Method and apparatus using weighted range signal for controlling

Details Method and apparatus using weighted range signal for controlling Method and apparatus using weighted range signal for controlling

1980-10-06

1982-11-02

Rubinson, G. Z.

Optics: measuring and testing

Range or remote distance finding

With photodetection

354 25, 354 23R, 354 27, 354 33, 356225, G03B 7087, G03B 1320, G03B 718

Patent

active

043570836

ABSTRACT:
Method and apparatus are disclosed which direct a preliminary pulse of radiation from a selectively energizable light source toward a subject, and a device for evaluating the amplitude of the reflected pulse of radiation therefrom so as to determine a weighted range signal as a function of the amplitude of generally non-visible radiation frequencies selected for reducing the non-uniformity in reflectivity values of reflected visible radiation in the scene, which weighted range signal includes a reflectivity factor and a range factor. The reflectivity factor, which detracts from the range factor for focusing, significantly enhances exposure control under certain scene lighting conditions.

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