Eye safety protection from high power laser light

Details Eye safety protection from high power laser light Eye safety protection from high power laser light

2007-11-29

2010-11-16

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C250S216000, C250S239000

Reexamination Certificate

active

07834302

ABSTRACT:
A laser safety device and method of protecting against harmful levels of radiation. The device includes a housing with first and second apertures. A photodetector generates a first signal corresponding to a level of radiation entering the housing through the first aperture. A control circuit receives the first signal and generates a drive signal based upon the level of the radiation. A reflector array which can include micro-electro-mechanical mirrors receives the drive signal and diverts a first part of the radiation away from an incident path extending from the first aperture to the second aperture. The reflector array allows a second part of the radiation to continue along the incident path at a safe level towards the second aperture. Optionally, the reflector array blocks the incident path so that substantially no radiation passes to the second aperture if unsafe levels are detected.

REFERENCES:
patent: 5729010 (1998-03-01), Pinkus et al.
patent: 6069352 (2000-05-01), Castracane et al.
patent: 2006/0060758 (2006-03-01), David et al.
patent: 1133514 (1968-11-01), None

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