An underwater laser line scan digital imaging system

Abstract

The invention discloses an underwater laser line scanning digital imaging system which comprises an upper computer module (8), a cylindrical pressure resistant shell (9), a laser module (1), an optical-mechanical-electrical scanning module and a digitization camera shooting module, wherein the laser module (1), the optical-mechanical-electrical scanning module and the digitization camera shooting module are installed inside the shell (9). The laser module (1) comprises a solid-state frequency doubling laser device, an optical focusing system and a laser control system. The optical-mechanical-electrical scanning module comprises an input reflecting mirror (2), an optical subsystem (3) and an output reflecting mirror (4), wherein the optical subsystem (3) comprises an optical trigger, a motor and a rotary shaft driven by the motor. The digitization camera shooting module comprises an incident hole (5), a receiving machine (6), a low-noise pre-amplifier and a video processing system (7). The upper computer module (8) comprises a keyboard, a mouse and a video monitor. According to the underwater laser line scanning digital imaging system, back scattering influences in absorption and scanning water space can be reduced to the maximum degree, and a high-resolution image can be provided.

Description

technical field [0001] The invention relates to an underwater laser imaging system, in particular to an underwater laser line scanning digital imaging system. Background technique [0002] In recent years, underwater photoelectric imaging detection technology is being paid more and more attention by researchers from various countries. It can be used to detect fast-moving targets, and it can also be used for lifesaving, salvage and resource development. However, due to the scattering and absorption of light waves by suspended particles in seawater and water molecules, the attenuation of the laser beam in seawater is quite fast, and the attenuation degree is exponentially related to the imaging distance, resulting in defects such as large image noise and poor imaging quality. [0003] Chinese patent application 201310071635.6 discloses "a detection and imaging system based on laser scanning". The system is characterized by using laser light as the light source to collect and i...

AI Technical Summary

Problems solved by technology

However, none of the above-mentioned systems and devices can effectively solve the effect of laser beam backscattering, which will significantly reduce the quality of laser imaging and significantly shorten the distance of observation and imaging.

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