Glass plates with 7 sets of slits and bars of different widths for quantitative diffraction experiments.
Diameter of support: 40 mm
Irregularities: <1 µm
Slit widths: 30, 40, 60, 80, 100, 150 and 200 µm
Bar widths: 30, 40, 60, 80, 100, 150 and 200 µm
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