Small-size ultra-wide-angle day and night dual-purpose optical system

Abstract

The embodiment of the invention discloses a small-size ultra-wide-angle day and night dual-purpose optical system which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object plane to an image plane along an optical axis. The object plane sides of the first lens and the seventh lens are convex surfaces, the image plane sides are concave surfaces, and the focal power is negative; the object plane side of the second lens is a concave surface, the image plane side is a convex surface, and the focal power is positive; the object plane side of the third lens is a concave surface, the image plane side of the third lens is a convex surface, and the focal power is negative; the fifth lens is a biconcave lens, and the focal power of the fifth lens is negative; the fourth lens and the sixth lens are biconvex lenses, and the focal power of the fourth lens and the focal power of the sixth lens are positive. The optical system is mainly composed of seven lenses, the number of the lenses is reasonable, the structure is simple, the size is small, product miniaturization is facilitated, and the optical system is suitable for an intelligent doorbell or an intelligent home system.

Description

Technical field: [0001] The invention relates to an optical system, in particular to a small-volume ultra-wide-angle day-night dual-purpose optical system. Background technique: [0002] At present, camera modules are widely used in smart home systems such as video doorbell products. Previous camera modules or optical systems have defects such as complex structure, large size, small viewing angle, low pixels, and poor day and night effects, which are difficult to meet the needs of users. demand. Invention content: [0003] In order to overcome the problems of complex structures and large volumes existing in existing optical systems or camera modules, the embodiments of the present invention provide, on the one hand, a small-volume ultra-wide-angle day-night dual-purpose optical system. [0004] A small-volume ultra-wide-angle day-night dual-purpose optical system, which sequentially includes: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of complex structure and large volume in existing optical systems or camera modules, the embodiments of the present invention provide a small-volume ultra-wide-angle day-night dual-purpose optical system

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