Assembling and aligning device and method for thermal infrared spectrum imaging system

Abstract

The invention discloses an assembling and aligning method for a thermal infrared spectrum imaging system based on a plane-array detector. As the surface of a lens plated with a thermal infrared anti-reflection film has stronger reflection on visible light, the invention provides the assembling and aligning method realized by means of auxiliary objects such as a black body, a slit pair, an auxiliary plane mirror, a precision rotary table, an internal focusing telescope, a collimator tube and the like. The method comprises: placing the black body and the slit pair on a focal plane of the collimator tube to simulate radiation at infinity, and observing the definition of an image of the slit pair on a photosensitive surface of the detector to determine relative positions of lenses and elements. The assembling and aligning method can effectively solve the problem that the thermal infrared spectrum imaging system cannot carry out optical assembling and aligning through visual measurement or other common optical instruments, shortens the assembling and aligning period of the system, and has strong repeatability.

Description

technical field

[0001] The invention relates to an optical instrument calibration process technology, in particular to a calibration device and calibration method for a long-wave infrared spectral imaging system, which is also suitable for system calibration of visible near-infrared or mid-wave infrared spectral imaging systems. Background technique

[0002] The spectral imaging system can obtain image information and pixel spectral information at the same time, and can directly analyze the material composition of the target from the acquired remote sensing data, so as to effectively identify ground objects, distinguish targets, and expose military camouflage. At present, research on spectral imaging systems in the visible and near-infrared bands is quite common at home and abroad, but research on thermal infrared bands, especially thermal infrared bands above 8 microns, and finely divided spectral imaging systems is still relatively small. Compared with foreign countries, o...

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