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Proceedings Paper

Calculation of thermal contrasts and potentials of the infrared images in spectral ranges 3-5 um and 8-14 um at the availability and in the absence of counterradiation of the environment
Author(s): A. N. Sviridov
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Paper Abstract

The calculations (for two spectral ranges, used in thermal imagines: 3...5 μm and 8...14 μm of thermal contrasts and potentials of the infrared images of objects of observation (OO), were carried out both availability the counterradiation of the environment, and in the absence of the counterradiation. (The counterradiation is a radiation, falling on OO, from the sky, from the surface of the Earth and from surface of the Earth surface). Is shown that in the infrared image in viewed spectral ranges (unlike the images of these OO in a visual spectral range) always (both at availability of and in its absence the counterradiation disappearance of some local areas (LA) - OO areas which temperature or (and) numerical coefficient γi the quantity of which is determined by is temperature, reflection factor and average for OO values of these quantities. The calculations of numerical quantities of coefficients of disappearing LA on the temperature of the environment were carried out. It is shown that the availability of a counterradiation alongside with the decrease diminution of the image contrast can (under certain conditions) result in inversion, i.e. that LA with smaller coefficients of radiation acquire more brightness, than LA with larger coefficients of radiation.

Paper Details

Date Published: 30 September 2003
PDF: 14 pages
Proc. SPIE 5126, 17th International Conference on Photoelectronics and Night Vision Devices, (30 September 2003); doi: 10.1117/12.517351
Show Author Affiliations
A. N. Sviridov, Research, Development, and Production Ctr. ORION (Russia)

Published in SPIE Proceedings Vol. 5126:
17th International Conference on Photoelectronics and Night Vision Devices
Anatoly M. Filachev; Alexander I. Dirochka, Editor(s)

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