Richardson Gratings
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Frequently Asked Questions

Yes, two masters with the same catalog number may have different efficiency curves.

The 53-406E DIFFRACTION GRATING has a groove length of 128 mm and a ruled width of 254 mm. It has an efficiency curve with a spectral order of m = 91, 117 and is unpolarized.

The 53-406E DIFFRACTION GRATING is a type of grating with a specific set of specifications.

The efficiency curve of the 53-406E DIFFRACTION GRATING is relative (not absolute) and was measured in an in-plane near Littrow configuration. Actual efficiency may vary significantly depending on use geometry and measurement technique.

The uncertainty band on the data in the efficiency curve(s) is +/- three percentage points.

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