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Alignment
Kyle M. Douglass edited this page May 8, 2026
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Beam height above table surface: 160 mm
- Ensure that the alignment laser is level with the table by checking its height at two separate, far apart locations on the bench.
- Ensure that the alignment laser is collimated. Below is a table of wavefront radii of curvature at different distances from the laser as measured with a Shack-Hartmann wavefront sensor.
- Set the alignment laser beam height to ~160 mm above the table surface.
- Ensure that the galvanometer mirror is at that correct height above the table by carefully putting the alignment laser next to it and visually verifying that it would intercept the entire cross section of the beam.
| Distance, cm | RoC, m |
|---|---|
| 50 cm | -30 +/- 1 |
| 75 cm | -35 +/- 2 |
| 100 cm | -40 +/- 3 |
- Set the galvanometer voltage to 0V