A super wide-angle optical system and its applied lens

Abstract

The embodiment of the invention discloses an ultra-wide-angle optical system. From an object surface to an image surface along an optical axis, the ultra-wide-angle optical system successively at least comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens and a ninth lens, wherein the focal power of the first lens is negative, the focal power of the second lens is negative, the focal power of the third lens is negative, the focal power of the fourth lens is positive, the focal power of the fifth lens is positive, the focal power of the sixth lens is negative, the focal power of the seventh lens is positive, the focal power of the eighth lens is negative, and the focal power of the ninth lens is positive. The embodiment of the invention further provides a lens unit. The optical system or the lens unit is formed by 9 lenses, the number of the lenses is small, and the structure is simple; in addition, the different lenses are combined and reasonably distribute the focal power, so that the good performance such as a large aperture, a larger view angle and high definition is realized.

Description

Technical field: [0001] The invention relates to an optical system and a lens for its application, in particular to an ultra-wide-angle optical system and a lens for its application. Background technique: [0002] Existing optical systems or lenses, especially ultra-wide-angle optical systems or lenses, have the defects of a large number of lenses and complex structures. Invention content: [0003] In order to overcome the problems of a large number of lenses and a complex structure in existing optical systems or lenses, an embodiment of the present invention provides an ultra-wide-angle optical system. [0004] An ultra-wide-angle optical system, which sequentially includes at least a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens along an optical axis from an object plane to an image plane. lens, and a ninth lens; [0005] The object plane side of the first lens is a convex surface, the image plane...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of the existing optical system or lens with a large number of lenses and a complex structure, the embodiments of the present invention provide an ultra-wide-angle optical system on the one hand

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