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Re: [ATM] Tester question.

To: <atm@atmlist.net>
Subject: Re: [ATM] Tester question.
From: "Bob May" <bobmay@nethere.com>
Date: Sun, 17 Jul 2005 10:32:43 -0700
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Turning the slitless tester into a slit tester doesn't really affect
anything except the brightness of the unocculted mirror return.  I do it
myself a bit just so the return from the mirror under test isn't too bright
in the camera's image.  I leave the slit about -020" or so (never measured
it) so that I can also do Ronchi tests just by placing a grating in front of
the KE and aligning it with the direction of the KE.  This sharpens up the
lines of the Ronchi test a bit and darkens it to where the camera can handle
the light as well.
Bob May
bobmay@nethere.com
http://nav.to/bobmay
http://bobmay.astronomy.net

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References:
- [ATM] Tester question.
  - From: John Moore <jamoore42@yahoo.com>

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