Calibratable optical distance sensing system and method

Details Calibratable optical distance sensing system and method Calibratable optical distance sensing system and method

1994-11-07

1996-06-25

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

356243, 356 304, G01B 1114

Patent

active

055305482

ABSTRACT:
A calibratable optical distance measuring system (100) and method of calibrating the same utilizes a plurality of electronic calibration constants stored in memory (118) to compensate the measurement output of a position sensitive detector element (18) for variations in physical design and circuit performance parameters. The method of calibrating includes generating the plurality of electronic calibration constants by placing the optical distance measuring system (100) into a calibration fixture (200 or 208) where at least one target object is moved into known distances, and the calibration constants are determined based on the system's measurements of the known distances.

REFERENCES:
patent: 4375921 (1983-03-01), Morander
patent: 4682894 (1987-07-01), Schmidt et al.
patent: 4925308 (1990-05-01), Stern et al.

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