PROPOSAL FOR A STUDY AND EXPERIMENTAL INVESTIGATION OF ELECTROPHOTOGRAPHIC TECHNIQUES (Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A000600010012-3
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: July 30, 2004
• Sequence Number: 12
• Publication Date: May 26, 1965
• Content Type: LETTER

Approved For Release 4UJItJJJLNIIMI0/i1600600010012-3
,
May 26, 1965
25X1
25X1
25X1-
25X1
I
F. U. ox 6788
Fort Davis Station
Washington, D. C. 20020
Subject: Proposal for a Study and Experimental Investigation
of glectrophotoiwaybi " chniques
I
In confirmation of discussions held with your technical
people on 21 May 65 we are submitting herewith additional technical
information which will serve as clarification of the subject pro-
posal which was submitted to you with our letter of 25 March 65.
The first document is an expansion of the work statement as not
forth in the original proposal and the second document is a tech-
nical discussion of Imagery Aspects of the Electrophotographic
Process. These two additional documents, together with the origi-
nal submission, and the information contained in this letter,
constitute the entire 0 proposal.
During the recent discussions, additional information on
certain aspects of the proposal were requested by your technical
people. This information is set forth below.
The following is an estimate of the signal-to-noise ratio
performance of the electronic ceasing as described in Section
III of
Neglecting film granularity, for the moment, and assuming a
density range of 2.0 on the film to be copied, 36db or greater
peak-to-peak signal to rms noise ratio can be expected. Now con-
sider 80132 film having a granularity of 0.023 (as measured by a
NGA Review Complete
THIS MATERIAL CONTAINS INFORMATION AFFECTING
THE NATIONAL DEFENSE OF THE UNITED STATES
WITHIN THE MEANING OF THE ESPIONAGE LAWS.
.TITLE 18, U. S. C., SECTIONS 793 AND 794, TH
TRANSMISS
ION OR REVELATION OF WHIC N
MANNER TO AN UNAUTHORIzEq eXA1 e,
$Y LAW:
TIA14770
I
GROUP I EXCLUDED FROM AUTOMATIC
20 DECLASSIFICATION
25X1
Dear Sir:
 pprove or a ens
A7L06000b0013Y 65
24 micron uniformly illuminated aperture) being scanned by a 2
micron ussian spot.
The resulting S/N will be about 20db. This
.~ ,.. -
ignel input t thi
oe
processng amplifiers. A portion of the
processing involves threshold limiting of the si
al
d
gn
an
ion to clipped pulse form. By this device, low amplitude
411 ....0. b
?- - - - - -
e
noise will be exaggerated. Whether increased si
nal
g
,.
a F
tial frequencies, resulting on the modified copy will out-
r'equency conponentts, when viewed at low pour magnification,
ouventio al copy,
witA regard frequency analyser, Section Ip of 0 25X1
granu rt
y
e will be more
i
ron
d
no
s
p
ounce
,
S' of about 1? db is
expected. possible that this
might be increased by integration techniques, in a mannor
of Superimposed oscilloscope traces of a noisy repetitive
ant signal.
Knowledge obtained in the construction and o
erati
f
h
p
on o
t
e
eadboard electronic film reproducer, and of the modulated li
ht
g
source for the *I*ctr ographic techniques study, Section II of
should provide a sound basis for develop.
sett of a high speed, high resolution automatic dodging printer.
With present knowledge it appears that, using contact printing (and
wehave made contact prints with limiting resolution well beyond
400 cycles per millimeter),, and with the expectation of a solution
to the problem of operation without an anti halation backing, such
a printer can be developed which will provide a capability of better
than 200 cycles per millimeter, a printing speed of 40cm2/sec, and
automatic dodging at spatial frequencies up to 10 cycles per milli-
meter.
The light box required in the electrophotographic technique
study was also discussed with your people and it appears as though
it may be possible to furnish this to 0 as Ght. Should this not
"-
h
t
e case we would atiihh
,ncpate tat te Goverment would allow
expense against the contract.
Approved For
D
t4jTIAIB04770A0006000 10012-3
25X1
 2 A000600010012-3
Should additional information be required -lease contact the
undersigned at area code
Very truly yours,
25 Way 6
25X1
Original Signed By
Marketing presentative
Statement Modification (4 copies)
Epy No. 7 through 10
Dated 20 May 65
A Discussion of Some Imagery
Aspects of the 91ectrophotographic
Process Dated 20 May 65 (4 copies)
25X1
Approved For R / 4770A000600010012-3
 Approved For Rase 2004/08/25 : CIA-RDP78B04770RIZ0600010012-3
23 April 1965
STUDY OF TECHNIQUES FOR IMPROVING IMAGE PERCEPTIBILITY
Some Specific Questions to be answered:
1. Can degraded recorded images be restored? (by "degraded image" is
meant an image with any individual properties other than those exhibited by
the original object)
a. By what means?
(1) theoretical
(2) practical
b. To what degree?
(1) of sensitivity
(2) of resolution
2. What modification in image appearance improves perceptibility?
a. Without retraining the observer.
b. With retraining the observer.
3. What are the limitations of image modulating processes with
respect to MTF and SIN ratio?
a. theoretical
b. practical
(1) High-speed, high-performance, roll film contact printer.
4. What are the differences in the processing requirements for static
and dynamic viewing:
Approved For Release 2004/08/25 : CIA-RDP78B04770A000600010012-3