The OPO (Optical Parametric Oscillator) System is a multiphoton long-wavelength scanning microscope system under development by LOCI. It is a hybrid design of fabrication systems including the Fluoview imaging system and uses Wiscan imaging software. Forward detection can be used to measure second harmonic generation (SHG) and third harmonic generation (THG). The system will also have adaptive optics and lifetime measurement capabilities. The OPO System will have a wide range of uses including broadband excitation, label-free imaging, polarization control, and deep imaging.