① Colorless optical glass - It is almost completely transparent in a wide range of visible and near-infrared wavelengths and is the most widely used optical glass.
There are hundreds of brands according to the refractive index and dispersion and it is divided into two varieties, namely crown optical glass (represented by K) and flint optical glass (represented by F). Crown glass is borosilicate glass, which becomes flint glass after adding aluminum oxide. The main difference between the two is that the refractive index and dispersion of flint glass are both large, so spectral components are mostly made of it.
② Radiation-resistant optical glass - It has all the properties of colorless optical glass and can basically not change its performance under radioactive irradiation.
It is used for optical instruments irradiated by gamma, and its varieties and brands are the same as colorless optical glass. Its chemical composition is based on colorless optical glass,
and a small amount of cerium dioxide is added to eliminate the color center formed in the glass by high-energy radiation, so that the light absorption of this glass changes very little after irradiation.
③ Colored optical glass - It has specific absorption or transmission properties for certain wavelengths of light. Also known as filter glass, there are more than 100 varieties.
Color filters can selectively absorb certain colors, while neutral filters absorb all wavelengths of light equally, only reducing the intensity of the beam without changing its color.
Interference filters reflect unwanted colors instead of absorbing them based on the principle of light interference.
Send Email
售前客服
Skype