8 mm day-night dual-purpose large-light-flux large-target-surface prime lens and imaging method thereof

Abstract

The invention relates to an 8 mm day-night dual-purpose large-light-transmission large-target-surface prime lens, which is characterized in that the optical system of the lens comprises a front lens group A with negative focal power and a rear lens group B with positive focal power which are sequentially arranged from front to back along an incident light path, the front lens group A comprises a negative meniscus lens A-1, a negative meniscus lens A-2 and a positive meniscus lens A-3 which are sequentially arranged from front to back, and the rear lens group B comprises a biconvex lens B-1, abiconcave lens B-2, a biconvex lens B-3, a negative meniscus lens B-4 and a biconvex lens B-5 which are sequentially arranged from front to back. According to the invention, the lens is simple in structure, reasonable in design, short in total optical path length, small in size, and good in imaging quality; and the F value is extremely small, so that the light flux of the lens is improved, the whole picture is brighter, the performance of the lens in a low-illumination environment is better, a clearer imaging effect is presented, and a day and night universal function is realized.

Description

technical field [0001] The invention relates to an 8mm day and night dual-purpose Datong Everbright target surface fixed-focus lens and an imaging method thereof, belonging to the technical field of optical devices. Background technique [0002] With the rapid development of the camera lens market, in recent years, a relatively standardized, stable, and miniature camera lens that can be used with cameras has been formed. Under stable lens imaging conditions, customers' requirements for lens light flux continue to increase. Currently, the security lens on the market has the problem of low light transmission and not clear imaging. Contents of the invention [0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide an 8mm day and night dual-purpose Datong Guangda target surface fixed-focus lens and its imaging method. [0004] In order to solve the above-mentioned technical problems, the technical solution...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the camera lens market, in recent years, a relatively standardized, stable, and miniature camera lens that can be used with cameras has been formed. Under stable lens imaging conditions, customers' requirements for lens light flux continue to increase. The current security lens on the market has the problem of low light transmission and insufficient image clarity.

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