Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1985-04-15
1987-10-20
LaRoche, Eugene R.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
356319, 372 32, 372 34, G01J 100, H01S 313
Patent
active
047016078
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.
REFERENCES:
patent: 3858056 (1974-12-01), Melamed et al.
patent: 4410273 (1983-10-01), Mantz et al.
Adler Eli
El-Hanany Uri
Lachish Uri
Rotter Shlomo
Arel Control Systems, Ltd.
LaRoche Eugene R.
Lee James C.
Lynn John H.
State of Israel
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