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Optical Engineering

Infrared radiometry using silver halide fibers and a cooled photonic detector
Author(s): Ophir Eyal; Albert Zur; Ofer Shenfeld; Mordechai Gilo; Abraham Katzir
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Paper Abstract

A fiber optic radiometer based on a cooled photonic detector was designed and constructed. The radiometer is capable of measuring in real time the temperature of tissue irradiated with a CO2 laser. A silver halide IR fiber is used to deliver the CO2 laser radiation to the target and also to deliver the thermal radiation emitted from the target back to the detector. Two methods of measurements were examined, both of which solve the problem of detector blinding by reflected CO2 radiation. A theory of operation for this silver halide fiber optic radiometer, based on lock-in amplifier techniques, is presented. A short discussion of the radiometer design and construction is given. This work forms a basis for the subject of measuring, in real time, fast radiometric signals caused by CO2 laser irradiation. Such a radiometer is very useful when dealing with pulsed photo thermal radiation with 10.6-μm CO2 laser radiation. This technique is very useful in medicine and industry.

Paper Details

Date Published: 1 February 1994
PDF: 8 pages
Opt. Eng. 33(2) doi: 10.1117/12.153196
Published in: Optical Engineering Volume 33, Issue 2
Show Author Affiliations
Ophir Eyal, Tel Aviv Univ. (Israel)
Albert Zur, Tel Aviv Univ. (Israel)
Ofer Shenfeld, Chaim Sheba Medical Ctr. (Israel)
Mordechai Gilo, ElOp Electrooptics Industries Ltd. (Israel)
Abraham Katzir, Tel Aviv Univ. (Israel)


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