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.
出处
《激光与光电子学进展》
CSCD
北大核心
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
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
optical design
capsule endoscope
harmonic diffraction
diffractive optical element
single-pointdiamond turning
