Radiant energy – Photocells; circuits and apparatus – Housings
Patent
1993-01-13
1995-03-21
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Housings
372 36, H01J 502
Patent
active
053998588
ABSTRACT:
A photo-semiconductor module includes a laser diode for emitting a laser beam, a lens and a photo-detector arranged in a casing so as to be optically coupled to each other. The laser beam, emitted from the laser diode, travels through the lens and exits the casing, and the photo-detector detects at least a part of the laser beam and outputs a detection signal used for controlling the laser diode. The laser diode and the lens are mounted on a first structure and thermally coupled thereto and the first structure is mounted on and thermally coupled to a cooling-element, thereby to cool the laser diode by conducting heat coupled therefrom and through the first structure to the cooling element. The photo-detector is mounted on a second structure which is thermally isolated from the cooling-element.
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Fujitsu Limited
Nelms David C.
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