YOUR REQUEST FOR PROPOSAL NUMBER RD-12-66

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001900020014-6
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 9
• Document Creation Date: December 28, 2016
• Document Release Date: February 23, 2005
• Sequence Number: 14
• Publication Date: April 14, 1966
• Content Type: LETTER

STAT
STAT
STAT
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14 April 1966
Post Office Box 8031
Southwest Station
Washington, D.C. 20024
STAT
Declass Review by NGA.
Reference: (1) proposal 65-184, dated December 1965
(2 letter T3410-66-24, dated 24 January 1966
(3) Your document entitled "Additional Specifications to
be Included in the Development of an Advanced Rear-
Projection Viewer"
Subject: Your Request for Proposal Number RD-12-66
This will confirm our discussions April 7 with members of your technical
organization at our facility at Our response is organized
to correspond with the paragrap numbers o your document to aid in your
evaluation.
1. Semi-Automatic Film Loading
We will provide the following:
a. Automatic translation and rotation of film transport to load
position.
b. Automatic stop of film reel drive before film is run off spool.
Manual override is provided to permit running off spool.
c. Automatic disabling of the film transport in the event the film
is loaded improperly or the follower arms have not been released.
d. A hinged film gate will open for loading.
e. Threading paths will be clearly and permanently marked on the
main support plate of the transport.
f. Time for loading the film transport will be less than one minute
and we anticipate this time will be reduced to approximately 30
seconds for experienced operators.
STAT
STAT
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2. Film Positioning
We assume the intent of this requirement is to facilitate the auto-
matic centering of the film. We propose to provide this capability
as described in Paragraph 11 below.
3. Resolution
We will provide on-axis resolution of 10 lp/mm at 3X magnification
linear to 6 lp/mm at 70X magnification and 15 inches off-axis reso-
lution of 8 lp/mm at 3X magnification linear to 4.8 lp/mm at 70X
using a high contrast resolution target.
As we mentioned in our letter January 24, we are developing a rear-
projection viewer to fulfill the requirements of the Strategic Air
Command. Preliminary results obtained from optimizing the 3X to
100X zoom lens for this viewer are encouraging. If we obtain reso-
lution performance equal to or better than you require with this
single zoom lens, this would permit us to provide you a screening
viewer at an estimated savings of at least 15 percent of the unit
price in production. We will keep you advised of our progress in
this area.
4. Film Gate Temperature
Maximum film temperaturein the film gate will be 100? F when used
in an ambient room temperature of 80? F or below. The film gate
temperature test will be run with film of 1.5 ND filling the gate.
The light source will be adjusted to maximum brightness and the
recording thermocouple placed in the film gate. The test will run
for three hours.
5. Film Aperture
The entire width of 9-1/2 inch film will be projected with the ex-
ception of a triangular area measuring 1-1/4 inch on a side in each
of the four corners. This area will be vignetted at the 3X magni-
fication only when 9-1/2 inch film fills the aperture. As the mag-
nification is increased, this area will decrease until at approxi-
mately 3.7X the entire corner is filled.
6. Focus
In the static mode the imagery will remain in focus throughout the
magnification range, provided the focus has been adjusted at the
highest magnification. In the low magnification range (3X-30X),
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the imagery will remain in focus under dynamic conditions except as
the magnification approaches 30X the effects of differential focus
(resulting from film curl) will begin to become apparent. As the
magnification is increased, retention of focus will be affected by
the film as well as the operating mode. Under certain combinations
of conditions, retention of focus may be excellent. Scanning along
the length of the film will cause little, if any, change in focus.
Transverse scanning is more susceptible to the effects caused by
film curl. Several factors influence focus control which have a
bearing on the problem (e.g., age and general condition of the film,
variations in film base thickness, moisture content of the film and
relative humidity, etc.). We are confident that mutually acceptable
objective test conditions can be established to demonstrate operational
suitability. Please refer to Page 4-21 of our proposal (Reference 1)
for a more complete description of focus and its control.
7. Screen Brightness
We will meet the requirements as follows:
a. A minimum brightness of 20 ft-lamberts at any magnification with
a film of neutral density (1.5) in the film gate. The brightness
is to be measured with a Spectra Brightness Spot Meter looking
along an axis pointed to the pupil of the projection lens. The
above value is based on a viewing screen in the system which has
a gain of 2.5X.
b. The screen will be uniformly illuminated and the illumination
will not deviate by more than 10 percent (when measured as indi-
cated in Paragraph 7a) except for the vignetting mentioned in
Paragraph 5.
c. The light intensity will be continuously variable from 100 per-
cent to 50 percent of maximum.
d. The color temperature will not fall below 3400? K.
e. Based on the manufacturer's information, the brightness of the
light source will diminish 30 percent during the 1000 hours of
operation. Reduction in output is not linear with time, but is
exponential, i.e., the most reduction will occur during the
latter portion of the 1000 hours. A running time meter incor-
porated in the unit provides an indication of when the lamp
should be replaced.
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8. Film Damage
We have met previous requirements to test and demonstrate that the
viewer will not damage film. Mutually acceptable test and demonstra-
tion procedures can be established as part of this program.
9. Distortion
The distortion requirement of two percent or less will be met. The
distortion is to be measured in the conventional manner, i.e., along
radial lines whose point of origin is the center of the optical sys-
tem.
10. Safety
The xenon lamp, when installed, will be completely enclosed in heavy
guage sheet metal to protect both the operator and the viewer. A
tempered glass port in the lamp housing seals the aperture on the
condenser side of the housing. Interlocks are provided and a thermal
switch precludes opening the lamp housing while the lamp is on or
still hot. A running time meter provides an indication when the
lamp should be replaced prior to lamp failure. Ozone formation is
prevented by the special quartz envelope of the lamp. A thermal
switch in the lamp housing assures safe operating temperatures and
automatically shuts the lamp off in the event of blower failure.
Safety in handling the lamp is enhanced by permitting access to the
lamp only when it has cooled and the internal pressure is greatly
reduced. The lamp should be kept in a container at all times and
removed only for relamping.
11. Joystick Motion and Positioning
a. We will provide a control to automatically position the film
transport so the film center is under the center of the optical
system. A dial control, marked in film width, will be mounted
on the control panel. Below the dial there will be a pushbutton
which upon being depressed will cause the transport to center
the size film shown on the dial.
b. We will provide a control to automatically rotate the film
transport to a reference position. A dial control, marked in
degrees of rotation, will be mounted on the control panel.
Below the dial there will be a pushbutton which upon being
depressed will cause the transport to rotate to the reference
position.
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c. The joystick control assembly will be movable and a spiral
extension cord will permit operation of the viewer from a
distance up to four feet from the viewer control panel.
We appreciate the opportunity of meeting with members of your tech-
nical organization to discuss your requirements in depth for an
advanced rear-projection viewer. We believe we have met the intent
of these requirements. After you have reviewed our comments we be-
lieve it would be advantageous to discuss the alternate methods of
contracting proposed in our letter January 24.
We are looking forward to participating in this program with you.
WLP:HVB:mpb
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ADDITIONAL SPECIFICATIONS TO BE INCLUDED IN THE DEVELOPMENT Or AN
ADVANCED REAR-PROJECTION VIEWER.
1. Semi-Automatic film loading. The operator simply loads the
film spool in the transport and attaches the end of the film to a
device which then carries it through the projection platen to the take
up spool. The take up spool can be a special design; however, no
adjustments should be required to accommodate various film sizes. The
removal of the take up spool will not be required i.e., a fixed film
clamping take up spool would be acceptable.
2. Film Positioning. The mid-point of all the various film
widths will always be positioned at the mid-point of the film projection
gate.
3. The resolution requirements are 10 1-
p/mm/magnification power
3X and 6 lp/mnn/magnification power @ 70X using a high contrast resol-
ution target. These values are to be read on the viewing side of the
screen and should not vary more than 20% over the entire screen. The
resolving power should be no less than shown in Figure 1 (solid line)
below.
It should exhibit no less than a linear decrease between the
maximum and minimum points. There is no objection to the curve being
concave downward as shown dotted below.
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4. Maximum acceptable film temperature in the film gate is 100?F
when used in an ambient room temperature of 80 0 or below. Temperature
tests will be made with silver halide film, in a static state, with
a fogged density of 1.5, completely filling the entire gate, with
the light source burning continuously at maximum brightness for three
hours.
5. The film aperture shall measure no less than 9.5" X 9.5".
The entire width of the 9.5 inch wide film will be projected.
6. The imagery shall automatically be in focus at any magnification
either in the static viewing mode or in the transport mode. This
requirement does not apply to the high speed slew mode; however, the
operator must be able to scan the film at a selected rate (depending
on the magnification) with the entire projected image remaining in
sharp focus. The necessity for manual focus adjustment when changing
from the static to the dynamic viewing mode will not be required,
nor will a focus adjustment be required when the magnification is
varied. A focus adjustment is permitted for emulsion up or down
variations and initial loading.
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7. Screen Brightness. The screen brightness, as viewed from
the position of the observer, will have a minimum acceptable luminance
of 20ft.-lamberts at any magnification. This luminance will be
measured with a film of neutral density (1.5) filling the film ,plane.
The screen will be evenly illuminated and at no point will the
illumination deviate by more than 10%. This brightness requirement
will not be obtained from 3X to 3.7X in the one inch square area at
the corners of the screen. It is required that the light intensity
be continuously variable from 100% to 50% of the above values. The
color temperature of the. illumination shall never fall below 3-I-00?K.
The brightness of the original light source shall not diminish by more
than 10% during the first 1000 hours of operation.
8. Film Damage. There will be absolutely no damage to the film
either in the static or dynamic conditions.
9. Distortion. The optical system is to be so designed that
when the image is in sharp focus there will be no apparent color
fringing on the screen when the screen is inspected with a lOX magnifier
when a calibrated grid is projected; geometric distortion of the images
at the screen shall not exceed 2 per cent.
10. Safety. The xenon arc lamp shall be adequately enclosed to
completely protect the operator from a possible explosion of the
lamp.
11. Joystick Motion and Positioning. Push button controls shall
be provided to automatically center the projection system over the
mid-point of the film. Another push button control shall provide
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automatic image rotation to a reference position. The joystick motion
control shall be extremely sensitive -- the film speed will not vary
when the joystick is positioned at a constant deflection. The null
position shall be positive and limited in range. The joystick control
assembly shall be removable from the viewer to permit the operator
to control the image motion at a distance up to 4 feet away from the
viewer.
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