Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1981-01-28
1982-09-14
Britton, Howard
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
33286, 244 313, 244 316, 250203CT, 250215, 356152, 356153, H04N 718
Patent
active
043498388
ABSTRACT:
The system makes it possible to accurately align the laser emission axis with that of the video image sensor by using a point light source and an associated focusing optical system. External reception is interrupted during the alignment phase. The system tracker measures the errors at X and Y of the image of the source formed on the sensor. The latter is rotated to occupy a plurality of predetermined successive angular positions. An electronic control and calculating system supplies, on the basis of successive error data, sweep correction signals at X and Y making it possible to control the center of the image coinciding then with the invariable point of the image corresponding to the rotation axis.
REFERENCES:
patent: 4155096 (1979-05-01), Thomas
"Thomson-CSF"
Britton Howard
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