3.5 OD 25mm Dia., NIR ND Filter

Product Details Ideal for NIR Wavelengths 700-1100nm Optical Densities Ranging from 0.3 to 3.0 TECHSPEC Near-IR (NIR) Neutral Density (ND) Filters feature a spectrally flat region between 700 and 1100nm, outstanding parallelism, and exceptional surface characteristics. The combination of high tolerance and broadband performance makes our filters ideal for attenuating a wide range of IR sources. The UV Fused Silica substrate features a low coefficient of thermal expansion and excellent surface quality, making these filters suitable for attenuating low power lasers, including lasers at the 1064nm Nd:YAG wavelength. Other applications include NIR spectroscopy, machine vision, and analytical chemistry. TECHSPEC Near-IR (NIR) Neutral Density (ND) Filters may be stacked to obtain a variety of optical densities. Orient the mirrored side toward the source at a 0° angle of incidence. Optical Densities of 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 are available in a Pre-Loaded Filter Wheel . Note: Due to supply chain issues, our kits may be delivered with an alternative packaging solution in place of a wooden box. For any questions, please contact [email protected] . Specifications General Type of Filter: Reflective ND Filter Type: Neutral Density Filter Physical & Mechanical Properties Diameter (mm): 25.00 +0.0/-0.2 Thickness (mm): 3.00 ±0.10 Clear Aperture (%): 80 Parallelism (arcsec): <5 Optical Properties Optical Density OD (Average): 3.5 Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More Fused Silica (Corning 7980) Coating: NIR (700 - 1100) Reflective Material: Metallic Based ND Surface Quality: 40-20 Transmission (%): 0.03 Blocking Wavelength Range (nm): 700 - 1100 Transmitted Wavefront, P-V: λ/4 Optical Density Tolerance (%): ±10 Regulatory Compliance RoHS 2015: Compliant × Certificate of Conformance: View × REACH 241: Compliant ×