Eye safety protection system for a laser transmission system whe

Details Eye safety protection system for a laser transmission system whe Eye safety protection system for a laser transmission system whe

1994-10-31

1995-09-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

21912162, G05D 2502

Patent

active

054517656

ABSTRACT:
An improved eye safety protection system for laser systems. The present invention measures energy returned along the optical axis itself. A beam splitter is installed in the optical axis and intercepts reflected energy back along the optical axis and passes the reflected energy to a photodetector which is used to measure the light scattered or reflected back along the emitting axis from the beam splitter. The output from the detector is passed to a comparator and regulation unit which adjusts the power level in the primary energy beam. Outgoing power can also be monitored.

REFERENCES:
patent: 4449043 (1984-05-01), Husbands
patent: 4543477 (1985-09-01), Doi et al.
patent: 4588885 (1986-05-01), Lovoi et al.
patent: 4678900 (1987-07-01), Nishioka
patent: 4687918 (1987-08-01), Hughes et al.
patent: 4737628 (1988-04-01), Lovoi
patent: 4876444 (1989-10-01), Field
patent: 4960988 (1990-10-01), Simms
patent: 5229593 (1993-07-01), Cato

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