Pixel placement sensing arrangement using split detecting elemen

Details Pixel placement sensing arrangement using split detecting elemen Pixel placement sensing arrangement using split detecting elemen

1986-02-14

1987-09-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250236, 358293, H04N 104

Patent

active

046941568

ABSTRACT:
A pixel placement sensing arrangement, useable in a spatial synchronization system, having a split photodetector, RC integrating circuits having time constants long relative to the exposure time of the photodetector connected to the respective halves of the split photodetector such that the current accumulated in the capacitors of the integrating circuits results in voltages proportional to the respective exposures of the halves of the photodetector, and a different amplifier which provides an output reflective of any difference in said voltages.

REFERENCES:
patent: 4195316 (1980-03-01), SanSome
patent: 4204233 (1980-05-01), Swager
patent: 4320420 (1982-03-01), Rider
patent: 4349847 (1982-09-01), Traino
patent: 4441126 (1984-04-01), Greenig et al.
patent: 4614866 (1986-09-01), Liss et al.

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