Arrangement for increasing the dynamic range of optical inspecti

Details Arrangement for increasing the dynamic range of optical inspecti Arrangement for increasing the dynamic range of optical inspecti

1982-12-03

1985-08-06

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250578, H01J 314

Patent

active

045338280

ABSTRACT:
An arrangement of partially reflecting mirror surfaces to extend the dynamic range of area sensor arrays as used in optical measurement systems. An instantaneous optical AGC allows a single area sensor to be used in inspection systems where surface reflectivities and characteristics may vary from diffuse to mirror-like. The partially reflecting mirrors instantaneously superimpose on the area sensor a set of spatially displaced energy related images of the inspection pattern. Electronic readout of the sensor and subsequent data processing allows selection of portions of each image which represent the linear non-blooming operating range of the sensor.

REFERENCES:
patent: T103801 (1984-01-01), Grant et al.
patent: 4141625 (1979-02-01), Pickar et al.
patent: 4272684 (1981-06-01), Seachman

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