During everyday activities, we are exposed to light from many different sources: the sun, tablets, digital notebooks, cell phone and TV screens, lamps, etc. Light radiation from all of these sources is not always beneficial. In particular, blueviolet light (400 - 450 nm) and ultraviolet light can become dangerous over an extended period and the natural defenses that our eyes possess (eyelid-closing reflex, pupil diameter control, adaptation of retina to light intensity) are not always effective [...].
To help prevent these problems, it is important to wear glasses that reduce the amount of harmful light radiation reaching the eyes, minimizing negative health effects.
The coating strategies described in this article are commonly used to increase protection from harmful blue-violet light and UV light. Table 1 (download full article) summarizes these products indicating the lens types that they are usually applied to and the benefits that they provide.
Complete protection AR and Mirror + UV protective AR coatings are high end, top level protection coatings that are commonly used for clear/photochromic lenses and tinted sunglasses.
An article by:
Gero Antonio Bongiorno
Head of R&D Coating Technology, Satisloh Italy
During everyday activities, we are exposed to light from many different sources: the sun, tablets, digital
notebooks, cell phone and TV screens, lamps, etc. Light radiation from all of these sources is not always beneficial.
Clear vision is crucial for various daily tasks, making glasses essential for billions of people worldwide. To obtain the right pair, individuals consult an optician who then typically orders lenses from an ophthalmic manufacturing lab.
When concerned with effective lens production, it’s imperative for labs to consider not only the most efficient, productive and cost-effective methods, but also those which will not cause negative environmental repercussions.
This article presents a comprehensive evaluation of actual available technologies & thier challenges for the production of freeform optics. Freeform optics refers to the fabrication of optical elements with non-traditional shapes, allowing for enhanced optical performance and versatility in various applications.