NASA NTRS · 19730000361
Automatic focus control for facsimile camera
Abstract
Focus control performs function of automatically focusing facsimile camera throughout object field being scanned. It does this by determining and adjusting focus of imaging sensor accordingly. Since facsimile camera images a scene by scanning discrete strips, it is possible to have entire three-dimensional scene in perfect focus at point of imaging by use of focus control.
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Sinclair, A. R., Katzberg, S. J., Burcher, E. E.. 1973-10-01. Automatic focus control for facsimile camera. https://ntrs.nasa.gov/citations/19730000361
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