how optical filters are made

Discussion in 'Miscellaneous Equipment' started by AgX, Aug 26, 2013.

  1. AgX

    AgX Member

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    Shown at the german manufacturer Heliopan.

    Most probably nothing that surprises you, but maybe nice to see:

    http://vimeo.com/67566198

    advance to 11:20 to start video
     
  2. Ricardo Miranda

    Ricardo Miranda Member

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    Thanks!
     
  3. AgX

    AgX Member

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    I admit I was surprised to learn that each filter is polished seperately. I expected them to be cut from a polished plate. Though, that would necessitate quite some effort to keep the main surfaces unharmed during breaking and edge grinding.
     
  4. E. von Hoegh

    E. von Hoegh Member

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    The thickness is critical, it's what determines the density of the finished filter. Also, it's probably more ecomonical to maintain plane/parallel surfaces when polishing individual filters on a block.