The filter glass selectively transmits light, transmitting it over a specific range of wavelengths and blocking out the rest of the light.
The advantages of using filter glass for optical components are:
- Many options of filter glass
- Precisely controlled glass composition and melting process
- Excellent homogeneity, without bubbles or inclusions
- Filter glass can be cheaper than thin film filters
- Filter glass can be more durable than thin film filter
- Filter glass can be used as substrate for thin film filters
Filter glass is used in many fields including astronomy, digital imaging (CDD), displays (CRT, LCD, FED), fiber optics, high power laser attenuators, lighting, artificial vision, medical devices, night vision, optomechanical devices, photography, protective glasses, spectroscopy and telecommunications.
They can be extremely beautiful, which is why they are also used in art glassware.
