Coherent light generators – Particular component circuitry – Optical pumping
Patent
1998-02-09
1999-12-07
Healy, Brian
Coherent light generators
Particular component circuitry
Optical pumping
372 25, 372 29, 372 33, H01S 300
Patent
active
059995491
ABSTRACT:
A method and apparatus are provided for laser safety. A fault detector detects laser fault conditions and generates a laser fault control signal. A laser fault counter is coupled to the fault detector for counting laser fault conditions and for generating a disable laser control signal responsive to a predetermined fault count. A reset timer is coupled to the laser fault counter for identifying a predetermined reset time period responsive to the laser fault control signal and applying a reset signal to the laser fault counter. Features of laser safety method and apparatus of the invention are that the laser fault counter is reset if a second laser fault condition is not detected within the predetermined reset time period after the laser is turned on. The disable laser control signal is not generated when a safe laser optical power condition occurs between two laser fault conditions.
REFERENCES:
patent: 4262366 (1981-04-01), Eumurian
patent: 4685097 (1987-08-01), van der Put
patent: 4713819 (1987-12-01), Yoshikawa
patent: 4856011 (1989-08-01), Shimada et al.
patent: 4884275 (1989-11-01), Simms
patent: 5296695 (1994-03-01), Bardos et al.
patent: 5585605 (1996-12-01), Williams et al.
patent: 5665942 (1997-09-01), Williams et al.
patent: 5666045 (1997-09-01), Grodevant
patent: 5764666 (1998-06-01), Wakabayashi et al.
IBM Technical Disclosure Bulletin, vol. 33, No. 3B., Aug. 1990, pp. 90 and 91, and entitled Laser Fault Detection.
Freitag Ladd W.
Siljenberg David Warren
Thatcher Raymond Jonathan
Healy Brian
International Business Machines - Corporation
Pennington Joan
Truelson Roy W.
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