Analysis of the Features of Calculating the Background Radiation Characteristics when Solving Problems of Laser Location in the Infrared Range of the Spectrum

Abstract

The article considers the proposed method for calculating the background radiation characteristics when solving problems of laser location in the infrared range of the spectrum. The process of laser ranging in the infrared range is described for the case of an extended homogeneous background, which is characterized by emissivity and absolute temperature. Expressions for the diffusely reflected laser and intrinsic thermal reduced fluxes of background radiation are derived. The calculation of the reduced flux of diffusely reflected laser radiation was carried out taking into account the features of the main schemes for constructing laser location systems (LLS). An expression is obtained for the total background radiation flux, which takes into account the effect of diffusely reflected probing laser radiation and the intrinsic thermal radiation of the underlying surface. Graphs of dependences of background radiation fluxes for several typical values of the laser location system internal characteristics (power of the laser radiation source, design parameters of the receiving optical system) and external conditions (absolute temperature and emissivity of the underlying background surface) are presented. Taking into account the dependence graphs of background fluxes, the limiting values of the design parameters of laser location systems and external conditions were determined, under which the value of the intrinsic thermal reduced radiation flux significantly prevails over the value of the diffusely reflected laser reduced radiation flux

Please cite this article in English as:

Baryshnikov N.V., Stepanov R.O., Lebedev V.A. Analysis of the features of calculating the background radiation characteristics when solving problems of laser location in the infrared range of the spectrum. Herald of the Bauman Moscow State Technical University, Series Instrument Engineering, 2022, no. 1 (138), pp. 4--19 (in Russ.). DOI: https://doi.org/10.18698/0236-3933-2022-1-4-19

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