Figure 6
From: Confocal imaging of single BaTiO3 nanoparticles by two-photon photothermal microscopy

Schematic of laser scanning two-photon photothermal microscope. M: Mirror, AOM: Acousto Optic Modulator, S1: Aperture, T: Telescope, PB: Polarizing Beam splitter, X&Y: Scan Mirrors, SL: Scan Lens, S: Sample, G: Glass slide, NDF: Neutral Density Filter, B-PD: Balanced Photo Receiver, BPF: Band Pass Filter, DM: Dichroic Mirror, DAQ: Data Acquisition card, CPU: Computer, LIA: Lock-In Amplifier, SG: Signal Generator. Continuous line shows the optical path and dotted line represents the electrical signal path.