Displacement sensor and positioner

Details Displacement sensor and positioner Displacement sensor and positioner

1991-06-25

1993-01-12

Howell, Janice A.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 1, 2502014, G01C 300

Patent

active

051792877

ABSTRACT:
The invention provides a displacement sensor comprising a light-emitting element for projecting a detection light towards an object in a substantially perpendicular direction, a condensing element for condensing a reflected light from the object, and a position sensitive device with its light-receiving surface disposed in parallel with the axis of the detection light. A positioning apparatus employing the above displacement sensor is also disclosed.

REFERENCES:
patent: 4589773 (1986-05-01), Ido et al.
patent: 4884888 (1989-12-01), Butefisch
patent: 4971443 (1990-11-01), Koyagi
patent: 5024529 (1991-06-01), Svetkoff et al.

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