TRIP REPORT ON VISIT TO (Sanitized)FACILITY (CONSULTATION ON PROTOTYPE LIGHT TABLE)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A000600030007-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 8
• Document Creation Date: December 28, 2016
• Document Release Date: September 26, 2005
• Sequence Number: 7
• Publication Date: September 23, 1965
• Content Type: MF

au
r Approved For Relea 2005/11/21 :'C1A-RDP78B04770A00 030007-7
M/EB 349/65
23 September 1965
Copy
MEMORANDUM FOR: Chief, Imagery Analysis Division, CIA
THROUGH:
FROM:
SUBJECT:
Acting Chief, Missiles/Electronics Branch, IAD
Trip Report on Visit tol
(Consultation on Prototype Light Table
Facility
25X1
1. The undersigned was one of a group of three CIA personnel visiting
the 25X1
for the purpose of advising engineers regarding a prototype light 25X1
to le under development.
Personnel making the trip were:
2. The light table to be developed will use a light source similar to
a television tube which will produce a modulated electron beam. The spot size
will be 5/8 inch with a diffuser and 3/16 inch without the diffuser. The
modulation of light intensity will be accomplished by the feed-back principal.
The speed of the beam-scan and the modulation process will be so great that
perfect integration will take place in the mind/eye of the viewing analyst.
The purpose of the device is to vary the intensity of the light passing through
the transparancy, so dense portions receive more light and vice versa, using
the same principal used in the printer.
3. A wooden mock-up, constructed by Dengineers, was useful during
discussions which resulted in a number of suggestions for design improvement.
Attachment 1 is an impression of the wooden mock-up seen during this visit.
Viewing microscopes were aot attached to the wooden mock-up and therefore are
not shown.
4+. Description and Proposed Use:
a. The central. unit (Annotation A) would tilt up to any desired
degree, up to approximately 45 degrees. This movement would be motor driven.
The viewing turntable (Annotation B) is rotated so the supply spool brackets
are adjacent the film load access doors (Annotation E). The roll of film
would then be loaded and threaded part way through the viewing area. The
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SUBJECT: Trip Report on Visit to
(Facility (Consultation on
Prototype Light Table)
M/EB 3+9/65 25X1
turntable would again be rotated until the take-up spool was adjacent the
access door. The film threading operation would then be completed.
b. An X-Ray safety glass would come down over the viewing area
before the unit could be turned on.
c. The film transport would be motor driven and manually controlled.
d. The viewing microscope is to be attached firmly to the central
unit, not the viewing turntable.
e. The turntable can be rotated during viewing operations to
orientate the film as desired.
f. A small opening (Annotation D) provides direct access to the
film for marking purposes without the need to raise the X-Ray protective
glass cover on the viewing area.
5. The following suggestions for design improvement were made:
.a. The central unit should be capable of erection upward beyond
a 15 degree angle to increase viewing comfort for the analyst. .
b. Provision be made for loading and driving two rolls of 70 mm
film in addition to larger sizes.
c. Provision be made for chipping film. (The engineers believed
this could be accomplished by lifting the X-Ray protective glass, inserting
a "cutting glass" under the film, which then automatically turns on a non- -r0 rUQb
X-Ray light for the cutting operation.) 6W CRT
d. Installing elbow rests on the central unit, and provision of
a chair which has adjustable height, good body contour, and a back with
adjustable position and tension.
e. Provision for handy placement of control knobs.
9
f. Provision for-`very fine manual movement of film with finger-
tip control.
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SUBJECT: Trip Report on Visit to
Facility (Consultation on
Prototype Light Table)
M/EB 349/65
g. Provision for two reference lines (with controlable spacing),
or a rail for the scope to facilitate systematic search operations.
h. Provision for a magnetized map/photo/collateral board on top
of the central unit. This board to be adjustable so it is at right angles
to line of sight.
i. Provision for use of a legal size sketch or writing pad to
right or left of the viewing area.
j. Provision for the maximum amount of metalic surfaces to permit
use of magnets.
k. Provision for side-by-side operation, by placement of electronic
equipment units (,Annotation F) all to one side and stacked to save space.
1. Use of a high quality zoom monoscopic viewing microscope.
n. Design of a cut-down tube magnifier to permit film, scan while
X-Ray glass covers the film. The tube should have a "frying-pan" handle to
permit holding it without smudging eyeglasses.
6. Conclusions and Recommendations:
a. It is believed the light table may find primary applicability
for scanning relatively large scale photography (due to the large spot size
of the electron beam). However, its usefulness in viewing smaller scale
material should be investigated. This is the reason a suggestion regarding
use of 70 mm film was made. The requirement for stereo viewing must be re-
cognized in the design of any light table.
b. The relatively large spot size of the equipment now under de-
velopment will provide some image enhancement and prevent eye strain when
viewing areas with high contrast and widely varying surface reflectivity,
however, it is believed thatfiber optics may provide a much greater step
forward in the improvement of photo analysis capability, through the use of
25X1
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 Approved For Releas005/11/21 :CIA-RDP78B04770A0006ib"'030007-7
SUBJECT: Trip Report on visit to
Facility (Consultation on
Prototype Light Table)
11
M/EB 3+9/65
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a much smaller spot size. At the present time, the photo anlayst is faced
with the problem of unconscious density integration where density changes
are very subtle and close together. Isodensity traces are being produced
in an attempt to get additional intelligence information out of the material,
but the isodensity trace technique requires much advancement before it becomes
widely used. The time presently required to produce a trace and then to in-
terpret the resulting patterns is a big drawback. The development of a mod-
ulated light source to amplify/modulate the subtle density difference, using
fingertip control, might provide the means for increasing analysis capability
equivalent to a substantial increase in system ground resolution.
c. There is a lack of unanimity among photo analysts regarding
the relative ualit of the =Zoom.70 equipment, compared with the 25X1
states that the P.I.`s in PAG did not like the 25X1
and preferred the Zoom 70. The opposite is true in IAD. For monoscopic
viewing, we feel the uis superior to the Zoom 70, and it is an ideal
companion to the news High Power Stereoviewer, commonly referred 25X1
to as the Dynazoom. The has a superior zoom mechanism, a higher
magnification capability, and superior light systems to that of available
Zoom 70 equipment. It is recommended that an objective and scientific tes o
optical quality be made to determine which of the two has better. lens systems.
Equipment used in future P.I. equipment should be of the highest quality,
and there should be no compromise on this score.
25X1,
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. -49/65
IP- 'R SSION OF TIC, , Q ELECTRON B:-:AM I DUL TED LIGHT PROTOTYPE FILM VIEWER
(~%.s seen at I Ion 15 Sep 65)
Vicwirg unit. Elevation angle adjustable/motor driven.
Viewing unit turntable with 360 degree swivQ1
Viewing areQ covered with X-ray protective g1asi.
Openir to permit marking film.
Film loading access doors.
Electronic Equiprncnt.
25X1
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` ` _ ATTACH. 1
 REPLY REQUESTED
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FORM
SECRET
5 .81 1831
 Approved For Release 2005/11/21: CIA-RDP78BO477OA000600030007-7
10 MAR 1967
25X1
25X1
Assistant General Counsel
Central Intelligence Agency
Washington, D. C. 20505
Re: Patentability of a "Video Feedback System
for Enhancing Fine Detail"
Pursuant to your request, this office has conducted a novelty search
for the subject disclosure. The disclosure uses a mixture of fast (UV)
phosphors with slow bright phosphors such as P-4 on the face of a 3 inch
kinescope with a fiber optic face plate. A wide band delay line is used
to augment the system delay to allow time to scan each line twice. This
arrangement increases the detail contrast over a small area. The UV and
Pennsylvania. Accordingly, no novelty can be claimed in their use in this
disclosure.
P'-4 phosphors have already been developed by another
A search of the delay line system was made in the United States Patent
Office in Class 178, subclasses 7.1 through 7.8.
The following patents, copies inclosed, one of interest:
Patent No.
Inventor
Date Issued
Class/subclass
2,929,870
W. G. Gibson et al.
Her 22, 1990
178
7.1
2,971,053
W. G. Gibson
Feb 7, 1961
178
7.1
2,957,042
W. G. Gibson et at.
Oct 18. 1960
178
7.1
The Ginn (870) patent teaches the technique of delaying the video
signal for that time required to scan two lines.
an application.
In view of the foregoing this office does not recomme'di the filing-of
Sincerely yours,
Signed
44. Patents listed tinier, Patents Division 108 ) U lael
1. Invention disclosure Lt Colonel, JAGC
4 IncI
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