For optical lens factories coating is one of the key elements of a lens. Lenses with different coatings differ not only in appearance but also in function. Generally, lens coatings can be divided into four main categories: UC, HC, HMC, and SHMC. The diagram below clearly illustrates the relationship between them. 1. UC（Uncoated） UC lens typically … Continue reading Do you know what types of coatings are available on optical lenses?