Basket (0)
Knight Optical(UK) Ltd - sales@knightoptical.co.uk - +44 (0)1622 859444

Custom

What are you looking for in Custom?

Knight Optical is supply an extensive custom optical filters for use in the UV, Vis, and NIR wavebands. The optical filters that are available as custom, range include:

Custom range of Notch and Band Reflecting Filters: comprise of notch, multi-notch, multi-band, dichroic beamsplitters, and mounted ones. These filters are made from thin films of material that have differing refractive indices and thickness. The filters are usually used on-axis, and at 45°, as a difference in angle from 'zero' will increase the path length of the rays through the filter. This has the effect of moving the pass band toward longer wavelengths. The filters are used to isolate, for example, emission lines from a source or fluorescent from background. Laser lines can be isolated to maximize the signal relative to noise ratio.

Custom Bandpass Filters: comprise of interference filters, coloured glass, gelatin, polyester and wratten gelatine, variable bandpass and edge, fluorescence, dichroic band-pass and blocking, mounted singles, and sets of mounted and unmounted. The interference filters are made from thin films of material that have differing refractive indices and thickness, whilst the glass and gelatin have a dye within the substrate. Our range of custom band-pass filters are available as single items or as boxed sets.

Custom Long Wave Pass Filters: comprise individual and boxed sets. These filters can be made from thin films, coloured glass, and coloured gelatin and coloured acrylic plastic. 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.

Custom Short Wave Pass Filters: comprise individual and boxed sets. These filters can be made from thin films, coloured glass, and coloured gelatin and coloured acrylic plastic. These filters block the long wavelengths and transmit the short wavelengths 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 long 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. When the filters transmit the infrared and reflect the visual or the other way round, they are termed 'hot' or 'cold' mirrors.

Custom Neutral Density Filters: comprise individual and boxed sets. These filters can be made from thin films, varying blackness glass and plastic substrates. These filters have various levels of transmission across a broad spectrum of wavelengths. The filters are usually consist of a range from 0 to 1 in 0.1 OD and then every 1 OD from 1 OD to about 10 OD. An OD is defined as ten times the log (base 10) of the transmission, for example, a 1OD transmits 10%, and 2 OD transmits 1%. Sets are available for OD 0.1 to 1, 1 to 10, and the two sets as one set. These filters will have transmission wavebands in the 0.2 to 1µm with, usually, for example, optical grade glass or plastic, substrates and silica, CaF2 for the UV. Other densities and substrates are available.

Knight Optical’s custom optical filters are utilized in a massive range of optical systems, from automatic number plate recognition systems to fluorescence microscopy, from gas detection to lighting design.

Uses of our optical filters span medical, defence, Industrial, commercial, electronics, research and entertainment markets and many sectors and applications.

Our custom filter ranges include filters for passing and blocking wavelengths from UV, through visible to NIR and IR.

Knight Optical supply high quality custom optical filters made to our exact specification.
Every component is individually tested on our Agilent Cary 5000 spectrometers fitted with a UMA device for testing filter materials and coatings in transmission and reflection at any given angle. We also have a DRA device fitted for testing complex coatings. Our Agilent 660 FTIR spectrometer is used for materials and coatings between 3.5µm and 45µm. All 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 custom range of optical filters and service can improve your instrumentation and supply chain experience.

Get a Custom Quote

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.

This site requires cookies in order to work properly. By continuing to use this site you are agreeing to our cookies policy.

Accept