TECHNIQUE MEASURING RADIUS OF CURVATURE OF LONG-FOCUSED MIRROR Russian patent published in 2000 - IPC

FIELD: technical physics, optical measurement, manufacture of long- focused optical mirrors and their usage. SUBSTANCE: technique is based on formation of parallel light beam, on its direction on to investigated surface, on spatial division of beam after its reflection from mirror, on formation of difference of paths of divided beams and on generation of interference picture which presents base for computation of radius of curvature of mirror. Technique enables radius of curvature of long-focused mirrors to be measured with high precision amounting to 0.06-0.08% and measurement distance to be reduced by 10-100 time. EFFECT: high-precision of proposed technique. 1 dwg, 1 tbl