Rotary optical filter apparatus integrated with cooling fan...

Scrolling color changer

Scrolling primary color changer

Solid colloidal optical wavelength filter

Spatial filter, a system and method for collecting light...

Spectrum filter wheel

Superconducting reflection filter

Superconducting searching filter

Superconducting submicron filter

Superconducting tunable inorganic filter

Temperature compensated optical filter

Temperature control apparatus for controlling metallic vapor pre

Thin film forming method, display, and color filter

Transflective colour filter, and a method of manufacturing such

Tuneable optical filter

Underwater color correction

Underwater color correction

Universal optical filter holder

Variable intensity dimmer

Variable wavelength light filter and sensor system