Close

Search

Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
SPECIAL ANNOUNCEMENT
2016 Photonics Buyers' Guide Clearance! – Use Coupon Code FC16 to save 60%!
share
Email Facebook Twitter Google+ LinkedIn

Linear Variable Filters

Photonics.com
May 2011
Edmund Optics Inc.Request Info
 
BARRINGTON, N.J., May 6, 2011 — Edmund Optics has introduced its linear variable filters designed for individual and combined use for maximum versatility; they are available in long- and short-pass versions.

They 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. The shift enables broad filtering capabilities.

The short- and long-wave filters work inversely to one another. The former passes light throughout the filter's length until a blocking band is reached, while the latter blocks light until a transmission band is reached. The 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, rendering it economical and compact.

Linear variable filters enable blocking and passing of targeted wavelengths. When used independently, the short-wave filter has a range of 330 to 750 nm with average transmission of 97% from 400 to 750 nm. The long-wave filter has a wavelength range of 300 to 845 nm and an average transmission of 97% across its entire wavelength range for maximum efficiency. Both provide blocking of OD >4. When they are combined, they can operate as a laser-line filter or as a variable bandpass filter with a tunable center wavelength and bandwidth for a vast array of applications.

To reduce scattered light and harmonics, combined long- and short-wave linear variable filters may be synchronized with a single moving grade spectrometer. Combined filters also can be used as a single variable excitation filter for a wide variety of fluorescence applications using white-light sources.


REQUEST INFO ABOUT THIS PRODUCT

* Message:
(requirements, questions for supplier)
Your contact information
* First Name:
* Last Name:
* Email Address:
* Company:
Address:
Address 2:
City:
State/Province:
Postal Code:
* Country:
Phone #:
Fax #:

Register or login to auto-populate this form:
Login Register
* Required
GLOSSARY
blocking
The process whereby blanks are attached to a block in a position for grinding or polishing.
fluorescence
The emission of light or other electromagnetic radiation of longer wavelengths by a substance as a result of the absorption of some other radiation of shorter wavelengths, provided the emission continues only as long as the stimulus producing it is maintained. In other words, fluorescence is the luminescence that persists for less than about 10-8 s after excitation.
Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x We deliver – right to your inbox. Subscribe FREE to our newsletters.