Measurement of convex aspheric lens' optical performance using Computer Generated Holograms

摘要

A novel method for measuring the optical performance of convex aspheric lens using Computer Generated Holograms (CGH) as reference component is proposed. The testing setup is based on Mach-Zehnder interferometer. Relevant optical theories of testing setup are described in detail. This method ensures higher fabrication accuracy of CGH, allows accurate figure measurement of optical performance. In order to verify the sensitivity to alignment error using this method, the test model which is accordant to actual measurements is established by use of ZEMAX. Computer simulation is carried out; alignment errors are considered in simulation; interferometric patterns of the primary aberrations in simulation are presented. Results show: the system is sensitive to testing arm than reference arm; tilt is a main error source in testing arm and reference arm; the space error between the collimating lens and the test lens accounts a lot of errors and should be strictly limited.