HIGH RESOLUTION SCREEN OR UV EXCITED PHOSPHOR SCREEN

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001000060019-2
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: May 21, 2001
• Sequence Number: 19
• Publication Date: May 11, 1964
• Content Type: REPORT

0 STATINTL
Approved For rase 2001/08/13: CIA-RDP78B0470 1000060019-2
Declass Review by NIMA / DoD
May 11, 1964
'Ligh Resolution Screen or
UV excited phosphor screen
They have received the contract and have started work,
is proceding with the lens d sign which will
give good color correction for both 'JAI nd visual light.
His present approach is a catadioptric system in which
the first two surfaces are first surf ace mirrors for the
principal focusing, or image formation. Two low power
quartz lenses are then used as corrector plates to remove
residualep spherical deficiences without introducing any
chromatic errors of importance. The magnification is 13:1
which enlarges a 70 mm format to fill a'3011 by 3011 screen.
3efore completing this design, is reviewing the
literature to see if there other possib'e approaches which
would offer more.
is proceding with the orga, is phosphor work.
He is planning to investigate .Anthracen , Fluorene,
Fluorcene, Rubrene, biphenyl-cyclo-octatetraene, and
Umbelliferone. These materials are on order in small
sample lots and some of them have been received. The
material is usually in powder or crystalline form and
must be disolved. He axpects to suspend them in an
acrylic resin, so he must first deter:r.i e the proper
solvent and then determine whether theyjwill fluoresce
in the resin.
will do the inorganic coating investigations.
He will use zinc sulfide, Zinc Silicate, and Cadmium
Tungstate. Thes materials are on order.' There is some
competitive rivalry between as to
whether the organics or the inorganics ill prove to be
In order to get a fix on the life of thelphosphors,
they have had a sample of the material they were prev-
iously working with illuminated for several months.
There has been no noticeable decay.
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