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  1. Thread: Tinting process

    by essegn
    Replies
    1
    Views
    2,449

    Tinting process

    Hi there,

    we would like to change our varnish’s producer for an other one and it seems that we need to improve our tinting process, because there is a color shift after curing in an oven cause by...
  2. Replies
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    3,072

    Mystery solved. The screen of the phone i meant,...

    Mystery solved. The screen of the phone i meant, was not made of plastic, but it is actually Gorilla Glas 3. However it looks like a plastic at all :)
    Now it makes sense why the scratch resistance...
  3. Replies
    3
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    3,072

    material of smartphone screens

    Yesterday i was wondering, from which materials are smartphone screens made of. I mean plastic materials used by cheaper mobiles.

    I was able to find the only information regarding to glass...
  4. Thread: Rx from Poland

    by essegn
    Replies
    9
    Views
    4,153

    Haliop, you have translated it right 👍

    Haliop, you have translated it right 👍
  5. Thread: coating lenses

    by essegn
    Replies
    5
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    7,754

    To achieve the best possible bayer test is quite...

    To achieve the best possible bayer test is quite tricky. Please keep in mind that a Bayer test results consists of combination of HC + AR. So it means when you have pure performance of hard coating...
  6. Thread: Lab software

    by essegn
    Replies
    14
    Views
    9,248

    Just to add one main player here in Europe -...

    Just to add one main player here in Europe - Lensware. Not cheap, great service, maintenance fees, in Europe the most spreaded one.
  7. Replies
    7
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    6,841

    Transitions lenses 1.498 question

    I am aware that this kind of question should be addressed to the manufacturer, but does anybody know why the Transitions 1.5 lenses are not being made from CR39 material, but from some material with...
  8. Replies
    8
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    12,935

    http://www.optiboard.com/forums/showthread.php/488...

    http://www.optiboard.com/forums/showthread.php/48850-Theres-an-easier-way-I-just-know-it?
  9. Replies
    6
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    11,781

    To the second point: obviously i have described...

    To the second point: obviously i have described it wrong. I mean the test when by Natural Diamond Turning Tool is being cut the lens (plano) and then after the surface is done the chuck axis move to...
  10. Replies
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    11,962

    Yea, i forgot to mention that my question had...

    Yea, i forgot to mention that my question had been related to the plastic lenses.
    Do you use any cooling time for glass lenses after blocking ? I am aware that it could vary from alloy to alloy (or...
  11. Replies
    6
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    11,781

    Thank you for the exhausting reply. But anyway i...

    Thank you for the exhausting reply. But anyway i do not understand what do you mean by "metal machining for precision metal finishing versus glass/plastic machining for spectacle lenses". So what i...
  12. Replies
    9
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    11,962

    cooling after blocking

    By express jobs is often used the cooling of the lens on an external cooling plate because of saving time.
    Could be the "faster cooling method" used for all material indices (1.498 , 1.60 etc ..) or...
  13. Replies
    5
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    8,826

    size of a blocking ring

    How blocking rings are being picked up ? - i mean for lenses in general, not special lenses and sunglasses.
    I was taught to use as big as possible (because of better support from bottom to avoid...
  14. Replies
    6
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    11,781

    Evaluating Calibration Tolerances

    By calibraton of Natural Diamond Turning Tool on modern generators there are used for calibration in general two steps:
    - height calibration (result should be one straight line)
    - -6,00 curve
    ...
  15. Replies
    3
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    7,909

    Vision Ease. As i know they were also the sponsor...

    Vision Ease. As i know they were also the sponsor of this site for a long time.
  16. Replies
    3
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    4,433

    Hi Mauro, It is nice to hear from you. I wrote...

    Hi Mauro,

    It is nice to hear from you. I wrote it wrong - i was told that there exists 1.6 varnish and there is a primer already included. Anyway, i believe that answer remains the same.. Thank you
  17. Replies
    2
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    4,677

    I would say there is no difference among 1.5...

    I would say there is no difference among 1.5 Transitions lenses ( doesn't matter which generation) and clear 1.5 lenses. I have also experience to dip them in 1.6 lacquer with the same settings as...
  18. Replies
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    3,654

    overheated alloy

    What wil happen with the alloy which was overheated by 90-100 Celzius degress ?
    I would say that it will decrease its lifetime, but about the performance i am not sure.
    I would like to hear some...
  19. Replies
    3
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    4,433

    1,6 varnish + primer in one

    Have you ever heard about the combination of 1,6 varnish and primer into the one mixture ?
    Does anybody experience that it Works for polycarbonate and high indices (MR10 or MR174)?
  20. Replies
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    25,322

    I think for you is the best to send some...

    I think for you is the best to send some defective lenses directly to the dip coating machine manufacturer for an analysis. It will give you another ideas what to check.

    All what is written above...
  21. Replies
    12
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    9,825

    Rafael, it is nice to see that among a lot of...

    Rafael, it is nice to see that among a lot of trash is one great reply!
  22. Replies
    12
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    9,825

    I am surprised that i have got no answer. So...

    I am surprised that i have got no answer.

    So far i have heard a lot of stories, that the best AR coating experienced stuff are not measuring the curves (for color). They just look at the the color...
  23. Thread: CO2 vs Excimer

    by essegn
    Replies
    0
    Views
    3,722

    CO2 vs Excimer

    I would like to know to hear some info about differences between CO2 and Excimers laser - not the technology itself, but i would like to focus on performance.

    "In my carrier" i have used two CO2...
  24. Replies
    36
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    12,016

    Measure the PD from outside (from inside it is...

    Measure the PD from outside (from inside it is also possible, but it is much complicated). Mark an optical centers in the focimeter, put the frame on the ruller (that lies on the table) and by...
  25. Replies
    4
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    5,821

    for the coater Ultra Optics Mini II you have...

    for the coater Ultra Optics Mini II

    you have place for sure:
    ...
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