Yunfeng Peng

Technology and Application of Ultra-precision Machining for Large Size Optic

The ultra-precision machining technology of large size optic is a comprehensive application of various sciences, which promotes the development for civil and national defense use. Under the processing of national optical project, our country makes great progress in this field. The development of ultra-precision machining technology for large size optic in micro/nano machining and measuring laboratory of Xiamen University is introduced, particularly in grinding equipment, grinding process, precise measuring, controlled bonnet polishing, environment monitoring, mid-spatial frequency error assessing and et al. From the requirement of the ultra-precision machining, the laboratory uses the experience of other countries for reference and integrates the above technology, then forms an intellectual property of grinding and polishing system independently for large size optic manufacture.

Anti-tilting technology of online measurement for large-size optical lens

Online measurement is used widely in the measurement of large-size optical lens due to its advantage that it will not introduce the positioning error. But online measurement still introduces some other errors, especially the tilting error, and the influence of the tilting of the workpiece is serious. In order to solve this problem, an anti-tilting technology will be presented in this paper. Because of the small value of tilting, it cant be adjusted by manual operation. To solve this problem, a method that deal with measurement data by surface fitting and rotation transformation have been applied. Experiments were carried out to verify the feasibility and the validity of this technique.