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Heat reflection filters with extended blocking range

Special Properties

  • Broadband blocking of infrared light
  • Good visible transmission
  • Operating temperature up to 250 °C
  • Dielectric multilayer coating

Typical Applications

  • Broadband heat protecting glass filter
  • Sensor- and measurement applications
  • Automotive applications
  • Medical lighting applications
  • Projector and lighting systems

Our SIR-IR heat reflection filters offer an extended blocking range up to 2.500 nm. The transmission of the filters in the visible range is not quite as high and neutral as for our high transmission SIR heat reflecting hot mirror, but this slightly lower visible transmission, facilitates the significant wider blocking capability for the infrared light irradiation. The SIR-IR heat reflection filter coating design represents the best possible compromise between the real world technical requirements and realizability.

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Transmission curve of the SIR-IR filter

Product Code

  • SIR-IR heat reflection filters


  • High temperature borosilicate glass
  • Other on request


Operating Temperature

  • up to 250 °C


  • Depending on substrate material and thickness
  • Other on request

Surface Quality

  • typ. 80-50 scratch & dig (MIL-0-13830A)
  • Other on request

Standard thicknesses

  • 2,00 mm

Other Specifications

  • Adherence according to MIL-C-675 C (tape test)
  • Abrasion resistant according to MIL-M-13508 C
All given details and specifications are mean reference values and are not guaranteed. In addition, please consider our "Notes on technical specifications"