Solid-state optical position determining apparatus

Details Solid-state optical position determining apparatus Solid-state optical position determining apparatus

1987-04-28

1989-04-11

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

178 18, 250221, 341 13, 341 31, G01B 1100, G01B 1103

Patent

active

048200506

ABSTRACT:
An optical position determining apparatus for detecting radiant energy reflected from a target zone includes an emission device for generation and emission of radiant energy, a device for redirecting radiant energy across the target zone, a reflecting device for reflecting the radiant energy back from the target zone, and a detector device for sensing the presence of radiant energy reflected from the target zone. The emission device is stationary and emits a beam of radiant energy toward the redirecting device, which redirects the radiant energy along a primary beam path. The redirecting device also is configured for permitting a return beam of light from the target zone to impinge upon the detector device, which is located therebehind with respect to the direction of travel of the return beam. The detector device includes a CCD (charge coupled device) linear sensor formed of a plurality of sensor elements. The sensor elements are pulsed in successive order for scanning the target zone for the presence of the reflected radiant energy and for producing an electrical signal in response to the presence of such reflected radiant energy.

REFERENCES:
patent: 4507557 (1985-03-01), Tsikos
patent: 4553842 (1985-11-01), Griffin
patent: 4558313 (1985-12-01), Garwin et al.

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