LETTER (SANITIZED)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP79B00873A002000010027-3
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 1
• Document Creation Date: December 28, 2016
• Document Release Date: November 8, 2012
• Sequence Number: 27
• Publication Date: January 6, 1967
• Content Type: LETTER

Declassified in Part - Sanitized Copy Approved for Release 2012/11/08: CIA-RDP79B00873AO02000010027-3
g
(" *,)" C".4) IV R N ~ N %e 2"'
3900 ELECTRONICS DRIVE
ZIP 27604
TEL: 919 828-OS11
January 6, 1967
I hope that the enclosed "Discussion of Definitions"
reaches you in time for your study and consideration before
our meeting on the thirteenth.
Four areas which I feel are of particular importance to
both of us are the following:
1. Is the given definition of Gain (9) satisfactory?
2. Is the value of ?15% for the brightness variation
practical? Can a variation of 15% be detected visually?
What might be a-more meaningful requirement on bright-
ness. uniformity?
3. How should the sensitivity to ambient light be
specified and measured? How important are the spectral
properties of the projection and ambient illumination?
4. Is the proposed figure-of-merit meaningful? Are all of
the important parameters included? Should each parameter
be individually weighed?
MRS:ngw
Product Planning - Military
STAT
STAT
Declassified in Part - Sanitized Copy Approved for Release 2012/11/08: CIA-RDP79B00873AO02000010027-3