26 October 1998 Spot shape and size on the focal plane of specific infrared nonimaging sensors for the detection of forest fires
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Abstract
This paper describes some of the work performed in the course of the design and development of a new IR sensor system for early detection of forest fires. The proposed device is a non- imaging sensor that would discriminate angular position by means of a simple IR array, working in the 3 - 5 microns wavelength region, placed at the focal plane of the optical system. In order to accomplish low cost requirements, a system with a sole IR lens has been designed. In this work, a study of the spot shape, size and optical IR power on the detector has been performed. From the analysis of the influence of lens-detector distance and incidence angle, we have derived an optimum pixel size and optical configuration. The use of TE- cooled PbSe detectors is proposed, as well as a simplified cell array.
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Fernando Lopez, Antonio J. de Castro, Jose Manuel Aranda, Juan Melendez, Marta Ugarte, Jesus Meneses, Susana Briz, "Spot shape and size on the focal plane of specific infrared nonimaging sensors for the detection of forest fires", Proc. SPIE 3436, Infrared Technology and Applications XXIV, (26 October 1998); doi: 10.1117/12.327996; https://doi.org/10.1117/12.327996
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