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Re: [ATM] Autocollimation Oil Test


From: "Arjan te Marvelde" <arjan.te.marvelde@hetnet.nl>
To: <atm@atmlist.net>
Sent: Sunday, January 22, 2006 12:49 AM
Subject: Re: [ATM] Autocollimation Oil Test


> Martti,
>
>> I have tested with grate success mirrors up to 700 mm in Diameter using
> oil
>> as reference flat. You can even use your favorite salad oil.
>
> Is there any specific reason you are using oil?
>
> Arjan te Marvelde
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>

Oil has a much higher reflectivity than water.  Mercury would be ideal, but 
having a couple of gallons of liquid Mercury in an uncovered pan might not 
be a good idea.

Steve
 

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