A medical imaging system (10) including an optical branching device (101) having a plurality of optical paths for guiding light for imaging a target comprising a biotissue, each of the optical paths corresponding to an optical port connectable to an external device for imaging, wherein at least one path of the plurality of optical paths is configured both to guide the irradiation light to the biotissue and to guide light from the biotissue, and wherein the optical branching device includes a plurality of prisms and at least one joint surface.
