According to custom design to manufacture kinds of spherical lenses. Such as plano convex spherical lens, plano concave spherical lens, bi-convex spherical lens, bi-concave 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 + / -0.1mm Tc tolerance: + / -0.1mm Centration: 3-5' Surface accuracy: lambda/ 2 Surface quality: 40/ 20 Clear aperture: 90% Coating: custom design Besides, there are a large volume of stock optical components in various shapes and sizes to facilitate quick deliveries.