Automatic measurement arrangement for spectacle or contact lens refractive powder - contains position measurement and eccentricity evaluation units deciding acceptability of measurements

摘要

The automatic lens measurement arrangement contains a measurement unit with an optical system for detecting a refraction parameter of the lens, a characteristic value computation unit, a display unit, an eccentricity computation unit and a position measurement unit for the optical axis. The position measurement unit determines whether the eccentricity determined by the computation unit lies within a defined range or not so as to decide whether the measurement and/or marking is acceptable. The display shows the optical axis position measurement. ADVANTAGE - Enables simple lens positioning and facilitates measurement and alignment of progression zone of progressively strengthening lens.