Visible Bandpass Filters
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.
Visible Bandpass Filters
Specifications |
|
|---|---|
| Central Wavelength: | 390-780 nm |
| Bandwidth (FWHM): | 10-40 nm |
| Peak Transmittance: | 30-75 % |
| Diameter: | 12.7 or 25.4 mm |
Features
• Precise control of center wavelength and bandpass shape
• Wide selection of stock wavelengths from 390 nm-1550 nm
• Selection of bandwidths
• Available in 1/2” and 1” sizes
• Excellent blocking from UV to IR
For pricing, technical or any other questions please contact the supplier
- No registration required
- No markups, no fees
- Direct contact with supplier
Contact Supplier
How to order?
-
Ships from:
United States
-
Sold by:
-
On FindLight:
since 2017
Frequently Asked Questions
Visible Bandpass Filters are essentially a stack of Fabry-Perot cavities that select the transmitted spectrum by constructive and destructive interference at the boundaries between high and low index dielectric layers.
The range of stock wavelengths available for Visible Bandpass Filters is from 390 nm-1550 nm.
Visible Bandpass Filters are available in 1/2” and 1” sizes.
When selecting a filter, it is important 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.
The absorbing and reflecting layers in Visible Bandpass Filters are included in the stack to block the transmission of unwanted wavelengths over a wide spectrum from near UV to far IR.