FIELD: measurement technology. SUBSTANCE: gear includes autocollimator, interferometric checker with convex or concave reference spherical surface, device for setting and axial movement of tested part arranged in sequence along test axis, unit measuring value of movement of tested part. Radius Rref of reference surface differs from radius Rmea of measured surface by value not exceeding value of maximum possible movement of tested part. Measured radius Rmea is established with the help of mathematical formula. EFFECT: expanded range of measurement of radius of spherical surface to values considerably exceeding value of movement of tested part. 4 dwg
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SU1024706A1 |
