Linear Stepped ND Filters (LSND)

Product Name: Linear Stepped ND Filters (LSND) Model NO.: HB Series Customized: Customized Certification: ISO Shape: Square Material: Glass Principle: Neutral-type Filter Type: Thin Film Filter Thickness Range: 1mm-2mm Usage: Optical Wavelength: 250 Nm - 2500nm Trademark: HB Transport Package: Plastic Container Specification: ISO9001 Origin: Shenyang, China HS Code: 9001901000 Product Description A neutral density filter (ND filter) decreases the intensity of light without changing the relative spectral distribution of the energy. An ND filter is used from UV to IR, so light can be attenuated by rotating or shifting the filter. ND filters are widely applied in many kinds of optical systems.Neutral Density Filter (ND) OperationAn ND filter reduces transmission either by reflection or absorption. A Reflective ND filter uses partial reflection to reduce light transmission evenly, while absorptive ND filters use partial absorption.A Linear Stepped Density filter attenuates light in discrete steps.Filters can be used with white light as well as with lasers. SpecificationsSubstrateBK7,Fused silicaThickness tolerance± 0.1 mmParallelism3 arc minutessSurface quality80-50Density deviation±5%Calibrated wavelength550nmDesign wavelength380nm-2000nm(BK7)250nm-2500nm(Fused silica) Density type :A0.040.10.20.30.40.5 B0.040.20.40.60.81.0 C0.040.40.81.21.62.0 D0.040.10.20.30.40.50.60.70.80.91.0E0.040.20.40.60.81.01.21.41.61.82.0F0.040.30.60.91.21.51.82.12.42.73.0 Standard :PN#LengthWidthOptical densitySubstrateLSND10-B5050.825.4DBK7LSND20-B5050.825.4EBK7LSND30-B5050.825.4FBK7