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Ultra-wide-angle optical system and imaging method thereof

An optical system, ultra-wide-angle technology, applied in optics, optical components, instruments, etc., can solve the problems of easy collision and scratching, increase the hidden danger of safe driving, etc., and achieve reduced assembly sensitivity, cost reduction, and excellent imaging quality. Effect

Active Publication Date: 2021-01-29
FUJIAN FUGUANG TIANTONG OPTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Ultra-wide-angle optical system and imaging method thereof
  • Ultra-wide-angle optical system and imaging method thereof
  • Ultra-wide-angle optical system and imaging method thereof

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 As shown, the present invention is an ultra-wide-angle optical system, which includes a first lens L1, a second lens L2, a third lens L3, a diaphragm STO, a fourth Lens L4, fifth lens L5, fourth lens L4 and fifth lens L5 are cemented together to form a cemented lens. When imaging: the light passes through the first lens L1, the second lens L2, the third lens L3, and the fourth lens from left to right. The lens 4, the fifth lens L5, the optical filter L6, and the protective glass L7 form an image.

[0025] In this embodiment, the first lens L1 is a negative meniscus lens, the object side of which is convex, and the image side is concave; the meniscus lens with the convex surface facing outward can collect light from a large field of view as much as possible so that it enters the optical system.

[0026] In th...

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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 fifth lens which are sequentially arranged at intervals from left to right along a light incident light path, wherein the first lens is a negative meniscus lens, the second lens is a negative meniscus 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 fourth lens and the fifth lens are glued to form a gluedlens. The first lens and the third lens are spherical lenses and are both made of glass materials. The second lens, the fourth lens and the fifth lens are aspheric lenses and are all made of plasticmaterials. The design has the characteristics of ultra-large field angle and large light flux; a design scheme of multiple aspheric lenses is adopted, the overall reliability is high, the lens group assembly sensitivity is low, the yield is high, the cost is low, and large-scale production is facilitated; the imaging quality is high, and the two-megapixel high-definition camera shooting level is reached.

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 cameras 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. The blind spots around the vehicle and the front of the vehicle undoubtedly increase the hidden danger of safe driving. Bump and scrape incidents occur. In order to expand the driver's field of view, an optical system that can provide 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 ...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/04
CPCG02B13/0015G02B13/0045G02B13/006G02B13/06G02B1/041
Inventor 罗杰黄锦煖
Owner FUJIAN FUGUANG TIANTONG OPTICS