INTERFERENCE METHOD OF MEASURING CURVATURE RADIUS OF OPTIC SPHERICAL SURFACES

摘要

The invention relates to the instrumentation engineering and may be used in controlling the radius of curvature of the spherical optical surfaces, in particular the test glasses. The aim of the invention is to improve the accuracy control. Two coaxially arranged on a common substrate transmissive axial synthesized hologram set pe- eds controlled surface. Both holograms illuminated by coherent collimated light beam parallel to their axes, and forming with them two homocentric beam with centers arranged on the calculated distance along the axis holograms and homocentric beams directed to the test surface. Two controlled beam reflected from the surface passes through the same hologram give two kvazikollimirovannyh beam, which is combined with the reference beam are recorded with the two interference patterns. By mutual bending of the interference fringes of two pictures is judged on the magnitude and sign of the controlled radius departing from the calculated distance between the center E of homocentric beams. 2 yl. (/) FROM