Object distance measurement with improved resolution through ima

Details Object distance measurement with improved resolution through ima Object distance measurement with improved resolution through ima

1990-12-31

1992-07-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

356 1, G01N 2186

Patent

active

051325462

ABSTRACT:
In a system for locating one object relative to another where one object is referenced to an active beacon and the other object is referenced to a solid state imaging device, circuitry determines the centroid of the image of the beacon as imposed on the imager. In accordance with the invention, the beacon is operated successively at two different wavelengths and two different centroids are determined. Based on a priori knowledge of imager responses at the two different wavelengths, the location capabilities of the system are improved relative to that when only one wavelength is utilized.

REFERENCES:
patent: 4916302 (1990-04-01), Sorimachi
patent: 4923303 (1990-05-01), Lutz

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