Patent ID: 8248616

Claim:
A measuring system, comprising: a measuring apparatus that projects measuring beams; a first reflecting surface on a body provided on an object, a normal line of the first reflecting surface extending in a first predetermined direction that includes a component of the Z axial direction; a second reflecting surface on the body, a normal line of the second reflecting surface extending in a second predetermined direction that includes a component of the Z axial direction, the first reflecting surface and the second reflecting surface being substantially symmetric with respect to the Y axial direction; and a third reflecting surface on the body, a normal line of the third reflecting surface extending in the Y axial direction, the measuring apparatus (1) projecting a first measuring beam along the Y axial direction toward the first reflecting surface and a second measuring beam along the Y axial direction toward the second reflecting surface and (2) obtaining positional information, in the Z axial direction, or in the Y and Z axial directions, of the object on which the body is provided by receiving reflected first and second measuring beams, and (3) projecting a third measuring beam along the Y axial direction toward the third reflecting surface and (4) obtaining positional information, in the Y axial direction, of the object by receiving a reflected third measuring beam, wherein the third reflecting surface is provided between the first reflecting surface and the second reflecting surface.