Infrared controllable partially-polarized radiation source

Abstract

The invention discloses an infrared controllable partially-polarized radiation source. The infrared controllable partially-polarized radiation source comprises a temperature controller, a blackbody, an infrared parallel light pipe, an infrared ray polaroid and a reflector. The temperature controller controls the temperature of the blackbody. The blackbody emits infrared rays with different wavelengths corresponding to different temperatures. The infrared parallel light pipe collimates the infrared rays emitted by the blackbody. The infrared ray polaroid converts the collimated infrared rays into linearly polarized radiation; according to different incident angles of the linearly polarized radiation, the reflector changes the phase difference of the linearly polarized radiation in two vibration directions which are perpendicular to each other and outputs partial polarized radiation of corresponding polarization states in a reflection manner. The infrared controllable partially-polarized radiation source is capable of generating partial infrared polarized radiation whose polarization states are different and polarization parameters are known, the partial polarized radiation can be generated in a larger polarization degree range, the polarization states of the partial polarized radiation are controllable, and the polarization degree is known, the polarization degree is stable and high in precision when the environment conditions are certain, and the infrared controllable partially-polarized radiation source is applicable to polarization scaling of an infrared polarization imaging system.

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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Problems solved by technology

But so far, no infrared controllable partially polarized radiation source has been seen in the prior art

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