Optical filters picture
Home / Products / Thin Film Coatings / SIR-IR Heat reflection filters

Heat Reflection Filters

Heat reflecting coatings with extended blocking range
SIR-IR Series

Special Properties

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

Typical Applications

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

Related filters and coatings

Our SIR-IR heat-reflection filters feature an extended blocking range up to 2.500 nm. The transmission of the filters in the visible spectrum is not quite as high and neutral as for our high-transmission SIR heat-reflecting hot mirror, but this slightly lower visible transmission makes a significant broader blocking capability for infrared light radiation possible. The SIR-IR heat-reflection filter optics design represents the best possible compromise between frequently requested filter characteristics and realizability. At sufficient order quantities, the cut-on wavelengths of the filters can be adapted to individual requirements.

To request an offer for our SIR-IR heat reflection filters with individual dimensions, please click the button below:


Request for Quotation



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 filter 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. Also, please consider our "Notes on technical specifications".

© 1994-2019 Präzisions Glas & Optik GmbH