Common-aperture underwater optical system

Abstract

The invention discloses a common-aperture underwater optical system, which comprises a polarizer, a laser diverging mirror, a perforated reflector, a shading cylinder, an optical window, an analyzer and an imaging lens which are sequentially arranged along an emergent light path of a laser and a target return light path, the shading cylinder is conical and extends to the optical window from the small hole of the reflector with the hole, and the reflector with the hole is obliquely arranged at an angle of 45 degrees; when the system works, collimated laser emitted by the laser device is emitted through the polarizer, the laser diverging mirror, the shading cylinder and the optical window to illuminate an underwater target, target echoes enter the optical window, enter the imaging lens after being reflected by the perforated reflector and subjected to polarization analysis by the polarization analyzer, and are imaged on a target surface; the reflector with the hole is obliquely arranged at an angle of 45 degrees, so that illumination and imaging are ensured to share an optical axis and an aperture.

Description

technical field [0001] The invention belongs to the technical field of underwater photoelectric imaging, and in particular relates to a common-aperture underwater optical system. Background technique [0002] The common-aperture underwater optical system refers to the optical system used in the active optoelectronic imaging system with its own light source underwater, and is mainly used for range-gated underwater laser imaging systems. [0003] Under water, the imaging environment is much more complex than in the air, the imaging distance is greatly shortened, and the imaging quality is also significantly reduced. Due to strong water body scattering and short imaging distance, the illumination window and imaging window of the underwater active photoelectric imaging system are usually separated, such as the LUCIE series range-gated laser imaging system of the Valcartier National Defense Research Institute in Canada, and the SeeRay of the American Spartz company. Underwater l...

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Problems solved by technology

[0004] At present, there is no report on the common-aperture underwater optical system, but in order to obtain underwater close-range high-resolution 3D images and eliminate illumination and imaging parallax, the laser emission and imaging optical axes are designed to coincide to achieve common-aperture Underwater electro-optical imaging is absolutely necessary

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