Heat absorbing glass filters Schott® KG-1, KG-2, KG-3 and KG-5 or Hoya® HA-30, HA-50 are used to reduce the amount of heat transmitted through illumination optical systems.

KG glass filters absorbs the infrared radiation and then dissipates the heat into the air around the glass.

These absorption glass filters can be tempered to place the surface in tension and serves to increase the resistance to thermal shock and breakage where necessary.

Schott KG glasses can be utilised as a shortpass filter in order to pass the visible and block the IR.

Please see Custom or Stock page for capabilities and availability.