NEUTRAL DENSITY FILTERS
Aug 2005Asahi Spectra Co. Ltd.Request Info
Linear variable neutral density (ND) filters are available from Asahi Spectra Co. Ltd. Their optical density continuously varies from 0.04 to 5.0 via proprietary monitoring technology. Applications include precise adjustment of laser light intensity. Fashioned from a quartz substrate, the filters measure 100 × 50 mm. A circular ND filter also is available, with the same varying optical density.