An ultra-wide-angle optical system and imaging method thereof

Abstract

The invention relates to an ultra-wide-angle optical system and an imaging method thereof. The optical system comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens and a first lens, a second lens, a third lens, a diaphragm, a fourth lens and The fifth lens, the first lens is a meniscus negative lens, the second lens is a meniscus negative lens, the third lens is a biconvex positive lens, the fourth lens is a meniscus positive lens, the fifth lens is a biconvex positive lens, and the third lens is a biconvex positive lens. The four lenses and the fifth lens are cemented together to form a cemented lens; the first lens and the third lens are spherical lenses, all made of glass; the second lens, the fourth lens and the fifth lens are aspherical lenses, all made of Made of plastic material. The design of the invention has the characteristics of a large field of view and a large amount of light; the multi-piece aspheric lens design scheme is adopted, and the overall reliability is high, the lens assembly sensitivity is low, the yield is high, and the cost is low, which is conducive to mass production; imaging; High quality, reaching the level of 2-megapixel high-definition video.

Description

Technical field: [0001] The invention relates to an ultra-wide-angle optical system and an imaging method thereof. Background technique: [0002] In recent years, with the rapid development of automotive driving assistance systems, vehicle rearview lenses have been widely used in vehicle monitoring systems to provide drivers with functions such as rearview images and reversing assistance. The traditional image-based reversing camera system only installs cameras at the rear of the vehicle, which can only cover a limited area around the rear of the vehicle, and the blind spots around the vehicle and the front of the vehicle undoubtedly increase the hidden danger of safe driving. Collision and scratch events occur. To expand the driver's field of view, an optical system that provides a larger field of view is required. Invention content: [0003] The present invention makes improvements to the problems existing in the above-mentioned prior art, that is, the technical proble...

AI Technical Summary

Problems solved by technology

The traditional image-based reversing camera system only installs cameras at the rear of the vehicle, which can only cover a limited area around the rear of the vehicle. The blind spots around the vehicle and the front of the vehicle undoubtedly increase the hidden danger of safe driving. Bump and scrape events

Images