The double concave lens of Ecoptik has a negative focal length, thereby causing collimated incident light to diverge. A double concave lens has an equal radius of curvature on both sides of the lens.

Double concave lensexamples

AR coatings can also help prevent eye fatigue and digital eye strain. Your eyes don’t have to work as hard to capture a quality image since they get more light.

AR lenses have  a specialized coating that is made of a microscopic layer of metal oxides that neutralize reflections, allowing it to minimize glare from the front and back surfaces of each lens. They aid in the transmission of light through the optical lens and into your eye.

Planoconcave lens

Anti-reflective coatings allow 99.5 percent of light to flow through the lens, compared to 92 percent for regular lenses.

Double concave lensray diagram

When you have AR coatings on your lenses, driving at night becomes a lot easier. The halo effect around car lights is reduced considerably.

For optimal clarity throughout the day, anti-reflective coatings can be applied to regular optical lenses as well as sunglasses.

Double concave lensuses

Anti-reflective (AR) eyeglass lenses reduce glare and reflections that are distracting and affect how well you see. That’s why anti-reflective coatings are one of the most popular lens choices among people who wear glasses.

Without an AR coating, lenses have noticeable glare, which means light reflects off their surfaces, limiting the quantity of light traveling through the lens. This can make your vision less clear and lower your ability to detect contrasts, especially at night.

A double concave lens/mirror has a negative focal length, thereby causing collimated incident light to diverge. The double concave lens/mirror has an equal radius of curvature on both sides of the lens. They are generally used to expand light or increase focal length in the existing system, such as beam expander and projection systems.

Another advantage of AR coatings is that they make your glasses and eyes look better by nearly eliminating distracting reflections and glare that would otherwise bounce off your glasses.