Point diffraction digital holographic microscopy device based on multimode fiber

The invention discloses a point diffraction digital holographic microscopy device based on multimode fiber illumination. The device comprises a partially coherent light generation module, a telescope system, an object parameter light separation module and an image acquisition module, and the partially coherent light generation module is used for generating partially coherent illumination light; a laser is included, a first microscope objective, a ground glass sheet, an imaging unit and a multimode optical fiber unit which are sequentially arranged along a light path of the laser are included too, and the ground glass sheet is arranged perpendicular to an optical axis and can rotate around the optical axis to generate partially coherent light; the telescope system is used for obtaining object light wave field distribution with sample information; the object parameter light separation module is used for carrying out diffraction light splitting on object light waves with sample information from the telescope sys