Absorptive Neutral Density Filters use optical absorption materials to uniformly attenuate full-spectrum (400-2000nm) light intensity without color bias, offering a wide range of optical density (OD) options. Made from high-homogeneity optical glass or fused silica, they are coated with anti-reflective layers (<0.5% reflectance) to reduce stray light and support custom sizes from 3mm to 50mm. Ideal for laser power regulation and camera exposure control, these filters offer low dispersion, high damage threshold, and humidity/temperature resistance for stable long-term use.
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