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.     

高清医用电子内窥镜微型CMOS摄像模组(英文)

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1280×1024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15.0mm、5.5mm、5.2mm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136lp.mm-1,图像传输距离达到2m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.     

Noise minimization via deep submicron system-on-chip integration in megapixel CMOS imaging sensors

Infrared sensor designers have long maximized S/N ratio by employing pixel-based amplification in conjunction with supplemental noise suppression. Instead, we suppress photodiode noise using novel SoC implementation with simple three transistor pixel; supporting SoC components include a feedback amplifier having elements distributed amongst the pixel and column buffer, a tapered reset clock waveform, and reset timing generator. The tapered reset method does not swell pixel area, compel processing of the correlated reset and signal values, or require additional memory. Integrated in a 2.1 M pixel imager developed for generating high definition television, random noise is ∼8e-at video rates to 225 MHz. Random noise of ∼30e-would otherwise he predicted for the 5 μm 5 μm pixels having 5.5 fF detector capacitance with negligible image lag. Minimum sensor S/N ratio is 52 dB with 1920 by 1080 progressive readout at 60 Hz, 72 Hz and 90 Hz. Fixed pattern noise is <2 DN via on-chip signal processing. The paper presented there appears in Infrared Photoelectronics, edited by Antoni Rogalski, Eustace L. Dereniak, Fiodor F. Sizov, Proc. SPIE Vol. 5957, 595701 (2005).     

2 × Zoom Ratio Telecentric Projector Lens Design for 1080 P High Definition Television with Minimum 8000 K Color Temperature

In today's digital age, digital projectors and their application are gaining in significance, especially in the home theater area where the projected area is more than hundred inches. More attention has to be paid to the design of these than of ordinary data projectors due to the enhancement of both definition and contrast for home theater projectors. This complicates the optical design of the projector, especially in 1080 P flat plane panel resolution requirements with strong offset of 130%, whose semi-image height (18.6 mm) is very close to that of 35 mm film (20 to 21 mm). In this paper the lens design samples focus on the application of a projector with a 1080 P digital micromirror device (DMD) system with 10.68 μm per pitch. Such lenses have the telecentric design on the image side because of the total internal reflection (TIR) prism. The complicated design is the reason for this: firstly, there must be a very long back focal length due to the huge TIR prism and zoom mechanical system; secondly, there is an extremely relative luminance requirement (70% minimum) at semi-image height (18.6 mm); thirdly, there are difficulties in the elimination of lateral aberration due to the limited choice of glass and, fourthly, there is a 2 × zoom ratio with modulation transfer function requirement of 40% at 501p/mm at a semi-image height of 18.6 mm minimum and, most important, limited total overall length. The lens design with 2 × zoom ratio for 1080 P resolution was presented with great success; the optimal calculation of lateral chromatic aberration via genetic algorithm (GA) was introduced in this research and then a local minimum of lateral color aberration was identified.     

高清图像跟踪系统设计

高清图像跟踪系统是一种可以实时显示运动目标、并对目标进行跟踪的高新技术设备。HDMI是Silicon Image等八家公司推出的针对高清电视机终端的开放式高清晰度多媒体接口,它采用一种独特的TMDS编码机制,具备在单一线缆上同时传输音视频数据的能力。基于高清电视的图像跟踪系统,充分利用其高分辨率特性,既可以实现运动目标地精确跟踪,又可以实时高速地显示图像。HDMI体系结构紧凑,使得图像跟踪系统更小巧轻便。     

高清晰度电视

介绍全数字高清晰度电视区别于模拟高清晰度电视的关键技术，国际上力国统一高清晰度电视标准的状况及我国关于高清晰度电视的研究情况。     

一种YAG投影管及投影响显示系统

 介绍了研制成功的YAG投影管及投影显示系统。在阴极电流为5mA时,绿色投影管亮度大于6.5×10⁵cd/cm², 束斑直径在束流为1mA时小于80 μm。在122cm背投影机中可重现高质时图象,其水平分辨率为1000TVL,峰值亮度为1500×10⁵cd/cm²,对比度达成100。