AgniRoth provides a broad range of custom spherical lenses – convex, concave, aspherics and meniscus lenses, made of different varieties of optical glass. These single lenses, or singlets as they are called, have two optical surfaces. They can be plane, concave or convex surfaces based on the need to create real or virtual images. Lenses reflect some portion of the light incident on them and may be coated on one or both sides to minimize this phenomenon.