Understanding The Ronchi Patern. - an Astronomy Net ATM Forum Message

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Understanding The Ronchi Patern.

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Posted by Greg Tedford on November 16, 2002 22:01:59 UTC

I have just finished an 8" F/8 mirror and made a ronchi tester but can't work out how to polish the parabolic shape into the mirror.

My tester shows perfectly straight lines so i have a good concave mirror but i know i need to have the bands bowing out from the centre.

How do i modify my polishing technique to achieve this?

Follow Ups:

RE:Understanding the ronchi patern. - optics - November 17, 2002 - 00:53 UTC
Making the parabola. - bobmay - November 17, 2002 - 01:34 UTC
RE: Understanding the ronchi Pattern - tpicciani - January 2, 2003 - 23:56 UTC

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