Oem Large Small Optical Bk7 Spherical Reflective Mirror Lens

Mostly optical glasses can effectively transmit visible and near-infrared light. However, in the near ultraviolet region, most glass absorbs light to some extent. If the optical system must transmit ultraviolet light, the most common materials are fused silica and fused silica. One of the characteristics of quartz glass is that it has high light transmittance for ultraviolet, visible, and infrared rays. The UV transmittance is the highest, especially for shortwave UV; The wavelength of 180nm has a transmittance of up to 80%, and the wavelength of 190nm has a transmittance of up to 90%, making it an ideal ultraviolet material.