Experiment note: Noise in 2-photon microscope

We recently moved and redesigned our 2-photon microscope. I like designing optical system and aligning lenses and mirrors. But after these fun parts are over, I have to go through most boring things: denoising the whole system.

Today I tried to remove noise in scanning system of 2-photon microscope. I found a combination of 60Hz cycle and wiered slow noise. The latter turns out to be from grounding problem of mirror driver: I forgot to ground a power supply for the scanner. Before finding this problem, I burned a fuse of the scanner driver three times.... what a fragile ! anyway. I am still trying to find the cause of 60Hz cycle noise. So far this noise resists to extensive grounding and shielding and so on. Hopefully I can fix this problem tomorrow.