High-pixel ultra-wide-angle optical system

Abstract

The embodiment of the invention discloses a high-pixel ultra-wide-angle optical system. 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 are arranged along the optical axis from the object surface to the mirror surface; 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 positive; the focal power of the seventh lens is negative; the focal power of the eighth lens is positive. The optical system meets the formula that TTL / EFL is smaller than or equal to 16.8, wherein TTL is the distance from the side top point of the object surface to the imaging surface of the first lens of the optical system, and EFL is the valid focal power of the optical system. According to the embodiment, the optical system ismainly composed of eighth lenses and is simple in structure; different lenses are adopted and mutually combined, the focal power is reasonably distributed, and the optical system has the advantages of large aperture, wide visual angle, high pixel, extremely good athermalization and other good performance.

Description

Technical field: [0001] The invention relates to an optical system, in particular to a high-pixel ultra-wide-angle optical system. Background technique: [0002] With the development of semiconductor technology, the pixels of the photosensitive element are getting higher and higher, and the light-receiving area of ​​the photosensitive element is also getting larger and larger. The ultra-wide-angle optical system tends to develop with higher pixels and a larger target surface. However, the existing wide-angle optical systems generally have the defects of low pixel size and high cost. Invention content: [0003] In order to overcome the common problem of low pixels in existing wide-angle optical systems, an embodiment of the present invention provides a high-pixel ultra-wide-angle optical system. [0004] The high-pixel ultra-wide-angle optical system is provided in sequence along the optical axis from the object plane to the image plane: the first lens, the second lens, th...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem of low pixels common in existing wide-angle optical systems, the embodiment of the present invention provides a high-pixel ultra-wide-angle optical system

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