Optical transducer

Details Optical transducer Optical transducer

1981-11-13

1983-07-19

Little, Willis

Geometrical instruments

Miscellaneous

Light direction

33 1PT, 33125A, 357 74, G01B 1100, G01B 1126

Patent

active

043935915

ABSTRACT:
An optical transducer for determining the angular position of a rotating member relative to a fixed structure, comprises a notched disc 13 rotatable inside a support housing 12, a light emitter 18 and a plurality of photovoltaic cells 19 for detecting the passage of light through the disc notches. The active and passive elements of an electronic circuit connected to the photovoltaic cells are carried by a single ceramic plate 21, which also acts as a support for the cells 19. The circuit comprises trimming resistors in the form of films deposited on the ceramic plate and connected to the amplifiers by the photovoltaic cells. In order for the signals generated by the amplifiers to have constant, predetermined peak values, the values of the resistors are trimmed during the production stage by means of a laser which selectively burns away parts thereof. The ceramic plate 21 is cemented on to the transducer housing 12, which is then positioned on the laser apparatus. The operations involved in presetting the resistors is carried out with the transducer in operation, and the laser need only be focused and pre-positioned once for the entire circuit.

REFERENCES:
patent: 2944157 (1960-07-01), McAuslan et al.
patent: 4040092 (1977-08-01), Carnes
patent: 4122479 (1978-10-01), Sugawara et al.
patent: 4218701 (1980-08-01), Shirasaki

Affiliated with

Also associated with

Rating

Optical transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical transducer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-744827