IR Blocking Filter

  • High-Performance IR Filter
  • Average Optical Density > 6 in Rejection Region
  • Average Transmission > 90% in Transmission Region
  • Immersed Dielectric Coating on Borofloat® Substrate


IR Blocking Filter

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Item # TF1
Transmission Region Tavg > 90% from 375 to 650 nm
Rejection Region ODavg > 6 from 700 to 1400 nm
Graphs (Click for Details) info
Coating Immersed Dielectric
Surface Quality 80-50 Scratch-Dig
Substrate Material Borofloat®
Diameter 30.0 mm (1.18")
Diameter Tolerance ±0.1 mm
Clear Aperture Ø27 mm
Thickness 3.3 mm (0.13")


  • 30.0 mm Outer Diameter
  • Excellent Suppression in Rejection Region (ODavg > 6)
  • Recommended Transmission Direction Indicated by Caret on Edge

Thorlabs' IR Blocking Filter is a high-performance filter that is useful for blocking NIR wavelengths. This filter transmits light from 375 - 650 nm and blocks light from 700 - 1400 nm. It offers an average optical density (OD) of 6 in the rejection region and an average of greater than 90% transmission in the transmission region. The filter features a durable immersed dielectric coating on a Borofloat® substrate and can be mounted in one of our internally threaded SM30 lens tubes or optic mounts.

The TF1 filter is identical to the one included in the LAURE1 Cerna trinoculars and can be installed before the eyepieces in the LAURE2 trinoculars using an SM30RR retaining ring.

Note: Borofloat® is a registered trademark by a company of the Schott group.

Posted Comments:
user  (posted 2023-10-13 09:11:42.597)
Is there any damage threshold data for this filter, please? Thanks!
jpolaris  (posted 2023-10-20 01:45:42.0)
Thank you for contacting Thorlabs. At this moment we do not have extensive CW and pulsed LIDT data for TF1. However, TF1 has been measured to have an LIDT > 10 J/cm^2 for nanosecond pulses in the visible to NIR.
羿轩 李  (posted 2023-03-09 18:55:09.107)
Hello, can you provide the film data of this IR-cut filter?
jgreschler  (posted 2023-03-09 04:10:32.0)
Thank you for reaching out to Thorlabs. Additional specs and test data can be requested by contacting I have reached out to you directly to discuss this request.
user  (posted 2022-01-17 05:37:16.13)
Hi, is there any filter that passes from 200nm to 700nm(blocking IR and passing UV+VL)?
YLohia  (posted 2022-01-19 08:37:10.0)
Hello, thank you for contacting Thorlabs. Unfortunately, we do not offer such a filter at the moment.
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IR Blocking Filter

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
TF1 Support Documentation
TF1Ø30 mm IR Blocking Filter, Transmission: 375 - 650 nm, Rejection: 700 - 1400 nm