Infrared Controllable Partially Polarized Radiation Source

Abstract

The invention discloses an infrared controllable partially polarized radiation source, which comprises a temperature controller, a black body, an infrared collimator, an infrared polarizer and a reflector; the temperature controller controls the temperature of the black body, and the black body emits radiation of different wavelengths corresponding to different temperatures Infrared rays; the infrared collimator collimates the infrared rays emitted by the black body; the infrared polarizer turns the collimated infrared rays into linearly polarized radiation; the reflector changes the linearly polarized radiation in two mutually perpendicular vibrations according to the incident angle of the linearly polarized radiation The phase difference in the direction, and reflect and output part of the polarized radiation corresponding to the polarization state. The above-mentioned infrared controllable partially polarized radiation source can produce infrared partially polarized radiation with different polarization states and known polarization parameters, and can generate partially polarized radiation within a large range of polarization degrees. The polarization state of the partially polarized radiation is controllable and the polarization degree is known. , and the degree of polarization is stable and the precision is high under certain environmental conditions, and it is suitable for polarization calibration of infrared polarization imaging systems.

Description

technical field

[0001] The invention relates to the field of polarized optics, and more specifically relates to an infrared controllable partially polarized radiation source. Background technique

[0002] Infrared polarization imaging system has advantages in detecting man-made targets in complex natural backgrounds and identifying some targets and backgrounds, and has become a research hotspot at home and abroad in recent years. However, due to the polarization effect of the infrared polarization imaging system itself, false polarization information will be generated, which affects the accuracy of the polarization detection information inversion. In order to improve the inversion accuracy, it is necessary to perform polarization calibration on the infrared polarization imaging system. At present, the polarization calibration work at home and abroad mainly uses linear polarizers, λ / 4 wave plates and non-polarized radiation sources to produce completely polarized radiations s...

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