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Thread: possible to un-polish lens edges?

  1. #26
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    Un-polished

    Quote Originally Posted by jsutcurious

    Have you ever heard of anyone wanting lenses un-polished?
    Yes, some of the patients didn't want their lenses to be polished, since they were also facing the same problem - Glare!

    -----------------------------------
    Samuel

  2. #27
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    Remember we are talking about the edges not the front and back surfaces, I have had quite a few (before I stopped polishing all edge surfaces as freebie extra service) complain about the glare from same and ask that I remove the polished surface.

    Chip

    Just another good intention gone wrong.
    Last edited by chip anderson; 04-08-2006 at 08:42 PM. Reason: mo

  3. #28
    Master OptiBoarder spartus's Avatar
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    Quote Originally Posted by chip anderson
    AW: GM until the '60's always hired people who had worked thier way up the line. It always made a profit. Then they started hireing college "educated" managers. The first year they had a CEO with a college education, the lost money. They have continued with such CEO's and continued to loose money.

    Chip
    Correlation is not causality. Can't say it enough.

  4. #29
    Manuf. Lens Surface Treatments
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    Big Smile you can still polish and un-polish the same way as in the old days.

    This discussion about polished or nor polished lenses existed already in the 1950s and 60s with the only difference that during those days the lenses were made from glass.

    If we sold a pair of lenses with polished lenses and the customer came back sating that the glare bothered him. We passed the lenses over the ceramic stone, 30 seconds per lens.........................or if he had non-polished edges and wanted them polished,................we buffed them on a felt wheel which took maybe 2 minutes per lens.

    Today we use plastic lenses which are even easier to handle...........you can still polish and un-polish the same way as in the old days. On polycarb you can even polish edges by jusr wiping a chemicals over the edge.

  5. #30
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    Quote Originally Posted by optixbil
    I'm sorry to disagree, but having owned a wholesale lab for over 32 years, we have always sent edged lenses out for A/R, many times after the patient decided to have it done after wearing the glasses. We have used many different coating facilities.
    Do they hard coat them?

    The lab we use for coatings will AR coat a lens but will only hard coat it first if it is a full blank. I only like to sell hard/AR coats.

  6. #31
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    Blue Jumper I only like to sell hard/AR coats.........................

    Quote Originally Posted by rsandr
    I only like to sell hard/AR coats.
    AR coatings are made with SIO2 which becomes as hard a surface as you can get when it is applied as an AR soating


    Silicon dioxide General Other names Silica
    see text Molecular formula

    SiO2

    Molar mass 60.1 g/mol

    Appearance white or colourless, solid (when pure)

    CAS number [14808-60-7]

    Properties

    Density and phase 2.6 g/cm3, solid

    Solubility in water insoluble

    Melting point 1610 °C

    Boiling point 2230 °C

  7. #32
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    Have they been kidding us?

    Quote Originally Posted by Chris Ryser
    AR coatings are made with SIO2 which becomes as hard a surface as you can get when it is applied as an AR soating
    I dont doubt you for a minute but a few coating labs I know have sold AR and hard AR as separate products.
    Are they taking the pish?

  8. #33
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    Redhot Jumper I would say that they are taking the pish........................

    Quote Originally Posted by rsandr
    Are they taking the pish?
    After having looked up the word "pish" in the dictionary.................I am still learning...........I would say that they are taking the pish.

    There is no soft or hard SIO2 once it has been vacuum coated on a sustrate as far as I know.

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