Galvanometer scanner and photoacoustic microscope system having the same

A photoacoustic microscope system comprising:

• a galvanometer scanner;
• a laser generator generating and outputting a laser beam;
• and
• a ring transducer positioned at a rear stage of the laser generator, outputting the laser beam output from the laser generator toward the galvanometer scanner, and outputting ultrasound input from the galvanometer scanner,
• wherein the galvanometer scanner includes:
• a mirror mounting shaft having a portion inserted into a shaft insertion opening of a housing which includes the shaft insertion opening and having contents contained therein;
• and
• a mirror mounted at the mirror mounting shaft and positioned inside the housing.