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![Diaphragm with 3 Double Slits of Different Widths, 1000596 [U14100], Apertures](/thumblibrary/U14100/U14100_01_140_140_Diaphragm-with-3-Double-Slits-of-Different-Widths.jpg)
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![Diaphragm with 3 ruled gratings, 1000599 [U14103], Gratings](/thumblibrary/U14103/U14103_01_140_140_Diaphragm-with-3-ruled-gratings.jpg)
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