DIRECT IMAGE VIEWER SECOND QUARTERLY REPORT 10/13/64 - 1/13/65

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001700010008-5
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 16
• Document Creation Date: December 28, 2016
• Document Release Date: April 24, 2001
• Sequence Number: 8
• Content Type: REPORT

Approved For Release 2001/05/11 : -CIA-RDP78B04747A00170001"0008-5
Declass Review by NIMA/DOD
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
STATOTHR
- No. 7506
DIRECT IMAGE VIEWER
Second Quarterly Report
10/13/64 - 1/13/65
Project 7506
STATOTHR
STATOTHR
Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
Page
I, PROGRESS SUMMARY . . . . . . . . . . 1
II. ADMINISTRATIVE DETAILS . . . . . . . 2
A. Schedule . . . . . . . . . . . . 2
B. Change of Scope Submission . . . 2
III. TECHNICAL DISCUSSION . . . . . . . . 4
A. Progress . . . . . . . . . . . . 4
1. Optics . . . . . . . _ . . . 4
2. Diffraction Grating . . . 7
3. Viewer . . . . . . . . . . . 7
B. Trips . . . . . . . . . . . . . 9
C. Work Planned for Next Period . . 9
1. Optics . . . . . . . . . . . 9
2. Diffraction Grating . . . . 11
3. Viewer . . . . . . . . . . . 11
Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
I. PROGRESS SUMMARY
The progress is summarized in the following list:
A. The design of the vieker is complete.
B. Detailing of all mechanical parts will be completed by
about 31 January.
C. The light source was changed from an 800 - 1000 watt
Xenon arc to a 1500 watt projection bulb.
D. Eighty per cent of all mechanical parts are fabricated.
E. The x-y translation mechanism has been assembled and
tested.
STATOTHR
F.
STATOTHR
C.
has completed the first try under
Phase II. A test report will be presented at the
next meeting, which ,ill be held on 29 January 1965.
is at work on fabrication of the
optics. Their schedule has slipped two months.
"M Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
II. ADMINISTRATIVE DETAILS
A. Schedule
The schedule submitted in the first three months' report
has lengthened due to the late delivery of optics from
STATOTHR
Their required delivery date was
15 January 1965. This has been extended to the week of 22 March
STATOTHR for completed delivery of all optical elements, some of which
should be delivered by mid-February. was
STATOTHR more than three months late in delivering the optical specifica-
STATOTHR
tions; this placed an added scheduling burden on
to maintain the overall design and detailing schedule. STATOTHR
of the viewer without the optics installed. When the optics
arrive a minimum of time will then be required to align and STATOTHR
In order to deliver the viewer as soon as possible, -
? will assemble and check the electrical-mechanical portions
STATOTHR optically test the instrument. A new schedule based on
delivery schedule and the receipt of a grating from the
customer by early April is sho~,n in Figure 1.
B. Change of Scope Submission
During this quarter the change of scope for the Xenon water
cooled arc lamp was withdrawn. The reasons for this withdrawal are
given in Section IIIA,1. The change of scope covering the X-Y
translation mechanism is still under consideration by the customer
with a decision soon to be forthcoming. Due to the lateness of
this submission and subsequent decision, has proceeded
with incorporating this change into the viewer design.
STATOTHR
Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
 [ I 1 I I 1. 1. 1 1- I 1 1 1
Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
Figure 1.
STATOTHR
STATOTHR
TASK
Jan.
Feb.
Mar.
Apr.
May
June
July
Optical Fabrication -
Diffraction Limited
First 2 x 2 Gratin
Meeting a -
Review Gratin
Second _Try on 2 x 2 Grating -
STATOTHR
Evaluate Grating
r
Fabrication of 10 x 10 Afte
Second Try
Install 10 x 10 from
Fabrication and Assembly - Viewer
(no optics)
Electro-Mechanical Checkout
Install Optics and Align
Install Grating (customer's)
'rest System
Deliver
Prepare Manual
I
Second Set Optics -
STATOTHR
PLANNED SCHEDULE
for
DIRECT IMAGE VIEWER
Based on: Schedule from
Approved For Release 200 1 1117. I 1IIR78ff04744[kd0 06 '1 OOG tonmer
STATOTHR
 STATOTHR
.r
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
III. TECHNICAL DISCUSSION
A. Progress
1. Optics
has been working on the various optical
components. Most of the work to date has been on the modification
of the two objective lenses for the insertion of the square
apertures. The design and detailing of the condenser systems
has also been in progress. Design of the field lens is reported
to be complete but fabrication has not yet begun. The field
lens will consist of three elements, with one element located on
the objective lens side of the grating and the other two between
the grating and the observer. The optical layout depicted in
Figure 2 indicates an optical path of approximately 74 inches,
which results in a total viewer length of 80 inches.
The requirements for the condenser optics as discussed in
the first quarter report have been modified since the ground
glass may no longer be required. This is because of the more
uniform brightness of the tungsten lamp. It has closely packed
filaments and with the aid of a reflector should provide a fairly
even area of light for the condenser optics to collect.
The other area discussed in the previous report was the
requirement for a greater amount of light flux than initially
anticipated. This was to be achieved with a Xenon arc lamp.
This is a relatively costly device for many reasons, one of
these being an auxiliary optical device to control the intensity,
since the arc changes size as the current is reduced to lower the
intensity.
Consideration was given to other light sources, particularly
the standard projection lamp which had been previously rejected
because of its much lower Kelvin temperature. Calculations were
made which indicated that the light flux in the portion of the
spectrum to be used was equivalent to the 800 watt Xenon lamp.
Approved For Release 2001/05/11 : CIA-RDP?4B04747A001700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
A 1500 watt projection lamp was obtained and a small test
program set up. Permission was obtained from a Xenon lamp
manufacturer to test his lamps at his facility. A filter was
obtained which transmitted the band from 495 - 525 mp. A
milli-ammeter and photo resistor with a peak sensitivity at
510 mu was used in conjunction with a simple optical setup to
compare the luminous intensity and luminance of the 1500 watt
projection lamp to an 800 watt Xenon short arc and a 1700 watt
2 inch long tubular Xenon arc. The results indicated that the
1500 watt projection had almost twice the luminous intensity of
the 800 watt Xenon short arc, and slightly higher intensity than
the 1700 Xenon lamp. The luminance of the 800 watt was greater
due to its much smaller area. This was of no significance,
because either source size could be imaged through the system.
The large advantage with the projection lamp is that it can be
easily controlled in luminous intensity by varying the voltage.
The lamp life is much less than that obtained with the Xenon
lamp, but considerably less expensive. The viewer has been
designed for easy bulb replacement.
The expected life of the projection bulb is 50 hours whereas
the Xenon lamp would be around 1000 hours. Comparable lamp costs
would be $14.00 for the projection bulb and $200.00 for the.
Xenon lamp. These were of minor consideration, the main factor
being the added initial viewer costs of around $8,000.00 for
the Xenon lamp..
A continuous spectrum source such as the projection bulb
or Xenon lamp, while not efficient at the wavelengths used,
does allow testing with various filters and different wavelength
bands.
An optical'layout of the viewer is shown in Figure 2.
Examination of the layout gives some idea of the magnitude of
optical components contained in the viewer.
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
 1 . 1-- - 1---. 1 1 . _ . . 1 I ! 1 t [ i.__ _
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
OPTICAL PLAN
DIRECT IMAGE VIEWER
GRATING INSERTED BETWEEN
LENS SECTIONS
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
2. Diffraction Grating
STATOTHR
During these past three months, has conducted
their first try at a 2 x 2 grating. The grating and two replicas
are made and tested. As of this writing a report is being
STATOTHRprepared by -
STATOTHRmeeting held at
and will be presented at the next
- on the 29th of January.
3. Viewer
During the last three months considerable progress has been
made on the viewer design and manufacture.
The x-y translation mechanism, which is a major mechanical
design area, was designed at the end of the previous reporting
period. During this period the mechanism was detailed, fabri-
cated and tested. It will now be disassembled and black anodized,
then reassembled and the appropriate parts pinned. The enclosed
picture, Figure 3, shows the mechanism during testing.
The focusing mounts for the objective lenses and moving
mirror assembly are fabricated. The focusing mounts are designed
with consideration given to the differences in "depth of focus"
of each of the lenses. Both are designed to provide smooth
movements into the tenths of thousandths of inches. One full
turn of the 50X focus knob will move the lens .002 inch, whereas
the 5X lens will move about .006 inches per turn. This should
allow the operator to easily and precisely adjust the focus of
each lens. The lamp housings and blower assemblies are also
fabricated. The air for cooling the lamps is provided by vane
axial fans and is designed to flow past the bulb at 1500 ft/min,
velocity. This air is exhausted from the rear panel of the
viewer. Some light will also be transmitted through this exhaust
duct. This light should not bother the operator at the other end
of the machine.
The frame is designed and fabricated. Control panel
fabrication is complete and will be assembled shortly. A coated
Approved For Release 2001/05/11 : CIA-RDP7B$04747A001700010008-5
 I I t i i c i l 1. 1 1
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
X-Y Translation Mechanism (During Testing)
Approved For Release 2001/05/11 : ClA-RDP18B04747A001700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
glass window will be placed between the viewing bezel and the
front of the field lens. This will seal the front of the
viewer from dust and protect the large field lens.
We were able to design an attractive front control panel
while still keeping the cost in line with the engineering
prototype concept by the use of a simple casting. A photograph
of the casting is shown in Figure 4.
The use of a standard projection bulb as discussed earlier
eliminates the need for an auxiliary enclosure for the lamp
power supply. All equipment will be contained within the
viewer. At the rear of the viewer will be a fitting for attach-
ing the vacuum hose, connection for 115V cps, 15 amp power, and
a fuseholder.
An overall picture of the viewer configuration and appearance
can be obtained by looking at the following two figures (5 and 6).
Figure 5 is the top assembly drawing and 6 an artist's sketch of
the completed unit. Aluminum jig plate has been used for the
frame to provide a stable vibration free base for the optics.
Bulb replacement and filter changes are performed by removal of
the vented panel on top. Film chips are inserted through the
small hatch on top. The large outer shell requires removal
only if repairs are required. Then once the shell is removed
the mechanism is quite accessible.
B. Trips
No trips were made during this quarter of work.
C. Work Planned for Next Period
1. Optics
The fabrication of the optics is scheduled for delivery
during the latter part of the next period.
-9-
Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
Front Panel Casting
Figure 4.
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78B04747A001700010008-5
2. Diffraction Grating
The diffraction grating portion of the program will be
evaluated at the meeting which will be held at TATOTHR
on the 29th of January. Since the customer is also manufacturing
a grating and the relative merits of the two techniques must be
evaluated, the future plans for this portion of the contract are
explicitly known at this time. It is felt, though, that a second
test try should be initiated.
3. Viewer
The viewer will be completed and will be undergoing
acceptance testing. The viewer should be delivered just about
the time of the next report.
Approved For Release 2001/05/11 : Cii- RDP78B04747A001700010008-5
 STATINTL
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
 Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5
Approved For Release 2001/05/11 : CIA-RDP78BO4747AO01700010008-5