Infrared Imaging Abstracts: 2003
The following Abstracts of journal literature and patent specifications are taken, with kind permission, from Imaging Abstracts, published by Pira International on behalf of The Royal Photographic Society of Great Britain. These abstracts are dated up to 2003 and this facility is no longer maintained.
The abstracts are Copyright © 1997-2004 Pira International on behalf of the RPS. Original documents are in English unless otherwise stated. The abstracts published here are those which cover aspects of Infrared imaging and are made available here for informational purposes only. No liability can be accepted for the accuracy of the information given or any use that is made of it.
5 results found
An Analysis of the Spatial Homogeneity of a Photodetector Surface in an Infrared Image Converter using the Fractal Dimension
Salamov B G, Kurt H Y, Kurt E (Gazi University Ankara Turkey, University of Bayreuth Germany)
Imag. Sci. J. vol. 51, no. 4, 2003, pp 187-197
A method is presented of analyzing the spatial homogeneity of a 100 mm diameter photo-detector surface, by determining the spatial distribution of the gas discharge light emission of an ionization type IR image convertor, using a GaAs photodetector. The fractal dimension of the light emission is found when a current passes through the cell, and the procedure offers a useful NDT means which employs the whole surface of the photodetector. 36 refs.
Geometric Calibration Models of Infrared Cameras and Scanners for Photogrammetric and Remote Sensing Applications
Buyuksalih G (Karaelmas University Zonguldak Turkey)
Opt. Eng. vol. 42, no. 7, 2003, pp 1923-1934
Three types of infrared imager are distinguished, (a) the pyroelectric vidicon camera, (b) the CCD camera with a 2-D array, and (c) the thermal video frame scanner. Technologies for the calibration of such devices for both photogrammetric and remote sensing purposes are discussed in detail. 26 refs.
Infrared Camera
Ookawa N (Mitsubishi Denki KK)
Patent: US 6,504,155 - 07 January 2003
An infrared camera is described which is capable of being used over a wide range of temperatures. It includes a series of circuits, each of which is designed to control the camera operation over a specific temperature range; there is also present a temperature sensor, which determines the temperature range prevailing and selects the circuit appropriate to that range.
Focal-plane Arrays Open New Near-infrared Vistas
Richards A (Indigo Systems Corp Goleta CA USA)
Adv. Imag. vol. 18, no. 3, Mar. 2003, pp 14-18
Recent technological developments have allowed the production of highly sensitive near-infrared (NIR) cameras that deliver image quality with a spectral sensitivity in the 900-1700nm band. These cameras depend on the commercially available indium-gallium-arsenide (InGaAs) focal-plane array photovoltaic detectors, as well as the availability of higher-quality III-V semiconductor material in bulk wafers. Potential applications include laser-beam characterisation, agricultural and petrochemical inspection, forensics and NIR imaging spectroscopy. Indigo Systems offers three InGaAs cameras with varying levels of performance for various applications. The Phoenix NIR camera enables the user to select exposure times as short as several microseconds and as long as 660 milliseconds, allowing it to be used for a wide range of levels of illumination.
Image Thermal Characteristics Displayed
Alicandro C J, Poirier B A (Flir Systems Boston)
Patent: US 6,606,115 - 12 August 2003
An Airspot Mode technique is described for an infrared camera, whereby the hottest spot in an infrared scene can be automatically identified and tracked, captured and displayed. At the same time the appropriate temperature is indicated. These data are automatically updated for successive frames. For the Delta Mode, the difference in temperature between two indicated points in the scene can be displayed.