T&E REPORT NO. 70-10 ON THE(Sanitized)2X OBJECTIVE FOR THE ZOOM 240R STEREOSCOPE SYSTEM IN MONOSCOPIC MODE

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05171A000600010017-5
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: March 30, 2004
• Sequence Number: 17
• Publication Date: October 6, 1970
• Content Type: MF

Approved-For Release 2004/05/05: CIA-RDP78BM71A000600010017-5
NPIC/TSG/RED/SDB-01+7_70
6 October 1970
RANDUM FOR: Chief, Engineering Support Division, TSG
ATTENTION
THROUGH
SUBJECT
Chief, Technical Evaluation Branch, ESD/TSG
Chief, Research & Engineering Division, TSG
ME Report No. 70-10 on the 0 2X Objective for the
Zoom 24OR Stereoscope System in Monoscopic Mode
1. This is a good, objective report. The format of detailed re-
quirements, results, and procedure makes for ease of reading and under-
standing. The progression from Introduction, Sugary of Results, etc.,
good.
2. Some specific comments follows
a. The hbstract states "...that the device is suitable for
procurement subject to modification." Paragraph 3.1 concludes that
"The device is considered to be acceptable to NPIC for procurement
in its present condition and configuration." Perhaps rephrasing
would remove this apparent contradiction.
b. Paragraph 3.2 (b).
lenses are coated,
c. Paragraph 2.1.2 reports that "The 2X Objective is not
parfocal..." The 240 system is far from parfocal within itself.
1X mono vs. 2X stereo is parfocal, IX mono vs. 0.5X mono is not par-
focal by 3 3/8 inches. Probably the important point of this state-
ment is that the 2X Objective lens is parfocal with the 2X stereo
mode. Also, can you realistically visibly determine the point of
best focus to 0.001 inch? As a guess, depth of focus for the system
is perhaps at least three times this much.
d. Paragraph 5.1.1 (e). The meaning is not clear.
separation is determined by rotating the arms. The statement says
that the arms are restricted in rotation, yet minimum and maximum
separation does not change.
Declass Review by
NIMA/DOD
Approved For Release 2004/05/05 : CIA DR A000600010017-5
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 SECRET
ApprovedSor Release 2004/05/05: CIA-RDP78B171A000600010017-5
SUBJECT: T& Report No. 70-10 on the F -12X Objective for the Zoom 240R
Stereoscope System in Monoscopic Mode.
e. paragraph 5.1.2 states that "It is desirable that the 2X
Objective be parfocal with the Zoom 24+OR Stereoscope System."
This is not possible since the 2 system is not parfocal within
itself. Again, the important point probably is that 2X Objective
and 2X stereo is parfocal. Indeed, any reporting of parfocality is
a reporting of the pod/lens system and. not a reporting of the 2X
Objective itself..
f. Paragraphs 5.2.2 and 5.3.2 (d) These paragraphs raise the
question as to whether the system would remain in focus when using
a cover glass.
g. Paragraph 5.3.2 (e) reports a resolving power of eight
lines/mm/power, whereas Paragraph 5.2.5 reports approximately five
lines/mm/power.
SDB/ /TSG PIC
Distribution:
Original - Addressee
I - SDB/RED/TSG/NPIC
1 - Pro ect Monitor
NPIC /TSG/RID/SDB
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