Re: ATM surface accuracy

[Hugues.Laroche@ses-astra.com]

Hello,

>can anybody tell me how to measure the surface accuracy of a mirror less
than (lambda/4)
 >I have a referance flat of (lambda/20) and (lambda/10)

... so I assume the mirror you want to test is also a flat?

I can point you to a good web site:

http://serge.bertorello.free.fr/plan/plan.html#controle

sorry it is in French.

If your reference flat is 1/20 wave (on the wavefront or the surface?) you
might test the other flat to about the same accuracy with the fringes
method.
I am on my way to apply this method but my disks are not fine-ground yet,
so I cannot commnet further.

Best regards,

Hugues




--
DISCLAIMER:
This e-mail contains proprietary information some or all of which may be
legally privileged. It is for the intended recipient only. If an addressing
or transmission error has misdirected this e-mail, please notify the author
by replying to this e-mail. If you are not the intended recipient you must
not use, disclose, distribute, copy, print, or rely on this e-mail.