Implement and test bidirectional ASLM

[AdvancedImagingUTSW]

Triangle based scan instead of sawtooth.

Should also get a solid number on the bandwidth of our scan capabilities for both waveforms.

[AdvancedImagingUTSW]

Discussion with voicecoil company raised the prospect of this again:

We can expect the closed-loop bandwidth of the system to be >200hz. A 20hz sawtooth will, of course, have rounded corners, just because mass has inertia (1st Law). (A 10hz wave would waste about 1/2 as much time is the corners.) In this case, the 10th harmonic component of the sawtooth (200hz) will be attenuated by about 1/2, and higher harmonics attenuated proportionately more. For a 20hz 90% sawtooth you could probably expect to get a linear region of about: 50-5-5 = 40ms, so effectively about 80%. (Here I’ve estimated that the corner-rounding could be about 5ms, depending on how much ripple you can tolerate, which wastes the same amount of time as the 10% back-scan.) Note that a 90% sawtooth has about 5X greater amplitude in its corners frequencies than a triangle wave (50% sawtooth) with the same fundamental frequency. That means, if you can use a triangle and acquire your optical information on both slopes, you will have a much higher percentage of linear regions with a triangle compared to a sawtooth. Compared to the linear-region estimate above, the triangle might be: 50-0-2 = 48ms or 96%.

We have quite a few models of Orca cameras. Not all of them support the bidirectional readout light-sheet mode.

Fusion BT - Not supported

Flash 4.0 V3 - No, but does allow each half to have its own light-sheet mode.

Lightning - Not supported.

Orca FIRE - Feature supported.

Orca Quest - Also supported...