Infrared Imaging Abstracts for 1997
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.
The abstracts are Copyright © 1997-2003 Pira International on behalf of the RPS. Original documents are in English unless otherwise stated. For further information on Imaging Abstracts, which is available on paper, online and on CD-ROM, contact Pira International or email firstname.lastname@example.org.
Streak Camera Operating in the Mid-infrared
Drabbels M, Noordam L D (Institute for Atomic and Molecular Physics Amsterdam
An atomic streak camera is described which can be used over the range from near to far infrared. Gas phase atoms in a Rydberg state, containing electrons with low binding energies, are employed in place of the conventional type of photocathode. An illustration is given of the use of the instrument operating with radiation of wavelength µm. 10 refs.
Thermographic Imaging for High-temperature Composite Materials - a Defect Detection Study
Roth D J, Bodis J R, Bishop C (NASA Lewis Research Center Cleveland USA)
A thermographic imaging technique is described which was devised to detect defects of various sizes in flat-bottomed hole structures. It employed a scanning mirror, an infrared focusing lens, and a mercury cadmium telluride IR detector element, whereby IR images with high resolution could be obtained. Illumination was provided by high-intensity flash lamps, which also heated the samples. 8 refs.
Fabrication and Characterization of 640x486 GaAs based Quantum Well Infrared Photodetector (QWIP) Snap-shot Camera
Gunapala S D, Bandara S V, Liu J K, Hong W, Sundaram M (Jet Propulsion Lab Pasadena CA USA)
A 9µm quantum well infrared photodetector (QWIP) snap-shot camera was shown to exhibit excellent images with very low noise ratio. [More on this device]
Pixelless Infrared Imagers
Allard L B, Liu H C, Buchanan M, Wasilewski Z R (Nat Res Council Ottawa Canada)
A new concept in infrared imaging makes use of a large area photoconductive IR photodetector with a near IR light emitting diode on top to raise the frequency. The photons are then directed onto a silicon charge coupled device where the image is formed.