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

Document Type: 
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
Case Number: 
Publication Date: 
August 13, 1964
Content Type: 
REPORT
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PDF icon CIA-RDP78B04747A000200010036-0.pdf155.46 KB
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36-0 1 3 August 1964 GS:bb: 375 (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 o ea ~ STATINTL Approv-leclas eleas iew y 4NR%-8~78B04747A000200010036-0 STATINTL Approved For Release 2001/04/02 : CIA-RDP78BO4747A000200010036-0 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 ,%r 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 Approved For Release 2001/04/02 : CIA-RDP78BO4747A000200010036-0 -3- Approved For Release 2001/04/02 : CIA-RDP78BO4747A000200010036-0 STATINTL ATTACHMENTS: STATINTL Diffuse Density and the Mac-3eth Deusitometer, HFI:bb:359 7 August 1964 MEW ATIC*VTL Contact P eport Telephone Call to MM:bb:351, 3 August u 9 y 4 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 1 l 6 7. Intensity Stability of Laser Sources, 7 August 1964 _P-H:bb:362 STATINTL MJM:bb:335-jg, STATINTL GjTL WCT:S3ATUqTL Approved For Release 2001/04/02 : CIA-RDP78BO4747A000200010036-0 Appr St~~R?1 STATI NTL/ 7 001/04/02: CIA-R.DW8 5-1 A000200010036-0 7G tIlq&y STATINTL d Pr O?Z/en C?'Y" e` C /~ N'~ r ~,iy3,~y^y~~7.G~'1^+,CSLILLEFFF/~//'IJV ? 7 9) Approved For Release 2001/04/02 : CIA-RDP78B04747A00020001-0036-0