[ATM] Quartz test

[GARY FUCHS]

Mike,

Thank you for the photos and explanation. Your site's been helpful to me with several things. I hope you don't mind some questions:

For the transmission test with the 4.25" scope, how far away is the quartz from the scope and laser? Does it matter? Do you need to move the quartz to have the laser go through different areas? I'm assuming you don't view the laser/star image directly - is that correct? Also assuming the laser isn't centered - does it matter where it's positioned as long as the beam clears the spider?

Thank you,

Gary Fuchs

>
>On another note.....
>
>I just finished making up a web page about a quartz disk I was asked 
>to test.  I used mechanical measurement, contact interference testing, 
>my collimator and a small telescope, and my reference sphere.  As I 
>thought many of you might be interested, here's a link:
>
>http://bi-staff.beckman.uiuc.edu/~melockwo/mirror_making/q6_test/q6_test.html
>
>	Mike Lockwood
>
>
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