NASA NTRS · 19870000383
Electron-Focus Adjustment for Photo-Optical Imagers
Abstract
Internal electron focus made independent of optical focus. Procedure enables fine tuning of internal electron-focusing system of photo-optical imager, without complication by imperfections of associated external optics. Applicable to imager in which electrons emitted from photocathode in optical focal plane, then electrostatically and/or magnetically focused to replica of image in second focal plane containing photodiodes, phototransistorss, charge-coupled devices, multiple-anode outputs, or other detectors.
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Fowler, Walter B., Flemming, Keith, Ziegler, Michael M.. 1987-09-01. Electron-Focus Adjustment for Photo-Optical Imagers. https://ntrs.nasa.gov/citations/19870000383
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