英国QinetiQ公司的高性能热成像技术

英国的QinetiQ公司在发展热成像探测器和摄像机方面已经有很长的历史了。英国的通用组件SPRITE探测器(一种8元光导器件)、低成本热释电光导摄像管以及高性能STAIRS C摄像机(一种扫描型一维光伏元件列阵),都是以QinetiQ公司的技术为基础的。其中,SPRITE     

光的衰减对横向和纵向响应率与探测率方程中量子效率的影响

文章指出,当考虑入射辐射在光导探测器中产生衰减时,须对适用于响应率和探测率方程中的量子效率表达式进行修正。给出的量子效率新表达式可用于横向和纵向光导探测器的响应率与背景限探测率。     

叠盖电极技术在SPRITE 探测器上的应用

文中主要介绍了叠盖电极技术在SPRITE 探测器上的实际应用,并给出了具体实验结 果。选择适当的叠盖电极尺寸可以使SPRITE 的响应率Rv 提高一倍以上,探测率D3 普遍提高30 %左右,高的可达80 %。实验结果表明,叠盖电极技术明显地提高了SPRITE 器件的性能,是一种简便的提高SPRITE 性能的新途径。     

室温长波光导探测器研究

从理论和实验上详细研究了室温长波HgCdTe光导探测器,提出了室温光导半导体的广义优值,计算了10.6μm HgCdTe探测器的优值和极限性能与组分和掺杂的关系。用HgCdTe外延层制作了光导探测器,描述了它的性能。结果表明10.6μm室温光导探测器的最佳探测率可高于1×10~8cmHz~(1/2)/W,已接近一般的热敏型探测器性能。     

叠盖电极技术在SPRITE 探测器上的应用

文中主要介绍了叠盖电极技术在SPRITE探测器上的实际应用，并给出了具体实验结果。选择适当的叠盖电极尺寸可以使SPRITE的响应率Rυ提高一倍以上，探测率D^*普遍提高30％左右，高的可达80％。实验结果表明，叠盖电极技术明显地提高了SPRITE器件的性能，是一种简便的提高SPRITE性能的新途径。     

室温长波光导探测器研究

从理论和实验上详细研究了室温长波HgCdTe光导探测器，提出了室温光导半导体的议优值，计算了10．6μmHgCdTe探测器的优值和极限性能与组分和掺杂的关系。用HgCdTe外延层制作了光导探测器，描述了它的性能。结果表明 10．6μm室温光导探测器的最佳探测率可高于1×10^8chHz1/2/W，已接近一般的热敏型探测器性能。     

《SPRITE红外探测器及其应用译文集》简介

《SPRITE红外探测器及其应用译文集》由中国兵器工业第211研究所根据搜集的国外最新文献资料组织翻译而成,计有SPRITE探测器论文、专利、技术报告等30余篇,内容包括SPRITE器件的机理、设计、制造工艺及系统应用。 SPRITE(Signal Processing in the Element)器件是一种新型的碲镉汞光电探测器。它与传统的探测器件不同,这种器件能在器件内部同时完成探测和时间延迟与积分两项功能,因而在简化电子学电路的复杂结构、简化探测器制造工艺、减小体积、降低成本诸方面均显示出独特的优越性。采用SPRITE器件的红外成像系统已在工业、农业、军事等领域获     

偏压等参数对光导PbS焦平面探测器性能的影响

光导焦平面探测器的性能同其偏压及读出电路的工作参数密切相关。本文研究了采用CTIA型读出电路的1×128线列光导PbS焦平面探测器工作时,探测器偏压、积分时间和读出电路偏置电压对探测器信号、噪声及探测率的影响。实验结果表明:探测器信号、噪声及探测率均随探测器偏压增长而增加,存在一个最佳偏压3 V,使得探测器探测率达到最大;当超过此偏压后,信号电压增量减小,噪声电压增量增加;存在一个最佳积分时间50 μs,此时探测器探测率达到最大;存在一个可使用的读出电路偏置电压范围3.35~3.85 V,在此范围内,信号     

国外资料索引

红外技术 4001 光伏和光导红外探测器 Photovoltaic and photoconductive ir detectois, D Long, Opt. and infrared detector, 1977, 101-48. 讨论直接的光子探测、光电流、增益、响应率、噪声、探测率等基本参数,然后分别介绍光伏、本征光导、非本征光导探测器的理论和材料工艺。附参考文献70条,图15幅,本文为光学和红外探测器一书的第四章。     

低温背景限红外探测器

根据简并理论分析了光导红外探测器的噪声机制和背景辐射对探测器的探测率Ｄ的影响,从而提出了全新低温背景限探测率红外探测器结构,其Ｄ值有较大地提高。     

HgCdTe光导及扫积型器件的瞬态响应

从理论和实验上分析了HgCdTe光导(PC)及扫积型(SPRITE)器件的瞬态衰退过程,结果表明在高偏置电场下,光导器件的衰退过程近似线性,扫积型器件的衰退过程近似矩形.由衰退过程曲线可以确定过剩载流子的双极迁移率.     

Integrated PbS-Si IR detector read-out

A novel technique for direct integration of PbS-Si heterojunction IR detectors and read-out circuitry using planar Si technology has been developed and implemented. X-Y address read-out mode of a detector array has been demonstrated. Injection efficiency of close to unity has been obtained under optimum bias condition at room temperature.     

昆明物理研究所HgCdTe光导探测器的现状及发展

“七五”,“八五”期间,昆明物理研究所成功地研制和发展了ＨｇＣｄＴｅＳＰＲＩＴＥ探测器组件和多元短线列光导ＨｇＣｄＴｅ探测器组件,本文简要报道这两种探测器组件的现状和今后的发展。     

光学投影系统对SPRITE探测器MTF测试的影响

ＳＰＲＩＴＥ探测器是一种三引极ｎ型的ＨｇＣｄＴｅ光电导探测器,具有焦平面上的时间延迟积分（ＴＤＩ）功能,用于串扫和串并扫热成像系统。用建立在线性滤波理论基础上的调制传递函数（ＭＴＦ）评价、测试ＳＰＲＩＴＥ探测器的空间分辨能力,已有不少研究论文报道,但都忽略了测试用光学投影系系统对探测器ＭＴＦ测试的影响。除了光学镜头的传递特性外,光学投影系统中所特有的扫描部件的运动效应也较大程度上影响着探测器ＭＴＦ     

楔条形阳极紫外探测器综述

基于楔条形阳极的紫外探测器能够探测到极微弱光情况下的单光子信息,并能够依靠电子读出系统实现探测目标的二维成像.本文介绍了楔条形阳极紫外探测器的发展,阐述了这类探测器工作原理,详细分析了探测系统的具体构成,最后总结了它的性能和应用前景.     

Full Schottky high density 2-D infrared charge coupled detector array

Conventional silicon based infrared (IR) detector arrays consist of separate Schottky barrier detectors connected via transfer gates to MOS type charge coupled device (CCD) read-out shift registers. A novel IR imaging array is described where Scottky silicide elements are used exclusively both as IR detectors as well as the silicide gates of Schottky CCD read-out shift registers. Advantages of the novel structure are a high packing density of IR detectors with high fill factor, simplicity of the device layout and possible high fabrication yield.     

非均匀性校正的长波光导探测器读出电路设计

在航天遥感领域,波长在10m以上的长波探测器仍以HgCdTe光导型探测器为主,在红外探测成像方面发挥着重要作用。非均匀性是目前长波光导探测器突出的问题之一,设计了一种数模混合的非均匀性校正的长波光导探测器读出电路。该电路不仅可以有效地解决线列长波光导探测器电阻非均匀性问题,还可以增大ROIC输出信号的动态范围,几乎不增加读出电路功耗。经过仿真测试表明:非均匀性问题有了明显的改善,能够使其非均匀性降为0.5%以内,在常温和低温下都能正常工作。该校正电路不仅能解决当前工程中的关键问题,还对今后高性能大面阵长波光导探测器读出电路的设计具有重要的指导意义。     

The design of an animal PET: flexible geometry for achievingoptimal spatial resolution or high sensitivity

Presents the design of a positron emission tomograph (PET) with flexible geometry dedicated to in vivo studies of small animals (TierPET). The scanner uses two pairs of detectors. Each detector consists of 400 small individual yttrium aluminum perovskite (YAP) scintillator crystals of dimensions 2×2×15 mm³, optically isolated and glued together, which are coupled to position-sensitive photomultiplier tubes (PSPMTs). The detector modules can be moved in a radial direction so that the detector-to-detector spacing can be varied. Special hardware has been built for coincidence detection, position detection, and real-time data acquisition, which is performed by a PC. The single-event data are transferred to workstations where the radioactivity distribution is reconstructed. The dimensions of the crystals and the detector layout are the result of extensive simulations which are described in this report, taking into account sensitivity, spatial resolution and additional parameters like parallax error or scatter effects. For the three-dimensional (3-D) reconstruction a genuine 3-D expectation-maximization (EM)-algorithm which can include the characteristics of the detector system has been implemented. The reconstruction software is flexible and matches the different detector configurations. The main advantage of the proposed animal PET scanner is its high flexibility, allowing the realization of various detector-system configurations. By changing the detector-to-detector spacing, the system is capable of either providing good spatial resolution or high sensitivity for dynamic studies of pharmacokinetics     

Electrode Design of Cylindrical Coplanar——grid CdZnTe Detector by Finite Element Methods

Cylindrical coplanar-grid configurations, which offer a lot of advantages over established designs,can effectively overcome the problem of poor hole collection. Finite element analysis is utilized for simulating the potential distribution of the cylindrical coplanar-grid detector under different models by varying the widths of grid and pitch of electrodes. In addition, a modified grid pattern has been discussed to improve the weighting potential match between two grids. In this way, the geometry of electrodes for cylindrical coplanar-grid detectors is optimized.