29 August 2005 Laser ranging based on electro-optic effect in crystal
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Based on electro-optic effect in crystal, a novel laser ranging method is proposed. A special designed mono-block LiNbO3 crystal is laid after the laser transmitter. The CW-laser emitted from the transmitter propagates through the crystal and travels forward to the measured target. After being reflected by the target, the laser goes back and crosses the same crystal. Electric pulses with the steep enough edges are loaded on the crystal. Based on electro-optic effect, double refraction and internal double reflection effect in crystal, the crystal cuts off the round-trip light beams, and reflects a light pulse cut out by the crystal to a detector aside from the original beam path. The pulse width T is the period that laser goes forward and back between the crystal and the target. From the T one can get the measured range R. The feasibility of this method is proved by our experiments and a brand-new way for the laser ranging is provided.
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Dong Zhao, Dong Zhao, Liren Liu, Liren Liu, Jiming Wang, Jiming Wang, Weiqing Pan, Weiqing Pan, "Laser ranging based on electro-optic effect in crystal", Proc. SPIE 5875, Novel Optical Systems Design and Optimization VIII, 58750N (29 August 2005); doi: 10.1117/12.612668; https://doi.org/10.1117/12.612668

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