According to custom design to manufacture kinds of spherical lenses. Such as plano convex spherical lens, plano concave spherical lens, biconvex spherical lens), biconcave spherical lens, meniscus lens, achromatic lens, aspherical & spherical series.Material: flint glasses, UV-fused silica, Infrared fused silica, CaF2, Ge, ZnSe, Si, etc. Focal length: +/-5mm --+/-1000mm+/-1% (test by TIROPTICS OPTOMATIC2000 made in Germany)Diameter: 4mm--200mm +/-0.1mmTc tolerance:+/-0.1mmCentration: 3-5' Surface accuracy: lambda/2Surface quality: 40/20Clear aperture: 90%Coating: custom designBesides, there are a large volume of stock optical components in various shapes and sizes to facilitate quick deliveries.