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Edmund Optics Introduces Linear Variable Filters
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Edmund Optics (EO) has introduced its Linear Variable Filters which can be used for various fluorescence applications.
Designed for both individual and combined use, short and long-wave Linear Variable Filters allow for blocking and passing of targeted wavelengths. Used independently, the short-wave linear variable filter has a wavelength range of 330 - 750nm with an average transmission of 97% from 400 - 750nm. The long-wave linear variable filter has a wavelength range of 300 - 845nm and an average transmission of 97% across the entire range. When combined, Linear Variable Filters can operate as a laser-line filter or a variable bandpass filter with tunable center wavelength and bandwidth.
A single filter can replace entire filter set
Linear Variable Filters are manufactured with an interference coating that is intentionally wedged in one direction, creating a linear shift of the center wavelength across the length of the entire substrate. This linear shift allows the broad filtering capabilities that are demonstrated by the Short-Wave and Long-Wave Variable Filters.
The two types of filters - Short- and Long-Wave - work inversely to one another. The Short-Wave Variable Filter passes light throughout the filter's length until a blocking band is reached, while the Long-Wave Variable Filter blocks light until a transmission band is reached. These blocking and transmission bands may be adjusted by reorienting the filter to the light source. Using its broad blocking and transmission range, a single linear variable filter can replace an entire filter set, making them extremely economical and saving valuable space.
When synchronized with a single moving grading spectrometer, combined long and short-wave linear variable filters reduce scattered light and harmonics. In addition, combined linear variable filters can be used as a single variable excitation filter for various fluorescence applications using white light sources.
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Keywords: Edmund Optics EO Filter Fluorescence fluorescence applications Light Microscopy Linear Variable Filters
Edmund Optics Inc.
101 E Gloucester Pike
NJ 08007 Barrinton
USA
Tel: + 1 856 547 6803
Web: http://www.edmundoptics.com
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