By Topic

1990 Fourth International Conference onAdvanced Infrared Detectors and Systems

5-7 Jun 1990

Filter Results

Displaying Results 1 - 25 of 31
  • Impact of finite image size on signal-to-noise ratio of scanning IRCCD arrays

    Publication Year: 1990, Page(s):132 - 137
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    The signal-to-noise ratio (SNR) is one of the most important quantities in assessing the performances of infrared systems. The purpose of the work described is to compute this factor for several configurations of a scanning infrared charge-coupled device (IRCCD) and to give prominence to its dependence on optics, detector geometry and scan motion parameters. This task has been accomplished by a co... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Space science applications of infrared detector technology: a review

    Publication Year: 1990, Page(s):125 - 131
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (508 KB)

    Applications of infrared techniques to space science are surveyed and the needs for new technologies are identified. The scope of this review includes space astrophysics, Earth observations from space and deep space exploration. The potential impact of developments in detector technology is reviewed View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 3-5 μm photoconductive detectors on liquid-phase-epitaxial-MCT

    Publication Year: 1990, Page(s):120 - 124
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (120 KB)

    The authors aim to demonstrate the possibility to manufacture MCT-PC-detectors on the basis of LPE-material in the spectral range from 3-5 μm. The LPE-arrays exhibit the same performance as bulk arrays, but an improved homogeneity. The importance of annealing for the LPE-device technology has been examined. In addition to the advantage in homogeneity, the major potential of this technology lies... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An uncooled solid state thermal imager

    Publication Year: 1990, Page(s):93 - 99
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (460 KB)

    A compact low power imager based on a two dimensional uncooled detector array has been demonstrated. This has involved the development of new signal processing techniques involving a hybrid analogue and digital approach to achieve low power consumption. The detector used is an 8-14 μm, 100×100 element array using PbZrO3 pyroelectric ceramics. The design of the imager is particu... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A performance prediction and simulation model for 2 dimensional array imagers

    Publication Year: 1990, Page(s):171 - 182
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (656 KB)

    A performance prediction model for 2 dimensional infrared detector arrays has been developed by the Future Systems Laboratory of GEC Sensors Ltd. This model produces summary performance parameters which are compatible with those already used by the infrared industry for assessment of thermal imaging equipment based on conventional technology. The extension of MRTD into the region in which aliasing... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Submicron thin-film MOM diodes for the detection of 10 μm infrared laser radiation

    Publication Year: 1990, Page(s):116 - 119
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (124 KB)

    The authors report on the manufacture and characterization of thin-film Ni-NiO-Ni tunnel diodes for the detection of 10 μm CO2 laser radiation. The results are compared with previous studies View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The long wavelength channel detector for the ISOCAM camera

    Publication Year: 1990, Page(s):4 - 8
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    The European satellite ISO is a scientific satellite devoted to the observation of the Universe within the 2.5-200 micron wavelength range. Among the four scientific instruments of ISO's focal plane, the ISOCAM camera is designed to provide 32×32 pictures in the 2.5-5.5 μm and 4-17 μm bands. The authors describe the ISOCAM camera and the long wavelength channel (LWC) detector and prese... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • High performance pyroelectric arrays for imaging and guidance applications

    Publication Year: 1990, Page(s):88 - 92
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    The successful development of a 64-element pyroelectric array detector and its performance in a thermal imager has been described previously. The authors describe a newly developed `improved' version of this detector in which the detectivity has been enhanced significantly, by using `active' instead of the conventional `passive' compensation, for minimising the effects of ramps in ambient temperat... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A new generation of thermal imagers

    Publication Year: 1990, Page(s):166 - 170
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (364 KB)

    The authors describe the principles of operation and the hardware techniques which are used to produce a new generation of thermal imagers based on the use of IRCCD detectors. The designs are optimised for use in harsh military environments and place a premium on reliable and maintainable techniques to give an acceptable cost of ownership. CONDOR and TIGER are required to provide high performance ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Detector performance studies for CO2 laser heterodyne systems

    Publication Year: 1990, Page(s):112 - 115
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (196 KB)

    The authors discuss experimental results obtained with Joule-Thomson cooled CMT photodiodes, in a variety of systems and applications. Two types of study have been conducted, firstly an evaluation of a range of detectors on the laboratory bench, and secondly, performance studies on detectors installed in different lidar equipments. It is concluded that a heterodyne detector/amplifier should have t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Are the technologies user friendly?

    Publication Year: 1990, Page(s):1 - 3
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (172 KB)

    The author attempts to define the most likely future users of the IR technology and discusses the `friendliness' of the IR technology and IR systems View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hybrid CdHgTe-silicon infrared focal plane arrays

    Publication Year: 1990, Page(s):78 - 87
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (792 KB)

    Infrared sensitive focal planes consisting of matrices of photovoltaic CdHgTe diodes coupled to silicon multiplexing circuitry have been demonstrated in linear formats up to 1024 elements and in high density, multifunctional, two-dimensional arrays of up to 128×128 elements. The authors describe the technology used, in particular with respect to the radiometric performance achieved in hybrid... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sea Owl-a passive identification device for the Royal Navy Lynx helicopter

    Publication Year: 1990, Page(s):158 - 165
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (596 KB)

    The authors describe the MOD sponsored Sea Owl system developed by GEC Sensors to satisfy the Royal Navy's requirements for a passive identification device for the Lynx helicopter. The programme status is outlined and future potential system enhancements are indicated View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 128×128 3-5 μm focal plane arrays at 77 K and 200 K operation

    Publication Year: 1990, Page(s):54 - 60
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    The authors describe results obtained at LIR on photovoltaic detectors made on LPE layers and interconnected by metallic bumps to CCD Si circuit. 128×128 mosaics with 50 μm pitch detecting in the 3-5 μm wavelength range were tested at 77 K and 200 K operating temperature. The results indicate the high quality and homogeneity of the CMT epilayers and the maturity of the photovoltaic and... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A multiple point correlation tracker for time-to-go estimation

    Publication Year: 1990, Page(s):138 - 144
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (288 KB)

    It is shown how it is possible to estimate time-to-go to a landmark using the output from a multiple point correlation (MPC) tracker. It is shown how the correlation process is equivalent to a classical parameter estimation problem where the horizontal and vertical shifts between reference and search images are the state variables. A model of the motions between frames is postulated and analytical... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A hand held thermal imager employing a staring array of pyroelectric detectors

    Publication Year: 1990, Page(s):100 - 104
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (348 KB)

    A hand held thermal imager has been designed and built, using a staring array of uncooled pyroelectric detectors. The prototype imager is configured in three separate units; a sensor head, an electronic processing unit and a battery box. The equipment may be used in field assessment situations, the sensor head being carried in the hand with the other two units deployed in a carrying pouch. The aut... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Strip speed measurement using distributed infrared detectors

    Publication Year: 1990, Page(s):183 - 188
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    An instrument has been developed using inexpensive pyroelectric infrared detectors which measures the speed of non-metallic (copper) strip in the range 0.1-5 m s-1. The instrument has been tested on an experimental rig designed to simulate works conditions as closely as possible, particularly in regard to vibration, strip wobble and sudden speed changes. For high emissivity (coated) str... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The design and performance options for SPRITE arrays

    Publication Year: 1990, Page(s):9 - 14
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (304 KB)

    SPRITE arrays based on cadmium mercury telluride (CMT) technology have been incorporated into production systems for the civilian and military market. The range of systems requirements demand a flexible SPRITE array technology whereby parameters, such as wavelength, thermal sensitivity, uniformity and MTF, can be optimised for any particular application. The authors discuss feasibility development... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Photovoltaic Hg1-xCdxTe detectors for 12 μm application

    Publication Year: 1990, Page(s):30 - 35
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (180 KB)

    Hg1-xCdxTe (MCT) is the most important material for infrared quantum detectors in the wavelength range of 8-12 μm. The authors have manufactured bilinear arrays of photovoltaic detectors for the 12 μm wavelength region using a planar diffusion technology on MCT epilayers grown on CdZnTe substrates. The diodes show large Rshunt and R0A values, nearl... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Future infrared detector technologies

    Publication Year: 1990, Page(s):61 - 68
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (464 KB)

    The future trends in infrared detectors are towards larger, electronically addressed arrays and higher operating temperature. This will lead both to higher performance and to smaller, lighter more affordable systems. Three detector technologies are discussed; electronically addressed thermal detector arrays; Schottky barrier devices; and CMT focal plane arrays. IR detectors based on low dimensiona... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An infrared system for automatic detection of targets

    Publication Year: 1990, Page(s):145 - 151
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    The authors deal with automation of the process of target acquisition in AFVs (armoured fighting vehicles). They highlight some of the key points of a project which involved identifying all potential sensor technologies and comparing them to known target signatures. A set of `essential' selection criteria was established and an initial filter of the technologies undertaken. From the resultant shor... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • NA hand held imager for 2 dimensional detector arrays

    Publication Year: 1990, Page(s):105 - 111
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (500 KB)

    A hand held imager has been developed for the evaluation of 2 dimensional infrared detector arrays in the field. This unit is capable of operation with a variety of detector configurations, and has been demonstrated in operation with a 3-5μm 64×64 element CMT IRCCD. In this configuration, outstanding thermal sensitivity has been achieved. The imager offers many additional features includi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Advanced materials techniques for large HgCdTe focal plane arrays

    Publication Year: 1990, Page(s):15 - 19
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    The advent of advanced materials techniques (MOCVD and MBE) for growing HgCdTe on alternative substrates has opened new avenues for IR system development. 128×128 and 256×256 SWIR staring arrays of HgCdTe grown on sapphire substrates offer highly sensitive viewing of distant astronomical objects. Similar sized HgCdTe/sapphire MWIR arrays at 77 K have shown in-lab noise equivalent tempe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fourth International Conference on Advanced Infrared Detectors and Systems (Conf. Publ. No.321)

    Publication Year: 1990
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (116 KB)

    The following topics were dealt with: HgCdTe focal plane arrays; MOVPE grown photoconductive detectors; HgCdTe LWIR arrays; photovoltaic detectors; monolithic IR sensor arrays; chalcogenide based IR detectors; ferroelectric IR detector arrays; hybrid focal plane arrays; pyroelectric arrays; uncooled thermal imager; hand held thermal imager; 2D detector arrays; IR laser radiation detection; CO... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Materials and technology research in uncooled ferroelectric IR detector arrays

    Publication Year: 1990, Page(s):69 - 77
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (636 KB)

    A technology for the fabrication of large hybrid pyroelectric arrays has been established using the lead compound perovskite ceramics. The research on dielectric bolometer mode ceramics and deposited thin films, and on improved thermal isolation of elements will lead to further improvements as indicated by the merit figures and performance discussed. Providing that techniques can be found in these... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.