ELID Grinding Characterization of Large Schmidt Lens for Large Telescope(Nanoprecision Elid-grinding (continued))

Abstract

This paper introduces a schmidt lens manufacturing process, focusing on its axis-aymmetric aspherical surface manufacturing by synthesizing ELID grinding and arc-enveloped grinding method. For test experiment, an off-axis spherical surface was ground to obtain suitable grinding and ELID conditions. Then, the large axis-aymmetric aspherical concave and convex were ground on the developed grinding system using #325, #1200 diamond cast-iron bond wheels. Grinding characteristics such as attainable form accuracy, surface roughness were investigated.