[HANDWRITTEN NOTES]

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000400030058-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 7
• Document Creation Date: December 28, 2016
• Document Release Date: June 7, 2005
• Sequence Number: 58
• Publication Date: May 27, 1971
• Content Type: NOTES

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The following is the understanding of the conclusions reached regarding the require-
ments to be added to the MLT 1540-4 light table determined at the meeting of
27 May 1971 between
ment representatives.
representatives and the U . S. Govern-
1. The lock of the microscope carriage in the x direction is satisfactory as presently
exists.
2. The lock in the y direction of the microscope carriage is satisfactory when the
cross rod is locked.
3. Less difference is required between the x and y speed when bridge is motor
driven. A differential not greater than 2:1 is satisfactory.
4. A smoother movement to the bridge is required, i.e., elimination of speed
variations and jerky movements.
5. An average force of 1-1/2 ? 1/2 lb. manual carriage movement is desired.
6. Reduction in the low speed break-away, i.e., bridge movement should start
at a very low speed rather than starting with a large step.
7. A means of accurately pointing, i.e., aligning reticles with points on the film.
This could be accomplished either with the motorized bridge drive, or preferably
with a mechanical manual control. Trade offs between the minimum bridge motor
driven speed with easily controlled manual drive may be made.
8. Quantitative requirements are listed on attached sheet.
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PHYSICAL CONSTRADTI'S - ' !.5110 TABLE
1. Maximum allowable downward deflection of .0045" with two (2) pounds
pressure applied to top front of. optics mount.
2. Carriage lock in X and Y within following limitations:
,Pouunds Pressu:ce Ap -11-ed
Allo w,able Movement
2
.005
-- .01011
4
.010
- .020"
6
.020
- .035"
6- -I_o
.035
- .070"
3. Average force of 1 2 lbs. (+ or - 2 lb.) required to manually move
carriage in X & Y directions.
4. Electrica:. carriage movement (scan speei) continuously variable
within the ra: ,ge of .002"/sec. - .250" (or greater)/sec. in both X and Y
direction. Maximum allowable speed differential between X and Y directicn
at same speed setting is 2 times. Drive will respond at all speed
settings with)ut adjusting settings.
5. Mechanica:. carriage movement capable of smoothly moving optics moun+
in X and Y di;,ection at minimum hand driven speeds of .001 in/sec.
. Approved For Release 2005/06/23 : CIA-RDP78B05171A000400030058-7