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42
3. Move the axis so the moving optic is a close as possible to the laser and interferometer. Place the
alignment target onto the retroreflector.
Translation adjustment should be made to the laser to ensure the laser beam hits the correct area of
the target.
Figure 43 - Alignment target fitted
Note: If the laser has been translated by a large amount then it may be necessary to translate the
interferometer to match so that the beam is not clipped when passing through the interferometer.
Figure 44 - Laser translation adjustment
Standard retroreflector target
Long range retroreflector target
✓
✓
Figure 45 - Correct beam position on alignment target
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