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  • 1 Post By 7mmwsm

Thread: Very Cool. how flat is flat? Even when making lenses for scopes

  1. #1
    Join Date
    Mar 2019
    BC Canada

    Very Cool. how flat is flat? Even when making lenses for scopes

    The scope /optic stuff is arounf the 8:00 mark

  2. #2
    ebf is offline
    The gnome returns ! ebf's Avatar
    Join Date
    Jun 2012
    Hutt Valley
    Juice, have a look at some of the videos posted by Tom Lipton (OxTools)

    He has several very interesting videos about surface plate calibration (down to millionths of an inch) as well as lots of practical videos about lapping and the use of optical comparators and showing interference fringes.

    Viva la Howa ! R.I.P. Toby
    Black rifles matter...

  3. #3
    Sending it Gibo's Avatar
    Join Date
    Feb 2013
    The Hill
    He wont hear ya......

  4. #4
    Member 10-Ring's Avatar
    Join Date
    Feb 2014
    Middle Earth
    The lenses groups in the then West German made Zeiss Diatal and Diavari scopes of the late 80's were held together by molecular adhesion measured in the millionth's of an inch. Similar to how Johansson blocks work. They weren't cemented together.
    "The 257 Roberts, some people like to call it the .257 Bob. I think these people should be hung in trees where crows can peck at them." - David Petzal

  5. #5
    Lovin Facebook for hunters kiwijames's Avatar
    Join Date
    Feb 2012
    Hawkes Bay
    I didn't look at the video but I recall one of our seal suppliers advising us the surfaces of their mechanical seals are measured in lightbands for flatness. Sounds techhy. I liken it to how @10-Ring describes this as we can often pick up one part of the seal with the other just by mating the two faces together.
    The Universe is a cruel, uncaring void. The key to being happy isn't a search for meaning. It's to just keep yourself busy with unimportant nonsense, and eventually, you'll be dead. -Mr Peanutbutter

  6. #6
    Join Date
    Mar 2012
    South Waikato
    Quote Originally Posted by Gibo View Post
    He wont hear ya......
    What happened there?
    Mr Browning likes this.
    Overkill is still dead.



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