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检索条件"任意字段=Conference on Solid State Sensor Arrays and CCD Cameras"

共 195 条记录，以下是121-130 订阅

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SIOO2A: a three side buttable 2048 x 4096 ccd image sensor

SIOO2A: a three side buttable 2048 x 4096 CCD image sensor

引用

solid state sensor arrays and ccd cameras

作者： Blouke, Morley M. Dosluoglu, Taner German, Richard A. Elliott, S.T. Janesick, James R. Reed, Richard Stover, Richard J. Scientific Imaging Technologies Inc. Portland OR USA

This paper will describe in some detail a new large area ccd image sensor designed specifically to be used either as a single imager or assembled in large, tightly configured mosaics of ccds. The device has 2048 ×... 详细信息

ISBN: (纸本)081942028X

关键词： Charge coupled devices

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Megapixel resolution PC digital still camera

Megapixel resolution PC digital still camera

引用

solid state sensor arrays and ccd cameras

作者： Chan, Wen-Hsin Chou, Chi-Fu Industrial Technology Research Inst. Chutung Hsinchu Taiwan

ISBN: (纸本)081942028X

A PC digital still camera based on a mega-pixel ccd area array is presented. This camera can be used as an image input device in the applications of multimedia. The system is equipped with a conventional camera lens, and an 1.5 mega-pixel progressive color ccd area array. A driving circuit is designed to control the focusing and the iris of the lens in order to perform auto/manual focus and auto/manual exposure functions. The ccd image sensor is also used as a sensor for auto focus, auto exposure and auto white balance control. This could eliminate the additional sensors. A shutter wheel is built for continuous exposure, which allows the host computer to display the entire field of view for preview without using an additional optical viewfinder. The digital signal processing is implemented in a computer software for interpolation, color reproduction, and edge enhancement, etc. A SCSI interface is used to connect to a host computer for data and command transmission.

关键词： cameras

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Evaluation system for a digital still camera

Evaluation system for a digital still camera

引用

solid state sensor arrays and ccd cameras

作者： Lin, Sheng-Yuan Chan, Wen-Hsin Industrial Technology Research Inst. Chutung Hsunchu Taiwan

ISBN: (纸本)081942028X

We describe in this paper an evaluation system for completely characterizing a digital still camera developed at our laboratory. The ccd sensor array of the camera was first used to assess the modulation transfer function of the lens system, the calibrated lens was then used to measure the single-chip color ccd sensor array. Accordingly, performance of the complete camera system can be evaluated as a whole. Measurements performed on this imaging system include dynamic range, signal to noise ratio, modulation transfer function and contrast transfer function of the lens as well as the ccd. With the help of a standard color test plate and prior knowledge about the spectral distributions, spectral response of the color filters coated on the ccd were computed approximately. The results of our experiments were compared with the data sheet provided and the theoretical calculation. The apparatuses needed for measuring the entire imaging system include only calibrated light source and standard test patterns, while the data access subsystem was part of the digital camera and the mathematical analyzing tools are developed on a personal computer. Consequently, system design was simplified and the evaluation process was made more efficient and cost effective.

关键词： cameras

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High-resolution trilinear color TDI ccd image sensor

High-resolution trilinear color TDI CCD image sensor

引用

solid state sensor arrays and ccd cameras

作者： Agwani, Suhail Miller, James DALSA Inc. Kitchener ON Can

ISBN: (纸本)081942028X

We have developed a 6032 element, 32 stage Tri-linear Time Delay and Integration Focal Plane Array for high resolution color imaging applications. The sensor offers an improvement of a factor of 10 over comparable line scan ccd sensors. The imager architecture utilizes three individual TDI arrays, with a new multi-layer dielectric interference film color filter that helps achieve accurate spectral separation in the three primary color bands centered at 450 nm, 550 nm and 650 nm respectively. We have also incorporated in the sensor a new programmable responsivity mechanism. This is achieved by an on-chip imaging area size selection mechanism. The sensors operate in the time-delay-and-integration mode. Depending on the level of illumination the user is able to dynamically select the number of TDI stages per sensor. The total number of TDI gain stages can be selected in blocks of 32, 16, 8, or 4. This property provides improvement in the dynamic range of the sensor by extending the response of the ccd over a wide range of illumination levels. Depending on the light energy incident on the sensor, the user can dynamically vary the number of TDI stages used for integrating an incident scene. The result is a programmable responsivity depending on the level of incident illumination. Such a technique optimizes the performance of the ccd color sensor. Given the resolution, speed, sensitivity and the dynamic range, this sensor is suitable for a variety of color imaging applications including multi-media, document scanning, pre-press scanning, medical and machine vision.

关键词： Charge coupled devices

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ccd controller requirements for ground-based optical astronomy

CCD controller requirements for ground-based optical astrono...

引用

solid state sensor arrays and ccd cameras

作者： Leach, Robert W. San Diego State Univ. San Diego CA USA

ISBN: (纸本)081942028X

Astronomical ccd controllers are being called upon to operate a wide variety of ccds in a range of ground-based astronomical applications. These include operation of several ccds in the same focal plane (mosaics), simultaneous readout from two or four corners of the same ccd (multiple readout), readout of only a small region or number of regions of a single ccd (sub-image or region of interest readout), continuous readout of devices for drift scan observations, differential imaging for low contrast polarimetric or spectroscopic observations and very fast readout of small devices for wavefront sensing in adaptive optics systems. These applications all require that the controller electronics not contribute significantly to the readout noise of the ccd, that the dynamic range of the ccd by fully sampled (except for wavefront sensors), that the ccd be read out as quickly as possible from one or more readout ports, and that considerably flexibility in readout modes (binning, skipping and signal sampling) and device format exist. A further requirement imposed by some institutions is that a single controller design be used for all their ccd instruments to minimize maintenance and development efforts. A controller design recently upgraded to meet these requirements is reviewed. It uses a sequencer built with a programmable DSP to provide user flexibility combined with fast 16-bit A/D converters on a programmable video processor chain to provide either fast or slow readouts.

关键词： cameras

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40-MHz analog signal processor (with CDS/H) for high-definition motion-still video systems

40-MHz analog signal processor (with CDS/H) for high-definit...

引用

solid state sensor arrays and ccd cameras

作者： Kannegundla, Ram Boisvert, David M. Eastman Kodak Co. Rochester NY USA

ISBN: (纸本)081942028X

Camcorders record motion video while electronic still cameras and computer cameras capture still images. Most camcorders are NTSC resolution, analog-based systems. A megapixel progressive scan motion and photographic still system is described in this paper which uses a high-resolution color ccd imager and the analog signal processing in Kodak Digital ScienceTM KASP series integrated circuits. For maintaining the 30 frames per second (fps) the sensor is clocked out at 37.5 MHz. The video output from a ccd sensor is in the shape of a high-frequency digital clock whose reset pedestal is embedded with KTC noise. Hence a correlated double sample and hold (CDS/H) circuit can give the difference between the reset pedestal and the video for every pixel and thus eliminate the KTC noise and 1/f noise. Every camera using a ccd sensor will have a CDS/H. Most cameras implement CDS/H at 40 MHz in the form of a filter or use general purpose track and hold amplifiers. Both options are bulky, expensive, and power hungry. Kodak has developed a monolithic 40 MHz analog signal processor (KASP-140G) with CDS/H using QuickTile standard cell architecture of Tektronix, Inc., using the Quickic tool set and the TSPICE analog circuit modeling tools. The paper describes the high-resolution progressive scan sensor, data rate speed issues, and present implementation methodologies of CDS/H at 40 MHz and compares the power, performance and cost savings by using KASP-140G. Kodak has designed four different analog signal processing chips with varying levels of power consumption and speed for analog signal processing of video output of ccd sensors. The analog application specific integrated circuits have been characterized for noise, clock feedthrough, acquisition time, linearity, variable gain, line rate clamp, black muxing, affect of temperature variation on chip performance, and droop. The ASP chips have met their design specifications.

关键词： cameras

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Enabling technologies for a family of digital cameras

Enabling technologies for a family of digital cameras

引用

solid state sensor arrays and ccd cameras

作者： Parulski, Kenneth A. Jameson, Peter H. Eastman Kodak Co. Rochester NY USA

ISBN: (纸本)081942028X

This paper describes the technology used in a new generation of digital cameras. The cameras all use full-frame image sensors optimized for producing still images in electronic cameras. The color ccds incorporate the Bayer color filter array pattern, lateral overflow drain antiblooming protection, accumulation mode timing, and progressive scan readout. The three cameras described have ccds with 6.3 million, 1.6 million, and 400 thousand pixels, with 9 micron square pixels and a 3:2 image aspect ratio. They use a firmware-based digital camera architecture to maximize flexibility and image quality. Extensive digital image processing is performed in the host computer, as the images are downloaded from the camera. This enables the cameras to use sophisticated image processing algorithms that can be easily upgraded in the field and customized for special customer applications.

关键词： Video cameras

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ccd cameras for the Italian national telescope Galileo

CCD cameras for the Italian national telescope Galileo

引用

solid state sensor arrays and ccd cameras

作者： Bortoletto, Fabio Bonoli, Carlotta D'Alessandro, Maurizio Fantinel, D. Farisato, G. Bonanno, Giovanni Bruno, P. Cosentino, Rosario Bregoli, G. Comari, Maurizio Osservatorio Astronomico di Padova Padova Italy

ISBN: (纸本)081942028X

In the last years, the Charge Coupled Device (ccd) detectors have had a great development: 2048 × 2048 pixel formats are routinely produced by silicon foundries with good electro- optical characteristics. Scientific ccds now, not only offer the ability to be read from more than one output, but they can also be buttable to form mosaics in order to cover a larger field of view, requirement posed by the current telescope technology. The Italian National Telescope GALILEO (TNG) will support a large set of visual and near IR detectors dedicated to scientific measurements at the focal plane. Also tracking systems and Shack-Hartmann wavefront analyzers will be based on ccd technology. Due to the number of camera systems to be routinely operated, the possibility to have uniformed interaction and configuration of systems is emerged as an important requirement for this crucial part of the telescope. In this paper the detector and instrument plan foreseen for the TNG telescope will be presented on the first part, while on the second we will present the ccd controller, now at the end of development. Here presented is a modular system based on digital signal processors and transputer modules. It is interfaced to host computers (PCs, workstations or VME crates) via optical fibers and a specially developed VME-VSB interface board.

关键词： cameras

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Series of ccd cameras for low-light-level applications

Series of CCD cameras for low-light-level applications

引用

solid state sensor arrays and ccd cameras

作者： Peri, Michal L. Weaver, Daniel W. Ambrose, Tom P. Hirpara, Dan Gallagher, Susan Hall, Andrew M. Bone, Gregg Gordian Irvine CA USA

ISBN: (纸本)081942028X

We describe a series of five ccd cameras designed by Gordian for low light-level applications. The first device is a low-cost non-imaging astronomical autoguiding tracker based on the Texas Instruments TC255 ccd chip and an MC6811 microcontroller. Mounting off-axis, it provides standardized tracking-motor signals for any telescope with a dual-axis drive corrector, automatically compensating for the mechanical peculiarities of the drive, set- up factors, and pointing errors. The tracker can guide to ±1 arcsec on an 8th magnitude star when used with an 8' aperture, f/10 telescope. The basic autoguider design has been extended to produce self-contained 8-bit and 16-bit imaging cameras with autoguiding functionality. Images are buffered in PSRAM, then relayed to a host PC via an RS-232 serial connection. The addition of regulated thermoelectric cooling reduces ccd thermal noise and alleviates dark current saturation. Gordian has also designed two high-resolution cameras based on the Kodak KAF-0400 and KAF-1600 ccds. The cameras produce 16-bit images with 768 × 512 pixels or 1536 × 1024 pixels, respectively. Pixel size is 9 μm square. The camera head contains the ccd, thermoelectric cooling mechanism, analog electronics, and a custom-designed electromechanical shutter based on FlexinolTM actuator wire. A separate base unit houses a Motorola 68306 microprocessor and associated electronics for telescope control and on-board image processing. A stepper-motor based filter wheel can be attached directly to the camera head. The camera communicates with a personal computer via SCSI or serial connection. Software for the host PC provides additional control options, data storage, and image processing capability.

关键词： cameras

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Programmable multiresolution CMOS active pixel sensor

Programmable multiresolution CMOS active pixel sensor

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solid state sensor arrays and ccd cameras

作者： Panicacci, Roger Kemeny, Sabrina E. Matthies, Larry H. Pain, Bedabrata Fossum, Eric R. Jet Propulsion Lab. Pasadena CA USA

ISBN: (纸本)081942028X

CMOS active pixel sensors (APS) allow the flexibility of placing signal processing circuitry on the imaging focal plane. The multiresolution CMOS APS can perform block averaging on-chip to eliminate the off-chip software intensive image processing. This 128 × 128 APS array can be read out at any user-defined resolution by configuring a set of digital shift registers. The full resolution frame rate is 30 Hz with higher rates for all other image resolutions.

关键词： Optical sensors

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