FIELD: physics.
SUBSTANCE: interferometer has a coherent radiation source, a collimator, a semitransparent mirror, an optical wedge and video control unit. The optical wedge is mounted on a holder which is rigidly joined to the analysed object. The video control unit consists of a high-speed video camera and apparatus for recording images of a varying interference pattern. The video camera, semitransparent mirror and the optical wedge lie on one optical axis which is perpendicular to the mirror-finished surface of the analysed object.
EFFECT: improved operational properties.
1 dwg
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