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RESEARCH IN ADVANCED PHOTOELECTRIC INFORMATION STORAGE
WESTINGHOUSE ELECTRIC CORP BALTIMORE MD
Improvements of the tape storage camera tube increases the resolution from 40 to 75 line pairs per millimeter for small rasters at 5 response. Response curves showing 60 line pairs per millimeter at 10 response were measured. No grating disturbance or any effect of grating orientation was observed. The hard copy film photo of the display kinescope showed 23 line pairs per millimeter retina dimension resolution, 8 shades of gray resolvable by the eye, and a contrast of 80 percent. When the stored picture was underscanned by 18X to show only the AF test pattern, 64 line pairs per millimeter were resolved. Photodiodes were made to test the image section operation. Aperature response curves had a 5 response of 98 line pairs per millimeter, which when corrected for the aperture response of the lens became 220 line pairs per millimeter. A technique was developed for measuring the aperture response curves of lenses and image displays. Studies indicated that a mechanical means harmonic drive may be the best for smooth tape drive.
Final rept., June 1962-July 1963
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