A STUDY OF THE EFFECTS OF EXPOSING PHTOGRAPHIC MATERIALS WITH LASERS AND ADDITIONAL MINOR ITEMS

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001000030032-4
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: January 13, 2005
• Sequence Number: 32
• Content Type: STUDY

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Approved For.,,Release 2005/02/17 : CIA-RDP78BO4774DA001000030032-4
II was asked to investigate these possibilities and submit a, proposal
which spells out those changes which are possible, along with their relative
costs.
PLACE:
ATTENDEES:
DATE: 3 October
SUBJECT: A Study of The Effects of Exposing Photographic Materials
With Lasers and additional minor items
anticipated. A few of these problem areas are as follows:
there are many definite problem areas, some of which, we had not previous,
1. Detailed discussions were held concerning the possible
effects of exposing photographic materials with a.sers. as expected,
has some of the answers at present; however, our discussions indicated that
a. There are a number of additional items that may cause diffiYa.ctio
phenomena in addition to those we had considered; such as,
"Bubbles," gaps between base/emulsion and the base/gel, a.n variations
in thickness of the extruded base -- the fluid gate won't solve this
problem because the base and emulsion have different refractive indexes.
Estar base has a, greater variation than acetate.
Due to the polarized nature of laser light, stresses in the record
film could produce diffraction patterns. Since the film, in taking and
processing, is drawn through many tight radius turns, over rollers, etc.,
this places the external layers of the film (emulsion and gel) under
alternate compression and tension. These strains could introduce per-
manent stresses in the film.
b. The depth to which red light will penetrate the recording film
governs its scattering effects and, as a. consequence, its resolution.
There are some unanswered questions in this area.
c. As bases become thinner, and thinner, the heat retention of the
silver halide may become a, problem on dense negatives.
2. will submit a. study plan indicating which areas they feel re-
quire researc along with the cost and time considerations involved.
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Approved Foelease 2005/02/17 : CIA-RDP78B047'001000030032-4
3. 0 ha.s developed a, small "breadboard" to demonstrate contrast
inhanced viewing. The system uses back lighting along with ultraviolet
incident light. It does not appear very promising. I will send it to
NPIC shortly for our evaluation and comment.
4+. discussed the Teleprompter slide problem. has
taken some tentative steps toward a solution. New approaches were discussed.
1. NPIC should seriously consider an "upgrading" of the current
Zoom 70 and the development of a. zoom tube magnifier.
2. agrees that there are numerous gaps in their knowledge
concerning lasers and their effect upon photographic materials, and that the
proposed research study is both desirable and timely.
Development Branch, P&DS
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Approved For Release 2005102/1-7: -PIA-RDP78B04770A001000030032-4