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US 4,704,030 AGranted
Electromagnetic radiation detectors
AssigneeQuantum Laser Corporation
InventorsWilliam M. Steen, Vijitha M. Weerasinghe
Life of this patent
Estimating the term…
Abstract
A predetermined characteristic of a laser beam is detected by disposing a reflector (11) in the path of the beam and coupling an electromechanical transducer (12) to the reflector to detect a mechanical response of the reflector to the incident beam.
Claims25
The method of detecting a selected characteristic of a beam of electromagnetic radiation, comprising the steps of:
- (a) positioning a mirror means for interception and redirection of a high power beam of radiation;
- (b) impinging a beam of high power radiation on said mirror means;
- and,
- (c) monitoring with acoustically coupled detection means stress waves induced in said mirror means by a high frequency signal incident in the beam.
1 more element
Apparatus for the detection of a selected characteristic of a beam of electromagnetic radiation, comprising:
- (a) a highly reflecting mirror means;
- (b) means mounting said mirror means for interception and redirection of a high power beam of radiation;
- (c) transducer means acoustically coupled with said mirror means for detecting stress waves induced in said mirror means by a high frequency signal in the incident beam.
Apparatus for detection of a selected characteristic of a beam of electromagnetic radiation, comprising:
- (a) a mirror assembly having a front surface and a back surface;
- (b) a highly reflective coating on said front surface for reflecting a high power beam of radiation;
- (c) a recess in said back surface;
- (d) means operably associated for interception and redirection of a high power beam of radiation and for forming with said recess a cooling chamber;
- (e) transducer means positioned within said chamber and acoustically coupled with said mirror assembly for detecting stress waves induced in said mirror assembly by a high frequency signal in the incident beam;
- and,
- (f) means for supplying and for removing a coolant fluid from said chamber.
4 more elements
Dependencies are inferred from the claim text.