Optical system for infrared medium and long wave spectrum imaging

Abstract

The invention discloses an optical system for infrared medium and long wave spectrum imaging. The optical system comprises a board band lens assembly and a multi-spectral filter assembly. The board band lens assembly is arranged in front of the multi-spectral filter assembly and used for optical wave focus imaging. The multi-spectral filter assembly is used for conducting filtering and cofocal plane compensation on optical wave used for focusing the broad band lens assembly. The optical system for imaging is large in hole diameter which can reach 0.9-1.1, and imaging quality approaches diffraction limit. The optical system adopts the broad band lens assembly and the multi-spectral filter assembly to achieve the multi-spectral imaging system. The system is simple in structure and easy to achieve. Cofocal plane compensation in narrow band imaging is well achieved by thickness change of a band-pass parallel plate filter, and complexity of broad band lens design is reduced. The optical system is used for non-refrigeration broadband infrared multi-spectral imaging and has wide application prospect in the fields of military industry and civil use.

Description

technical field [0001] The invention relates to the technical field of infrared imaging optics, in particular to a multi-spectral imaging optical system working in the 3 μm-12 μm band, large relative aperture, and narrow band confocal plane. Background technique [0002] Broadband infrared multispectral imaging can improve the ability of information detection and recognition, and it has broad application prospects in military reconnaissance, aerospace remote sensing, industrial vision and other fields. At present, uncooled infrared detectors based on the pyroelectric effect can simultaneously respond to infrared light radiation in the medium-wave to long-wave bands. This makes it necessary to develop a broadband multispectral infrared imaging optical system for uncooled detectors. [0003] The commonly used structural forms of infrared imaging optical systems are reflective and refractive. The reflective structure does not introduce any chromatic aberration, and the optica...

AI Technical Summary

Problems solved by technology

At present, there is no report on the multi-spectral infrared imaging optical system working in the medium-wave to long-wave infrared band, aiming at a single wide-band detector, large relative aperture, and narrow-band confocal surface.

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