Glass plates with 12 different single and double diffraction apertures for quantitative diffraction experiments.
Diameter of support: 40 mm Aperture irregularities: <1 µm
Single apertures: Diameters: 20, 30, 50, 100, 200 and 500 µm
Double apertures: Separations: 100, 200 and 400 µm Diameter: 50 µm
Rectangular apertures: Dimensions: 70 x 70 µm², 200 x 200 µm² and 70 x 200 µm²