Bandpass Interference Filters 25.4mm
Description
Essentially a stack of Fabry-Perot cavities, these filters select the transmitted spectrum by constructive and destructive interference at the boundaries between high and low index dielectric layers. Several cavities may be combined to produce a sharper cut-off and to alter the shape of the passband. Two three and four cavity designs are commonly used in these filters according to the specifications required. Absorbing and reflecting layers are also included in the stack to block the transmission of unwanted wavelengths over a wide spectrum from near UV to far IR. When selecting a filter always be certain to consider the spectral characteristics of the source and detector in use. These should be combined with the filter curve to obtain the resulting spectral response of the system.
Bandpass Interference Filters 25.4mm
Specifications |
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|---|---|
| Central Wavelength: | 488 nm |
| Bandwidth (FWHM): | 1 nm |
| Peak Transmittance: | 35 % |
Features
Precise control of center wavelength and bandpass shape
Wide selection of stock wavelengths from 250 nm-1550 nm
Selection of bandwidths
Available in 1/2” and 1” sizes
High peak transmission values
Excellent blocking from UV to IR
Sealed design provides long term stability
For pricing, technical or any other questions please contact the supplier
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How to order?
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Ships from:
United States
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Sold by:
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On FindLight:
since 2017
Frequently Asked Questions
Essentially a stack of Fabry-Perot cavities, these filters select the transmitted spectrum by constructive and destructive interference at the boundaries between high and low index dielectric layers.
They are available in 1/2” and 1” sizes.
A wide selection of stock wavelengths from 250 nm-1550 nm are available.
Always be certain to consider the spectral characteristics of the source and detector in use. These should be combined with the filter curve to obtain the resulting spectral response of the system.
Precise control of center wavelength and bandpass shape, wide selection of stock wavelengths, selection of bandwidths, high peak transmission values, excellent blocking from UV to IR, and sealed design provides long term stability.