Panoramic optical system based on free-form surface design

Abstract

The embodiment of the invention discloses a panoramic optical system based on free-form surface design, and the system sequentially comprises a first lens and a seventh lens from an object surface to an image surface along an optical axis: the object surface sides of the first lens and the seventh lens are convex surfaces, the image surface sides of the first lens and the seventh lens are concave surfaces, and the focal powers of the first lens and the seventh lens are negative; the second lens is a biconcave lens, and the focal power of the second lens is negative; the image surface side of the third lens is a concave surface, and the focal power of the third lens is negative; the object plane sides of the fourth lens and the fifth lens are convex surfaces, and the focal power of the fourth lens and the fifth lens is positive; the object plane side of the sixth lens is a concave surface, the image plane side is a convex surface, and the focal power is negative; the object plane sides of the eighth lens and the ninth lens are convex surfaces, and the focal power of the eighth lens and the ninth lens is positive. The optical system provided by the embodiment of the invention is mainly composed of nine lenses, adopts a free-form surface design surface type, and has the optical properties of ultra-wide angle, high pixel, elliptical image circle, good athermalization and the like.

Description

Technical field: [0001] The invention relates to an optical system, in particular to a panoramic optical system based on a free-form surface design applied in the field of panoramic cameras. Background technique: [0002] The panoramic fisheye optical system is an optical system with a field of view reaching or exceeding 180°. With the development of high-definition chips with tens of millions of pixels and the mature application of image distortion processing algorithms, the market application of panoramic fisheye optical systems and panoramic cameras More and more, such as sports cameras, security monitoring, panoramic maps, intelligent driving assistance parking and other scene fields. As the visual input of panoramic applications, the imaging quality of panoramic fisheye imaging optical systems directly determines the key features of panoramic applications such as effective pixels, field of view, image processing, and algorithm stitching. Effective pixel is the key tech...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems that the existing optical systems used in the field of panoramic cameras generally have too small a lens imaging circle and low utilization rate of effective pixels of the chip, the embodiments of the present invention provide a panoramic optical system based on a free-form surface design on the one hand

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