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Curated by: Huygens Optics (81 videos)
How do telescope mirrors create an image using wave interference? The video uses simulation to discuss how this works. At the same time it describes the effect of aperture diameter, wavelength and aberration frequencies present in the reflective surface. 00:00 Intro 02:23 Limitations of the simulations 06:09 Parabola vs Sphere 08:11 Maximum resolution limited by Aperture 09:38 Minimum angle of separation explained 11:09 Maximum resolution limited by Wavelength 12:36 Minimum distance of separation explained using interference 16:56 How spatial frequency errors influence image quality 23:51 A wave bouncing of a rough surface All simulations were produced using a script by @DiffractionLimited as a basis. Thank you Manuel for making this very useful piece of software! If you want to try this yourself, please download the scripts here: https://github.com/0x23/WaveSimulator2D I used a short clip from a video by Omroep Flevoland on telescope making at the astronomy club in Almere featuring Jan van Gastel and others. You can watch the full video here: https://www.youtube.com/watch?v=PWwlsTCvhLw This is a link to another video I made a few years ago on the angular resolution of telescopes: https://www.youtube.com/watch?v=gOpbXBppUEU&t=287s If you want to know how to measure surface roughness using White Light Interferometry, I recommend this video about the subject: https://www.youtube.com/watch?v=yMeRAg61_Wc the surface roughness plots were made using Gwyddion. download Gwyddion from: https://gwyddion.net/ If you want to measure surface roughness down to the atomic resolution using optical principles yourself then watch how to do that in this video by @cylosgarage: https://www.youtube.com/watch?v=uvxDJ61e9xE End music: "More to Light". © JJM Vleggaar / Earlybirds (2000)