Knight Optical (UK) Ltd Datasheets for Optical Filters

Filters are used to attenuate light across a certain portion of the spectrum.
Optical Filters: Learn more

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Product Name Notes
Acrylic colour filters are similar to colour glass filters, achieving their colouration by the use of dyes during the manufacturing process. Acrylic filters are cheaper than glass filters, easier to...
At 0° incidence hot mirrors transmit the visible and reflect the near infra-red (heat) spectrum typically found in tungsten light sources. Hot mirrors therefore remove much of the energy that...
Colour Glass Filters are polished sheets of special glass that have been cast with a dye included in it. Colour Glass Bandpass Filters are generally relatively cheap and very stable.
Colour Glass Filters are polished sheets of special glass that have been cast with a dye. Colour Glass Filters generally are relatively cheap and very stable. The disadvantage with them...
Colour Glass filters are useful for selective wavelength absorption and therefore achieve high out of band blocking. Colour glass type Longpass filters have very low transmission in short wavelengths and...
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They...
Knight Optical offers these carefully designed NIR bandpass filters for use in ANPR/ALPR camera applications. Designed specifically to work at maximum efficiency transmitting over 90% at the commonly used LED...
Knight Optical’s complete range of cost effective bandblocking dichroic filter sets offer superior transmission, reflection and absorption characteristics Dichroic band blocking filters are designed to block an isolated bandwidth while...
Knight Optical’s complete range of cost effective bandpass dichroic filters offer superior transmission, reflection and absorption characteristics Dichroic bandpass filters are designed to transmit highly over a specific limited bandwidth...
Knight Optical’s complete range of cost effective longpass dichroic filters offer superior transmission, reflection and absorption characteristics. Longpass filters are designed to transmit wavelengths higher than the cut on point...
Knight Optical’s complete range of cost effective shortpass dichroic filters offer superior transmission, reflection and absorption characteristics Shortpass filters are designed to transmit wavelengths lower than the cut off point...
Knight Optical’s range of dichroic colour correction filters offer pure, true to life colour temperature adjustment for entertainment and photography. Colour correction filters are typically used in mixed lighting applications...
Knight Optical's broadband and extra broadband range of interference band-pass filters are used to isolate and transmit a specified narrow wavelength and reflect all other incident wavelengths. Our stock range...
Metallic Neutral Density filters comprise a thin metallic layer on a borosilicate glass or UV grade fused silica polished window. Metallic ND filters attenuate the light by reflection and thus...
Neutral density filters attenuate light by a constant amount that is, to first order, independent of the wavelength. Gelatin ND filters are the cheapest but tend to have more fluctuation...
Our IR-cut filters are designed to block by means of reflection the NIR spectrum while transmitting highly in the visible range. Our filters also block UV light below 350nm. ANPR/ALPR...
Our mounted range UV interference filters are used to isolate and transmit a specified narrow wavelength and reflect all other incident wavelengths in the ultra-violet and visible spectrum. These high-quality...
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...
The colour effects within Wratten 2 Colour filters are achieved using organic dyes in a gelatine material which is not possible in colour glass. Although wratten bandpass filters are less...
These colour glass filters are mounted in high quality black anodized rings for easy integration into aesthetic lighting, imaging and cosemetic laser applications. Our extensive filter range includes long pass,...
These interference band-pass filters are used to isolate and transmit a specified narrow wavelength and reflect all other incident wavelengths. Knight Optical's stock range of high quality standard bandwidth visible...
This range of interference band-pass filters are used to isolate and transmit a specified narrow wavelength and reflect all other incident wavelengths in the spectrum Typically, our filters are 3-7...
This range of UV type interference band-pass filters are used to isolate and transmit a specified narrow wavelength and reflect all other incident wavelengths in the ultra-violet spectrum. These high...

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