Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1989-09-21
1991-04-02
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
2502311, H01J 516
Patent
active
050049127
ABSTRACT:
The invention relates to a fiber-optical sensor, comprising a light transmitter device (6) which couples transmitted light into at least one first ligthwave conductor (3,4) and also comprising a light receiver device (7) which receives light from the first lightwave conductor and at least one second lightwave conductor (4,3). The lightwave conductors (3,4) comprise adjacently situated portions (1) which can contact one another in a light-transferring manner at given areas and which are accommodated together in an envelope (5) at this area, a force or a pressure being applied to the lightwave conductor via said envelope. The light transmitter device (6) also couples a first transmitted light into the first lightwave conductor (3,4) and a second transmitted light into the second lightwave conductor (4,3).
REFERENCES:
patent: 4342919 (1982-08-01), Brogardh
patent: 4591709 (1986-05-01), Koechner et al.
patent: 4607162 (1986-08-01), Sai
patent: 4634858 (1987-01-01), Gerdt et al.
patent: 4775216 (1988-10-01), Layton
Kordts Jurgen
Martens Gerhard
Weidinger Georg
Bartlett Ernestine C.
Le Que Tan
Nelms David C.
U.S. Philips Corp.
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