Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1974-06-14
1976-03-16
Borchelt, Archie R.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250203R, H01J 3912
Patent
active
039448142
ABSTRACT:
There are provided a plurality of light receiving elements arranged at a predetermined spacing therebetween to be irradiated by a light beam, a plurality of logical product circuits, each being provided for a pair of adjacent light receiving elements and connected thereto to receive the detection outputs thereof for producing an output only when the pair of adjacent light receiving elements are irradiated at the same time, and a detection signal selection circuit connected to respond to the detection outputs of the irradiated elements and the output signals from the logical product circuits for selectively gating out one of the detection outputs and the output signals of the logical product circuits which indicate the centers of the irradiated positions, thereby accurately detecting the center of the irradiated position.
REFERENCES:
patent: 3303347 (1967-02-01), Wingate
patent: 3532892 (1970-10-01), Murphy
patent: 3640628 (1972-02-01), Jones
patent: 3649122 (1972-03-01), Holtz
patent: 3697760 (1972-10-01), Biet et al.
patent: 3709609 (1973-01-01), Spengler et al.
patent: 3742222 (1973-06-01), Endl
Borchelt Archie R.
Kabushiki Kaisha Komatsu Seisakusho
Nelms D. C.
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