高清医用电子内窥镜微型CMOS摄像模组

研发并报道一个全新的130万像素电子内窥镜微型摄像模组.该模组采用低压差分信号技术实现图像数据的长距离高保真传输,它包括一个1/5.5英寸、分辨率为1 280×1 024像素的CMOS图像传感器,一个视场角为140°的小型镜头以及2个电路板.小型镜头座直接粘合到图像传感器的非光学窗口部分,两块印刷电路板垂直装配,使模组的尺寸缩小到长宽高分别为15.0 mm、5.5 mm、5.2 mm的空间.编码芯片将并行数字信号编码成低压差分信号经双绞线传出模组.搭建了实验系统并对摄像模组的实践性能进行评价.实验表明:模组分辨率达到136 lp·mm-1,图像传输距离达到2 m以上.紧凑的结构、高清分辨率图像、大视场和长传输距离使其适用于内窥镜诊治,特别是高清胃镜和结肠镜.

High Resolution Miniaturized CMOS Camera Module for Medical Electronic Endoscope

 A novel miniaturized camera module with 1.3 megapixels for electronic endoscope is developed and presented.This module realizes long-distance and high-fidelity transmission of image data adopting Low-Voltage Differential Signaling technology.It includes a 1/5.5 inch CMOS image sensor with a resolution of 1 280×1 024 pixel2,a small integrated lens with field of view of 140° and two electric circuit boards.The lens fixed with inner screw thread is cemented directly onto the non-optical part of the image sensor′s surface.Two printed circuit boards are assembled vertically,which reduces the size of the module down to 5.5 mm in width,5.2 mm in height and 15.0 mm in length.The 10-bit parallel digital signals are encoded into low-voltage differential signals before they are output through a twisted pair.A demonstration system is developed to evaluate the performance of the camera module.Experimental results show that the module′s resolution reaches to 136 lp·mm-1,and the image transmission length is over 2 meters.The compact size,high resolution image,wide field of view and long-distance transmission enable the camera module to be used in video endoscopy,especially for HDTV gastroscopes and colonoscopes.