in Figure 4- 15.
Figure4- 15 Fast Calibration
After the left side calibration, perform the upper 45 degree calibration, tilt the
scanner upward by about 45 degrees, and the laser beam is kept between the
fourth line and the fifth line mark point, so that the shadows coincide, as shown
in Figure 4-16.
Figure4- 16 Fast Calibration
After the upper side is calibrated, the lower side 45 degree calibration is
performed, and the scanner is tilted downward by about 45 degrees, and the laser
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