TWI470279B - A super wide viewing angle lens and the wide viewing angle lens manufacture method - Google Patents

Description

Ultra-wide viewing angle lens and manufacturing method thereof

An ultra-wide viewing angle lens and a manufacturing method thereof, in particular to an ultra-wide viewing angle lens having a convex-concave lens structure and a manufacturing method thereof.

With the development of imaging technology, more and more products use imaging devices, and more and more requirements for imaging devices, not only require high resolution and high image quality, but also require a large imaging angle. The so-called wide viewing angle. In order to achieve a wide viewing angle, in addition to the design of the lens set, the best way is to use a wide viewing angle lens to increase the angle of the image. However, the wide viewing angle lens cannot produce the lens radius and the light effectively because of the limitation of the processing machine. A lens with a diameter ratio of more than 2 limits the design of the optical system.

The present invention relates to an ultra-wide viewing angle lens and a method for manufacturing the super wide viewing angle lens. The super wide viewing angle lens includes a first lens and a second lens; a surface of the first lens facing the object side is formed as a convex lens surface, and the convex lens The surface is a spherical structure but can also be an aspherical structure; a concave lens surface is opposite to the object side, and the concave lens mask has a curved radius R; the first lens can be formed by glass grinding, mold pressing glass, plastic Forming or forming any light material to form the first lens; the second lens is a hollow lens, a hollow region is formed through the center of the second lens, and the outer shape of the second lens can be different according to the optical The design needs to be designed into various shapes such as a circle, a square, a hexagon, etc.; the hollow region has the same concave lens surface as the first lens toward the concave surface of the first lens. An opening having a radius of the surface R, having an opening having an optical effective diameter D with respect to the other side of the opening; an outer diameter of the second lens and an outer diameter of the first lens may be the same as or different from those of the optical system design Therefore, the ultra-wide viewing angle lens can be more elastic in optical design, and the outer surface and the inner surface of the second lens can be a smooth surface or a spherical lens according to the design of the optical system, and the The material of the second lens may be made of glass, plastic or other material having optical properties; by the combination of the first lens and the second lens, the radius of curvature of the concave surface of the first lens and the optical effective diameter of the second lens are formed. The structure with the ratio greater than 2 not only increases the angle of the lens and the amount of light incident, but also improves the image aberration quality and improves the image quality by the aspherical design of the first lens and the second lens surface.

1‧‧‧Super wide viewing angle lens

2‧‧‧ object side

3‧‧‧ image side

10‧‧‧ first lens

11‧‧‧ convex lens surface

12‧‧‧ concave lens surface

13‧‧‧ Surface

14‧‧‧ OD

20‧‧‧second lens

21‧‧‧ hollow area

22‧‧‧ openings

23‧‧‧ openings

24‧‧‧ outside diameter

R‧‧‧Surface radius

D‧‧‧ Optical Effective Trail

Figure 1 is a schematic view of the ultra-wide viewing angle lens

2 is a schematic view of the first lens of the super wide viewing angle lens

Figure 3 is a front view of the first lens of the super wide viewing angle lens

4 is a schematic view of the second lens of the super wide viewing angle lens

Figure 5 is a front view of the second lens of the super wide viewing angle lens

Referring to FIG. 1 to FIG. 3 , the super wide viewing angle lens 1 includes a first lens 10 and a second lens 20 , and the second lens 20 is located on a side of the first lens 10 opposite to the object side 2 ; A lens 10 has a convex and concave hemispherical lens structure. The first lens faces the object side 2 side as a convex lens surface 11, and the convex lens surface 11 side is a concave lens surface 12 having a curved surface R of a curved radius R. And an outer diameter 14; the first lens 10 can be formed by lens processing, such as processing, injection molding, etc.; further, the convex lens surface 11 of the first lens 10 can be designed as a different optical structure such as an aspherical structure. Or a spherical structure for reducing the influence of the aberration caused by the difference in the light stroke and thereby improving the image quality; and the material forming the first lens 10 may be glass or plastic. The first lens 10 has a first refractive index; therefore, referring to FIG. 4 to FIG. 5, the second lens 20 is a hollow lens, and the second lens center penetrates to form a hollow region 21, and the second lens The outer shape can be designed into various shapes such as a circle, a square, a hexagon, and the like according to different optical designs. The hollow region 21 has the same curved surface as the concave lens surface 12 toward the concave lens surface 12 side of the first lens 10. An opening 22 having a radius R is formed with an opening 23 having an optical effective diameter D with respect to a side of the concave lens surface 12 of the first lens 10; and an outer diameter 24 of the second lens 20 and an outer diameter 14 of the first lens 20 Depending on the design requirements of the optical system, the inner surface and the outer surface of the second lens 20 may be designed to have different optical structures. The material forming the second lens 20 may be Glass or plastic, so the second lens 20 has a second refractive index; the concave lens surface 12 side of the first lens 10 is combined with the opening 22 of the second lens 20 to form the super wide-angle lens 1 The optical adhesive may be a way of gluing or ultrasonic welding, etc. to be combined.

The super wide viewing angle lens 1 combines the combination of the first lens 10 and the second lens 20 to make the super wide viewing angle lens have a ratio of a curved surface radius greater than 2 to an effective diameter of the light, thereby increasing the super wide viewing angle lens. The image capturing angle and the amount of light incident, and the aspherical surface design of the first lens 10 and the second lens 20 can improve the image aberration effect and improve the image quality.

The above description is only for the detailed description and drawings of the preferred embodiments of the present invention, but the features of the present invention are not limited thereto, and are not intended to limit the creation. All the scope of the present invention should be as follows. The embodiment of the spirit of the patent application and its similar changes should be included in the scope of this creation. Anyone familiar with the artist can easily think about it in the field of creation. Modifications can be covered in the scope of the patents in this case below.

1‧‧‧Super wide viewing angle lens

2‧‧‧ object side

3‧‧‧ image side

10‧‧‧ first lens

20‧‧‧second lens

Claims (10)

An ultra-wide viewing angle lens includes: a first lens, the first lens includes a convex lens surface and a concave lens surface, wherein the first lens faces the object side is the convex lens surface, relative to the One side of the convex lens surface is the concave lens surface, the concave lens mask has a radius of curvature; a second lens is a ring lens, a hollow region is formed through the center, and the opening of the second lens side has an optical An effective diameter; a concave lens surface of the first lens is coupled to the second lens, wherein a ratio of a radius of curvature of the first lens to an optical effective diameter of the second lens is greater than 2. The ultra-wide viewing angle lens of claim 1, wherein the convex lens mask of the first lens has an optical structural surface. The ultra-wide viewing angle lens according to claim 2, wherein the optical structural surface of the convex lens surface of the first lens is an aspherical mirror surface. The ultra-wide viewing angle lens of claim 1, wherein the outer surface of the second lens has an optical structural surface. The ultra-wide viewing angle lens of claim 4, wherein the optical structural surface of the outer surface of the second lens is an aspherical mirror surface. The ultra-wide viewing angle lens of claim 1, wherein the first lens and the second lens are glued with an optical glue. The ultra-wide viewing angle lens of claim 1, wherein the first lens and the second lens are combined by ultrasonic waves. The ultra wide viewing angle lens of claim 1, wherein the first lens and the second lens are formed of the same material. The ultra wide viewing angle lens of claim 1, wherein the first lens and the second lens are formed of different materials. The ultra-wide viewing angle lens of claim 1, wherein the first lens is a hemispherical lens.