The shaping and testing of two 20-inch optical telescope mirrors
Вставка
- Опубліковано 27 сер 2024
- Presented by Johann Swanepoel at the ASSA Symposium, 2012 October 13, at SAAO in Cape Town.
"The purpose of the presentation will be to share my experiences and knowledge gained in the making of two 20-inch f/4.3 telescope mirrors. It will cover details of a versatile machine that was built for the grinding, polishing and figuring of the mirrors. It will further include details of the various full and sub-diameter tools that were made and used. An explanation will be presented on the optical testing methods used throughout the figuring process, including an improved application of the Foucault test and the corresponding digital data reduction techniques."
Visit the official symposium website for further details:
symposium2012.a...
Excellent video. Thank you for posting it. 20 inch is just too big and heavy to do by hand.
Great talk Johann
Nice Job!
Awesome vid. Please consider writing a book.
What is the quality grade obtained for the mirrors ? What the costs for a finished mirror?
Can you tell us about the mods to the webcam and improvements to slitless tester ? Thank you.
Will the MirrorProfile software ever be available for amateur telescope makers?
Who interrupted him at 34:00 when he was just warming up? Fortunately I can rewind but did they need to cough so much? Maybe someone embarrassed at persuading him to use smaller tools when in fact optical slope is the issue. /o\...or maybe not...\o/