We welcome all enquiries relating to bespoke bandpass filters for all kinds of optical applications and can advise on the most suitable substrates, thin films and other methods to produce the optical bandpass filters you need.

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Depending on the range of wavelengths transmitted, optical bandpass filters can be used for an incredibly diverse range of applications, including for example:

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The result is an output that contains only the desirable frequencies and wavelengths, while the unwanted parts of the spectrum are blocked.

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By combining filters and methods, it is possible to produce single laminated bandpass filters with very specific and complex properties, to achieve all kinds of electro-optical applications.

They can be used to transmit signals in a specific range of frequencies, from a very narrow band through to a very wide range.

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Bandpass filters work by absorbing or reflecting unwanted wavelengths, and only transmitting the desirable parts of the visible light spectrum.

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For example, very high transmission across the entire FWHM range, with steep drop-off and very low transmission outside of that range, is a sign of a highly effective filter with very little ‘noise’ in the output.

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Envin Scientific manufacture bespoke optical bandpass filters with very specific characteristics, to meet and overcome a wide variety of electro-optical challenges.

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At Envin Scientific the standard range of wavelengths that can be blocked and transmitted by our high-precision optical filters is from 175-200 nm to 8 microns.

Optical bandpass filters transmit (or ‘pass’) a specific range (or ‘band’) of frequencies. This can include visible light, as well as non-visible wavelengths at the infrared and ultraviolet ends of the spectrum.

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While there are some limitations on how thin a bandpass filter can be, Envin Scientific’s optical thin-film filters range from as little as 0.1 mm to several centimetres thick and can be from 1 mm to over 100 mm in size.

Optical bandpass filters are filters that allow a certain spectrum of light to transmit through the substrate, while blocking unwanted frequencies using absorption, reflection or both.

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