Hoya W-ND Neutral Density Filter – 50x50mm Square Optical Glass

HOYA W-ND Series Neutral Density Filters for Industrial ApplicationsHOYA CANDEO W-ND Series neutral density filters are precision wideband optical attenuators designed to uniformly reduce light intensity across UV, visible, and near-infrared wavelengths. Engineered for industrial imaging, machine vision, laser attenuation, and scientific research. Standard 50x50mm square format.Key Features Uniform attenuation across UV, visible, and NIR wavelengths Precise transmittance values at 405nm, 546nm, and 694nm Neutral color balance with minimal spectral variation Precision optical glass construction (1.00mm thickness) Standard 50x50mm square format for industrial applications Suitable for laser attenuation, photometry, and broadband light control Spectral TransmittanceTechnical Data Item Standard Value (Internal Transmittance) Color Specification (Std. Illuminant A) Thickness (mm) Refractive Index (600nm) Chemical Property Thermal Properties α 100/300 (×10⁻⁷/K) Mechanical Properties Specific Gravity (d) τ405nm τ546nm τ694nm x y DW DA Tg (°C) Ts (°C) HK FA W-ND9 0.025±0.01 0.04±0.02 0.08±0.02 0.463 0.404 1.00 1.521 3 2 490 545 78 415 109 2.46 W-ND3 0.06±0.02 0.10±0.02 0.17±0.03 0.454 0.404 1.00 1.516 3 2 485 545 75 416 114 2.44 W-ND4 0.27±0.03 0.31±0.03 0.39±0.04 0.445 0.405 1.00 1.508 3 2 490 555 70 417 111 2.42 W-ND5 0.56±0.03 0.57±0.03 0.62±0.03 0.446 0.408 1.00 1.506 3 2 490 560 68 416 124 2.42 W-ND11 0.76±0.02 0.77±0.02 0.79±0.02 0.446 0.408 1.00 1.504 3 2 485 565 66 423 110 2.40 * Click each item name to download the HOYA CANDEO technical data sheet (PDF).📋 Quality & Compliance Information For ISO certifications, environmental compliance, 12-month warranty details, and handling guidelines, visit our Industrial Filters - Quality & Compliance page.📊 Colored Glass Filters Comparison Chart Compare optical properties across all HOYA CANDEO colored glass filter series. View Comparison Chart →