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Proceedings Paper

Stand-alone sensor for remote measurement of subzero temperatures
Author(s): Ashok N. Kaul; A. V. Raja Kumar; Om Prakash Nijhawan
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Paper Abstract

The present paper describes the design, fabrication and calibration of a stand alone IR sensor which can remotely sense the radiations emitted by the snow surface. The sensor is capable of measuring temperatures from 0 degree(s)C to -30 degree(s)C. The sensor essentially comprises of three major constituents: (1) the IR optics which collects the radiation emitted by the snow surface and focuses them onto the detector, (2) the detector that converts IR radiation into an electrical signal and finally, (3) the electronics module and display that processes and displays the measured snow surface temperature. The sensor design is based on a single element lithium tantalate pyroelectric detector and uses a DLC coated Ge optics operating at F/1, with an effective aperture of 57.3 mm. The output of the sensor gives the instantaneously measured snow surface temperature with an accuracy of +/- 1 degree(s)C.

Paper Details

Date Published: 29 April 1999
PDF: 4 pages
Proc. SPIE 3729, Selected Papers from International Conference on Optics and Optoelectronics '98, (29 April 1999); doi: 10.1117/12.346803
Show Author Affiliations
Ashok N. Kaul, Instruments Research and Development Establishment (India)
A. V. Raja Kumar, Instruments Research and Development Establishment (India)
Om Prakash Nijhawan, Instruments Research and Development Establishment (India)


Published in SPIE Proceedings Vol. 3729:
Selected Papers from International Conference on Optics and Optoelectronics '98
Kehar Singh; Om Prakash Nijhawan; Arun Kumar Gupta; A. K. Musla, Editor(s)

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