Re: [ATM] 16"RCC mirror

[Attila Schné <yolo@chello.hu>]

Tuesday, January 24, 2006, 2:37:30 PM, you wrote:



RR> --- Attila Schné <yolo@chello.hu> wrote:

>>        I think I will finish the mirror using the
>> screen method, And
>>        than I will make a Ross lens from the
>> secondary just double
>>        check the primary. What is going on when the
>> secondary back
>>        surface is not quite flat?

RR> Depends by what you mean by "flat".Ideal situation is
RR> to get the back optically flat,but as long as the back
RR> isn't grooved or has a wedge to it it can work.Did a
RR> 12 inch cass that used a 2.2" secondary of pyrex and I
RR> just used the back as is.Wedge is the biggest
RR> concern,just get a smooth surface say by grinding with
RR> 400 or 600 grit and polish till it's clear.

RR> Ric


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Hi Ric,

Thank's ! I will report about the results!

-- 
Üdv:
Attila Schné
                          mailto:yolo@chello.hu

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