ATM Forum Message | |
| Forums: |
Atm ·
Astrophotography ·
Blackholes ·
Blackholes2 ·
CCD ·
Celestron ·
Domes ·
Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem |
|
|
|
|
||||
|
|
||||||
Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place... The Space and Astronomy Agora |
| Re: Ceramic Blanks
Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To Posted by Robert May on April 27, 1999 19:30:32 UTC |
I've seen the blanks up at RTMC and they should work well. The low expansion should allow for a very stable mirror. The prices aren't too far from the price of Pyrex so it should be easy to go for it. I have no projects that need a blank at the present so I haven't tried them. BTW, are you sure that that 12" mirror is TEMPERED??? I would suspect that it would be annealed to keep the shape regular when it gets hot. Tempering a piece of glass puts it under tension and sudden heating would cause fracture at worst and annealing at the least. |
|
| Additional Information |
|---|
 |
| About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy |
|
Unless otherwise specified, web site content Copyright 1994-2024 John Huggins All Rights Reserved Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" are trademarks of John Huggins |