高灵敏度热释电摄象管红外电视系统

针对热释电摄象管(PEV)在传统的对称斩波模式下存在的各种问题,设计了一种新的非对称斩波模式PEV红外电视系统.通过提高PEV摄象机的温度响应率R_i和采用高去噪声信号处理系统,大大改善了PEV红外成象系统的性能.     

热释电摄象管的调制特性

本文说明热释电摄象管的调制特性及性能参数,并把描述单元靶面的热释电摄象管的一些公式尽量规一。通过选取各种参数所作的计算,为设计与讨论热释电摄象管的性能提供了方便。     

RDS-406型红外热释电摄象管

由昆明物理研究所研制的RDS-406型红外热释电摄象管,为充气型热释电摄象管,是一种不需致冷的红外成象器件,能与工业电视摄象机配套使用。摄象管采用锗平板作输入窗口,TGS热释电晶体作灵敏靶完成光电转换。靶面直径18mm,工作     

铁电晶体热释电性研究

以发表在国内外学术刊物上的论文为线索,回顾本所十年来研究铁电晶体热释电性及其红外应用过程中取得的结果和进展。主要内容包括:用掺杂消旋丙氨酸的TGS晶体制成的热释电红外探测器,其性能已达到掺杂左旋丙氨酸TGS晶体的水平;铁电晶体过剩荷电粒子横向表面电导对热释电性能的影响;用粉纹图法观察TGS晶体的静态电畴结构,以及用热释电摄象管中的TGS靶观察动态电畴结构。     

一种网状刻蚀铝掩膜层的制备

热释电摄象管(PEV)之所以受到注意,是由于它是比较便宜、具有中等性能的红外(8～14μm)成象器件。象任何一种成象器件那样,在热释电摄象管中,决定性能的参数是灵敏度、噪声和分辨率。非网状靶面热释电摄象管的分辨率受到两个方面的限制:电子束放电滞后和靶面的横向热扩散。电子束放电滞后的结果使信号不能完全读出。若以平移模式工作,在高空间频率下,这就会引起信息的损失。另一方面,在高空间频率下,由于热象区到冷象区的热扩     

PEV热象测试仪的数据处理方法及系统

本文针对热释电摄象管(PEV)成象系统的特点,提出了数字式红外图象的数据处理的原理与方法。设计了红外图象数据处理系统及软件包,并给出了对红外图象的测试和处理实例。     

热释电器件的应用

本文先简短地评述了热释电器件(包括热释电摄象管)的特点,然后讨论了热释电器件的主要用途。从气象卫星和星际探测器上应用的高级辐射计,直到商业和工业上广泛应用的简单热传感器,都要用到热释电器件。此外,热释电器件对于绝对辐射测量、红外光谱学以及激光研究,都起到重要的作用。现在,热释电摄象管除了用于简单的热成象系统之外,在激光干涉仪中以及其它需要两维探测器的场合,用途也很广。最后,本文讨论了将来发展两维热释电/CCD列阵的可能性。     

Bb红外热成像

Bb1 红外测温热电视系统黄铁侠(华中工学院无线电系)红外热电视是采用热释电摄象管的红外成象设备。本文介绍的这种设备,具有温度测量的功能。它可用来显示各种热能设备和电气设备的热图象,测定温度分布情况,并可计算某些设备的热耗(kcal/h),为采取节能措施提供依据。热释电摄象管是电子束器件,它存在黑斑效应(本底电流不均匀),温度响应率(灵敏度)不均匀及本底电流不够稳定等缺点,这给温度     

红外摄象管靶及其制造方法

一、内容1.用红外热电材料做成一面有镶嵌状凹凸形,另一面为平面,至少在一个面上形成导电层的红外摄象管靶。2.用热释电材料做成一面有镶嵌状凹凸形,另一面为平面,在平面表面形成导电层的红外摄象管靶。3.为了做成一面有间隙的网格,利用与间隙网格形成一体的红外光电材料,蚀去间隙网格形成凹凸面,其背面为平面,至少在一面上形成导电层,具有这种特征的红外摄象管靶及其制造方法。     

红外热释电成象仪

一、热释电摄象管的结构及工作原理红外热释电系统,主要由调制器、光学元件、热释电摄象管及线路等几部分组成,其中每一部分,都直接影响到成象质量的优劣。然而对成象质量影响最关键的部分,是热释电成象管,及其对前放的要求。我们的工作是在SGB-6型工业电视的基础上进行的,主要是把这种工业电视改装成为热释电成象系统。由于热释电探测器是一个高输出阻抗、低噪声电流输出型的红外器件,能在红外较宽的光谱波段与景物交流祸合成象,并不需要致冷设备。其特点是输出电流很微弱,只有10~(-9)～10(-10)安培数量级,大约比光导管产生的电流低100倍。这个指标就足以表明了对     

Thermal imaging with pyroelectric vidicons

The performance of a pyroelectric vidicon operating in either a panning or chopping mode is discussed. Some constraints on vidicon applications imposed by the nature of pyroelectricity are explored. Several means for advancement of pyroelectric vidicon technology are described. Finally, the projected performance of pyroelectric vidicons that incorporate these advances is discussed along with the performance of existing pyroelectric vidicons.     

Submillimeter imaging with a pyroelectric TV camera

The use of a TV camera with a standard pyroelectric tube for imaging continuous submillimeter (submm) waves is described. The spectral sensitivity of such pyroelectric vidicon has been measured. The results of experiments on diffraction and interference using submm laser radiation are presented. For the first time, submm images of different objects have been obtained with the aid of a pyroelectric vidicon. It has been shown that a pyroelectric TV camera can be effectively employed in various laser studies as well as in submm imagery technique.     

热释电摄像管本底补偿技术

介绍了热释电红外摄像管（ＰＥＶ）的本底补偿技术，给出了电路试验的结果，并对现有进一步改进提出了设想。     

Infrared television: performance of pyroelectric vidicon at 8 to 14 ?m

The performance of a television camera using the 2.54cm pyroelectric vidicon has been measured and compared with an analysis that attempts to identify the factors limiting the performance of the system.     

Performance of the pyroelectric vidicon for thermal imaging in the 8—14 micron band

The performance of a television camera using the one-inch pyroelectric vidicon has been measured. The results are compared with an analysis which attempts to identify the factors limiting the performance of the system. Two modes of operation are considered; chopping the incident radiation with a shutter and panning the camera. The measurements indicate that the camera panning mode produces the better performance. At low spatial frequency a scene temperature difference of 0.2°C may be detected.     

Alternative pedestal generation scheme gives flickerfree pictures from a pyroelectric vidicon chopper camera

An alternative way of generating the pedestal current in a pyroelectric vidicon (p.e.v.) is described. The better uniformity of the pedestal current gives less flicker when the p.e.v. is used in the 25 Hz chopper mode. A more uniform tube response is expected, being useful when temperature measurements, based on the local video level, are made.     

Ramp mode operation of a pyroelectric vidicon

A new mode of operating a pyroelectric vidicon is demonstrated. It uses a linearly rising voltage ramp applied to the target connection to generate the positive bias across the target necessary for efficient tube operation. The theoretical relationship between lag (time response of the tube to a step impulse signal) and readout efficiency is examined. Lag measurements of a tube operating in ramp mode are used to find the readout efficiency under different operating conditions, and the importance of the beam energy spread of the electron gun in determining the operating efficiency is emphasized.     

Transient response of vidicon photoconductors

An expression for the rise and decay times of vidicon photocurrents as a function of incident illumination is derived for a certain class of vidicon photoconductors. The approach taken is semiempirical in that certain parameters in the derived expression are obtained directly from vidicon manufacturer's data sheets. Regults compare well with the manufacturer's published results.     

A color separating filter integrated vidicon for frequency multiplex system single pickup tube color television camera

A new vidicon with color separating stripe filter integrated faceplate was developed for frequency multiplex system using a single pickup tube color television camera. The distinctive features of the vidicon are 1) a faceplate with integrated color separating stripe filters, 2) an indium oxide transparent electrode, and 3) a set of spatial frequency limiting quartz filters which act as a limiter for spurious color signals. A color television camera using this vidicon provided satisfactory color pictures.     

An experimental crystalline-selenium vidicon

The use of polycrystalline Se as the photosensitive target of a vidicon image tube has been demonstrated for the first time. The mode of operation of this target layer is fundamentally different from that of the amorphous-Se vidicon target, which is commonly described as a photosensitive insulator layer. In contrast, the explanation for the crystalline-Se vidicon operation, as proposed here, is based on the utilization of a reverse-biased heterojunction contact between n-type SNO2and p-type crystalline Se. A fabrication process has been developed which yields target layers with an attractive combination of operating characteristics. This new type of vidicon has the following nominal operating parameters: dark current ≃ 5-10 nA, peak sensitivity ≃ 0.270 A/W, peak quantum efficiency ≃ 60 percent, and 50-ms lag ≃ 10 percent. Compared to the standard Sb2S3vidicon, this experimental crystalline-Se vidicon has more than twice the sensitivity and less than half as much lag and dark current.