15 October 2012 A large-angle high speed scanner based on electro-optic crystal for Fresnel telescope synthetic aperture imaging ladar
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Abstract
The cross-orbit scanning is very important for Fresnel telescope synthetic aperture imaging ladar system. This paper presents a design of large-angle high speed scanner based on electro-optic crystal for the cross-orbit scanning in Fresnel telescope synthetic aperture imaging ladar system. The designed scanner is based on the space-charge-controlled EO effect in KTN. In the experiment the crystal temperature should be kept a little higher above Tc to obtain a large EO effect and the polarization of the laser beam should be parallel to the direction of the driving electric field. Compared with other conventional EO crystal scanner, the new scanner can greatly improve the scanner angle by several times when maintains high speed and accuracy, which will have a great potential for cross-orbit scanning applications in Fresnel telescope synthetic aperture imaging ladar system.
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Jun Xu, Ya'nan Zhi, Xuping Wang, Jianfeng Sun, Yu Zhou, Enwen Dai, Liren Liu, "A large-angle high speed scanner based on electro-optic crystal for Fresnel telescope synthetic aperture imaging ladar", Proc. SPIE 8520, Unconventional Imaging and Wavefront Sensing 2012, 85200V (15 October 2012); doi: 10.1117/12.928398; https://doi.org/10.1117/12.928398
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