Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1991-10-08
1993-07-20
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250551, 359110, G02B 2700
Patent
active
052295931
ABSTRACT:
A free space laser communication system operates at two power levels. The system includes a microprocessor to control the laser output beam to a safety level when the input beam indicates that the output beam is not being received at the remotely positioned terminal. If the output beam is not being received by the remotely positioned terminal, a blockage or misalignment of the beam is indicated. During normal operation when a blockage or misalignment of the beam is not detected, the output beam may be operated at a level higher than a safety limit to thereby provide enhanced communication performance.
REFERENCES:
patent: 4449043 (1984-05-01), Husbands
patent: 4543477 (1985-09-01), Doi et al.
patent: 4598198 (1986-07-01), Fayfield
patent: 4663520 (1987-05-01), Tanaka et al.
patent: 4673795 (1987-06-01), Ortiz, Jr.
patent: 4687918 (1987-08-01), Hughes et al.
patent: 4812641 (1989-03-01), Ortiz, Jr.
patent: 4814628 (1989-03-01), Eichweber
patent: 4829596 (1989-05-01), Baring
patent: 4837428 (1989-06-01), Takagi et al.
patent: 4862397 (1989-08-01), Pryor
patent: 4879459 (1989-11-01), Negishi
patent: 4882774 (1989-11-01), Grotzinger
patent: 4902889 (1990-02-01), Sodi
patent: 4994675 (1991-02-01), Levin et al.
patent: 5069522 (1991-12-01), Block et al.
Snedaker, IBM Technical Disclosure Bulletin, Laser Shutdown and Bring-Up Procedure vol. 25, No. 2, p. 570; Jul. 1982.
International Business Machines - Corporation
Messinger Michael
Nelms David C.
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