TRIP REPORT - 6 DECEMBER 1963

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001500020040-0
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 28, 2016
• Document Release Date: February 13, 2002
• Sequence Number: 40
• Publication Date: December 11, 1963
• Content Type: MF

Approved For,$elease 2002/QL1.7- bIA-RDP78B047o001500020040-0
11 December 1963
MEMORANDUM FOR: Chief, Development Branch
SUBJECT Trip Report - 6 December 1963
?
2. Purpose
25X1A
The purpose was to review the results of the Phase I effort of the
25X1A titled "Ultra-High Resolution Virtual
Image Viewer", their proposal for Phase II, our own experimental work and
its possible application and the feasibility of designing and generating
diffraction gratings of the required nature which is to be used in the
40 contractor's particular approach to the problem.
3. Discussion
The discussion began with a review of events carrying through the sub-
mission of the Phase I final report and the proposal for Phase II.
The next topic was the diffraction grating and the restraints it im-
posed upon the virtual image viewing system.
The coherent data. processing technique outlined in the memorandum of
25X1A 31 October 1963 from II was discussed as a, possible basis of approach,
inasmuch as it equalized diffraction order intensity in a. manner different
from that proposed. The discussion concluded that the difficulties of
using a coherent system were greater than those which would be encountered
in developing the diffraction gratings. The conclusion that the diffraction
grating development should be undertaken also proceeded from the fact that
it was felt that only seven orders would be required - not the original
seventeen. This reduced the problem by nearly an order of magnitude, and
the conclusion of feasibility made much easier to accept.
DECLASS REVIEW by NIMA/DOD
Approved For Release 2002(1L74IA-RDP78B04747A001500020040-0:,:
 Approved Fo,lease 200210.6/17: tIA-RDP78B0470001500020040-0
2 5X1A The discussion was then returned to the diffraction grating. This
was chaired by He presented three approaches to the problem
of obtaining even illumination throughout the required number of orders to
be concerned with.
1. Shaped Groove Grating
2. The Ghost Grating
3. Tandem Gratings
The tandem grating was discarded since it imposed side effect problems.
2 5X1A There was no reservation concerning attaining the desired goal on the part
25X1A with a parallel effort on the #host grating. He estimated that one to two
months would be required to make calculations and determine the experimental
direction. Since the ruling tool is of paramount importance it would take
four to six months to design and manufacture it properly. The next step
would be to rule two inch squares and evaluate. Several gratings would
have to be generated. In eight to nine months a. 10 inch square could be
ruled and replicas made. These would be the ultimately desired gratings
for the viewer. The whole effort would be accomplished in 8- months from
go-ahead and would cost in the neighborhood of a minimum of II and not
25X1A
recommended pursuing the shaped groove grating primarily
25X1A
The discussion returned then to the logical approach to be taken for
the Phase II effort. This summarizes those points:
1. Magnification as a goal of 100X, presently required 50X in
steps of 12, 25 & 50X or zoom through this range. No effort was to
be applied to designing a, zoom lens but use those fixed magnifications
available. The experimental engineering model (breadboard) is to
have a least 25X as maximum.
2. To begin design and construction of the experimental engine-
ering model and allow, after construction, the contractor/s to retain
and conduct experiments upon it prior to delivery of the designed
grating. This would require utilization of commercial gratings.
Evaluation would be performed after delivery of the developed even-
ordered-illumination grating prior to delivery to the Development
Staff.
3. The Development Branch would then accept delivery of the
experimental engineering model and evaluate it before a, finalization
of design for a prototype working instrument.
Approved For Release 2002/06117 -: CtA@ RDP78B04747A001500020040-0
 Approved For elease 2002/06/1T Cff-RDP78BO47WO1500020040-0
4. Conclusions
After again viewing the breadboard optical bench demonstration for
Phase I effort it became more conclusive that this approach was par
excellence and should be pursued immediately.
25X1A The contents of paragraph 3 above should be the foundation for
soliciting for a. revised proposal.
25X1A
The should be requested to re-submit a, proposal
? `?~"++6 "++`- -'-.iuc~ vi k'iic I-L-L O,LW7b1U11, SUUC,Uill,.CcleL LL1g TO I
for the optical system and final overall system evaluation
25X1A
25X1A
for the development of the appropriate grating.
This proposal should be the ba.se for a, negotiated contract.
Exploratory Development Lab. Branch
25X1
25X1
Approved For Release 2002/06/17 : CIA-RDP78BO4747AO01500020040-0