Method and lidar system for measuring air turbulences on...

Details Method and lidar system for measuring air turbulences on... Method and lidar system for measuring air turbulences on...

2011-04-26

2011-04-26

Tarcza, Thomas H (Department: 3662)

Optics: measuring and testing

Velocity or velocity/height measuring

With light detector

Reexamination Certificate

active

07933002

ABSTRACT:
The invention relates to a method for measuring air turbulences with a lidar system, particularly on board aircraft during which a pulsed expanded laser beam (12) of a predetermined wavelength is emitted up to a spatial area and light backscattered from this spatial area is received. At a first point in time t1and at a second point in time t2after emitting a laser pulse (L), the intensity distribution in the cross-section of the backscattered light is measured, and an air turbulence in a measuring field defined by points in time t1and t2is determined from the comparison of both intensity distributions. Images of speckle patterns are recorded with the aid of cameras (21, 22). An evaluation unit (30) conducts a cross correlation in order to render the turbulence visible and to display it on a monitor (35).

REFERENCES:
patent: 5610703 (1997-03-01), Raffel et al.
patent: 6578961 (2003-06-01), Vaez-Iravani
patent: 2004/0141170 (2004-07-01), Jamieson et al.
patent: 2008/0190192 (2008-08-01), Bommier et al.
patent: WO2006103325 (2006-10-01), None

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