<論文>レーザーによる空気力学的実験法

概要

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Applications of a Ne-He gas laser to conventional schlieren method and Mach-Zehnder interferometry are very successful. The high brightness of the laser light source results in so sensitive schlieren photographs that the maximum sensitivity obtained is actually limited by diffraction of the laser light beam due to the models. The high monochromaticity and brightness of the laser light make adjustments of Mach-Zehnder interferometers very easy, and we can obtain high quality interferograms for fields with very large optical path differences beyond millions of the fringe shifts. Such high interferency of the laser light in Mach-Zehnder interferometry suggests several new applications, for instance, measurements of tempsrature fields in transparent liquid or solid and strain analyses of solid models. A few other laser applications to gasdynamic testing are proposed, including heterodyne detection of two laser lights in order to analyse an interference of light wave with a plasma.
宇宙航空研究開発機構の論文