Low-cost wide-angle high-definition optical system and lens for its application

Abstract

The embodiment of the invention discloses a low-cost wide-angle high-definition optical system, which at least comprises a first lens, a second lens, a third lens, and a fourth lens in order from the object plane to the image plane along the optical axis, wherein the object plane side of the first lens is a plane, the image plane side of the first lens is a concave surface, and the focal power is negative; the object plane side of the second lens is a convex surface, the image plane side of the second lens is a convex surface, and the focal power is positive; the object plane side of the third lens is a plane, the image plane side of the third lens is a convex surface, and the focal power is positive; the object plane side of the fourth lens is a concave surface, the image plane side of the fourth lens is a convex surface, and the focal power is negative. The embodiment of the invention also provides a lens. The low-cost wide-angle high-definition optical system provided by the embodiment of the invention is applied to smart home and other occasions requiring day and night monitoring, and mainly comprises four lenses, the number of lenses is few, the structure is simple, and the cost is greatly reduced compared with the same specification of product. The optical system has good optical properties such as wide angle, large aperture and day and night confocus, a good temperature imaging effect, and an excellent 2M pixel resolution property.

Description

Technical field: [0001] The invention relates to an optical system and its applied lens, in particular to a low-cost large wide-angle 1080P high-definition optical system and its applied lens applied to occasions requiring day and night monitoring such as smart homes. Background technique: [0002] Existing optical systems or lenses, especially those used in smart homes and other occasions that require day and night monitoring, have the disadvantages of complex structure, small diagonal field of view, and high cost. Invention content: [0003] In order to overcome the problems of complex structure, small diagonal field of view, and high cost of existing optical systems or lenses, embodiments of the present invention provide a low-cost, wide-angle, high-definition optical system on the one hand. [0004] The low-cost large wide-angle high-definition optical system includes at least a first lens, a second lens, a third lens, and a fourth lens in sequence along the optical ax...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems of complex structure, small diagonal field of view and high cost of existing optical systems or lenses, the embodiments of the present invention provide a low-cost large wide-angle high-definition optical system on the one hand

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