Optical encoder reading device

Details Optical encoder reading device Optical encoder reading device

1989-07-10

1990-09-04

Healy, Brian

Multiplex communications

Wide area network

Packet switching

350 9611, 350 9612, 350 9616, 350 9617, 350 9620, 350 9631, 350 9634, 370 1, 370 4, 341 14, 250570, 25023118, G02B, G02B, G01D 534, G06K 710

Patent

active

049539337

ABSTRACT:
Disclosed is an optical sensor readhead (10) which includes a glass substrate (14) that contains buried ion diffused optical transmission channels (12) for supplying light to and receiving reflected light from optical encoder bands (22) of an optical encoder (20). In the disclosed arrangements, each optical transmission channel (12) is associated with a specific optical encoder band (22) and includes fourteen spaced apart optical waveguides (36) which are located along one edge (18) of the substrate (14) and which are dimensioned and positioned to supply light to and receive light from the associated optical encoder band (22). Located at the oppositely disposed edge (16) of the substrate (14) are input and output optical waveguides (40, 42, and 44), which couple optical energy into and out of the optical transmission channel (12). Intermediate the optical waveguides (36) and the input and output waveguides (40 and 42) is an optical mixer section (38), which is in optical communication with the optical waveguides (36) and the input and output optical waveguides.

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