The diaphragms are made from stainless steel, offering complete opacity. A lateral row of five 2 x 0.2mm precision etched slits 5mm apart is provided as a useful calibration tool. The diaphragms carry slits from 0.12mm to 0.8mm wide in varying arrangements.
Diaphragm with 3 Single Slits:Slit widths: 0.12mm, 0.24mm and 0.48mm.
Diaphragm with 3 Double Slits:Double Slit A: Slit width: 0.12mm, Spacing: 0.6mm.Double Slit B: Slit width: 0.24mm. Spacing: 0.6mm.Double Slit C: Slit width: 0.24mm. Spacing: 1.2mm.
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