H-K9L premium optical glass ensures superior clarity and minimal distortion for professional-level photography and optical applications. Versatile diameters of 12.5 mm and 25 mm, along with a sheet size of 50 x 50 mm, suitable for various lenses and experimental setups. The optical density range of 0.1 to 1.0 allows precise light control, making it ideal for reducing brightness and enhancing the image. The wavefront transmission error of λ/4@633 nm ensures in critical optical applications, ensuring accurate results. Designed for a wide range of application wavelengths of 400-1100nm, making it for visible and near-infrared light experiments.
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