0.3 OD, 25mm Dia., VIS 0° Coated, Absorptive ND Filter

Product Details Optical Densities from 0.1 to 4.0 VIS 0°, NIR I, and NIR II Coating Options 12.5, 25, and 50mm Diameter Sizes Uncoated HOYA or SCHOTT ND Filters Also Available Anti-Reflection (AR) Coated HOYA Absorptive Neutral Density (ND) Filters feature HOYA colored glass substrates that are AR coated on both surfaces to reduce back reflections in the visible or near-infrared (NIR) spectra. VIS 0°, NIR I, and NIR II broadband AR coatings cover the spectral ranges of 425-675nm, 600-1050nm, and 750-1550nm. These neutral density filters attenuate light via absorption and can be stacked together to achieve custom optical densities to meet application requirements. Anti-Reflection (AR) Coated HOYA Absorptive Neutral Density (ND) Filters are ideal for use in imaging and detection applications to reduce stray light, as well as in general filter stacking applications to control intensity. The standard metric diameters of 12.5, 25, and 50mm are compatible with our TECHSPEC C, S, and T-Mount Circular Optic Mounts for benchtop applications. Specifications General Type of Filter: Absorptive ND Filter Type: Neutral Density Filter Stock No. of Uncoated Filter: #46-212 Physical & Mechanical Properties Diameter (mm): 25.00 Thickness (mm): 2.50 ±0.5 Dimensional Tolerance (mm): ±0.1 Parallelism (mm): <0.02 Optical Properties Optical Density OD (Average): 0.3 ±0.05 @ 400-700nm (Uncoated Filter) Nominal Optical Density @ Center of Coating: 0.28 @ 550nm Nominal Optical Density OD @ 550nm: 0 Nominal Optical Density OD @ 900nm: 0 Nominal Optical Density OD @ 1200nm: 0 Glass/Filter Number: Hoya ND50 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More ND Filter Glass Coating: VIS 0° (425-675nm) Index of Refraction (n d ): 1.50 Surface Quality: 80-50 Transmission (%): 50.0 (average) @ 400 - 700nm Blocking Wavelength Range (nm): 400 - 700 Coating Specification: R avg ≤0.4% @ 425 - 675nm Material Properties Transformation Temperature (°C): 495 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × Reach 250: Compliant ×