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Step Linear Neutral Density Filters


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Step Linear Neutral Density Filter

The step linear neutral density filter (ND Filter) can be used for calibration of various illumination systems. The ND filter can be used from 370nm to 2600nm. The step linear ND filter configuration consists of a glass substrate with a spectrally flat neutral density metallic coating. The density variations take place in discrete steps. Step linear neutral density filters are supplied with calibration data. Other configurations and custom step linear ND filters are available on special order.

  Product Number    Product Name  ThicknessSubstrate MaterialSurface QualityParallelismLengthWidth
R00140-10 STEP LINEAR FILTER: BK-7, 25mm x 100mm D=0 to 1, 6 Steps 2mm ±0.2mm
BK-7
80-50 Scratch & Dig
< 3 Arc Minutes
100mm
25mm
R00140-20 STEP LINEAR FILTER: BK-7, 25mm x 100mm D=0 to 2, 6 Steps 2mm ±0.2mm
BK-7
80-50 Scratch & Dig
< 3 Arc Minutes
100mm
25mm
R00160-10 STEP LINEAR FILTER: BK-7, 25mm x 100mm D=0 to 1, 11 Steps 2mm ±0.2mm
BK-7
80-50 Scratch & Dig
< 3 Arc Minutes
100mm
25mm
R00160-20 STEP LINEAR FILTER: BK-7, 25mm x 100mm D=0 to 2, 11 Steps 2mm ±0.2mm
BK-7
80-50 Scratch & Dig
< 3 Arc Minutes
100mm
25mm
R00160-30 STEP LINEAR FILTER: BK-7, 25mm x 100mm D=0 to 3, 11 Steps 2mm ±0.2mm
BK-7
80-50 Scratch & Dig
< 3 Arc Minutes
100mm
25mm

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