pass through;

The first lens 21 has a negative diopter, and the object side of the first lens 21 is convex, and the image side is concave;

The second lens 22 has a negative diopter, and the object side of the second lens 22 is concave, and the image side is concave;

The third lens 23 has a positive diopter, and the object side of the third lens 23 is concave, and the image side is convex;

The fourth lens 24 has a positive diopter, and the object side of the fourth lens 24 is convex, and the image side is convex;

The fifth lens 25 has a positive diopter, and the object side of the fifth lens 25 is convex, and the image side is convex;

The sixth lens 26 has a negative diopter, and the object side of the sixth lens 26 is concave, and the image side is concave.

Wherein, the image side of the fifth lens 25 and the object side of the sixth lens 26 are glued to each other, so as to achieve low distortion and large light transmission under the premise of maintaining a large field of view of the lens. Specifically, the field of view of the lens is 200°, and the shooting range is large; on the basis of maintaining a large field of view, the lens has small distortion, which is less than 4.1%, and can effectively restore the actual shape of the object; the lens has a large light transmission, F/ NO=1.8, the image is clear even in low light.

The inner diameter of the mirror frame 11 gradually decreases from the front to the rear, and the optical component is glued to the inner wall of the mirror frame 11 to fix it. Wherein, the inner wall of the picture frame 11 gradually decreases in steps from front to back, and when installing the optical components in the picture frame 11, they are installed sequentially from the rear end of the picture frame 11 to the front end.

Wherein, a first spacer 27 is provided between the third lens 23 and the fourth lens 24 , and a second spacer 28 is provided between the fourth lens 24 and the fifth lens 25 . The lens is fixed by glue dispensing of optical components, and most of the lenses are directly supported. There are only two spacers (the first spacer 27 and the second spacer 28), and the pressure ring design is cancelled, which can effectively reduce the number of parts. Improve the assembly efficiency, reduce the weight of the lens, and also greatly reduce the cost.

Both sides of the mirror frame 11 are provided with an extension portion 13 extending outward, and the extension portion 13 is provided with a fixing hole. Through the fixing hole on the extension part 13, the lens can be directly fixed on the camera housing, which effectively solves the problem of shaking or even blurring of the image caused by vibration.

The outer diameter (diameter) of the lens is less than 13mm, and the weight is less than 2g. The overall volume is small and the weight is light. It is especially suitable for scenes such as drones that require a high lens outer diameter and weight.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (7)

1. A single board computer camera lens which characterized in that: including the plastics picture frame, install optical assembly in the picture frame, with picture frame integrated into one piece's lens mount, the lens mount is located the rear end of picture frame, optical assembly includes first lens, second lens, third lens, fourth lens, fifth lens, the sixth lens that set gradually along an optical axis in the past to the back, first lens is glass spherical lens, second lens, third lens, fifth lens, sixth lens are plastics aspherical lens, fourth lens is glass aspherical lens.

2. A single board camera lens as claimed in claim 1, wherein: the first lens to the sixth lens respectively comprise an object side surface facing to the front side and allowing the imaging light to pass through and an image side surface facing to the rear side and allowing the imaging light to pass through;

the first lens has negative diopter, and the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;

the second lens has negative diopter, the object side surface of the second lens is a concave surface, and the image side surface of the second lens is a concave surface;

the third lens has positive diopter, the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface;

the fourth lens has positive diopter, and the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;

the fifth lens has positive diopter, and the object side surface of the fifth lens is a convex surface, and the image side surface of the fifth lens is a convex surface;

the sixth lens has negative diopter, and the object side surface of the sixth lens is a concave surface, and the image side surface of the sixth lens is a concave surface.

3. A single board lens as claimed in claim 2, wherein: and the image side surface of the fifth lens and the object side surface of the sixth lens are mutually glued.

4. A single board camera lens as claimed in claim 1, wherein: the internal diameter of picture frame reduces gradually from the past to the back, optical component and picture frame inner wall point are glued fixedly.

5. The single board camera lens of claim 1 or 4, wherein: a first space ring is arranged between the third lens and the fourth lens, and a second space ring is arranged between the fourth lens and the fifth lens.

6. A single board camera lens as claimed in claim 1, wherein: both sides of the mirror frame extend outwards to form an extending part, and the extending part is provided with a fixing hole.

7. A single board lens as claimed in claim 1, wherein: the outer diameter of the lens is less than 13mm.

Images