MULTIPLE-BEAM INTERFEROMETER TO MEASURE PARAMETERS OF PARAMETERS OF SPHERICAL SHELL Russian patent published in 2000 - IPC

FIELD: measurement technology, optics. SUBSTANCE: invention can be used to test parameters of clear spherical shells. Multiple-beam interferometer has lighting system and optical unit made of two mirrors that can move along optical axis, spherical shell which center lies on optical axis, recording system placed in path of radiation passed through optical unit or reflected from it. One mirror is spherical with curvature center lying on optical axis, second mirror is flat and is so positioned that radiation beam focuses on point of its crossing with optical axis. EFFECT: enhanced sensitivity and precision of measurements. 1 cl, 3 dwg