Linear variable bandpass filters

Edmund Optics has introduced new linear variable bandpass filters, which provide the high transmission and deep rejection necessary to isolate narrow spectral regions for use in a variety of applications.

The precision coated optical filters feature spectral properties that vary linearly across the length of the filter. They provide an optimum input beam diameter of 0.5 x 10.0mm. Delivering OD4 blocking, they provide high transmission across narrow bandwidths. The filters offer blocking of greater than 4.0 optical density at 1.5 per cent of the laser wavelength.

Deep blocking of unwanted light maximises system performance at the required wavelength. The spectral response can be adjusted by simply moving the filter's position relative to the light source. A single filter can replace multiple dedicated filters, which simplifies system setup and minimises weight. Linear variable bandpass filters are available in VIS and NIR models.