检索结果-内蒙古大学图书馆

development OF CDZNTE ENERGY SELECTIVE arrays FOR INDUSTRIAL AND MEDICAL RADIATION IMAGING

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT 1994年第1-3期353卷 349-355页

作者： POLICHAR, R SCHIRATO, R REED, J Science Applications International Corporation 4161 Campus Point Court San Diego CA 92121 USA

Recent advances in the production of CdZnTe using the high pressure Bridgman growth process now make it possible to design and fabricate complex X-ray sensor arrays on large monolithic substrates. These solid state ionization devices have the advantages of improved spatial and energy resolution, and produce significantly higher signals than competitive scintillator-photodiode systems. We have fabricated a number of linear and areal monolithic arrays in our laboratory using vacuum deposited contacts on such material with good success. These arrays operate in a pulse counting mode using hybrid and surface mount circuitry mounted in close proximity to the arrays. Linear devices with pitches of less than 0.8 mm and with 32 elements per substrate have been used for very wide dynamic range radioscopy with excellent results. Images are presented which demonstrate dynamic range in excess of 500:1 and Nyquist limited resolution at diagnostic X-ray energies for a wide variety of samples. Preliminary results demonstrate that the arrays can be used for energy selective radioscopy permitting the identification of differing materials within the image by approximate atomic number. Systems using areal arrays also have been evaluated as radiation cameras and demonstrate good spatial and energy resolution. Examples of data taken with a pin-hole collimator show the ability to distinguish source distributions by energy as well as location and intensity. Ongoing work in the improvement of spatial and energy resolution and the fabrication of larger arrays is discussed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

High-frame-rate intensified fast optically shuttered TV cameras with selected imaging applications

High-frame-rate intensified fast optically shuttered TV came...

引用

Ultrahigh- and High-Speed Photography, Videography, and Photonics '94

作者： Yates, George J. King, Nicholas S. Los Alamos Natl. Lab. Los Alamos NM United States

ISBN: (纸本)0819415979

This paper focuses on high speed electronic/electro-optic camera development by the Applied Physics Experiments and Imaging Measurements Group (P-15) of Los Alamos National Laboratory's Physics Division over the last two decades. The evolution of TV and image intensifier sensors and fast readout fast shuttered cameras are discussed. Their use in nuclear, military, and medical imaging applications are presented. Several salient characteristics and anomalies associated with single-pulse and high repetition rate performance of the cameras/sensors are included from earlier studies to emphasize their effects on radiometric accuracy of electronic framing cameras. The Group's test and evaluation capabilities for characterization of imaging type electro-optic sensors and sensor components including Focal Plane arrays, gated Image Intensifiers, microchannel plates, and phosphors are discussed. Two new unique facilities, the High Speed solid state Imager Test Station and the Electron Gun Vacuum Test Chamber are described. A summary of the Group's current and developmental camera designs and R&D initiatives are included.

关键词： Television equipment

来源：评论

学校读者我要写书评

暂无评论

Automated diagnosis for the time of flight scintillation array: development of a structural and behavioral reasoning system

Automated diagnosis for the time of flight scintillation arr...

引用

Conference on Artificial Intelligence for applications

作者： R.K. Paasch A.M. Agogino Department of Mechanical Engineering Oregon State University Corvallis OR USA Department of Mechanical Engineering University of California Berkeley CA USA

The development and implementation are described of the time of flight validation system, a system for the automated diagnosis of a large-scale nuclear physics detector. The diagnostic system is multi-leveled, combining a single monitoring level based on statistical methods with two model-based diagnostic levels, one operating on structural information and the other using both structural and behavioral models. The later diagnostic level uses a qualitative data model of the detector to provide evidence that is mapped on a continuous basis from observation values to belief in component failure hypotheses. The general architecture is scalable.< >

关键词： Large-scale systems Nuclear physics solid scintillation detectors Radiation detectors Mechanical engineering Real time systems Computerized monitoring Laboratories sensor arrays Statistical analysis

来源：评论

学校读者我要写书评

暂无评论

High resolution linear arrays

High resolution linear arrays

引用

solid-state Imagers and Their applications 1985

作者： Bosiers, Jan Vermeiren, Jan Sevenhans, Jan Interuniversity Microelectronics Center kapeldreef 75 LeuvenB3050 Belgium Sachs-Freeman Associates Inc BowieMD20715 United States

This paper describes the methodology, which is used in IMEC for the realization of very high resolution linear image sensors. The key elements in design and processing are the use of the DEPLI-sensor principle, a quadrilinear read-out approach and the use of p-p+ epimaterial. The feasibility of these principles are demonstrated on devices with a pitch of 8,6,5 and 4 urn and with a number of pixels ranging from BOO to 4096. A standard triple poly, buried channel process is used for the fabrication of the devices. A charge transfer inefficiency of better than 1.E-5 is measured and a data rate of over 5 MHz can be achieved. The dark current is less than 2 nA/cm2, the responsivity equals 0.36 A/W at 700 nm wavelength and the non-uniformity is less than ± 5 % for all sensor types. © 1986 SPIE. All rights reserved.

关键词： Charge transfer

来源：评论

学校读者我要写书评

暂无评论

solid-state Imaging arrays

Solid-State Imaging Arrays

引用

solid-state Imaging arrays 1985

The proceedings contain 24 papers. The topics discussed include: the solid state image sensor's contribution to the development of silicon technology;CCD charge collection efficiency and the photon transfer technique;high density frame transfer image sensors with vertical anti-blooming;advances in CCD technology;digital charge coupled device (CCD) camera system architecture;backside charging of the CCD;large area CCD image sensors for scientific applications;enhancement of x-ray performance with new GEC charged coupled devices (CCD);simplified technique of hologram generation and transmission;and performance analysis of the photon-counting image acquisition system.

关键词：

来源：评论

学校读者我要写书评

暂无评论

solid-state aspect sensor

Solid-state aspect sensor

引用

Shuttle Pointing of Electro-Optical Experiments 1980

作者： Cassidy, L. Kaplan, L. Perkin-Elmer Corporation Optical Technology Division DanburyCT06810 United States

Programs in development for the near future will require pointing sensors with accuracies in the region of 1 arc-sec and sub-arc-sec stability. The Advanced X-Ray Astronomical Facility, Annular Suspension Pointing System, Shuttle Infra-Red Telescope Facility and Stereosat are representatives of these programs. This paper describes a solid state Aspect sensor which could support this pointing capability and the testing technology necessary to verify its performance. The sensor uses a Charge Coupled Device (CCD) array integrated with a high-performance optical assembly. Perkin-Elmer has developed in-house a solid state sensor which could be used for precision pointing and attitude estimation applications. A test facility has been established which can be used to evaluate CCD arrays and optical assemblies for their suitability and use in a star sensor. The detail design of a stellar sensor to meet 1 arc-sec pointing requirements is presented. Optical performance characteristics are discussed, as is the verification testing of a prototype optical assembly. Test data are provided. The optical assembly is a 253-mm focal length, F/l.5 catadioptric lens system. Discussion of the solid state focal plane includes focal plane requirements and centroiding algorithms, focal plane and CCD test facilities, representative test data from linear CCD arrays, and a candidate CCD array for this application. An integrated sensor test station is described. Important considerations in the development of this precision pointing sensor are also presented, along with the predicted sensor performance based upon computer simulations. © 1981 SPIE. All rights reserved.

关键词： Focusing

来源：评论

学校读者我要写书评

暂无评论

MOS AREA sensor .2. LOW-NOISE MOS AREA sensor WITH ANTIBLOOMING PHOTO-DIODES

引用

IEEE JOURNAL OF solid-state CIRCUITS 1980年第4期15卷 747-752页

作者： OHBA, S NAKAI, M ANDO, H HANAMURA, S SHIMADA, S SATOH, K TAKAHASHI, K KUBO, M FUJITA, T HITACHI LTD MUSASHI WORKSKOKUBUNJITOKYO 185JAPAN HITACHI LTD MOBARA WORKSCHIBAJAPAN

The development of a high-sensitivity 320 X 244 element MOS area sensor and a novel fixed pattern noise (FPN) suppressing circuit are reported in this paper. The new device incorporates p/sup +/-n/sup +/ high-C photodiodes and double-diffused sense lines. The p/sup +/-n/sup +/ high-C photodiodes provide a large dynamic range and a large saturation signat of 1.4 /spl mu/A with 6-1x W-lamp illumination. The double-diffused sense lines are introduced to vastly improve blooming characteristics, making use of a built-in potential barrier. FPN is proved to stem mainly from inversion charge variations through horizontal switching MOS gate capacitances. A simple high-performance FPN suppressing circuit is proposed which realizes high signal-to-noise (S/N) ratios of more than 68 dB at saturation. The new sensor is tested in a high-sensitivity black-and-white VTR hand-held camera and will find broad applications.

关键词： Photodiodes sensor phenomena and characterization Video recording Cameras sensor arrays Dynamic range Capacitance Circuit testing Image sensors MOSFETs

来源：评论

学校读者我要写书评

暂无评论

A high resolution solid state Charge Coupled Device (CCD) space borne earth imager

A high resolution solid state Charge Coupled Device (CCD) sp...

引用

applications of Electronic Imaging Systems 1978

作者： Hirschberg, Irving Imaging Systems Division Fairchild Camera and Instrument Corp. SyossetNY11791 United States

A solid state (Charge Coupled Device) imaging system is described which satisfies the requirement for multispectral, high resolution, real time imagery. The system, using an earth resources survey satellite as its platform is configured to yield a 10 meter ground resolution with a 50 kilometer swath width at approximately 1000 km altitude. Four spectral bands ranging from 0.5 to 1.1 μm have been selected and are implemented by optically butting three 1728 pixel linear arrays (5184 pixel per band) on appropriate beam splitting prisms. The device employed, the Fairchild CCD 121H, shown in Figure 1, is a monolithic self-scanned image sensor utilizing two phase, buried n-channel CCD technology. The device has an element-to-element pitch of 13 μm (approximately 2000 pixel/inch) and has been demonstrated to have a wide dynamic range (2500:1), Figure 2, low noise equivalent exposure and dimensionally precise photosite spacing. Consideration of focal plane design, geometric accuracy, image registration, temperature control, optical design, and noise figures are discussed. Particular emphasis has been placed on the unique properties of CCD detectors which allow for specialized post processing of the video for dealing with low contract scenarios. The paper concludes with new trends in specialized time delay and integration (TDI) mode imaging systems now under study and development at Fairchild. © 1978 SPIE. All rights reserved.

关键词： Charge coupled devices

来源：评论

学校读者我要写书评

暂无评论

solid state IMAGE SENSING: A NEW AND VERSATILE TOOL FOR SCIENCE AND INDUSTRY.

引用

1974年 716-721页

作者： Weckler, Gene P.

Recent developments pertaining to solid state image sensors are reviewed. Advances in signal processing are discussed and characteristics and performance of typical sensor arrays are presented. New and novel applications ranging from scientific instruments to non-contact measurements for industrial process control. The basic device consists of a silicon chip containing a row of photodiodes and a parallel shift register. Connected to each stage of the shift register is the gate of an MOS switch which couples the adjacent photodiode to a common video line. Both linear and area arrays have emerged from the development stage. New and novel applications ranging from scientific instruments to non-contact measurements for industrial process control are described and illustrated.

关键词： SEMICONDUCTOR DIODES, PHOTODIODE

来源：评论

学校读者我要写书评

暂无评论

solid state IMAGE SENSING: A NEW AND VERSATILE TOOL FOR SCIENCE AND INDUSTRY.

SOLID STATE IMAGE SENSING: A NEW AND VERSATILE TOOL FOR SCIE...

引用

Asilomar Conf on Circuits, Syst, and Comput, 7th, Annu, Conf Rec, Pap

作者： Weckler, Gene P.

关键词： Semiconductor diodes, Photodiode

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：