Colored Optical Filter Glass
Colored optical filter glasses have specific spectral transmittance characteristics within the range of the optical spectrum. They either uniformly or selectively attenuate optical radiation in specific spectral regions. The glasses can be classified into three categories based on their spectral transmission curves.
Cut-off Type Glass
The glass is named based on spectral characteristic of which is represented by the wavelength transmission limit. For example if the transmission limit of glass is 490nm, then it is named as JB490. There are five groups and 35 types of glasses.
Selective Absorption Glass
This kind of glass only transmits or absorbs light within the range of one (or several) wavelength(s). There are nine groups
Neutral Type Glass
It absorbs uniformly without selecting the light of different wavelength of visible spectrum.
Antiradiation Coverglass Used in Space
Antiradiation Coverglass is a kind of protective sheet used in space of visible spectrum.
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