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Altitude measurement using laser beam reflected from water surface
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نویسنده
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Mohammad Nejad SH. ,Haji Mirsaeidi H.
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منبع
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iranian journal of electrical and electronic engineering - 2005 - دوره : 1 - شماره : 1 - صفحه:36 -40
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چکیده
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In this paper altitude measurement from water surface using laser beam ispresented. research data indicate that the reflection of infrared waves from water surface isabout zero and it is less than 2% for visible radiations. phase-shift and heterodynetechnique was used for the measurement, and the laser beam ( mw p nm 10 , 700 = = l ) wasmodulated by a sine wave having a fixed frequency. the optimum design and low-noiseelements made it possible to detect a light power about 20 nw at operating frequency.
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کلیدواژه
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laser altimeter ,phase shift ,heterodyne technique ,water surface.
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آدرس
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iran university of science and technology, Department of Electrical Engineering,, ایران, iran university of science and technology, Department of Electrical Engineering,, ایران
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Authors
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