Schott RG filters, which appear black to the eye, serve for the separation of visible radiation and infrared radiation. While they almost totally absorb the visible radiation, the highest possible levels of the longer wavelength infrared radiation can pass through the filter.

   There are many sensor applications in the near infrared region, where undesirable visible radiation can distort measurements or even make them impossible and must therefore be totally eliminated.

   An additional area where the RG filter glasses are used is in infrared lighting technology. Lamps that are equipped with these filters only emit infrared radiation and appear black to the observer, even when operating, because the visible radiation is indeed absorbed.  Therefore these lamps are especially suitable for use in darkness and do not emit any disturbing radiation or make themselves visible.  These filters, combined with infrared sensitive cameras, allow surveillance systems (object protection) to operate unnoticed.

   The filter glass types are listed below.  To view the linear transmission curves and data sheet for each, simply point and click on the glass type of your choice.

For more information or prices on Schott color filters please contact us.

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