Optical fiber coupling reflection-type photoacoustic microscopic imaging system

The utility model relates to the technical field of biomedical detection, and particularly discloses a reflection type photoacoustic microscopic imaging system based on optical fiber coupling. Comprising a light source unit, an optical fiber coupling unit, a reflective excitation-ultrasonic sensing integrated unit, a sample testing unit and a signal processing control unit, the optical fiber coupling unit is sequentially provided with an incident light optical fiber coupler, an optical fiber and an emergent light optical fiber coupler in the light transmission direction. The reflective excitation-ultrasonic sensing integrated unit is located at the rear end of the optical fiber coupling unit, and the sample testing unit is located under the reflective excitation-ultrasonic sensing integrated unit; the signal processing control unit sequentially comprises a signal amplifier, a signal filter, a data acquisition card, a computer, a three-dimensional scanning platform controller and a three-dimensional scanning p