Stellafane 2008 - Al-Paslow
Here's a shot looking down the testing tunnel to where the telescope mirror you want to test would be. If you were polishing a telescope mirror you would place it within this chamber, face up towards us on edge, with the mirrors back vertical against the mirror stand shown.
The stand has a knob to adjust the height of the mirror and it can also be adjusted from side to side so light coming down the tunnel from the Foucault tester will shine on it.

Here's a shot looking down the testing tunnel to where the telescope mirror you want to test would be. If you were polishing a telescope mirror you would place it within this chamber, face up towards us on edge, with the mirrors back vertical against the mirror stand shown.
The stand has a knob to adjust the height of the mirror and it can also be adjusted from side to side so light coming down the tunnel from the Foucault tester will shine on it.

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