Neutral Density Reflection Type Filters

Neutral Density Reflection Type Filters

Material	Neutral density glass
Diameter tolerance	+0/-0.2 mm
Clear Aperture	90%
Surface Quality	60-40 scratch and dig
Surface Flatness	[email protected] nm
Parallelism	<3 arcmin
Designed for VIS range (400-700 mm)
Uncoated, Unmounted

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Description Metrology

Neutral density laser radiation filters with custom transmittance, dimensions and shape. Neutral density reflexion type filters decrease intensity of light without altering the relative spectral distribution of the energy.

Altechna metrology lab applies following product inspection:

Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards

Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc.

Transmittance (Spectrophotometer, laser)*

Flatness (Interferometer)

Wavefront distortion (Interferometer)

Parallelism (Goniometer, interferometer)

*(…) used equipment

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Dimensions	mm
Shape	Round Rectangular
Transmitance (%)	%
Optical density
Mounted	No Yes
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