METHOD AND APPARATUS FOR MEASURING REFRACTIVE INDEX OF LENS

摘要

PURPOSE: A method and device for measuring a refractive index of a lens are provided to the thickness of the lens with curvature and or the lens of prism shape. CONSTITUTION: A device for measuring a refractive index comprises a first optical system(100) and a second optical system(200). The first optical system focuses on the first side of a measurement object lens. The second optical system comprises a light source(210), a collimating lens(230) and a relay lens(250). The collimating lens switches the light from the light source into the collimated light. The relay lens concentrates the collimated light on the focus. The light source is composed of an optical source module which is controlled so that the light of the different wavelength is selectively radiated. The lens refractive index measurement device more includes a focus tube part(310) and a driving control part(320). The focus tube part observes the focus of the first optical system. The driving control part controls the operation of the relay lens by data detected in the focus tube part.