Wide Angle Low Distortion Athermalized Lens

Abstract

Disclosed is a wide-angle low-distortion athermalization lens. The wide-angle low-distortion athermalization lens is characterized in that an optical system of the lens is internally successively provided with a meniscus negative lens A1, a double-convex positive lens A2, a meniscus negative lens A3, a meniscus negative lens A4, a double-convex positive lens A5, a double-concave lens A6, a double-convex lens A7, a double-concave lens A8, a flat convex lens A9 and a double-convex lens A10 along a light left-to-right incident direction, wherein edges of A1 and A2 are leaned together, centers of A2 and A3 are leaned together, edges of A3 and A4 are leaned together, edges of A4 and A5 are leaned together, the interval between the centers of A5 and A6 is 0.90mm, A6 and A7 are glued together, centers of A7 and A8 are leaned together, edges of A8 and A9 are leaned together, and centers of A9 and A10 are leaned together. The wide-angle low-distortion athermalization lens has the following advantages: the field of view is large, the distortion is low, the full field of view of the lens is greater than 100 degrees, the distortion is smaller than 5%, athermalization is realized, the imaging quality of an MTF at a temperature of -40 DEG C to +60 DEG C at 60lp is greater than 0.5.

Description

Technical field: [0001] The invention relates to a wide-angle low-distortion athermalization lens, which belongs to the field of photoelectric technology. Background technique: [0002] Wide-angle lenses are widely used in security monitoring and vehicles, and are large-scale civilian products. Therefore, the lens of the optical system is generally reduced as much as possible to reduce the cost, and the reduction of the lens of the optical system will reduce the degree of freedom of system performance, which cannot meet the needs of special high-performance products. For example, low distortion and athermalization cannot be satisfied. Conventional wide-angle lenses generally have no special requirements for distortion, and the athermalization method is generally used to make the lens perform best at room temperature, and then the imaging at -10°C to +50°C is not too bad. When there are strict requirements for wide-angle lenses, such as military products in the desert, whic...

AI Technical Summary

Problems solved by technology

When there are strict requirements for wide-angle lenses, such as military products in the desert, which need to meet low distortion and athermalization at the same time, ordinary civilian wide-angle lenses obviously cannot meet the demand.

Images