LINEAR VARIABLE ND: D= 0 to 2

The linear variable neutral density filter is used to attenuate light as the filter is translated. The filters can be used with white light as well as with low power lasers. A large finite aperture can be attenuated by translating two filters in opposite directions. The filters are available in lengths from 5mm to over 200mm. These filters are more sensitive to position at lower density values than are linear transmission filters. The useable wavelength range is from 600nm to 15.0 microns and calibrated at 2.5 microns.

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