Linear gradient neutral density filter

Strip gradient neutral density filter (referred to as strip gradient density sheet) can linearly attenuate light intensity by moving the filter or light source. Accurate adjustment of light energy is achieved in the length direction of the strip, while maintaining neutral spectral light energy distribution, achieving adjustable and controllable light energy. It is divided into metal alloy type variable density sheets and low inversion type variable density sheets (GND). It is suitable for both ordinary light sources and laser light sources. When two pieces are combined and translated in reverse, attenuation of light with larger beam spots can be achieved. Optional use of spectral range 250nm-2500nm. Special size, density, and wavelength density sheets can be customized.