Device for controlling the position of a first body relative to

Details Device for controlling the position of a first body relative to Device for controlling the position of a first body relative to

1974-02-01

1976-04-20

Stolwein, Walter

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250203R, 250209, 356 4, 244 316, H01J 3912

Patent

active

039522083

ABSTRACT:
An accurate and reliable device for controlling the position of a first body, of which the devices forms part, relative to a second body is described. The edge of the image of the second body is periodically moved over a row of radiation-sensitive detectors in a manner such that at most two detectors receive modulated radiation.

REFERENCES:
patent: 3353022 (1967-11-01), Schwartz
patent: 3535521 (1970-10-01), Levine
patent: 3790276 (1974-02-01), Cook et al.

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