1 January 1992 High-speed IR imaging of repetitive events using a standard RS-170 imager
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We have developed a system which allows repetitive events at frequencies up to 4 kHz to be imaged without aliasing. An off-the-shelf optomechanical imager (Inframetrics IR 600) is used in conjunction with a microcomputer and a specially developed hardware interface. The effective integration time of the system is equivalent to the horizontal line scan time (125 microsecond(s) ). Images are constructed by acquiring horizontal lines which are in phase with a reference signal emanating from the target. Multiple occurrences of a given line are displayed as a linear average so that the in-phase component appears amplified in the final image. Images of flame front propagation in an operating engine combustion chamber, and transient spatial heat distribution in a transistor operating at 2.5 kHz have been acquired.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Steven M. Shepard, Steven M. Shepard, David T. Sass, David T. Sass, Thomas P. Imirowicz, Thomas P. Imirowicz, } "High-speed IR imaging of repetitive events using a standard RS-170 imager", Proc. SPIE 1539, Ultrahigh- and High-Speed Photography, Videography, and Photonics '91, (1 January 1992); doi: 10.1117/12.50564; https://doi.org/10.1117/12.50564

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