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Thread: Transitions Xtractive Polarised

  1. #26
    OptiBoard Professional KrystleClear's Avatar
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    Quote Originally Posted by lenslover View Post
    Is there still the old Vantage lens, or does the Xtractive Polarized take its place? The Vantage polarization was not very noticeable. Is this one better?
    I was told by my lab that it is replacing it, but for the moment, the Vantage is still available. Not sure for how much longer. That *could* just be how my lab is handling it though.
    Krystle

  2. #27
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    I'm pretty sure at this point that it's just the same product rebranded. BUT I think they might have made new blanks, rather than using the really old ones which they were using for Vantage.

  3. #28
    Ghost in the OptiMachine Quince's Avatar
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    I was told the change in formula has something to do with the polarizing molecules being shrunk- though I can't remember why that was supposed to matter...

    anyways- here's a thread y'all might be interested in revisiting that was quite helpful for me in distinguishing the differences between variable polarized lenses:

    https://www.optiboard.com/forums/sho...+infinite+grey
    Have I told you today how much I hate poly?

  4. #29
    Compulsive Truthteller OptiBoard Gold Supporter Uncle Fester's Avatar
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    Quote Originally Posted by Quince View Post
    I was told the change in formula has something to do with the polarizing molecules being shrunk- though I can't remember why that was supposed to matter...

    anyways- here's a thread y'all might be interested in revisiting that was quite helpful for me in distinguishing the differences between variable polarized lenses:

    https://www.optiboard.com/forums/sho...+infinite+grey
    From a google search:

    H.I. Bjelkhagen, in Encyclopedia of Modern Optics, 2005
    Silver Halide Materials

    A silver halide recording photographic material is based on one type, or a combination of silver halide crystals embedded in a gelatin layer. The emulsion is coated on a flexible or stable substrate material. Silver-halide grain sizes vary from about 10 nanometers for the ultra-fine-grain holographic emulsions to a few micrometers for highly sensitive photographic emulsions (Table 1).

    https://www.sciencedirect.com/topics...silver-halides

  5. #30
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    Quote Originally Posted by Quince View Post
    I was told the change in formula has something to do with the polarizing molecules being shrunk- though I can't remember why that was supposed to matter...

    anyways- here's a thread y'all might be interested in revisiting that was quite helpful for me in distinguishing the differences between variable polarized lenses:

    https://www.optiboard.com/forums/sho...+infinite+grey
    I believe Infinite Gray is an entirely different technology, since it is fully polarised all the time? Although the literature doesn't really give any specifics other than "blocks blinding glare in all light conditions"

  6. #31
    sub specie aeternitatis Pete Hanlin's Avatar
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    [Disclaimer- Essilor Employee] I've seen some samples of the Transitions XTRActive Polarized, and they are impressive (IMO). The lenses get very dark outdoors (I am somewhat light sensitive and I like my sunglasses dark- I could be quite happy wearing this product outdoors).

    Transitions XTRActive Polarized will replace Transitions Vantage. The new chromophores improve on the fadeback speed, and are "clearer" indoors. Yes, the lens will have a bit of tint indoors (which I actually find quite nice- because our office building is way over-lighted to begin with). The new configuration also gets darker outside and maintains more of a tint behind a windshield. This is partially due to the fact that the new chromophores used in Transitions XTRActive Polarized lenses react to a broader spectrum of light (including some visible light- which is why they activate behind the windshield). So, they get darker- both outside and in your car, they fade back quicker, and the color is truer. There will still be just a bit of tint indoors, but when you go outside... they are dark. As a light-sensitive person who likes polarization when I'm wearing dark lenses, I give this one two thumbs-up!

    The degree of polarization will depend on how dark the chromophores are (this is true for any polarized lens). My very first post on Optiboard (good lord, that had to be 20+ years ago now) pertained to the possibility of clear polarizers. Darryl Meister walked me through an explanation that went something like this... "Think of polarization as a window blind. If the blind was made of a clear material, even when it was closed it wouldn't have any effect on the amount of light coming through the window. As you tint the blind darker and darker, it has more of a filtering effect. The polarization filter in a lens blocks light traveling at a specific axis- but if the polarizing filter is clear, you will not notice any polarizing effect (because the light is still coming through the lens- even along the polarizing filter's axis). As the polarizing filter becomes darker, it filters more and more light perpendicular to its axis of polarization."
    (Sorry that is my annotated version of a 20+ year old conversation... I'm sure Darryl put it much more precisely :^)

    It IS possible to polarize light without tint- but the process involves a whole lot of parallel mirrors (not particularly suitable for ophthalmic applications).

    Therefore, the amount of polarization will depend on how dark the chromophores are. In the car, if you have 50% filtering, you'll get 50% effect on the polarization. This is a product you should order and try for yourself- I think you'll be impressed.
    Pete Hanlin, ABOM
    Vice President Professional Services
    Essilor of America

    http://linkedin.com/in/pete-hanlin-72a3a74

  7. #32
    Master OptiBoarder AngeHamm's Avatar
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    Quote Originally Posted by Pete Hanlin View Post
    [Disclaimer- Essilor Employee] I've seen some samples of the Transitions XTRActive Polarized, and they are impressive (IMO). The lenses get very dark outdoors (I am somewhat light sensitive and I like my sunglasses dark- I could be quite happy wearing this product outdoors).

    Transitions XTRActive Polarized will replace Transitions Vantage. The new chromophores improve on the fadeback speed, and are "clearer" indoors. Yes, the lens will have a bit of tint indoors (which I actually find quite nice- because our office building is way over-lighted to begin with). The new configuration also gets darker outside and maintains more of a tint behind a windshield. This is partially due to the fact that the new chromophores used in Transitions XTRActive Polarized lenses react to a broader spectrum of light (including some visible light- which is why they activate behind the windshield). So, they get darker- both outside and in your car, they fade back quicker, and the color is truer. There will still be just a bit of tint indoors, but when you go outside... they are dark. As a light-sensitive person who likes polarization when I'm wearing dark lenses, I give this one two thumbs-up!

    The degree of polarization will depend on how dark the chromophores are (this is true for any polarized lens). My very first post on Optiboard (good lord, that had to be 20+ years ago now) pertained to the possibility of clear polarizers. Darryl Meister walked me through an explanation that went something like this... "Think of polarization as a window blind. If the blind was made of a clear material, even when it was closed it wouldn't have any effect on the amount of light coming through the window. As you tint the blind darker and darker, it has more of a filtering effect. The polarization filter in a lens blocks light traveling at a specific axis- but if the polarizing filter is clear, you will not notice any polarizing effect (because the light is still coming through the lens- even along the polarizing filter's axis). As the polarizing filter becomes darker, it filters more and more light perpendicular to its axis of polarization."
    (Sorry that is my annotated version of a 20+ year old conversation... I'm sure Darryl put it much more precisely :^)

    It IS possible to polarize light without tint- but the process involves a whole lot of parallel mirrors (not particularly suitable for ophthalmic applications).

    Therefore, the amount of polarization will depend on how dark the chromophores are. In the car, if you have 50% filtering, you'll get 50% effect on the polarization. This is a product you should order and try for yourself- I think you'll be impressed.
    Pete, do you know if it's going to be available in 1.67? Vantage was supposed to be released in 1.67, then the release was delayed, then it was canceled. I'd dearly love to try this lens, but with my high minus RX I haven't been able to wear poly for decades.
    I'm Andrew Hamm and I approve this message.

  8. #33
    sub specie aeternitatis Pete Hanlin's Avatar
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    [Disclaimer- Essilor employee]
    Hi Andrew,

    Transitions XTRActive Polarized will be available in a 1.67 blank- at the very least in SFSV format (so you'll be able to make a SV or FBS formatted lens from the blank). We anticipate significant demand for the product, so Essilor is building inventory in preparation for our launch (if I were to make an unofficial guess, I would put money on sometime in Q4 of this year).

    Best regards,
    Pete
    Pete Hanlin, ABOM
    Vice President Professional Services
    Essilor of America

    http://linkedin.com/in/pete-hanlin-72a3a74

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