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

Infra-red long wave pass filters

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Knight Optical is able to supply optics for use in the IR (1to 20µm) wavebands. The optical filters that are custom made, and include:

Long Wave Pass Filters comprise individual and boxed set. These filters are made using IR substrates such as silicon, sapphire, germanium, IR quartz etc. with thin films of material that have differing refractive indices and thickness to achieve very shape cut-on at required wavelength in the Infrared region. The filters are used to block the short waveband and transmit the long wavelength and therefore serve to remove any non-required wavelengths and transmit the required ones. These filters can help with reducing the noise and thus improve the signal to noise ratio. They can be used in combination with the short wave pass filters to form a bandpass filter. This combination can have variable bandwidths that are tuned by the use of different long and short pass filters.

Typical use is to block a broad band of IR to enhance the signal, such as blocking unwanted radiation from man-made or natural events.

Knight Optical supply high quality IR Long Pass Optical Filters optical components made to our exacting specification.
Every component is individually tested by our highly skilled technicians in our state of art metrology lab to ensure all components meet our high quality standards.

Contact our multilingual technical sales team and discover how Knight Optical’s high quality IR Long Pass Optical Filters and service can improve your instrumentation and supply chain experience.

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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

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

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