From Cooktop to Optical Part

This video shows how you can use the material from a cooktop to make zero-expansion glass-ceramic optical parts.

CONTENTS
00:00 Intro
00:22 On glass-ceramics and thermal expansion
02:25 Cutting, grinding and optical polishing of Ceran and Robax
10:15 Optical configuration of a Newtonian telescope
12:18 Making a flat secondary
18:37 Making a parabolic primary mirror
30:40 A quick look through the "telescope"
31:54 Outro

LINKS:
Some images used are copyright of Schott, ESA and the Max Plank Institute:
https://www.schott.com/en-nl/expertis...
https://elt.eso.org/mirror/M2M3/
https://www.mpia.de/institute/researc...

DOWNLOADS:
DFTfringe Interferometry software by Dale Eason: https://github.com/githubdoe/DFTFringe

MUSIC:
08:25 "Sizzr" by Schwartzy taken from the Youtube music library
21:10 "Pump up the Jam" by Technotronic (short clip from    • Technotronic - Pump Up The Jam (Official M...  ). According to those in the know,THE most influential musical milestone of the 20th century:    • Every 'Pump Up The Jam' Segue - Philomena ...  
31:54 More to light by the Earlybirds and Liam F. (Trippy Joint Remix by Jerome)

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