Category : Optics (components, coatings, instruments and systems) > Optical instrumentation, systems and accessories

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Absorptive neutral-density filters provide an alternative to metallic neutral-density filters. They are preferred when elimination of backscatter and back reflections are of particular concern.

Absorptive filters vary in thickness from less than a millimeter to nearly five millimeters, depending on the material and the melt. Since there can be large variations between glass melts, actual thickness and glass material may vary in order to guarantee optical density.

Standard Specification:

Optical Material: Optical Neutral Density Glass
Dimension Tolerance : ±0.2mm
Wavefront Distortion: 2λ per 25mm
Parallelism: <3 arc second
Surface Quality: 80-50 scratch and dig
Density Tolerance : ±5%

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List of all articles in this sub-category Optical instrumentation, systems and accessories

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