Objective One of the most important parameters of refractor head is the diopter accuracy and the test difficulty is how to conduct non-destructive measurements as the equipment in use.Methods This optical electromechanical integrated special test equipment is composed of a series of coaxial systems,including light source,collimating objective lens,measuring object,refractor heads,self-calibration ball or cylindrical lens,and reading system.The non-destructive measurement of certain important refractor head parameters,such as focal vertex,axial position and prism,is achieved successfully by using this equipment.Results The uncertainty analysis and the measurement results of the refractor head parameters indicate that the platform can provide stable test results,distinct error sources and high measurement precision.Conclusions This platform meets the requirements of technical organization for product registration test and metrological verification.
|