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1990 Fourth International Conference onAdvanced Infrared Detectors and Systems

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• Space science applications of infrared detector technology: a review

Publication Year: 1990, Page(s):125 - 131
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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»

• 3-5 μm photoconductive detectors on liquid-phase-epitaxial-MCT

Publication Year: 1990, Page(s):120 - 124
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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»

• Sea Owl-a passive identification device for the Royal Navy Lynx helicopter

Publication Year: 1990, Page(s):158 - 165
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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»

• Submicron thin-film MOM diodes for the detection of 10 μm infrared laser radiation

Publication Year: 1990, Page(s):116 - 119
| | PDF (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»

• The generation of 3-dimensional object representations from range images

Publication Year: 1990, Page(s):152 - 157
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The authors deal with the segmentation of surfaces from range images. The orientation and shape of the surfaces are then recognised and their connectivity determined to generate a model based representation of polygonal objects. A full mathematical treatment is given View full abstract»

• Are the technologies user friendly?

Publication Year: 1990, Page(s):1 - 3
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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»

• Detector performance studies for CO2 laser heterodyne systems

Publication Year: 1990, Page(s):112 - 115
| | PDF (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»

• An infrared system for automatic detection of targets

Publication Year: 1990, Page(s):145 - 151
| | PDF (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»

• Advanced materials techniques for large HgCdTe focal plane arrays

Publication Year: 1990, Page(s):15 - 19
Cited by:  Papers (1)
| | PDF (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»

• Fourth International Conference on Advanced Infrared Detectors and Systems (Conf. Publ. No.321)

Publication Year: 1990
| | PDF (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»

• NA hand held imager for 2 dimensional detector arrays

Publication Year: 1990, Page(s):105 - 111
| | PDF (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»

• High performance pyroelectric arrays for imaging and guidance applications

Publication Year: 1990, Page(s):88 - 92
| | PDF (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»

• A multiple point correlation tracker for time-to-go estimation

Publication Year: 1990, Page(s):138 - 144
| | PDF (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»

• A performance prediction and simulation model for 2 dimensional array imagers

Publication Year: 1990, Page(s):171 - 182
| | PDF (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»

• The design and performance options for SPRITE arrays

Publication Year: 1990, Page(s):9 - 14
| | PDF (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»

• Photovoltaic Hg1-xCdxTe detectors for 12 μm application

Publication Year: 1990, Page(s):30 - 35
| | PDF (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»

• HgCdTe (MCT) LWIR arrays by MOCVD on GaAs

Publication Year: 1990, Page(s):25 - 29
| | PDF (212 KB)

MOCVD growth of MCT on GaAs or GaAs/Si provides a means of obtaining large areas of high quality material at low cost for IR array processing. The authors report results from LWIR arrays on MCT grown on GaAs via a CdTe buffer. The arrays were processed by a modified planar technology. The n on p junction is formed by Hg diffusion through a mask on p-type layers. Sputtered passivation layers were u... View full abstract»

• A hand held thermal imager employing a staring array of pyroelectric detectors

Publication Year: 1990, Page(s):100 - 104
| | PDF (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»

• HgCdTe MIS photocapacitor detectors

Publication Year: 1990, Page(s):41 - 47
| | PDF (220 KB)

The noise of 10 μm HgCdTe MIS detectors has been measured and compared with the integrating detector model. The detector is dominated by photon g-r noise in the measured range of f/1 to f/2.8 cold shielding. The noise has negligible 1/f component from 30 Hz to the sampling frequency. Thus, the detector shows excellent BLIP performance under these conditions. The quantum efficiency exceeds 50% a... View full abstract»

• Hybrid CdHgTe-silicon infrared focal plane arrays

Publication Year: 1990, Page(s):78 - 87
Cited by:  Papers (1)
| | PDF (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»

• Impact of finite image size on signal-to-noise ratio of scanning IRCCD arrays

Publication Year: 1990, Page(s):132 - 137
| | PDF (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»

• A new generation of thermal imagers

Publication Year: 1990, Page(s):166 - 170
| | PDF (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»

• The long wavelength channel detector for the ISOCAM camera

Publication Year: 1990, Page(s):4 - 8
| | PDF (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»

• MOVPE grown (Hg, Cd)Te layers for room temperature operating 3-5 μm photoconductive detectors

Publication Year: 1990, Page(s):20 - 24
| | PDF (136 KB)

Hg1-xCdxTe (MCT) is the leading material in IR detection. In the aim of extending the IR application field of MCT, the lowest possible cost is required. A first approach is to minimize the cooling requirements in operating at temperatures >200 K, allowing the use of thermoelectric coolers. Photoconductors in the 3-5 μm wavelength window can be operated in a temperature ... View full abstract»

• An uncooled solid state thermal imager

Publication Year: 1990, Page(s):93 - 99
| | PDF (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»