Patent ID: 8305684

Claim:
A microscope apparatus comprising, in order from an object: an objective lens collecting light from the object; and optical systems forming two or more optical paths that are parallel to an optical axis of the objective lens and that are arranged so that light exited from the objective lens travels along the two or more optical paths, and all lens groups of the optical systems that are along an optical path of the two or more optical paths being rotational symmetric systems, wherein, when a sum of maximum diameters of entrance pupils of said optical systems forming any two optical paths among the two or more optical paths, and which have approximately the same shape and are arranged without overlapping each other, is set as ΣDi, and an axial luminous flux diameter determined from a maximum aperture angle α and a focal distance f of the objective lens is set as Dobj, a condition of the following expression is satisfied, ΣDi>Dobj where Dobj=2·f·sin α.