Testing system for transmission characteristic of laser in low-contrast environment and testing method of testing system

Abstract

The invention discloses a testing system for a transmission characteristic of a laser in a low-contrast environment and a testing method of the testing system. The testing system includes a polarizedlight generating device, a haze medium generation simulating device and a scattering effect measurement device; the scattering effect measurement device comprises a beam splitter prism, a polarizationstate gauge, an optical power meter and a computer; the beam splitter prism corresponds to an emitting glass window of the haze medium generation simulating device, and the optical power meter and the polarization state gauge are arranged on two beam transmission paths of the beam splitter prism respectively. Smoke granularity is measured only through a granularity gauge, the intensity of scattered light and a polarization stokes vector are measured by the optical power meter and the polarization state gauge, the polarization degree, linear polarization degree, polarization angle and circle polarization degree of polarized light are obtained through calculation, and finally an optical model of a complicated environment of haze mediums is created. The polarized light does not need to be subjected to conversion such as attenuation, phase delay, polarizing and the like, an original state of the polarized laser after the the polarized laser is emitted from the environment of the haze mediums is preserved, measurement is more accurate, and therefore description of the transmission characteristic of the laser is more accurate.

Description

technical field [0001] The invention relates to a laser detection method, in particular to a test system and a test method for the transmission characteristics of laser light in a low-contrast environment. Background technique [0002] In terms of research on the scattering effect test system, foreign countries have carried out research earlier, and have successively established various environmental simulation equipment of different scales, such as the vehicle environment test system of the British Army Academy of Sciences, whose temperature measurement range can reach 50 degrees, and the humidity can reach 50 degrees. 85×(1±0.05) RH (≤40℃), the maximum solar radiation intensity is 1kW / m2, and the simulated maximum wind speed is 35m / s. , The multi-spectral polarization projection system of the weapon environment at the Aberdeen Proving Ground in the United States uses short-thin infrared imaging. The system can generate still images and video images (up to 200 Hz). [0003...

AI Technical Summary

Problems solved by technology

[0003] However, the scattering environment of haze media or other media with uneven particle distribution and irregular particle shape is quite complicated. These scattering media will have a considerable impact on light transmission and traditional optical imaging, resulting in a decrease in the contrast of the imaging effect. , the clarity is not high

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