Making a Monolithic Telescope Part 2: Machining Glass

The second video in the series about manufacturing a small solid telescope. Time to make my hands dirty while doing artisanal stuff. CONTENTS: 0:00 Intro 0:46 The monolithic version of the Cassegrain 2:23 About baffles and stray light 3:18 Drilling the glass core 6:00 Radius milling the glass surfaces 9:35 Calculating the Best Fit Sphere in Excel 13:52 Drilling baffles 14:23 Using spherometers 15:44 This Beat is Spherotronic 16:31 Rough / fine grinding 18:05 Optical Pitch polishing 20:43 What’s next? 22:05 Looking through the uncorrected device 23:34 Thank you! Previous video in this series about the theory of aspherics and optical design: Video on the concept of the monolithic telescope featuring inventor Rik ter Horst: Video about radius grinding and the Loh CNC: More about the properties of optical pitch: You can support Huygens Optics on Patreon: Download URL for zip-file containing the example MS Excel sheet for doing BFS calculations: Windows program for calculating milling angle and evaluating spherometer readings: Download and use at your own risk. Your virus scanner will probably evaluate this download carefully and scream murder and fire because it is a rarely occurring executable. I used a few short clips from the following Youtube videos, assuming it is covered under “fair use“ by placing references to the channels, and links to the corresponding videos in the description. At 15:44, I made an 18 seconds remix of Technotronic’s hit “Pump up the Jam“. Please enjoy the original hit song by these Belgian techno pioneers: At 23:21: Shot take from Edmund Optics video “How an Aspheric Lens is Made“: Did I forget to mention you here? Let me know and I will set things straight.