TASK ORDER NO. 3

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A000600010063-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 17
• Document Creation Date: December 28, 2016
• Document Release Date: July 30, 2004
• Sequence Number: 63
• Publication Date: June 30, 1965
• Content Type: LETTER

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STAT
30 J'Une 1965
STAT
Task Order No. 3
ai al. Test ;pma List ? Dtted 6,/30/65 - `our (4) copies
STAT
c tl utent
I -- _ _ _ ru is her dth,
Contracting officer
o Special Test uipetismt a utrsd for etbject task
gr phtc and Spa etronic Processing Equipment items list/ ecccspt
STAT
doidgmted. by Dotes 1, 2 and 4* ax's short lead time items for the
p ogr . If the go3rarAMAt wisps to furnish any of the items listed, STAT
should be so 3normd no later then 3J July )$6S
in
,
be &U* to initiate Purchase Orders prior to our plant ahutdom
stirs main enancs of the murk schsduls*
retsrene d as Not" 1 2 and 4 ar* lon r lead items wh a are
iewsedialy viii at a Utter date STAT
piarisg Purchase Orders,
he a primte eq u ' . we vDa en subndt description is you
short lead t'ico it,ms vt13 be needed early in August 1965. The aee nzfa-o-
of th. 91crodaneiitamtsr is presently building two such, one of whioh
b* delivered alsawhare. We w uld appreciate an i nnediato indication of
na7, on this iteea, because a new a tanufaactizrilg lot would require a
ovd7e*
for equipment r -'.eent veeadors prig and do not include
tt wAm an our pr. iouse 1y submitted Price An*ly* ie Ste.
ass fool free to contact the undersigned,
you bane err questions or desire further information In this ea&tter
Near _ truly your'',,
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NGA Review Complete
STAT
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INTERDEPARTMENTAL CORRESPONDENCE
STAT To:
STAT
DATE 29 June 1965
Special Test Equipment for PIP
The special test equipment to be acquired for the PIP
programs is specified below.
EPT (Photographic Processing)
Yoke Driver
Photo-Multiplier Supply
,.,High-Voltage Power Supply
-Film Dryer (Anhydrous)
Porta-Mixer
Combination Sink
incl. Cabinet
incl. View Lite
Photometric Microscope
Photometer/Calibrator
Step Wedge tz i;Ev
Printer
Temp. Control, Twin
Water Filter
Print Dryer
Microdensitometer
incl. Ratio Arm
Sensitometer
Copying Lens
-,-~> Micro Copier Camera
EPT Electronic Processing
Deflection Drivers (2)
Analyzer
Spectrum. Analyzer
note 1 - equipment models still under review, to be specified
by at later date.
note 2 - step wedge to be developed, to be specified by
at later date.
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note .3 - previously quoted price:
note ZI- - analyzer model still under review, to be made firm
by at later date.
STAT
The equipment specified above for EPT (Photographic Processing)
should be acquired as soon as possible. Any delay of permission
to order this equipment will upset the program schedule. Long
delays of permission to order all the equipment specified above
could significantly affect the program completion dates.
STAT
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The use of Fourier theory to image assessment, image quality.
Assessing spread function, granularity.
Fineness of detail due to close relation between spatial frequency
(x, y direction).
Judicious choice of best film -developer combination - choosing of
film where the greatest possible amount of information to be recorded
by film. Slow film may yield better results than fast film.
Information content recorded in the emulsion per unit area -
density level - contrast.
Selecting of film by means of information content.
Evaluation of maximum information capacity.
Numerical results to compare various film-developer combinations.
Ability of film to record low contrast objects efficiently.
Total information capacity of each film.
Variation in density level of the total capacity of film. Possible
range of film. Range and application of each film to over-all
efficiency within this range.
Perception of detail -
Information index - test objects of just detectable size, shape, contrast.
Square array.
Circular holes.
Cones.
Density variations in test objects.
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Luminescence level.
Destruction of detail due to graininess.
Microscopic non-imaging spots in processed film.
Occurrence (detection - associated to scale)
low image density
high image density
regular shape
irregular shape
relation to image background
relation to magnification
relation to image detail obstruction
or degradation - micro image outline.
Causes -
Dus t
Chemical (water spots, reticulation)
Packaging - storage
Fumes (Oxidant)
Handling
Film chemical composition
Storage (high humidity and condensation)
Age
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Pattern Structure -
Circular
Filament
Clumped
Peppery
Uniform - random
Prevention -
Proper film storage temperature (550F).
Warming before exposure to surrounding air.
Constant humidity.
Constant purification of air.
Constant temperature.
Removal of oxidants.
Effective sealing of film.
Careful, clean handling.
Gold toning - if possible - very resistant to atmospheric
attack - reduces fading - important for achival negative/positive.
Negative scanning by cathode ray tube.
Systematic method of determining photographic requirements.
1. Evanescence of CRT trace.
2. Photometer determination of radiance.
3. Exposure, density, as a function of CRT luminance range.
4. Photometric procedure and results to study of image modifica-
tion and determination of exposure values, parameters on which
exposure value depends.
5. $ ar ~ ~,20~#/~~5 : CIA-RDP78BO477OA000600010063-7
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6. Photographic exposure (product of irradiance and time,
or energy per unit area).
7. Value of energy for forming image as a function spectral
components that are effective and ineffective.
8. Range of film spectral sensitivity.
9. Spectral distribution, or changes in spectral distribution
during emission, or during decay of phosphorescence.
10. Spot size - irradiance of phosphor from center to edge of
spot - may cause variations in exposure as the spot sweeps
across.
11. Constant sweep velocity, or modulated sweep velocity.
12. Photoelectric photometer measurement, sensitivity, range.
Sensitivity to increments of light flux interrelated to
microimage density, transmission.
13. Total flux entering the photometer at instantaneous irradiance,
or flux from negative/positive proportional to density, or
modified density.
14. Integration of densities - such as image - background - for
reduction of granularity.
15. If mask used - total flux measured by photometer - mask combination
as the relative CRT spot irradiance, afterglow disappears, and the
spot is eclipsed by portions of the mask.
16. Uniformity, distribution of radiance across trace - density
relation - contrast. Reciprocity failure. Density edge gradient
of image.
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17. High velocity or low velocity - or variation of spot size as
a function of spatial frequency - here it means the spacing
between one density increment and the next - by this means
given microdensity increments can be selected or integrated.
18. Astigmation in the electron-optical system - effect to spot
size, shape, focus.
19. Electron-optical focus for sharpness of image detail.
20. Presence of electrical noise in trace. Detection, elimination,
or suppression of noise.
21. Relation of noise to spot size, shape, irradiance.
22. Relation of beam current to total flux, density.
23. Effects of velocity variations when velocity is to be constant.
Effects on intensity, exposure.
24. Determination of exposure per selected negative - positive -
chemical processing combination.
25. Spectral selectivity response of negative - positive combination
to match spectral distribution of phosphor.
26. Use of flash photometer, microphotometer with optical aid to
magnify spot size.
27. Prediction of density of photographed trace.
28. Relative film speed by use of CRT operated at ? beam current.
Exposure modulation obtained by varying spot velocity and number
trace passages. Resulting curve. Estimation of relative speed.
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29. Photographic - photometry - this use the comparison of source
of known intensity with that of unknown intensity by means
of photographic results.
30. Video scan lines only, no retrace scan line - video lines
must cover entire neg.
31. Registration - linearity.
32. Correlation between density elements, content of negative-
positive and actual video signal. The greater the number
of negative micro-density elements scanned, the higher video
resolution (1000, 2000, 8000 ) more negative detail can be
modified. Higher the total number of picture elements increase
in image detail resolution.
35 mm film has 500,000 picture elements.
16 mm film has 125,000 picture elements.
Video should try to approach it so that discrete image detail
is not lost and it is reproduced - modified for better perception.
33. Consideration of lens characteristics.
34. Scale factor - magnification.
35. Exposure related to magnification.
Macrosensitometry.
" density.
Sensitometric characteristics of micro-images.
Cannot be described by conventional H & D curve. If large area exposure,
density relationship interrelation.
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Effects of image size density as a function of light - chemical
diffusion.
Macroimage sensitometry - image size, exposure, density of image and
image background.
Construction of macrosensitometric curve based on H & D.
Construction of macrosensitometric curve for high-contrast densities.
Construction of macrosensitometric curve for low-contrast densities.
Variation of density with image size and contrast.
Cause of contrast by anti-halation coating.
Contrast improvement from use of anti-halation at varying image size den-
sity in macroimage regions.
Contrast variation in successive generation of negative-positive
reproduction steps.
Prediction of detail degradation, improvement during successive reproduc-
tion steps.
High, and low contrast development for density modification during
successive reproduction steps (successive exposure with electro-
photomasking - photomasking).
Relation between density and chemical treatment.
Increase in macrocontrast with increased intensity modulated light
for modification of image detail and image background tail.
Detail rendition of images at low-high contrast:
1. Contrast reduction, due to spread function, when image size is of
the same order as the spread function of a point image.
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2. Granular structure of developed image - influence on quality of
detail.
3. Exposure value to minimize density fluctuation within image
element with increasing or decreasing density.
4. Density point gradient - within toe and shoulder slope making these
linear by expansion-contraction of incremental density gradients within
toe and shoulder, or density modification of point gradients.
,,Quantum efficiency of emulsion versus CRT tube?
Preparation of experimental samples:
Processing variables.
Effects on images.
Analysis of data.
Characteristics of image.
Experimental results.
Experimental materials and procedure.
Effects of spread function on the formation of image detail:
1. Granularity of film - enlargement factor.
2. Graininess of film.
3. Diffusion of light by imaging systems and emulsion set limit to
minimize size detail that can be recorded (point spread function).
4. Density packing permitted to minimize granularity.
5. Limits of spread function.
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- 9 -
Factors limiting image detail rendition by CRT:
1. Beam power density to produce required concentration of energy to
produce required detectable element, record on photographic film.
Is it 1 uu_ sec exposure. At 10 u,_ diameter? Writing need 10,000 miles/,dec.?
2. Light level to detect, record low and high density levels.
3. Detection of incremental densities within .02 to 3.
4. Saturation of emulsion layer by CRT light exposure.
5. Maximum sensitivity of film to desired detail rendition and offset
contrast and granularity.
6. Optical factors - transmission efficiency - direction of phosphor
energy - transition to sensitive photocell, and emulsion with minimum
aberration.
7. Beam density determines resolution-limit.
8. Intensity range, without damaging CRT due to beam penetration of
'r phosphor layer.
9. Spot size limit due to scattering and multiple reflection within
phosphor crystals.
10. Varying radiation of light by the phosphor due to mechanical
application of the phosphor scan material.
STAT
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 STAT Approved For Release 2004/08/25 : CIA-RDP78BO477OA000600010063-7
Approved For Release 2004/08/25 : CIA-RDP78BO477OA000600010063-7