properties - Hoya Vision

What Are The Material Properties Of The Lens

Index of refraction ranges from 1 for vacuum, to about 1.8 for some common used optical glass. The index of refraction for any glass material varies slightly at different wavelength of light, leading to unequal propagation for each individual wavelength, causing chromatic aberration. So when reviewing design specifications, you should know and determine appropriate test…

Trivex Material Properties

Rub the toothpaste on the scratched surface in Bausch and Lomb presented the initial factory-produced ophthalmic glass in the U.S. in 1916. CR-39, the “space age polymer”, was first used in ophthalmic lenses in 1962 In the early 1980s, polycarbonate was introduced by Gentex Corporation. High Index 1.60 was introduced in 1987, 1.66 in 1992…