Fisheye Surveillance Optical System and Lens for Its Application

Abstract

The embodiment of the invention discloses a fisheye monitoring optical system which at least comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens which are arranged from an object plane to an image plane in turn along an optical axis. The object plane side of the first lens is a convex plane, the image plane side is a concave plane, and the focal power is negative. The object plane side of the second lens is a convex plane, the image plane side is a concave plane, and the focal power is negative. The object plane side of the third lens is a convex plane, the image plane side is a concave plane, and the focal power is positive. The object plane side of the fourth lens is a convex plane, the mage plane side is a convex plane, and the focal power is positive. The object plane side of the fifth lens is a convex plane, the image plane side is a concave plane, and the focal power is positive. Besides, the embodiment of the invention also discloses a lens. The fisheye monitoring optical system can be applied to automobile vehicle-mounted monitoring and is mainly composed of five lenses so that the number of the lenses is less and the structure is simple; and different lenses are combined with each other so that the fisheye monitoring optical system has great properties of high performance, large aperture, large angle of visual field, short overall length and excellent temperature performance.

Description

Technical field: [0001] The invention relates to an optical system and its applied lens, in particular to a fisheye monitoring optical system and its applied lens. Background technique: [0002] Existing optical systems or lenses, especially fisheye monitoring 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 existing optical systems or lenses with a large number of lenses and complex structures, an embodiment of the present invention provides a fisheye monitoring optical system on the one hand. [0004] The fisheye monitoring optical system includes at least a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence from the object plane to the image plane along the optical axis; [0005] The object plane side of the first lens is a convex surface, the image plane side is a concave surface, and its focal power is negative; [0006] T...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of existing optical systems or lenses with a large number of lenses and complex structures, the embodiments of the present invention provide a fisheye monitoring optical system on the one hand

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