Novel Hemispherical Scanner for a Coherent Fiber LIDAR System
LIDAR (LIght Detection And Ranging) systems have proven their value in the remote measurement of spatially resolved atmospheric wind velocities in a number of applications, including the detection of clear-air turbulence, wind shear, aircraft wake vortices, and microbursts. The capacity of coherent LIDAR systems to produce a continuous, real-time 3D scan of wind velocities via detection of the Mie backscatter of atmospheric aerosols in clear-air conditions and at stand-off distances of up to 50 km at relatively low pulse energy gives this technology a clear advantage over other atmospheric monitoring technologies.SIBELLOPTICS proposed and successfully executed on a Phase I SBIR contract whose purpose was to design, build, and test a novel hemispherical scanner as part of a compact all-fiber coherent wind LIDAR sensor. Activities included detailed drawings, procurement of the custom opto-mechanical materials, and build and test of the scanner assembly and controller.During the execution of contract NNX11CG86P SIBELLOPTICS designed, procured, and assembled the key components of the hemispherical scanner and controller and tested the assembly for operation with the control computer, repeatability of positioning, accuracy of pointing, and azimuth and elevation load endurance.In Phase II, it is proposed that, based upon findings and testing during Phase I efforts, the full hemispherical scanner system be designed, built, and tested using a computer-based controller that operates with an interactive, user-selected interface menu.
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