1. A wide viewing angle ocular fundus blood flow imaging device comprising: means for irradiating an ocular fundus with an expanded laser beam; means for imaging light reflected from the ocular fundus on a 2-dimensional image sensor as a laser speckle; and means for measuring, for each pixel of the laser speckle, a change over time of the laser speckle generated on an image plane, and for displaying a blood flow map based on the measured change, wherein the means for irradiating comprises a projection system that employs two laser beams and turns each of the two laser beams into respective rectangular spots on the ocular fundus, wherein each of the respective rectangular spots is disposed on a different region of the ocular fundus, and the means for imaging comprises an observation system that images the rectangular spots on the 2-dimensional image sensor placed on the corresponding image plane.