RE: ATM ? post

["Shope, Todd -Systems" <todd.shope@ssc.de.ittind.com>]

> I am curios, I understand the substitution, but i posit that the contrast
of
> the image was not as great as the KE. Is that true?

This was used on a space-borne telescope. I don't remember the exact science
involved, but I believe it was investigating the spectrum (maybe UV) in the
tail of Halley's comet. The name of the mission was SPARTAN Halley.
Unfortunately, it met a fiery end as it was aboard the Space Shuttle
Challenger in 1986. 

I can say with some confidence that the knife edge effect worked. The
instrument was tested and calibrated and met the principle investigators
specs. May not work well for visual, dunno.

I suppose that a KE can be modeled as a cylinder with a very small radius.

Todd Shope, Software Engineer
ITT Industries, Inc., Systems Division
PO Box 740, State College, PA  16804
(814) 466-6275 Voice, (814) 466-7681 Fax
todd.shope@ssc.de.ittind.com <mailto:todd.shope@ssc.de.ittind.com>