Linear Variable Filters
Jul 2011Edmund Optics Inc.Request Info
Edmund Optics has introduced linear variable filters designed
for individual and combined use for maximum versatility. 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. A single linear variable filter can replace an entire filter set, rendering it economical and compact.