HIGH PRECISION STEREO COMPARATOR PROGRAM

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000600010067-0
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: March 31, 2004
• Sequence Number: 67
• Publication Date: April 20, 1970
• Content Type: MFR

Approved.. For Release 29 997 TCIA-RDP78BG5171A000600010067-0
Q SS*/.020-70
Q April 1970
SUBJECT:
ion Stereo Comparator Pro;
ner al Manager of 0 telephoned the technni-
fra monitcsx` w:nnd pissed sane te e attthe information
Pl.aantein ac0perfor~irs
from .{.
the ccep nce tests on a ~:ei.optical system.
2 1 3-10 ,pril 1970,
mostly on the main sc,.::nnminn?; branch 0
f
ran some tests, but these r
optical system.
The reticle branch has had major rework done on It and had
not been instilled in the optical system until the week - A 13 April 1970.
Tice optic i potentiometer parameter tests, the final tests of
the fully ~. + sembled optical system, will start between the `) to 27 ."April
and will be completed by 14 to 6 May. These tests exercise all the c .n_
ponent s and subsystems of the optical system.
a
3 to 10 working days
3. The delay in the tests have been due to problems with: the
reticle branch, limit switches, and the main as system.
v
been completely redesigned and
h
as
n. The reticle systems
rebuilt in the -ast two months. Tt.e original reticle was un.iccept-
able clue to ill defined edges. II states that the new reticles
look good, but the range of reticle sizes All h ve to be limited
to 2.5 times diffrac t? on limit (Specs called for juzt bo aove d -c~
fraction limit to 14 times diffraction limit). Just
ter - in the al one of t': e eye_
Lion limit gives a lot of 35 micro--
t dot sire of 1 /it Uzi c
piece. This will give .af equivalen
at the film pl .ne at 200X m if`?ic .tion. This is based o
method of computatiozn%
Declass Review by
NIMA/DOD
x.
0
to pack the
MY now expect to ship the optics by ..air freight on 19 ay
_.., , ...1 a"wa t l In shin on 30 April.
Approved For Release 2004/01 ", RDP78B05171
~ Gecf:.==tie" `r:lti '!e!t3:ila(!~
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 Approved For Release 2004/05/05 CI4-RDP78B,a171A000600010067-0
High Precision Stereo Comparator Program
Example: 3 _ U - 1.75
At 2.5 diffraction limit the size of reticle in the plane of the
eyepiece will be 88 micrometers. This will have to be discussed
with IEG/PIED.
b. There have been some problems with interference with the
limit switches but this is being resolved.
has been working with ~to insure that the moving
operation. At one point, two elements move to within 2 thousandths
of an inch of each other and safeguards must be installed to prevent
their ever colliding.
IS has run resolution tests on the main scanning system with
both the and 80mm objective lenses. He reports that both exceed
specifications. He also reports that some vignetting is visible at 20X
in the 20X to 20OX zoom range. He would like to know if limiting this
zoom range to cover 25X to 20OX and keeping the other range from lOX to
10 OX is objectionable to NPIC. This will also have to be resolved with
lEG/PHD.
In regard to the correlation system have agreed
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on the main points for an acceptance test gill start the acceptance
tests at the 0 plant on 21 April 1970.
6. The slippage in the optical schedule will cause the entire
program to slide. A new schedule will be produced for preacceptance
tests at when more is known about the results of the optical tests.
The start the preacceptance tests a'Iwill definitely slide from
15 June until sometime in July or August.
7. The technical monitor will visit "from 27-29 April 1970.
At this time it is hoped that firm training and test schedules can be
worked out.
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Distribution;
Original - Route & File
IAPp>~F
3... NPIC/PPBS {Att.
2 . IC/IEG/PPHD (C
2 - IC/TSSG ESD
EPIC/TSSG SSD
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