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Old 22-05-2021, 08:42 AM
legswilly (Werner)
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legswilly is offline
 
Join Date: Apr 2021
Location: Wauchope, NSW, Australia
Posts: 47
Quote:
Originally Posted by sopticals View Post
Hi Werner, I tried the "pillars between" experiment because I had past experience with the Hubble Optics "sandwich" mirrors (3 x 14") and they performed well. Anyway, was to subsequently obtain a large quantity of thicker (35-37mm) good quality plate glass so never had to try any alternative ways of bonding together thinner glass sheets.

Stephen.
Thank you for replying Stephen. Have already bought some glass and will try to epoxy together. I also want to build a auto collimation test stand and needed a flat mirror for it. Could not find one to buy, so will make one. Still need to go to Sydney to pick up the glass which is waiting for me.
Found a Ronchi eyepiece maker https://www.gerdneumann.net/english/...lar-5l-mm.html. He makes a 10lines per mm, which equates to 254 lines per inch. Is 254 lines too many? It's a lot cheaper.
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