MODIFICATION OF THE 1032T MICRODENSITOMETER

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001400070019-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: February 8, 2005
• Sequence Number: 19
• Publication Date: September 24, 1968
• Content Type: MF

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Declass Review by NGA.
TSSG/TAD-131+/68
24 September 1968
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MEMORANDUM FOR: Chief, Development & Engineering Division, TSSG/NPIC
ATTENTION:
SUBJECT:
REFERENCE:
Memo, NPIC/TSSG/DED-1339/68, 27 August 1968
1. The three modifications to theL____~032T Trichromatic
Microdensitometer required by TAD are; an increase in sampling
rate, a capability for control of the number of samples recorded,
and an improved optical system.
2. The following answers to your questions (ref. memo) con-
cerning these modifications are being forwarded for your information
as requested:
a. Smallest sampling interval required is 0.1 micron
per sample.
b. The greatest sampling interval required is that
which presently exists on instrument.
c. The slowest scan speed that can be tolerated at
0.1 micron/sample should be 5mm/min in the tri-color mode
and 12.5 mm/min in the B&W mode, if scan speed is sampling
system limited. At 1 micron/sample the existing speeds
are satisfactory.
d. The present tolerance for absolute position of
each sample based on the encoder pulses is satisfactory.
Any interpolation between encoder pulses must be accurate
to one percent of the nominal interpolation interval.
e. The tolerance required for relative position is
the same as paragraph d.
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f. The shortest scan required is one word of recorded
data (assuming scan is done on logic).
g. The longest scan required can be accomplished with
the present instrument capability.
h. No error (in word position) in the recorded data
can be tolerated. The actual mechanical reversal of scans
should occur as dictated by mechanical considerations, pro-
viding turn around time is reasonably optimized.
i. The start and stop (in terms of recorded data) must
be exactly repeatable to the data word. In other words, the
scan will be measured in terms of the number of data words
contained therein. The data words will be synchronized
with the sample interval which is accurate as specified
above to one percent of the subdivision interval.
j. Machine direction accuracy is not applicable - see
preceding paragraph.
k. Smallest effective slit presently required to scan
black and white film is 0.5 by 4+0 microns.
1. Smallest effective slit presently required to scan
color film in the trichromatic mode or in the black and
white mode is 1 by 1+0 microns.
M. See paragraph 1.
n. Smallest effective spot presently required to scan
black and white film is one micron in diameter.
o. Smallest effective spot presently required to scan
color film in the trichromatic mode or the black and white
mode is two microns in diameter.
p. See paragraph o.
q. The types of color film that we will analyze in
the trichromatic mode and/or the black and white mode may
include; S0-108, S0-121, S0-271, SO-276, So-180, S0-151,
S0-282, 5021, 5029, 5030, and 5033.
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TSSG/TAD-131/68
SUBJECT: Modification of the 1032T Microdensitometer
r. See paragraph q.
s. From a TAD/ISAB viewpoint, the justification of
fund expenditures for each of these modifications would
be dependent on the NPIC standard for quality of work and
its corresponding dollar value. These modifications were
requested for reasons stated in memorandum TSSG/TSD-010/68.
To reiterate, the present sample rate does not meet the
requirements of current analysis techniques, the present
scan length produces excessive and unnecessary recorded
data, and the color focus problem produces data which
preclude any valid evaluation of color materials. Each
of these discrepancies tends toward inefficient operation
of the instrument and no attempt to improve the situation
indicates a lackadaisical attitude of professionalism. In
keeping with the recently expounded concern of the NPIC
management for a more objective evaluation of materials,
the ISAB believes that obtaining these modifications
represents one step in the right direction. Because the
reasons for requesting the modifications are invariant
with respect to management, justification to the DDI would
entail only a repetition of what has been stated in this
and past memoranda. Because the ISAB does not have a
capability to evaluate the cost of one electronic circuit
versus another, we cannot specify a maximum expenditure of
funds but can only agree with the least expensive modifica-
tion which meets our requirements, and ultimately with the
dictates of NPIC management. The ISAB is aware of a
modification Proposal from (May 1967) for
amp e re on y, proposal
from (November 1967) for modification of
both the sample rate and scan length, and discussions con-
cernin modification of the optics at a cost less than
The ISAB confidently relies on the expertise of
to decide upon the best approach to resolve the problems.
Chie , TecHnical Analysis Division
NPIC/TSSG
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Distribution:
Orig -
Addressee &-'
1 -
NPIC/TSSG/TAD
1 -
NPIC/TSSG/TAD/ISAB/DAS
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SECRET,