Telephoto large-aperture optical lens and working method thereof

Abstract

The telephoto large-aperture optical lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens which are sequentially arranged from left to right along a light incident light path, wherein the first lens is a meniscus positive lens, the second lens is a meniscus negative lens, the third lens is a biconcave negative lens, the fourth lens is a biconvex positive lens, the fifth lens is a biconvex positive lens, and the sixth lens is a meniscus negative lens; the effective focal length is gt; the distance is 15mm, so that a long-distance object can be accurately identified and imaged; a small F-number design is adopted, the clear aperture of the system is larger, and the picture brightness performance is better; the imaging target surface is large and the peripheral brightness ratio is gt; imaging can be carried out in a phi 9.2 mm image plane area with uniform illumination; the imaging quality is excellent, and the axial aberration of a full working wave band is lt; the thickness is 0.05 mm, and the maximum transverse color difference is lt; high-frequency space information can be effectively reserved, and the high-definition camera shooting CMOS with the resolution of 4K and above can be adapted.

Description

Technical field: [0001] The invention relates to a telephoto large aperture optical lens and a working method thereof. Background technique: [0002] Nowadays, the development trend of vehicle-mounted lenses is ultra-high-definition, ultra-wide-angle and large target surface, the purpose of which is to form a more comprehensive and higher-quality motor vehicle field of view; front and rear-view vehicle-mounted lenses generally have higher requirements for imaging quality, because the current The mainstream algorithm needs to judge the distance according to the size of the image of the object, so the resolution of the optical system is of great value to ensure driving safety; however, the front group of the general telephoto lens has a large aperture and is not suitable for use in vehicle scenarios. Therefore, How to meet the technical requirements of high image quality, small size, large aperture, and telephoto at the same time has become a major technical problem faced by c...

AI Technical Summary

Problems solved by technology

[0002] Nowadays, the development trend of vehicle-mounted lenses is ultra-high-definition, ultra-wide-angle and large target area. The purpose is to form a more comprehensive and high-quality motor vehicle field of vision; front and rear view vehicle lenses generally have higher requirements for imaging quality. The reason is that the current The mainstream algorithm needs to judge the distance according to the size of the object imaged, so the resolution of the optical system is of great value to ensure driving safety; however, the general telephoto lens has a large front group aperture and is not suitable for vehicle scenes. How to simultaneously meet technical requirements such as high image quality, small size, large aperture, and telephoto has become a major technical problem faced by current lens manufacturers

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