Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1992-08-06
1993-09-21
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250216, 250205, H01J 4014
Patent
active
052471675
ABSTRACT:
A multiple beam optical system includes a housing which contains a pair of laser diodes and a pair of optical detectors. The lasers produce overlapping beams of light. The housing includes a beam directing and reflecting member which selectively focuses light from one of the lasers to a corresponding optical detector located in the housing and selectively focuses light from the other laser to its corresponding optical detector located within the housing. The individual power of each of the overlapping laser beams is thereby monitored by the separate detectors.
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Bargerhuff Richard A.
Dickson LeRoy D.
Groot John
Rabedeau Melbourne E.
Zavislan James M.
Davenport T.
International Business Machines - Corporation
Millett Douglas R.
Nelms David C.
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