Linear variable filters

Delta has introduced a new powerful combination of linear variable filters, offering a Linear Variable Long Wave Pass filter (LVLWP), the corresponding Linear Variable Short Wave Pass filter (LVSWP) together with a Linear Variable Dichroic. Each of the filters can be used separately.

A Linear Variable Filter (LVF) is a wedged filter whose spectral properties vary linearly. A single LVF can replace a number of dedicated filters in an instrument. It is possible to adjust the position of the edge or centre wavelength by sliding the filter with respect to the incident light, while maintaining deep blocking throughout the whole tuning range. The new linear variable NIR band pass filter extends the application range of LVF largely.