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.

High-pass filter

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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All-pass filter

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.

Butterworth filter

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

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

In an effort to improve our products, Advanced illumination (Ai) will update the LEDs used in the DL097 design. This change will result in a brighter, more uniform light at the same price. Customers may still buy the current revision of this model until September 23rd of 2016. After that time, orders for these products will be converted to their respective DL097 Revison A models.

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.

Additionally the white LED color temperture will be changing from 6100K to 5500K. Orders for customized (dash numbers) versions of DL097 will be honored until March 17th of 2017. Ai will be actively working with customers for those products to simplify the transition.

Optical Bandpass filter

Band passfilter circuit

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.

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

Lowpassfilter

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

We work closely with our vendors to provide high-quality LED lighting for machine vision applications. Visit our PRODUCTS section to discover an LED lighting solution for your vision application and choose "CONFIGURE THIS LIGHT" to customize a light to meet your needs.

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

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.

band passfilter中文

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.