Re: [ATM] Foucault images

[Mike Lockwood <melockwo@uiuc.edu>]

Ken,

Ken Hunter wrote:
> I'd try rotating the 3X telescope and then the slit itself to see 
> which has an effect on the image. If it rotates with the slit, has 
> to  be a diffraction effect. If the rotation is with the 3x scope, 
> possibly non- homogenous glass element???

As I mentioned in a previous message, the line definitely "rotated"
with the eyepiece of the scope, and the condition improved when the 
eyepiece was cleaned.  I can't easily rotate the objective to see if
that affects it.

> When you rotated the camera, did the lines line up in the same 
> orientation as the camera or the mirror?

The lines stayed fixed with respect to the mirror, and did not tilt
with the camera.  Also, after seeing the lines visually I can 
definitely say it is not a camera-related phenomena.

My next step will be to get the objective and eyepiece super-clean and
see if the lines have gone away.

I will also see if they rotate with the slit, and I am fairly sure
they will.

Thanks to everyone for their suggestions.

	Mike L.

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