IMPROVED SCREEN FOR REAR PROJECTION VIEWERS

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A001900010111-1
• Release Decision: RIFPUB
• Original Classification: C
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: September 6, 2012
• Sequence Number: 111
• Publication Date: July 19, 1966
• Content Type: MISC

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Declassified and Approved For Release 2012/09/06: CIA-RDP79B00873A001900010i-171 16
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ABSTRACT
IMPROVED SCREEN FOR REAR PROJECTION VIEWERS
This report updates the progress of our investigations of
Corning Glass Works materials, for applications in rear pro-
jection screens. Special alumina-magnesia materials have
been requested, as have samples of glass-ceramic and some
photo-sensitive glasses.
Reduction of the measured scattering data is discussed. An
analysis is presented of the treatment of scattering data
to be taken during the future experimental phases of the
program. It is proposed that scattering data be normalized
to a spherical isotropic radiator which has the same amount
of incident power rather than to the power scattered into
the forward hemisphere. It is argued that this leads to the
most meaningful evaluation of screen performance.
The status of the instrumentation we are fabricating is
given along with some preliminary data taken on the resolving
power of a rear projection screen. The goniophotometer is
complete except for routine calibration procedures. The
modulation transfer function analyzer requires completion of
the sine-mask and "contrast computer?. Objectives for next
period and approaches to the various problems are outlined.
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Declassified and Approved For Release 2012/09/06: CIA-RDP79B00873A001900010111-1