How to make Very Flat Optical Surfaces on Glass

Comments · 516

• MC

  @mccallan2798 · 5 years ago

  I&apos;ve got absolutely no idea why this video was recommended but I&apos;m so glad it was.<br>Fascinating. Well done.

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• TO

  @tombesson7293 · 5 years ago

  This video reminds me of the optician who fell into a lens grinder and made a spectacle of himself.

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• TH

  @TheWtfnonamez · 5 years ago

  Totally counterintuitive. I&apos;ve done a fair bit of metalwork sanding and polishing, so I naturally assumed that optical polishing would be similar, only using something harder and flatter to grind the surface. It never occurred to me that the rotational grinding process would use something ductile, yet get better results. Thank you very much for the excellent explanation.

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• NB

  @NBuADGPaZ · 5 years ago

  How did I end up watching 12min of &quot;how to polish something to the nm scale?&quot; But you explained it so well that I understood it without any previous experience in polishing glass or anything for that matter

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• HY

  @hydrocarbon82 · 6 years ago

  Flat-out the best vid on making flat optical surfaces! Clearly thought out well, I couldn&apos;t pitch in any criticism. It&apos;s almost like we&apos;re on the same wavelength.

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• TO

  @tomtang2639 · 5 years ago

  jeez why didnt youtube algorithm recommend this to me earlier??? Its fascinating!!

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• TI

  @TickyTack23 · 5 years ago

  This is really good, so well detailed. It seems over the years there has been a lot of demonstrations of optical grinding/lapping, lots of &quot;recipes&quot; so to speak, without any detailed explanation as to why it works. I&apos;m coming out of this with a deeper understanding of the process, only took 12 years, but better late than never!

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• MI

  @MimicGriphon · 5 years ago (edited)

  Am I the only one that loves this type of stuff, but at the same time, completely understands how boring most people probably would find it?

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• ST

  @stickyfox · 5 years ago

  I used a machine like this in the 90s to flatten hydraulic motor parts. Instead of pitch, the wheel surface was steel, and the surface was kept flat by adjusting three rings which also kept the parts in position on the wheel. We&apos;d check it a couple times a day by washing the abrasive off and placing an optical flat on the wheel. But other than that it worked the same way.

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• DU

  @Dukey8668 · 6 years ago

  I have been interested in optical engineering for a long time now and yours is the first channel I have seen that covers it well. So thank you for making such excellent videos.

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• NU

  @nuramd · 5 years ago

  Today is the day i understood why tires have grooves

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• TO

  @tottedpotato · 5 years ago

  Hello youtube algorithm...thank you for suggesting something I didn&apos;t know i needed to know

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