(Sanitized) FIFTH MONTHLY PROGRESS REPORT JULY 1964 MICRODENSITOMETER CAPABILITY AND INTERPRETATION STUDY

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A000200010036-0
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: March 22, 2001
• Sequence Number: 36
• Publication Date: August 13, 1964
• Content Type: REPORT

36-0
1 3 August 1964
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(997-112)
FIFTH MONTHLY PROGRESS REPORT
JULY 1964
MICRODENSITOMETER CAPABILITY AND INTERPRETATION STUDY
This report covers activities through the fifth month of a study of
microdensitometer capability and interpretation techniques, which has as its
objectives: (1) the establishment of techniques which will enable a micro-
densitometer operator to use the instrument to its maximum capability and to
interpret the data therefrom accurately, (2) a survey of existing instruments
to study the most recent developments in microdensitometey, and (3) a study
of the feasibility and effectiveness of various advances in the state-of-the-art.
Each of the three tasks has been continued through the reporting
period. As of the end of the month, the percentage expenditure to date was
64%. STATINTL
I. Mensuration Procedures and Data Interpretation
The primary emphasis on Task I has been on mensuration procedures,
resolution and light source coherence effects, and grain scattering effects on
density determination.
The mensuration procedures are being written in the form of a hand-
book. Procedures for data acquisition, reduction, analysis and interpretation
are being included.
The initial part of an investigation concerning the characteristics of the
imacees of objects having finite edge widths has been completed. These results
are currently being analyzed and will be reported when the analysis is completed.
The study of dependence of measured density on source and detector
specularity was delayed when it was discovered that_ instrument for mea-
suring "diffuse density" did not do so. This is reported in Attachment I to this
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report. A call to the equipment manufacturer, reported in Attachment Z of
this report, obtained information concerning modifications which will be made
to correct the equipment. The diffuse densities will then be measured and
compared to densities measured at various numerical apertures. The results
of the measurements other than diffuse are reported in Attachment 3 to this
report.
H. Equipment Capability
Three trips were made to equipment manufacturers during the reported
STATINTL period, one each to
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the results of these trips.
Attachments 4, 5, and 6 to this report describe
M. Feasibility Studies
The analysis of sine wave and edge test patterns is nearly complete
and a. memorandum is in preparation.
Work has been initiated on the investigation of the use of a laser unit
as a light source for a microdensitometer. The results to date of this study are
included as Attachment 7 to this report.
An investigation is being conducted of the improvements possible in
the recording of edge traces by using narrow illuminating apertures. This
investigation will include both coherent and incoherent sources. The use of
coherent illumination in themicrodensitometer is being considered first.
Effort on the visual display was temporarily interrupted when it was
found that analysis of the optical system of the =instrument required infor-
mation from the optics manufacturer. A letter requesting the required Infor-
STATINTL mation was sent to As of the end of the month, no reply had
been received and a follow-up letter was sent. STATINTL
TINTL
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STATINTL
ATTACHMENTS:
STATINTL
Diffuse Density and the Mac-3eth Deusitometer, HFI:bb:359
7 August 1964 MEW
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Contact P eport Telephone Call to
MM:bb:351, 3 August
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4. Trip Report to
8-9 July 1964
5. Trip P eport to
MJM:bb:341, 2
6. Trip ceport to
31 July 1964
3. Variation of Density with Numerical Aperture,
31 J
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6
7. Intensity Stability of Laser Sources,
7 August 1964
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