Temperature control laser detection apparatus
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United States of America Patent
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Oct 20, 1987
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N/A
app pub date -
Apr 15, 1985
filing date -
Apr 15, 1985
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Abstract
Laser detection apparatus comprising a laser defining an active region and providing a double beam of coherent radiation, a sample to be tested located in a first part of the double beam of coherent radiation, a radiation detector arranged to receive radiation passing through the sample to be tested for providing an output indication of absorbance, a reference sample disposed in a second part of the double beam, apparatus for sensing absorption of the coherent radiation at the reference sample, apparatus for providing selectable heating of the active region of the laser, and apparatus for providing a control signal to the selectable heating apparatus in accordance with the sensed absorption of the coherent radiation at the reference sample.
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