Chapter 5 Laser Unit
5.4 LU4A Four-laser Module A
1-177
Figure 5.4-58
16. Check that the 0th-order light from the AOTF unit is
shielded by the shield plate. And then, close the
shutter of the optical path for the Ar laser light.
If the 0th-order light is not shielded, the position of
the shield plate must be adjusted. Loosen the clamp
screw of the shield plate, and then adjust the position
so that the shield plate stops the 0th-order light.
17. Remove the centering tool attached in step 9.
1st-order light
0th-order light Light-shielding plate
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