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We analyze the measuring principle and propose a calibration technique based on perpendicular cross-lines for line structured light 3D scanner. By use of straight line features and perpendicular constraints of the cross-lines, the technique doesn't require the world coordinates of those feature points on calibration template. The turntable of the 3D scanner rotates with the calibration template. We...
Femtosecond Yb:YAG laser at 1053 nm was realized by optimized crystal length and doping concentration, stable mode-locking power of 180 mW was achieved under 2 W pump. Measurement shows 170 fs pulse duration and 7 nm spectrum bandwidth.
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