21 October 2005 Long range 3D active imagery with a scanned single element 1.5 μm coherent lidar system
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Abstract
Recent progress on the development of a long-range, high-resolution 3D active imaging sensor is described. Diffraction limited angular resolution of 20μrad and sub-metre down range resolution are demonstrated at stand-off ranges of 8km. A scanned single pixel arrangement was employed using an all-fiber coherent lidar operating in a chirp-pulse-compression mode. The monostatic antenna had an aperture of 150mm and the image was built up using a piezoelectric tip/tilt stage positioned prior to the final expansion of the beam. Transmit/receive multiplexing was achieved with a fiber optic circulator. Examples of recently acquired images consisting of 150x150 pixels with 1000, 30cm range cells per pixel at a stand-off range 8km are presented.
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Guy N. Pearson, Kevin D. Ridley, David V. Willetts, "Long range 3D active imagery with a scanned single element 1.5 μm coherent lidar system", Proc. SPIE 5988, Electro-Optical Remote Sensing, 59880M (21 October 2005); doi: 10.1117/12.632788; https://doi.org/10.1117/12.632788
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