Underwater low-light color imaging design method based on prism light splitting

Abstract

The invention relates to a full-sea-depth low-light color imaging design method based on prism light splitting, and the method comprises the following steps: firstly analyzing the generation reason of underwater aberration, determining the shape and material of an optical window, and manufacturing the optical window by adopting a tempered high borosilicate glass concentric equal-thickness spherical cover with excellent optical performance and compression resistance to ensure the energy utilization efficiency; designing a correction lens group and an imaging lens group according to the parameters of the optical window to complete the design of the underwater special optical system with the long rear working distance; calculating and controlling the incident angle of light rays on a prism interface, ensuring the total reflection condition of the light rays on a specified interface, and achieving real-time imaging of the three-spectrum-band detector through an exquisite prism light splitting structure; and conducting optical aberration correction in combination with aberration characteristics of a water body and a window material medium, so as to complete underwater low-light color imaging design. According to the method, a colored real scene of an underwater low-light environment can be restored, and optimal design of an underwater imaging system is realized.

Description

【Technical field】 [0001] The invention relates to the technical field of photoelectric imaging systems, in particular to a design method for underwater low-light color imaging based on prism spectroscopy. 【Background technique】 [0002] The ocean covers 71% of the earth's surface. It is rich in mineral resources, rich in biological species, and has huge energy reserves. Optical imaging equipment has the characteristics of high resolution and in-situ recording. Provide comprehensive and detailed image data. [0003] The seawater attenuates the visible light band seriously, and there is no natural light in the deep sea, so only active lighting can be used. The optical system must make full use of the limited light energy of the platform, and the color reproduction and low-light performance of underwater optical imaging are the primary problems to be solved. [0004] In the prior art, conventional color detectors use Bayer mode to filter colors, which limits the utilization e...

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Problems solved by technology

[0004] In the existing technology, conventional color detectors use Bayer mode to filter colors, which limits the utilization efficiency of spectral energy; and the color obtained by interpolation of each pixel is also biased, and the single-detector solution cannot take into account low-light and color performance at the same time

[0005] The low-light performance of traditional imaging equipment is achieved on the premise of sacrificing the depth of field. Although there have been solutions for prism spectroscopic and spectral segment collection in broadcast television and industrial application scenarios, there is a lack of special optical lens group design for water media. , the existing underwater imaging equipment cannot meet the requirements of high-quality low-light color applications

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