基于虚拟双目相位偏折的自由曲面透明光学元件绝对面形测试技术研究

项目名称： 基于虚拟双目相位偏折的自由曲面透明光学元件绝对面形测试技术研究

项目编号： No.61307017

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 马锁冬

作者单位： 苏州大学

项目金额： 24万元

中文摘要： 自由曲面光学元件能够在有效地校正系统像差的同时，实现光学系统的紧凑化和高透过率。因而，将其应用到光电系统的设计和实现中具有十分重要的意义。加工与检测作为光学元件制造过程中重要而密不可分的两部分，检测精度的高低往往直接决定了加工成型效果的优劣。目前，在自由曲面（透明）光学元件的制作过程中，尚缺乏一种绝对面形测量技术：能够实现在简单系统结构下的大动态范围、高精度、高效能在位检测。针对这一需求，本申请以相位偏折术、立体视觉和虚拟成像技术为基础，提出一种应用于自由曲面透明光学元件的虚拟双目相位偏折绝对面形在位测量技术。对包括系统建模与全链路仿真、柔性的全局优化系统标定、绝对相位恢复误差的校正、虚拟双目点匹配的优化等在内的关键问题展开研究。从而为进一步地推动我国相关元件的制造及应用提供技术基础。

中文关键词： 自由曲面；绝对面形测量；相位偏折术；虚拟双目；双棱镜

英文摘要： Optical elements with free-form surfaces are able to achieve the compactness and the high transmittance of a optical system while having effectively corrected the system aberration. Hence there is a very important significance to apply these elements into the design and implementation of photoelectric systems. Processing and testing are two important and inseparable parts of the manufacture of optical elements. Furthermore, processing results often directly depend on the level of testing accuracy. At present, it is still lack of an absolute-shape measurement technology being able to accomplish a on-site testing with a large dynamic range, high-precision and high-performance under a simple system structure in the manufacture of (transparent) optical elements with free-form surfaces. For these requirements, an absolute-shape on-site measurement technique with a virtual-stereo phase deflectometry for the elements is proposed in this proposal. It is based on phase deflectometry, stereo vision and virtual imaging technologies. Investigation of several key issues, including system modeling and full-chain simulating, flexible system calibration with a global optimization, error correction for absolute-phase retrieval, optimization for point-matching of virtual-stereo,etc., are also carried out. A technical basis is acc

英文关键词： Free-form surface；Absolute surface shape testing；Phase deflectometry；Virtual-stereo；Biprism