Methods of and system for aligning a device with a reference tar

Details Methods of and system for aligning a device with a reference tar Methods of and system for aligning a device with a reference tar

1980-08-29

1982-06-01

Truhe, J. V.

Electricity: motive power systems

Positional servo systems

'sampling' systems including miscellaneous 'sampled data'...

318640, 356400, 250548, 250561, 250211J, G05B 2102

Patent

active

043330444

ABSTRACT:
In the process of aligning an image sensor (33) with a datum mark (23) on an artmaster (21), each of a plurality of elements of the sensor accumulate a charge based on the level of light sensed. The elements of the sensor (33) are repetitively scanned to obtain data pulses relating to the charges on the elements as an indication of the level of sensed light. Data pulses from selected elements of the sensor (33) are counted and compared to develop a signal representative of, and to facilitate visual indication of, the alignment or misalignment of the sensor (33) and the datum mark (23). If the sensor (33) and the datum mark (23) are misaligned, the developed signal facilitate control of servo motors (28 and 29) to move the sensor (33) into alignment with the datum mark (23). Data pulses derived from all elements of the sensor (33) are used to facilitate an electronic reproduction on a display board (40) of the position of the datum mark (23 ) relative to the sensor.

REFERENCES:
patent: 3739247 (1973-06-01), Yamaguchi et al.
patent: 3843916 (1974-10-01), Trotel
patent: 4012148 (1977-03-01), Marantette et al.
patent: 4070117 (1978-01-01), Johannsmeier et al.
patent: 4153367 (1979-05-01), Lietar et al.
patent: 4153371 (1979-05-01), Kolzumi et al.

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