ZEISS DuraVision Platinum

DuraVision® Platinum by ZEISS

The best of ZEISS Premium coatings

To meet the challenges of everyday life, we need hard, dirt-resistant lenses that are easy to clean. This is precisely what hard, anti-reflective lens coatings offer – but the quality of these coatings can vary greatly.

What makes ZEISS lenses with DuraVision® Platinum AR coating different? These hard and light lenses are very robust, dirt-resistant and easy to clean while offering first-rate anti-reflective properties. An integrated system of coating layers densely packed using ion-assisted deposition results in a lens surface that is three times harder than the previous generation of hard anti-reflective (AR) coated plastic ZEISS lenses and 35 % harder than AR coated glass ZEISS lenses*. ZEISS lenses with DuraVision® Platinum AR coating also have a more cosmetically attractive, blue residual reflection colour that generates over 20% less luminous reflectance than conventional green AR coated ZEISS lenses.

  • Benefits
    More robust

    Without DuraVision® Platinum** (2. picture, left) and with DuraVision® Platinum (2. picture, right).

    1. More robust

    ZEISS lenses with DuraVision® Platinum AR coating are three times harder than the previous generation of hard anti-reflective (AR) coated plastic ZEISS lenses1 and 35 % harder than AR coated glass ZEISS lenses.2

    Dirt-resistant

    Without DuraVision® Platinum** (2. picture, left) and with DuraVision® Platinum (2. picture, right).

    2. Dirt-resistant

    The patented anti-static layer3 prevents the build-up of static electricity. As dust and lint are not attracted to the lens surface, lenses stay cleaner longer.

    Easy to clean

    Without DuraVision® Platinum** (2. picture, left) and with DuraVision® Platinum (2. picture, right).

    3. Very easy to clean

    The super-slick Clean Coat makes lenses very easy to clean. Lenses with high contact angles repel oil and water more effectively. ZEISS lenses with DuraVision® Platinum AR coating have a contact angle of a minimum of 110° (lenses without super-slick clean coat: 95°).

    Anti-reflective properties

    Without DuraVision® Platinum** (2. picture, left) and with DuraVision® Platinum (2. picture, right).

    4. Anti-reflective properties

    A less noticeable and blue reflection colour increases the light transmitted by the lens, resulting in even better vision. These lenses show more than 20% less luminous reflectance than conventional green AR coated ZEISS lenses.

    **Compared with conventional lenses

  • Details

    Discover the technology behind the hardest ever ZEISS lenses with DuraVision® Platinum AR coating

    Coating layers

    Coating layers

    Made up of nine ultra-thin layers, an integrated system of coating layers densely packed using ion-assisted deposition results in a lens surface that is three times harder than the previous generation of hard (AR) coated plastic ZEISS lenses1 and 35 % harder than AR coated glass ZEISS lenses.2

    Technologies

    Conventional technology vs. DuraVision® Platinum

    The secret of hard lenses: ion bombardment

    Ions transfer their kinetic energy to the coating molecules when these strike the lens surface.
    The result: the coating's layers are more densely packed.

    Why compromise on hardness, dirt-resistance and easy cleaning when you can have new ZEISS lenses with DuraVision® Platinum AR coating?


  • Test series

    The hardest lenses ZEISS ever made.

    Three questions - three answers:

     

    1. What exactly is a “hard” lens?
      Lenses need to be robust enough to resist damage in daily life. The harder the lens surface, the more robust the lenses are.

    2. How is lens hardness defined?
      To find the best ways to make the hardest ever ZEISS AR coating for DuraVision® Platinum, we looked at:
      - Other high-tech industries
      - The everyday life of a spectacle wearer

    3. How does DuraVision® Platinum perform in terms of hardness?
      DuraVision® Platinum outperforms previous generations of ZEISS AR coatings in:
      - High-tech hardness testing
      - Real-life simulation tests
      - The Bayer ratio

    Hardness tests: using DIN ISO 14577

    Following the measurement setup as described in DIN ISO 14577 we used an indentation instrument to determine two critical properties of DuraVision® Platinum:

    We measured the hardness in a depth range of around 200 nanometers, the most critical range for visible scratches:

    To create scratches that extend to more than the critical 200 nm below the coating surface, much higher forces need to be applied for DuraVision Platinum than for conventional greenish ZEISS AR coatings.

    At the same time, we also measured the force needed to completely break the coating:

    The force needed to generate coating breakage is increased from 211 µN (conventional ZEISS coatings) to 316 µN.
    High-tech equipment in the development of DuraVision<sup>&reg</sup> Platinum

    High-tech equipment in the development of DuraVision® Platinum

    The technology: a high-resolution nano-indenter

    What we improved: surface hardness and crack-resistance of the coating

     

    What’s new:
    Similar technology has been used internationally in many different industries in which the hardness of material surfaces plays an important role, e.g. in the development and production of modern precision tools. But so far, it has not been applicable to lenses.

    At the forefront of research:
    Indentation equipment precise enough for the extremely thin coating layers on spectacle lenses has just recently been developed and was immediately integrated into the ZEISS research lab to help create the hardest ever ZEISS AR coating – DuraVision® Platinum.

    SDWT (Standardized Dirt Wiping Test): The test that reflects real life.

    SDWT (Standardized Dirt Wiping Test): The test that reflects real life.

    600 wipes with 4kg pressure: DuraVision® Platinum still looks like new.

    In daily life, most scratches occur when lenses are cleaned with a cloth that has dirt on it, either from abrasive dirt particles that are on the lens when the wiping starts or from dirt particles that are already in the cloth. In the SDWT we use an artificially soiled cloth to simulate damage caused by lens cleaning:

    • Cleaning procedure using standardized dust to soil cleaning cloth
    • Improvement in scratch resistance from previous generations of ZEISS AR coating to DuraVision® Platinum after 600 wipes with 4 kg pressure.

    Previous generation of ZEISS AR coating: Bayer ratio < 3 The AR peels off the surface, producing a large amount  of scattered light

    Previous generation of ZEISS AR coating: Bayer ratio < 3 The AR peels off the surface, producing a large amount of scattered light

    DuraVision® Platinum by ZEISS: Bayer ratio > 10 generates only fine lines in the coating. There is no peeling of the coating and  less scattered light

    DuraVision® Platinum by ZEISS: Bayer ratio > 10 generates only fine lines in the coating. There is no peeling of the coating and less scattered light

    Bayer ratio (COLTS procedure)

    • The Bayer ratio is a measure of the abrasion resistance of a (coated) surface to an oscillating abrasive medium (defined sand or similar).
    • The surface damage is assessed via the increase in scattered light resulting from the surface damage.
    • Different procedures for such a test are in place.
    • We follow the procedure set forth by the COLTS laboratory in the U.S.
    • (COLTS is the supplier-independent ophthalmic lens testing facility in the U.S.).

    3 times harder than previous generation of ZEISS lenses with AR coatings and 35% harder than ZEISS glass lenses

    The use of an electron microscope with 3000x magnification makes the advantages of DuraVision® Platinum clearly visible. While the previous generation of ZEISS coatings tears and peels, DuraVision® Platinum only shows fine lines. Less scattered light is generated and a higher Bayer ratio is achieved.

1 ZEISS lenses with DuraVision® Platinum AR coating in 1.67 compared to LotuTec® in 1.67; In the U.S. compared to Carat Advantage®.
2
ZEISS lenses with DuraVision® Platinum AR coating in 1.5 compared to ZEISS SV sph glass 1.5 with Super ET®*.
3 U.S. patent no. 6,852,406.

* Measured with the Bayer test and conducted using COLTS standard operating procedure and abrasive recommended by COLTS.

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