Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1988-09-26
1990-03-06
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
350 9612, H01J 516
Patent
active
049068377
ABSTRACT:
An optical sensor for monitoring the motion and/or position of a moving element. One preferred embodiment of the optical sensor (50) includes a soda lime silicate glass substrate (52) in which a plurality of transmit waveguide channels (54), (56), and (58) are formed by an ion diffusion process. The waveguide conveys light pulses to a plurality of read ports (60), (62), and (64) through which the pulses are emitted to illuminate reflective areas formed on the surface of an adjacent moving element (59). Pulses of light reflected back from the reflective areas re-enter the read ports, propagating in the opposite direction through combination transmit/receive portions of the optical waveguide channels (72), (74), and (76), combining in a common receive waveguide channel (78). The reflected pulses are conveyed through a receive optical fiber (80) to a fiber-optic receiver (170), where they are converted to electrical pulses, which are decoded to provide an indication of the speed and/or position of the moving element.
REFERENCES:
patent: 2881976 (1959-04-01), Greanias
patent: 3334538 (1967-08-01), Steinhausen
patent: 3576430 (1971-04-01), Fickenscher et al.
patent: 3585396 (1971-06-01), Ferguson et al.
patent: 3728521 (1973-04-01), Borough et al.
patent: 3786238 (1974-01-01), Heisner
patent: 3792239 (1974-02-01), Ohlhaber et al.
patent: 3911270 (1975-10-01), Traub
patent: 3953730 (1976-04-01), Henry et al.
patent: 4120588 (1978-10-01), Chaum
patent: 4128759 (1978-12-01), Hunt et al.
patent: 4185256 (1980-01-01), Scifres et al.
patent: 4318058 (1982-03-01), Mito et al.
patent: 4356395 (1982-10-01), Miller
patent: 4379225 (1983-04-01), Apothaker
patent: 4384038 (1983-05-01), Khoe et al.
patent: 4418980 (1983-12-01), Keil et al.
patent: 4468085 (1984-08-01), Papuchon et al.
patent: 4480179 (1984-10-01), Schaefer et al.
patent: 4579417 (1986-04-01), Ih
patent: 4637681 (1987-01-01), Yamamoto et al.
patent: 4737624 (1988-04-01), Schwarte
M. Izutsu et al., "Optical-Waveguide Micro-Displacement Sensor," Aug. 1982.
K. Forrest et al., "Channel Waveguides in Glass via Silver-Sodium Field-Assisted Ion Exchange," Feb. 1986.
Doneen Patrick M.
Lindberg John M.
Nelms David C.
The Boeing Company
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