Small glass-plastic hybrid athermal prime lens

Abstract

The invention belongs to the technical field of optical devices and particularly relates to a small glass-plastic hybrid athermal prime lens. The small glass-plastic hybrid athermal prime lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens which are arranged sequentially from an object space to an image space, wherein the first lens is a convex-concave negative-power glass spherical lens, the second lens is a biconcave negative-power plastic aspherical lens, the third lens is a biconvex positive-power glass spherical lens, the fourth lens is a biconcave negative-power plastic aspherical lens, the fifth lens is a biconvex positive-power plastic aspherical lens, the sixth lens is a biconvex positive-power glass spherical lens, and the seventh lens is a concave-convex negative-power glass spherical lens. Compared with the prior art, the small glass-plastic hybrid athermal prime lens has the advantages that the small glass-plastic hybrid athermal prime lens is a 4 mm prime lens with a 4k resolution ratio, is large in clear aperture and small in size and has a wide field angle up to 140 degrees, an F value is up to 2.0, and the total optical length is smaller than 22.2 mm.

Description

technical field [0001] The invention belongs to the technical field of optical devices, in particular to a small glass-plastic hybrid athermalization fixed-focus lens. Background technique [0002] With the improvement of the security awareness of the whole society, the security monitoring system is becoming more and more popular and high-end, the chip is being updated, and the design requirements of the lens are also improving accordingly. Pixels are one of the key factors to measure the quality of a lens, and the era of 4k or 8 million pixel chips has arrived, and the mainstream four to five million pixel lenses in the market can no longer meet the needs of chips with 4k resolution. Taking into account other performance and cost of pixels at the same time has become a new challenge for lens designers. [0003] To increase the resolution of the lens, generally more lenses can be used or the aperture of the light can be reduced, but this will result in an increase in cost o...

AI Technical Summary

Problems solved by technology

Pixels are one of the key factors to measure the quality of a lens, and the era of 4k or 8 million pixel chips has arrived, and the mainstream four to five million pixel lenses in the market can no longer meet the needs of chips with 4k resolution. Taking into account other performance and cost of pixels at

Images