含有谐衍射面的单片式胶囊内窥镜光学设计  

Optical Design of the Single-Chip Capsule Endoscopt with Harmonic Diffraction Surface

作　　者：王军华[1] 卢景红[1] 徐敏[1] 

机构地区：[1]复旦大学光科学与工程系超精密光学制造工程研究中心,上海200433

出　　处：《激光与光电子学进展》2012年第12期149-154,共6页Laser & Optoelectronics Progress

基　　金：国家科技重大专项(2011ZX02402);上海市引进技术的吸收与创新项目(2010CH-007)资助课题

摘　　要：介绍了含有谐衍射面的单片式胶囊内窥镜的设计方法。系统工作波段为0.486～0.656μm,视场角为116.2°,光学系统总长为2.4mm。另外,设计了含有3个球面透镜的胶囊内窥镜和含有非球面的单片式胶囊内窥镜,并和含有谐衍射面的单片式胶囊内窥镜进行了比较。结果表明,含有谐衍射面的单片式胶囊内窥镜可以达到含有3个球面透镜的胶囊内窥镜的成像质量,外形结构和含有非球面的单片式胶囊内窥镜一样简单。系统在频率40lp/mm处的调制传递函数大于0.6。A design method of the single-chip capsule endoscope with harmonic diffraction surface is introduced with the system working band of 0. 486-0. 656 μm and the field-of-view angle of 116.2°. And the total length of the optical system is 2.4 ram. Additionally, a capsule endoscope with three spherical lenses and a single-chip capsule endoscope with aspherica[ surface are designed, and a comparison is made between them and the single-chip capsule endoscope with harmonic diffraction surface. It is found that the single-chip capsule endoscope with harmonic diffraction surface can achieve the image quality of the capsule endoscope with three spherical lenses, and its construction is as simple as the single-chip capsule endoscope with aspherical surface. Its modulation transfer function is greater than 0.6 at the frequencv of 40 ln/mm.

关 键 词：光学设计 胶囊内窥镜 谐衍射 衍射光学元件 单点金刚石车削 

分 类 号：O435.2[机械工程—光学工程]