Optical position detecting apparatus

Details Optical position detecting apparatus Optical position detecting apparatus

1993-06-11

1995-07-18

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356400, G01N 2186

Patent

active

054344255

ABSTRACT:
An optical position detecting apparatus detects a position level and inclination of a surface of an object to be detected without the need to increase the working distance of an objective optical system. The apparatus includes an objective optical system having a lens arranged to face the surface, an illuminating optical system for supplying a position detecting light beam from the periphery of the objective optical system, a photodetector for generating an electric output corresponding to a light beam received, a condenser optical system for converging a reflected light beam from the surface illumunated with the incident light beam from the illuminating optical system onto a photosensing surface of the photodetector, and a beam directing optical element for directing at least one of the incident light beam and the reflected light beam into an optical path passing through the lens.

REFERENCES:
patent: 4558949 (1985-12-01), Uehara et al.
patent: 5008705 (1991-04-01), Sindledecker
patent: 5048967 (1991-09-01), Suzuki et al.
patent: 5053628 (1991-10-01), Yamamoto et al.
patent: 5124562 (1992-06-01), Kawashima et al.
patent: 5268744 (1993-12-01), Mori et al.

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