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PARS system experimental setup. The system imaging head is enclosed in the red box, while the system back-end optical processing section is enclosed in the blue box. Components are labeled as follows: quarter wave plate (QWP), polarizing beam splitter (PBS), collimator (COL), long pass filter (LP), aspheric lens (AL), dichroic mirror (DM), variable beam expander (VBE), objective lens (OL), beam dump (BD), galvo-mirrors (GM).
