COLLIMATION EXPERIMENT FOR 1540 LIGHT TABLES

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000200020141-0
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: February 17, 2004
• Sequence Number: 141
• Publication Date: June 2, 1970
• Content Type: MF

Approved fo Release 2004/03/29E MP78BOU71A000200020141-0
NPIC/TSSG/Pfl) _ 147 _ 70
2 June 1970
Chief, Systems Development lranch, 1 D/T991r,
Collimation Experiment for 1540 Light Tables
spite of the attainment of 310n foot lamberts on the
subject light table, in their present configuration the illumination
is marginal for :agnified viewing. The need for the development of
. -. . .___.__ 2- 1_.11__....1
Accordingly, there is a project in the P-71 THD Program for the
development of a tracking light source for these tables.
2. Another possibility for improving this situation that we
luld look into is the introduction of a collimating layer between
layer is to lather light and confine the reradiated illumination to
rrow distribution angle, say about 3O'. In order to
a relatively n
a
determine whether or not' a significant improvement in the illumination
for ma i fled viewing can be achieved by this technique without ruin-
ing the illumination system for direct viewing of the imagery, it is
r nested that your br .ncli design and monitor appropriate experiments
to this end. 1 suggest that the Advanced Technology ilranch may be
of -nsiderable assistance to you in this project.
3. The primary questions to be answered by the experiment, as
I see them, are as follows:
X, can a collimating system be developed for the 1540
ght tables that will significantly improve the illuminption
available for magnified viewing?
b. At reasonable cosh`
c. Without introducing artifacts in the image?
Without hampering the direct viewing capability of the
table?
4, There are a nurther of variables wMch bear upon these questions
c , the relationship between the acceptance angle and the re-
ietion an le., the distance from the collimating layer to the micro-
scope objective and plane of focus, the numerical aperture of the
i
ng
scope objective, the utilization of various auxiliary scatter
Declass Revie oYoved For Release 2004/03/2 ? iDP7
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Approved F4ppRelease 2004/03/CS
6 : A-RDP78B05y~1A000200020141-0
SUBJECT: Collimation Experiment for 1540 Light Tables
layers, and their relative placement in the system, etc. Por deter-
-
ables3 I leave to your judgment. It may be advisable to obtain
analytical support to more precisely define the oh jectives of
eriment before the experiment design is finalized.
1. believe there are a number of potential sources of suit-
able q~llimating materials to use in the experimentation. Some years
lieve I read about the development of such collimating
I bO
X1
X1
X1
.
layers but have been unable to relocate that material. lAS" is using
diferent purpose. Two possible sources arel 25X1
ra fo'ertce 'low Technology for April-May 1970, page 65; 25X1
talked with about the laterial and also the District
Department of III hrrays regarding their directional signal lights
which utilize a product.) Of course, there are probably others.
you have any questions regarding this assignment, do not hjsitat
discuss them with me.
ribut ion
I - TSSC/ICED/C
Original - Address
'1'$SG/RED/AT3/C
4/RED/SA
25X1
NPIC/TSSG/RED
ant for Pl s ti Applications, RED
(2 June 1970)
25X1
25X1
Approved For Release 200 J$EL fIA-RDP78BO5171A000200020141-0