MOUNTING MODULES ON THE VERTICAL BREADBOARD
APPENDIX A: Accessory optical path
SECTION 3: WIRING
Set up scanimage
Machine data file setting
Wiring galvos / voice coil / PMTs / etc.
SECTION 4: TABLE OPTICS ALIGNMENT
Align table optics at 900nm with the laser in alignment mode
1) Mount pockels cell just after laser, and align so that beam goes through it. Then manually set pockels cell power to about 10% for the rest of the alignment procedure.
2) Place beam expander after pockels cell. Adjust its height and the position of the front entrance such that the beam passes through the center of the iris on the beam expander. Adjust the position of the back end of the beam expander such that the beam passes straight through it. Adjust the beam expander so that the beam is collimated.
3) Position two silver mirrors such that the beam hits their centers and is steered towards the PPC. Make sure the beam remains level at its original height. Do this using an IR card stuck to a support to check beam height at different positions.
4) Place the uniblitz shutter just before the PPC in the path of the beam.
5) Adjust the positions of the enterance and exit irises at the beginning and end of the PPC so that the beam passes centeres through them.
6) Adjust height and lateral position of first two mirrors such that the beam hits both of them in the center. Then adjust the orientation of the mirrors so that the exiting beam direction is normal to entrance beam.
7) Position the large silver mirror such that the beam is centered on it, and adjust the mirror position such that the reflected beam is parallel to table and then adjust its angle it is entering prism close to its far edge.
8) Now adjust angle of prism to find the angle of minimum deviation using rotation stage (coarse). Do this by placing an IR card far away and rotating prism to find angle where beam is furthers to the right.
9) Now make sure reflected beam and incident beam are coplanar by adjusting the angle of the prism and looking at the height of the reflected beam on the IR card. The reflection is very faint and needs an IR viewer to be seen.
10) Now make sure the refracted beam is coplanar with the reflected and incident beam by adjusting the other angle of the prism.
11) Redo finding angle of minimum deviation using fine adjustment. This will be the angle where the beam is the rightmost possible.
12) Algin retroreflector axis. Adjust height of retreflector such that the return beam is centered on the roof mirror. Then adjust close side of rail such that the returning beam is hitting the prism a little further into the prism (2 to 3 mm). Then adjust the back position such the rail is exactly parallel to the beam. Slide the retroreflector back and forth along the rail to check that it is moving along the axis of the beam.
13) Adjust lateral position of roof prisms so that return beam is entering the prism, and rotate it so that the outbound beam 3 is hitting the retroreflector. Do fine angle adjustments of the prisms angle such that return beam 4 is level to table and colinear with track.
14) Mount output coupler. Place in bypass mode, and set target card after exit iris. Left bypass mode. Align exit beam to pass through iris and hit target by adjusting height of retroreflector so that beam passes through center of exit iris and move mirror to translate mirror, and use angle of mirror to make beam hit target on iris card.
15) Add two mirrors such that beam is level as it goes into the entrance of periscope.
16) Set periscope entrance mirror center to be 120 mm heigh (height of laser beam).
Pockels cell
Shutter
2x table beam expander
Assembling the compressor
Build enclosure for table optics
SECTION 5: MICROSCOPE ALIGNMENT
Multistage periscope alignment
Quarter wave plate adjustment for multistage periscope
Alignment of beam to remote focus objective
Adjustment of quarter wave plates for maximum transmission
Alignment of RF mirror assembly
Alignment of beam to imaging objective using compensators
Adjustment of galvo voltage divider gain
SECTION 6: IMAGING
Dye pool imaging to set compensators
Dye pool imaging to set retroreflector position
Image beads and measure PSF