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Knight Optical(UK) Ltd - [email protected] - +44 (0)1622 859444

Precision IR-Cut Filters

What are you looking for in Stock?

Precision IR-cut filters offer superior transmission and scratch/dig to our standard range and are ideal in demanding camera applications such as ANPR. IR-cut filters are designed to cleanly cut out unwanted IR and UV light that would otherwise compromise the colour integrity of the image. By fitting an IR-cut filter, true to life colour can be restored.

Our IR-cut filters are hot mirror coated on a quality borosilicate or equivalent glass substrate and offer sharp transitions between the transmitting and reflecting bands to improve accuracy and control over the system. The substrate is chemically resistant to acidic and saline solutions and will not degrade under normal conditions. A low thermal expansion means the optic can survive rapid changes in temperature while maintaining its structural integrity where other materials might crack or shatter. Precision range filters are AR coated on the rear to reduce unwanted reflections and improve transmission.


Material: Borosilicate or equivalent
Diameter: +0.0 / -0.20 mm
Length / width: ± 0.30 mm
Thickness: ± 0.20 mm
Surface quality: <60:40 scratch/dig
Transmission: Tavg>94% 420-620nm
Blocking: Tmax<2% 700-1000nm
Wavelength accuracy: +/-10nm
Front surface Hot mirror coated
Rear Surface AR coated


  • Available stock sizes: Square 5mm-100mm, Diameter 5mm-100mm
  • Cutting down or edged to special shapes and sizes at short notice
  • Mounting of diameters and squares
  • Improved scratch/dig specifications are available for high resolution applications

Stock Optics

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Part No. Wavelength cut-on (nm)Wavelength cut-off (nm)Transmission (%)Diameter
MaterialType Price
400FIP0005 400650>94%51.1BorosilicatePrecision £19.95
400FIP0010 400650>94%101.1BorosilicatePrecision £15.45
400FIP0013 400650>94%12.51.1BorosilicatePrecision £16.95
400FIP0015 400650>94%151.1BorosilicatePrecision £19.95
400FIP0025 400650>94%251.1BorosilicatePrecision £25.45
400FIP0050 400650>94%501.1BorosilicatePrecision £45.45
400FIP0505 400650>94%551.1BorosilicatePrecision £9.95
400FIP1010 400650>94%10101.1BorosilicatePrecision £12.45
400FIP1313 400650>94%12.512.51.1BorosilicatePrecision £13.95
400FIP1515 400650>94%15151.1BorosilicatePrecision £17.45
400FIP2525 400650>94%25251.1BorosilicatePrecision £22.45
400FIP5050 400650>94%50501.1BorosilicatePrecision £39.95

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Get in touch

Our Multi-Lingual Sales Team are here to help with your requirments:

UK +44 (0)1622 859444
UK +44 (0)1622 850614
UK +44 (0)1622 851078
+1 401 583 7846

International Shipping

We are able to ship to most countries at good rates, please click here for more info.

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