| 摘要 |
Device for obtaining a model of the width of a gap used for certifying diffractometers, characterised in that it has a movable table (2) with a cylinder (10) place on it and a glass plate (7) mounted in a bracket (6), equipped with a blade (8) situated above the cylinder (10), the vertical axis of symmetry of the cylinder (10) lying in the plane of the blade (8) and is parallel to it, and there is an intereferometer (3) fixed to the casing (1), whose mandrel (4) is tied with the table (2) and the bracket (6) of the glass plate (7).<IMAGE>
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