Mobile laser Raman radar for monitoring stack effluent pollutants

Nakahara, S.; Ito, Koichi; Tamura, S.; Kamokiyo, M.; Inaba, H.; Kobayashi, T.

doi:10.1109/jqe.1971.1076676

Cited by 4 publications

(1 citation statement)

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“…Also, various molecules, such as O 3 , CO, CH 4 , liquid and vapor H 2 O, were identified from automobile exhaust gas in air. After this experiment, the mobile scanning Raman laser radar system was developed by Nakahara et al 105 at Mitsubishi Electric Co. Ltd. using a Nd:YAG laser second harmonic beam at a wavelength of 532 nm. It was shown that SO 2 molecules in stack effluent plume were detectable with 1000 ppm concentration sensitivity at the slant range of 220 m. The Raman laser radar was also used for humidity sensing by water vapor Raman spectroscopic detection and was gradually extended into sensing of extinction coefficients of atmospheric aerosols by simultaneous measurement of Mie and nitrogen Raman spectra.…”

Section: Laser Radar Sensing In Japanmentioning

confidence: 99%

Laser radar: historical prospective—from the East to the West

Molebny¹,

et al. 2016

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This article discusses the history of laser radar development in America, Europe, and Asia. Direct detection laser radar is discussed for range finding, designation, and topographic mapping of Earth and of extraterrestrial objects. Coherent laser radar is discussed for environmental applications, such as wind sensing and for synthetic aperture laser radar development. Gated imaging is discussed through scattering layers for military, medical, and security applications. Laser microradars have found applications in intravascular studies and in ophthalmology for vision correction. Ghost laser radar has emerged as a new technology in theoretical and simulation applications. Laser radar is now emerging as an important technology for applications such as self-driving cars and unmanned aerial vehicles. It is also used by police to measure speed, and in gaming, such as the Microsoft Kinect.

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Section: Laser Radar Sensing In Japanmentioning

confidence: 99%