Colour Glass Filters for CMOS sensors

Featured Product from Knight Optical (UK) Ltd

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CMOS sensors are used within commercial grade Digital SLR cameras as a replacement for the more expensive CCD. These CMOS sensors are extremely sensitive to IR light, which can lead to discolouration. IR cut filters are used to block the IR light, meaning that photographs are taken with life-like colours. Colour Glass Filters can be used in variations of Bandpass, Long pass and Short pass, depending on which wavelengths of light need to be blocked resulting in different key areas being more easily distinguished.

Knight Optical offers Colour Glass and IR cut filters for such an application, with a wide range of band widths and cut on/off wavelengths. As above these are available as Bandpass, Long pass or Short pass filters and we can also offer customised filters with coatings specific to the wavelength of your choice.

We hold a massive inventory of IR cut, Bandpass, Long Pass and Short Pass filters:

  • Stock sizes of 5-50mm diameter or 5-50mm length/width and 1mm thick
  • Custom shapes and sizes available
  • Alternative thickness substrates available.

Typical specs:

Material:                             Colour Glass and Borosilicate/D263T or equivalent

Diameter:                           +0.0 / -0.20 mm

Length/width:   ± 0.20 mm

Thickness:                           ± 0.20 mm

Surface quality: <60-40 scratch/dig or <20:10 for HD cameras

Parallelism:                        <3 arcmin


Wavelength cut-on listed in table is transition cut-on wavelength (T=Tmax/2)

Wavelength cut-off listed in table is transition cut-off wavelength (T=Tmax/2)

Wavelength peak is centre wavelength (specific to Bandpass Filters)

 All our Colour Glass Filters are checked for quality in our state-of-the-art Metrology laboratory using our Varian Cary 5000 spectrophotomer’s fitted with UMA, allowing us to work to the highest QA standards and meet the tolerance specifications on these precision components.

Contact our technical sales team to discover how Knight Optical’s high quality Colour Glass Filters and superior service can improve your instrumentation and supply chain experience.

 Tel +44(0)1622 859444 | Email

Tel +(001) 401 583 7846 | Email