High resolution day and night micro lens

Abstract

The invention relates to a high-resolution miniature lens for daytime and night. An optical system of the lens is sequentially provided with a front set A with the focal power being negative and a rear set B with the focal power being positive in the incidence direction of light. The front set A is sequentially provided with a positive crescent lens A-1, a negative crescent lens A-2 and a biconvex lens A-3. The rear set B is sequentially provided with a positive crescent lens B-1, a single concave lens B-2, a gluing set closely connected with a biconvex lens B-3 and a biconvex lens B-4. The lens can form clear images in the light environment of daytime, also can form clear images in the low-light-level environment of night through infrared light supplementation, has the advantages of being small in distortion, large in relative aperture, high in resolution, high in performance cost ratio, wide in application range and the like and can adapt to the requirement of 5-mega-pixel high-resolution video shooting, thereby being a mainstream product for home monitoring.

Description

technical field [0001] The invention relates to a camera lens device of a miniature video camera system, in particular to a high-resolution day and night dual-purpose miniature lens. Background technique [0002] After 20 to 30 years of evolution and development of small TV surveillance cameras, there are currently a variety of miniature camera lenses of various specifications and models for use with them. However, the performance indicators of these lenses vary, and most of them are low-end products with low performance indicators, which are only suitable for ordinary cameras with 200,000 to 300,000 pixels; the adaptive spectral range is narrow, and they can only be used under daytime light conditions of 480nm to 700nm; The amount of image distortion is large, the difference between the image distortion and the real scene becomes larger, and the authenticity is poor. Therefore, none of these lenses can meet current needs. [0003] Thanks to the development of science and ...

AI Technical Summary

Problems solved by technology

However, the performance indicators of these lenses vary, and most of them are low-end products with low performance indicators, which are only suitable for ordinary cameras with 200,000 to 300,000 pixels; the adaptive spectral range is narrow, and they can only be used under daytime light conditions of 480nm to 700nm; The amount of image distortion is large, the difference between the image distortion and the real scene becomes larger, and the authenticity is poor

Therefore, none of these lenses can meet current needs

Images