28
Fig.3-16
Optical Calibration 2 Diagram
Standard pattern Non-standard pattern
Fig.3-17
Dynamic Focusing Scanning Galvanometer Adjustment
When the side plate of the galvanometer is opened, first remove the built-in focus lens (as shown in Figure
3-14), then loosen the screws of the vernier caliper, move to the far right, put optical path calibrator 1 in the light
inlet of the galvanometer, and insert into light-sensitive paper (as shown in Figure 3-15) in the optical path
calibrator 1. In power on state, run Han's Yueming marking software
, turn on laser, and adjust the
parameters to make the marking have relatively light marks in photosensitive paper. Observe whether the image
formed on the photosensitive paper has four equal quadrants as shown by the standard pattern in Figure 3-17,
and re-adjust 3D reflector 1 if not. After the incident light passes through the center of the light inlet of the
galvanometer on the rear panel, another point needs to be identified to ensure the correct optical path, and thus
the optical path calibrator 2 is designed. After adjusting the first point as shown in Figure 3-15, affix the
photosensitive paper to the surface of optical calibrator 2 (as shown in Figure 3-16), turn on the laser and check if
the image formed on the photosensitive paper has four equal quadrants, and re-adjust 3D reflector 2 if not (if the
optical path deviation is too large and beyond the adjustment range of 3D reflector 2, adjust the trimming table in
a wide range and then trim the 3D reflector 2). When the second point has been adjusted, check if the optical
path image of the first point still has four equal quadrants; if not, repeat the adjustment of the two optical points,
until the images of both points have four equal quadrants, which indicates that the incident laser is coaxial with
the optical axis.
