REQUEST FOR PROPOSAL FOR A COHERENT WHITE LIGHT VIEWER BREADBOARD #50031

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001700040007-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 10
• Document Creation Date: December 28, 2016
• Document Release Date: February 8, 2005
• Sequence Number: 7
• Publication Date: February 13, 1970
• Content Type: MF

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IPIc!Ts G/R -x65.7'0
13 Ftbruary ir7C
)4 RJ DU M FOR: chief, Elpecla
Request for Props,
& sadboard f50(,31
INPIC
t;uhere t White Light Vierier
1. It is requested that a ovp.+ of the encloted De"lopment Objectives
for a Coherent White Light Viewer & eadboard (Attsch ent 1) be sent to:
25X1
2. This organization should b reyvteete8 to abmit a proposal prior
to I April 1970 in response to t1w ?equixemmts set forth in the develop-
ment objectives.
3. The Agency association: it. atONF^ TIAL .
4. The nature and title of the wank to be proposed an is unclassified.
5. Technical a rvices & tuWo Group plans to Ba it IY-1970 funds
for this project.
6. In your core icr:,tion -wit= this prospective ntr ctor;e It .e'
requested that the MM project niz,ber, as listed to the subject of t bi?
r!te randui, be included as a part 2V the title. In addition, the contractor
should bed informed that should t Lrtib it ar c.ccept ble bid, he vill be ex-
pected to confort to M-1001 htte.d era1. ^ ), M1033 (Attachment 3 ), nd
Propo sl Format (Attacbmart 4).
7. It is anticipated that wjj.,-so.rx--.e )roc. t will be to the
Gov is advantage. This is 1 eet past perform-
ance in building a eimi r device i t to US Rote Air Development Certer,,
and the fact that tam dollar sav:,s .,s W. y be rovli zeds d to partial use
of efforts and technology` cowcn to both devices. Of course,, this pre-
supposes an acceptable bid. F3 not:. eeeisicr or this point will be made after
analysis of the contractor' a propois .l. ha<
n o t been made aware of this sole-ccp'ree rtert o i.
Declass Review by NGA.
25X1
25X1
1 GROUP f
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down~rad)n; and
SECRET ~~-assit3catlon
 SERE
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SU.TECT; Request for Proposal ft a Coberent t
0031
Chief, Rea
Atta.enta: (4)
As stated
Distribution:
Orig - Addressee
C//
V2- ,. C/ / /
-.h-& Engineering Divir i on,
TS$G
NPIC/TSSG/RID/SRB (13 Feb 70
25)1
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BEST COPY
Available
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DEVELOPTEIT OBJECTIVES
COHERERT WHITE LIGHT VIEWER BREADBOARD
These development objectives set forth the requirements for a bread-
board version of a rear projection viewer which utilizes a laser as the
source of coherent light. The ultinate aim is two-fold: (1) to develop
a light source which will improve the contrast and resolution of a pro-
jected image, and (2) to provide a unique light source for rear projection
viewing of color film.
2. SCOPE
This development effort will consist of the design and fabrication
of a coherent white light viewer breadboard suitable for evaluation of
predicted increased resolution and for use as experimental equipment to
determine light source specifications for color film viewers. To accom-
plish these tasks, three monochromatic laser outputs will be used as pri-
mary colors a: _d combined additivelyCll\ to form white light of selected
chromatic content. An incoherent source of light will be provided for
comparison purposes. Suitable optics, viewing screen and light manipula-
tion devices will be included.
3. CONCEPT
Recent experiments using coherent light versus incoherent light as
the source for rear projection viewing indicate that increased resolution
on the screen is realized. This increase is estimated to be about fifteen
percent (15%). However, due to the laser wavelengths used in these
experiments, the image presented on the screen was in gradations of a
greenish-blue color. While this may be acceptable (although undesirable)
for viewing black and white film, it is obvious that when used with color
film, it would present an unusual and misleading appearance.
Proper rendition of the colors when viewing color film by transmitted
light is a complex task dependent on a combination of factors. Most impor-
tant among these, other than the psychological aspect, are: (1) the
actual color of the scene, (2) the lighting conditions at the instant of
film exposure, (3) the color balance of the film (through a built-in filter),
(1k) control of the film development process, and (5) the spectral quality
of the viewing light source. Of these five factors, when considering re-
connaissance type photography, the first is fixed by uncontrollable circum-
stances; the second, although controllable to a limited extent by choice of
time of film exposure, is, broadly speaking, fixed by nature; the third can
be adjusted to close tolerances by the film manufacturer; and control of
the fourth is well within the cpability of the film processing laboratory.
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This leaves only the fifth factor, ahe light source, which is -oresc__tty a
subject of considerable controversy.
The spectral quality of the viewing light source is interrelated with
the sycholoE-'cal aspects of color vision. Unex-plained variations exist
in ,hu-:an color irerce-otion between i viduals. Present and future investi-
gations of t' ese variations wi 11, hopefully, lead to specifications for a
standard light source.
The device described in these develop-cent objectives is directed toward
research into the aforementioned cro'olem areas plus additional areas that
may become '_.nowr_n. This piece of equipment will be used primarily as a
laboratory tool for evaluation purposes. The basic functions of the bread-
board will be to allow investigation of the effects upon perceived resolu-
tion using a coherent versus an incoherent light source and to allow research
into the psychological aspects of human color perception through manipulation
of a coherent white light source which would have selected, but variable,
fominant wavelengths and excitation purities.
4. RRQUIREi,m=LS
4.1. General Configuration - The overall size and weight of the bread-
board and its supporting table will be kept to an absolute minimum. This
factor. is of paramount importance, since the equipment will be subject
to occasional moves through doors no greater than thirty-six (36) inches
in width. Partial dismantling will be acceptable.
4.2. Optical System
4.2.1. Resolution - The resolution specification for the complete
optical system is 10 lines/millimeter/magnification -power using a
high contrast (1000:1) resolution target. This value is to be
read on the viewing side of the screen. While this requirement
must be met when using either of the light sources specified in
paragraph 4.2.5.1, it is anticipated that the coherent light source
with resolution enhancement will out perform the incoherent light
source.
4.2.2. Color Fringing - 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 it is inspected with a lOX
magnifier.
4.2.3. Magnification - The optical system will provide a magnifica-
tion of ,5X on the screen,
4.2.4. Screen - A Polacoat LS-60G rear projection screen will be
furnished with the breadboard. The size of the screen will be 15
X 15 inches. Provision will be made for easy removal of this
screen and insertion of like-sized test screens to be furnished
by the sponsor.
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4.2.5. Illuminat on
4. 2.5. 1. t,, Sources - Two light sources, e ch c ..hich
x_ll be capable of satisfying the screen bri ': _ne re-
c.uiren,ents set forth in paragraph 4.2.L7.2. , will be nro-
vided. One will be a coherent source (lasers ), incorpora-
ting a coherent array for resolution enhancement, and the
other will te a suitable incoherent source.
4.2.5.2. Screen Brightness - The screen brightness, as
measured from the surface of the side of the screen nearest
the observer, will have a minimum m luminance of twenty (20)
foot lamberts. This luminance will be measured at the
optical center of the screen surface with a film having a
density of one point zero (1.0) filling the file plane and
with a screen having a single side lambertian gain of one
installed. The screen will be evenly illuminated and at
no point will the illumination deviate by more than ten
percent of the maximum value. ft is required that -she
light intensity be continuously variable from one hundred
percent to fifty percent of the twenty foot lambert lumin-
ance value, controllable by the operator of the equipment
(not necessarily the screen observer). The above specified
luminance conditions will apply for either the coherent or
incoherent light sources when they are adjusted for equal
energy white light. Equal energy white light, for purposes
of this document, will be defined as white light ecuivalent
to equal amounts of the three primary colors as used in the
International XYZ~System adopted by the Commission Inter-
nationale de i'Eclairage (CIE).
4.2.5.3. Coherent Light Manipulation - A simple system
will be provided in the paths of the three primary laser colors
to allow for choosing white light of various dominant wave
lengths and excitation purities. This simple system will
include calibrated indicator markings so that the equipment
operator (not necessarily the screen observer) may set in
various percentages of the three primary colors and recover
previous settings, if necessary.
4.2.5,1+. Incoherent Light Manipulation - A simple filter
system will be provided in the path of the incoherent light
source to allow for choosing white light of various dominant
wave lengths and excitation purities. Appropriate filters
will be provided for adjusting the incoherent light output
to equal energy white light as defined in paragraph +.2.5.2.
This system will be designed for convenient use by the
equipment operator (not necessarily the screen observer).
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4.2.5.5, A s mple ,cr'_ _'on
varying toe of tie light reaching .:creep
f ro :1 e ther hC CCi=E_^c_' or i nco_ erein?t ligh ou cos will
be provi ed. r^is system be designed for convenient
use by the ea'u.i-s::,.cnt operator (not necessarily the screen
observer).
4.2.5.6. L'I.7_r Source Selection - A simple device will
be provided for selecting either the coherent or incoherent
light source to the total exclusion of the other. A cap-
ability for s,,7-!t
c_i ng; from one source to the other in less
than 10 seconds mandato-ry. This device will be designed
for convenient use by the equipment operator (not necessarily
the screen observer
4.2.6. Focus - A simple system for focusing either projected image
on the screen will be provided. When set, the projected image will
be in sharp focus at all _coints on the screen. This system will be
designed for convenient use by the equipment operator (not neces-
sarily the screen observer).
4.2.7. Film Chip Holder - A sizable device suitable for holding
100 X 100 millimeter film chips in the optical path, -flat and
perpendicular to the principal ray of the optical system will be
provided. An X and Y drive capable of allowing projection of any
portion of the film chip onto the screen will be incorporated. This
device will be designed for convenient use by the equipment operator
(not necessarily the screen observer).
4.3. Construction
4.3.1. Mechanical
4.3.1.1. Breadboard Base and Table - The light sources and
all components of the optical system will be mounted on a
breadboard base having sufficient rigidity to insure con-
tinued optical alignment after initial leveling and align-
ment on a fabricated steel table. This table, to be fur-
nished by the contractor, will incorporate a suitable
number of leveling jacks placed strategically across the
top surface of the table. Ancillary equipment will be placed
on racks under the table. Suitable flexible connections
between the ancillary equipment and the breadboard components
will be provided.
4.3.1.2. Cabinet - A minimum cost, easily rer-ovable, but
sturdy, cabinet type cover will be provided to enclose the
light sources and all optical components exce_ct the viewing
screen. The screen, mounted rigidly and perpendicular to
the breadboard base, will be available for easy viewing by
an observer through a suitable aperture in the side of the
cabinet. Convenient access doors will be provided in the
-4-
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sides of the cabinet for ease of i 11 :m~nat l
adjustments by the equipment operator (not
the screen observer). The intent and purrose of t.__._
simple cabinet is to provide for isolating -she
side the projector from the eyes of the screen observer,
either directly or by reflection.
4.3.1.3. Painting - The table and both the exterior and
interior of the cabinet, including the components housed
therein (other than lenses, mirrors or the screen) will
be coated with a non-reflecting black paint to the extent
that spurious reflected light will be minimized.
4.3.2. Electrical
4.3.2.1. Power - This equipment will be capable of
operating 7 _208 volt, plus or minus 2%, 60 Hertz, single
phase, alternating current. Prover fusing will be supplied
to prevent circuit overloads, and a spare fuses will be
located immediately adjacent to each fuse holder (circuit
breakers may be substituted for fuses, if desired). A
heavy duty, Underwriter's Laboratory listed, 3-conductor
electrical extension cord with 3-prong Hubbel, or ecuiv-
alent, twist lock plug will be furnished with the bread-
board for connection to the operating power source. This
cord will be at least 20 feet long.
4.3.2.2. Circuit Diagram - To expedite maintenance, an
electrical circuit diagram.' will be permanently attached
to the inside of one of the cabinet access doors.
41,3.3?? Cooling - Should liquid cooling be required, the coolant
will be of a type which is not injurious to personnel or to the
equipment itself. Particular attention should be directed toward
designing a system which will direct any leaks away from the
screen observer and the equipment operator. An easy coolant re-
plenishment method should be supplied if a closed-circuit system
is used. In addition, all areas of the cooling system must be
accessible for inspection and maintenance. Should water be used
as the coolant in an open-circuit system, appropriate filters will
be furnished to preclude clogging of water jackets or piping.
4.3.4. Safety
4.3.4.1. General - It is essential that personnel exposure
to hazardous situations be minimized. This should be
accomplished first, by eliminating hazardous conditions
through effective design and secondly, by protecting per-
sonnel from hazards that cannot be eliminated.
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Li. 3.4.2. 1Qinimair. P_^ecautio_ s - The follo:;ing
safety precautions will an-ol y: (1) All external, non-
current-carrying metal-Darts must be electric-all- con-
nected and grounded; (2) Provision must be nada to
prevent personnel from coming into contact with circuits
operating with an open circuit potential of 30 volts or
more and a capability for delivering 2.5 pea:.
amperes or more into a short circuit--where necessary,
interlocks will be employed; (3) Special precautions to
completely protect personnel from possible breakage-or
explosion of lamps must be made; (-,) moving parts (e.g.,
ventilating fans, drive belts, gears, etc.) must be
enclosed; (5) Sharp edges or corners should be avoided;
(6) Design shall preclude inadvertant blockage of venti-
lating air intakes or exhausts; (7) Ventilating air
exhaust shall be directed away from the equipment
operator and the screen observer; (8) Design shall pre-
clude the possibility of direct viewing of the laser
beam or of the laser beam striking any smooth reflecting
surface which might accidentally produce a specular re-
flection into the eyes of nearby personnel; (9) Appropriate
warning signs. shall be strategically placed as necessary.
4.4. Manuals - Three (3) copies each of an operators and a maintenance
manual will be supplied with the equipment in accordance with the Govern-
ment Specification DB-1003, attached. Exception--Xerox, or equal, copies
of typewritten content, bound in loose leaf form, are acceptable.
(Technical specification manuals, available from major parts suppliers,
should be included.)
5. MISCELLANEOUS
5.1. Operating Environment - The equipment will normally be used in an
area having an ambient temperature of 720F plus or minus 20, and a humid-
ity of 55% plus or minus 5%.
5.2. Inspections - Preliminary inspection of the finished product will
be conducted at the contractor's plant. Final acceptance will be made
at the sponsor's facility.
5.3. Reporting - The contractor will be required to submit monthly,
final and financial reports in accordance with the Government Specifica-
tion DB-1001, attached. The final report will summarize the -progress of
the work. It will be completed within the allowable cost of the contract
and will be forwarded to the Consignees specified in the contract no
later than thirty (30) days after the agreed contract period.
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Peopo:'.l]_ 1?orin at - Subni:Lc iou Of ally'' iil L
development objectives will conform to the attached Guide for Proposal
Format. This provision is mandatory.
5.5. Resumes - Accompanying each proposal there will be a detailed one
page resume covering each of the contractor's personnel who will con-
tribute fifty percent or more of their time to this effort.
6. GENERAL
The contractor should be guided by the principle that the end product
of this effort (a breadboard) will be used primarily by highly qualified
engineering and scientific personnel for testing under controlled laboratory
conditions. Esthetic appearance should therefore be subordinate to perfor-
mance and cost.
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