IAS COMMENTS ON NEW FOCUSING SYSTEM FOR(Sanitized) CHIP COMPARATOR

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A001700060024-3
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: February 24, 2005
• Sequence Number: 24
• Publication Date: May 19, 1970
• Content Type: MF

Approved Foo lease WAM,
t DP78B04771001700060024-3
S 003
19 May 1970
MEMORANDUM FOR: Chief, Research & Engineering Division, TSSG/NPIC
SUBJECT: IAS Comments on New Focusing System for
Chip Comparator
Although substantive imagery analysis requirements have pre-
cluded a thorough evaluation of the new focusing system, operational
use by four IAS PIs has brought forth subjective comments worth noting.
(1) Without question the new mechanism permits more precise
focusing, but (as per our discussion) there is an obvious need for
a different handwheel; one with enough friction to overcame the self-
induced rotation now exhibited on occasion.
(2) Another apparent shortcoming of the modification is the
instability of the viewing head. Even the slightest physical contact,
with the eyepieces for example, causes the image to jiggle. In fact,
quiver is quite noticeable when either of the translating motors is
in operation. While we may be able to tolerate this deficiency, im-
proved stability is considered desirable.
25
Technical Advi r .or, IAS
Declass Review by NGA.
 Approved For Release 2005/05/20 : CIA-RDP78BO477OA001700060024-3
TRANSMITTAL SLIP
I
DATE ' --
19 70
TO: Chief, RED/TSSG
ROOM NO.
5S 453
REMARKS:
FROM:
ROOM NO.
ON 41,
FORM 55 24 I REPLACES FORM 36-8 GPO: 1957-0-439445 (47)
WHICH MAY BE USED.