摘要
为了满足现代医疗领域中对内窥镜小型化、大视场的需求,采用反远距光学结构作为初始结构,利用Zemax光学设计软件在原有结构中加入5×5微透镜阵列,得到了一种工作于可见光波段、全视场为110°、焦距为1.55mm、F数为4.2、最大通光口径为3.15mm、系统总长为7.99mm的高清电子内窥镜物镜光学系统。该系统由6片透镜组成,以光阑面为界分为前组和后组,其中前组包括一片前后两面均为阵列面的镜片,后组包含一组双胶合透镜。整个系统的光学调制传递函数在120lp/mm处达到0.36,接近衍射极限,满足医疗使用的要求。设计结果表明,微透镜阵列在不改变口径的条件下对增大内窥镜光学系统视场有明显优势,在医疗领域具有广阔的应用前景。
In order to meet the needs of miniaturization and large field-of-view（FOV）of endoscopes in modern medical field,by using the retrofocus optical structure as initial structure,a high definition electronic endoscope objective optical system with 5×5 microlens array in the visible spectrum designed by Zemax software is presented.The optical system has a FOV of 110°,a focal length of 1.55 mm,F number of 4.2,a maxium clear aperture of3.15 mm and a total length of system of 7.99 mm.The optical system is composed of 6 pieces of lens,which are divided into the front lens group and the rear lens group.The front lens group includes one lens with two-array surfaces.The rear lens group includes one double cemented lens.The modulation transfer function value of the whole system is 0.36 at the spatial frequency of 120 lp/mm,which is approaching to the diffraction limit,and meets the use of medical treatment.The design results show that the microlens array has obvious advantages in increasing the field of view of the endoscopic optical system without changing the aperture,and has a wide application prospect in medical treatment.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第2期313-318,共6页
Acta Optica Sinica
基金
吉林省自然科学基金(20150101062JC)
关键词
光学设计
内窥镜光学系统
微透镜阵列
大视场
optical design
endoscope optical system
microlens array
large field-of-view
