Optical displacement measuring apparatus

Details Optical displacement measuring apparatus Optical displacement measuring apparatus

1998-09-22

1999-11-30

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With light attenuation

33707, G01B 1100

Patent

active

059952296

ABSTRACT:
In an optical encoder having a reflection-type scale and a sensor head 1, the sensor head 1 is formed of a resin-molded block 10. The block 10 has a hole 15 opened to be opposed to the scale, and interconnection lines. In the hole 15, a light emitting device 20 is buried so as to irradiate the scale. A device substrate 30, on which a light receiving IC chip 32 is mounted for receiving the reflected light from the scale, is attached to the front surface of the block 10. The interconnection lines 12, to which the light emitting device 20 and the IC chip 32 are connected, are led to external circuits through an FPC substrate 40.

REFERENCES:
patent: 4340814 (1982-07-01), DiCiaccio et al.
patent: 4632559 (1986-12-01), Brunsting
patent: 4983828 (1991-01-01), Stephens
patent: 5028139 (1991-07-01), Kramer et al.
patent: 5109236 (1992-04-01), Watanabe et al.

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