I think we should create an alignment experiment that generates a series of stripe images at fixed angle/phase but with a ramped stripe width. The stripes would start out broad an then increase in frequency getting finer and finer. Thsi would help to find the true limits of the back focal plane and better allow centering of the objective.
The experiment could be based on like the polarization rotator voltage ramp, with a start and stop stripe width, or more likely diffraction angle as this is how the stripe width is currently defined. It would be nice to also allow mulltiple angles as with fast SLM pattern changes this could provide an expanding circle of diffraction spots which would slowly spread to help define the limits across several regions of the optical path, not just the objective, although this should be the most restrictive.
I think we should create an alignment experiment that generates a series of stripe images at fixed angle/phase but with a ramped stripe width. The stripes would start out broad an then increase in frequency getting finer and finer. Thsi would help to find the true limits of the back focal plane and better allow centering of the objective.
The experiment could be based on like the polarization rotator voltage ramp, with a start and stop stripe width, or more likely diffraction angle as this is how the stripe width is currently defined. It would be nice to also allow mulltiple angles as with fast SLM pattern changes this could provide an expanding circle of diffraction spots which would slowly spread to help define the limits across several regions of the optical path, not just the objective, although this should be the most restrictive.