Re: [ATM] Focault Problem

[Ken Lowther <hermit@outofoptions.org>]

I see diffraction lines in a slitless tester. ;-)  Not bad and NOT when I am
doing the actual shawdow testing.  Inside and outside the test range when the
blade can be seen as a sharp edge on the full brightess mirror.  It never
ocurred to me that others didn't get them, till now...

Ken

Quoting Jeff Anderson-Lee <jonah@eecs.berkeley.edu>:

> What about making the slit wider?  Shouldn't that reduce the diffraction?
>
> Jeff
>
> Ken Lowther wrote:
>
>> Quoting Bob May <bobmay@nethere.com>:
>>
>>> I often see a set of diffraction lines when I put my eye to the KE but,
>>> oddly enough, have never seen them when using a camera.  I don't know why,
>>> it just is with me.
>>
>>
>> No.  I see them too, but now when I get to the point where I can see the
>> shadows.
>>
>> Hermit, holed up in Youngstown, Ohio
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>
>
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Hermit, holed up in Youngstown, Ohio
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