摘要
设计了一款用于医疗方面的视场为74°的电子内镜物镜.电子内镜外径为8mm从而实现无麻醉,内镜前端可弯曲来实现无盲区检测.物镜有效焦距为4mm,后工作距为4.8mm.系统的畸变最大值少于4%,场曲最大值为0.27mm.为了提高成像质量,将非球面引入此五片镜系统.所设计的光学系统尤其适用于0.25英寸CCD像传感器,且显示模式为SVGA.
An electronic endoscope objective lens with a field-of-view of 74° was designed for medical application. The electronic endoscope is with an outside diameter of 8 mm that makes the anaesthesia avoidable, and a flexible head that realizes non-blind spot diagnosis. The effective focus length of the objective is 4 mm while the back working length is 4.8 ram. The maximum distortion of the system is less than4% and the maximum field curvature is0.27 mm. In order to improve the imaging performance, the aspheric surface into the system of 5 elements was introduced. The designed optical system especially matches the requirements of a CCD detector with 0.25 inches and SVGA display model.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2008年第2期328-331,共4页
Acta Photonica Sinica
基金
Supported by the Key Research Foundation of Scientific and Technical Committee of Tianjin(06YFSZSF00600)
关键词
光学设计
反摄远镜头
电子内窥镜
物镜系统
非球面
Lens design
Inverse telephoto lens
Electronic endoscope
Objective lens
Aspheric surface
