COMMENTS ON(Sanitized) MICROSCOPE PROPOSAL

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A002300080008-1
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: December 3, 2001
• Sequence Number: 8
• Publication Date: December 27, 1966
• Content Type: MF

Approved For Release 2002/01/02: CIA-RDP78BO474
IPO/OSB/M-188-66
27 December 1966
MEMORANDUM FOR: Assistant for Technical Development, NPIkk
ATTENTION:
SUBJECT:
croscope Proposal
1. The proposal entitled "Micro-Stereoscope and Binocular Micro-
scope Contract Design Phase I" has been reviewed an the follow-
ing comments are forwarded for your consideration.
a. The field of view of this microstereoscope/mLroscope is
smaller than the field of view of the Zoom
7 . This is a
serious reduction in area coverage. must be ealized that the
larger the field the more information the PI canllobtain from a
single stereo or mono examination of imagery.
b. On page 18 it is stated that at the 4X zoom osition there
will be slight spherochromatism and dominant seco dary color;
at the 2X zoom a secondary chromatic aberration is dominant
and at 1X zoom the secondary chromatic aberratio is far larger
than the spherical aberration. On page 19 it is stated that
lateral color is completely removed by the hyperciromatic
field lens. On page 14 however, the Field Lens i stated as
having a capability for correction of small, resi ual lateral
color resulting from the zoom system. These incompatible considering the varying roements seem
g degrees of atf c romatic
aberrations present at the different zoom setting.
c. The resolution figures on page 20 indicate th 1X zoom
to have very poor resolution at the 0.7 and 1.0 f eld positions
in comparison to other objective and zoom setting - for similar
magnifications. Since the 1X zoom would be used initially during
scanning to a greater extent than the 2X or 1+X zoom combinations;
better resolution than the 2X or !+X zoom would be~even more
desirable.
Declass Review by NIMA / DoD
Approved,For Release 2002/01/02 : CIA-RDP78BO4747AO02300080008-1
25X1A
25X1A
25X1A
25X1A
 Approved For Release 2002/01/02 : CIA-RDP78BO4747AO02300080008-1
SUBJECT: Comments on Microscope Proposal
25X1A
2. Colson of the 2X rhomboid/Zoom 70 nnm'hi nn+i nrl a,,,a +i,,, 25X1 A
?
0
vllc L.L W..L
designed indicates that no great advantage in reso ution capability
i s -Pn'ri-l, r nm , ri(r
a. It is assumed that the better the resolution contrast capa-
bility available to PAG, the better the possibili y for accurate
and timely photographic interpretation.
1. The resolving power of an individual's eye can reach 10
line pairs per millimeter at high contrast, with the average
approximately six lines per millimeter; the s ecifications for
the contract state five line pairs per millimeter as 25X1A
an o Jective - on axis, or less than the ave ge individual
is capable of seeing. Why would it not be po sible to ad-
vance the "state of the art" and produce something better
than what is presently contemplated?
2. PAG has not had a firm commitment from an source stating
what resolution/contrast capabilities are actually required
to facilitate interpretation of imagery. 25X1A
b. The Zoom 70 has been in use f r approximately
ten years. is ins rument has been improved to provide better
resolution by developing 2X and advanced rhomboid which will
conceivably raise the resolution to 250 line it per millimeter
25X1 D
using the lOX eyepieces
It is the opinion of the Photographic Analysis Gro
design should be improved by using specifications t
n urate with improvement of the state-of-the-art
espec
resolution/contrast values are concerned. Since the equipm
measure the modulation transfer function of microscopes wil
axis and field angle responsep, it is requested that the Zo
p that the
t would be
dally where
nt used to
provide on
m 70/2X
25X1A
Approved For Release 2002/01/02 : Cho-RDP78B04747A002300080008-1
 .: Approved For Release 2002701/02 : CIA-RDP78BO4747AO02300080008-1
SUBJECT: Comments onwicroscope Proposal
rhomboid combination or other available microscope be co:
the proposedesign. This information will then
development o a final design of th
that will result in a unit superior
.pared to
nable
microscope
ing equipmen~.
25X1A
25X1A
25X1A
25X1A
Assistant for Photograthic Analysis, NPIC
?
Distribution:
Orig & 1 - Addre
1 -
1 - Ass or
1 - Chrono
25X1A
Approved For Release 2002/01/02 : CIA-RDP78BO4747AO02300080008-1
 25X1A Approved For Release 2002/01/02 : CIA-RDP78BO4747AO02300080008-1
Approved For Release 2002/01/02 : CIA-RDP78BO4747AO02300080008-1