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Technology

300 years of technological standstill are enough!

Over the past 300 years, eyewear has been dramatically transformed from a heavy, unshapely vision aid to a lightweight fashion accessory. Technologically, though, very little progress was made during this period. Rimless eyewear is still drilled, just as it always has been. This technique creates problems such as lens breakage and stresses in the lens, which even the most modern processing technologies have still not eliminated.

The innovative LENSBOND system is the first assembly technology that dispenses completely with drilling and opens up new possibilities based on nano bonding.

Stressed eyewear

  • The drilling of lenses causes extreme short-term stress peaks as a result of pressure, friction, heat and vibrations. These stresses, in turn, can result in lens breakage and production losses.
  • Mechanical loads exerted during drilling cause stresses and micro-cracks, which can suddenly erupt in the form of cracks or even lens breakage on exposure to shocks (e.g. falling on a hard floor).
  • Drilled eyewear is often subject to constant stress. A tight fit between frames and lens often occurs due to the close tolerances required in production. Rimmed frames subject the lenses to circular pressure.



Safety

A safe bond

Adhesive joining methods offer a number of advantages over mechanical processes for the connection of eyewear components.
  • Adhesives spread loads and stresses over the entire bonding surface, distributing static and dynamic loads more uniformly instead of concentrating them on highly stressed points.

  • Adhesive bonds are more resistant to stresses caused by bending and shock.

  • Uniform distribution of stress: Peak stresses from drilling are eliminated.

  • No warpage within the lens: In rimmed eyewear, the pressure of the frame on the lenses can cause optical distortions.

  • No lens damage: The risk of breakage due to micro-cracks is eliminated.

  • No restrictions: All common types of lenses (CR 39, PC, TRIVEX, HI-INDEX) can be used, even those with coatings. Ultra-thin lenses can also be produced without risk.

  • Clean solution: Projecting parts no long hinder the cleaning of lenses.

  • Greater safety: The risk of breakage is greatly reduced.

  • Improved product appearance: Bonded connections lend a more complete appearance to the product. The connection points are no longer visible after bonding.

  • Innovative technology: Bonded connections are increasingly replacing conventional connection approaches in all applications. Bonding technology has seen significant advances in recent years.