Retina imaging method based on differential phase contrast imaging

The invention relates to the technical field of retina imaging, in particular to a retina imaging method based on differential phase contrast imaging, which comprises the following steps: firstly, an imaging system is built, the system is mainly composed of a planar light source and an imaging unit, and the planar light source comprises a plurality of light-emitting areas which can be independently controlled; asymmetric illumination of the fundus retina is achieved through one light-emitting area or the combination of multiple light-emitting areas, information light reflected back by the retina is collected through the imaging unit, differential information of the fundus retina is obtained for multiple times in an asymmetric illumination mode, phase information reconstruction of the fundus is conducted through a phase recovery algorithm, and the fundus retina is obtained. And finally, phase imaging of the human eye retina is realized. According to the invention, the contrast ratio at the fundus retina blood