Fixed Neutral Density Filters
Technical Parameters Substrate BK7 、Fused Silica Thickness tolerance ±0.1mm Clear Aperture 90% of the total area Parallelism 3’ Surface quality 80-50 Optical density standard deviation ±5% Calibration wavelength 550nm Design wavelength 380nm-2000nm (BK7)250nm-2500nm (Fused Silica) Standard products size(mm) OD T% Substrate Φ12.7 1.0 10.0 % BK7 Φ12.7 2.0 1.0%…