Linear Variable Filters

Continuously Variable Filters (also called Linear Variable Filters) are optical filters whose spectral properties (e.g., centre or edge wavelength) change continuously along one physical dimension of the filter. By sliding or rotating the filter in a light path, you can tune the transmitted wavelength or create an adjustable bandpass over a wide wavelength range, replacing many fixed filters with a single tunable component. They offer steep edges, high out-of-band blocking, and cover various types such as bandpass, long-wave-pass, short-wave-pass, dichroic and order-sorting filters.