Zhisheng Yun Xian Institute of Optics and Fine Mechanics (Singapore) Zhongben L. Liu Xi'an Institute of Optics and Precision Mechanics (China) Yulin Li Xi'an Institute of Optics and Fine Mechanics (China)
A simple method of testing deep aspheric surfaces is presented. The apparatus consists of a Twyman-Green interferometer and a liquid compensatory container. Two lenses, one with spherical surfaces and the other with a spherical surface and an aspheric surface, were tested by using this method. The device is very simple and easy to assemble.