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.