FIELD: contactless test of form of reflecting surface of convex hyperbolic mirrors of bigger diameter with central screening. SUBSTANCE: proposed interferometer has former of working and reference wave fronts including working and reference branches, control spherical mirror installed in working branch, corrector of spherical aberration installed in working branch between former of working and reference wave fronts and control spherical mirror, unit for unloading of tested mirrors. Corrector installed between former of working and reference wave fronts and test spherical mirror is single-component one, it presents plane-parallel plate with systems of holographic relief deposited on it. Control spherical mirror and corrector of spherical aberration form compensator of aberration of normals to tested surface and makes up working branch of unequal-armed interferometer together with tested hyperboloid. EFFECT: enhanced reliability of interferometer. 2 cl, 2 dwg
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