Patent ID: 8092471

Claim:
A position measuring apparatus for surgery comprising: a position indicating means for indicating two axial setting position and two plane setting direction of a surgical tool, said position indicating means including a pair of laser beam emitting means for emitting two respective laser beams scanned to form two planes, respectively, that intersect in a surgical field, where said two-axial setting-position is indicated by an intersection of said laser beams on a surface of a surgical object; three dimensional position measuring means for measuring a position and a direction of said surgical field and also the setting-position and the setting-direction of said surgical tool; and a control unit for controlling operation of said position indicating means and said three-dimensional position measuring means, wherein said position indicating means and said three-dimensional position measuring means being fixed on a common base, so that relative positional relationship therebetween is constant; and wherein said setting-direction for said surgical tool is given in a form of an intersection line formed by an intersecting said two planes which are formed by said two respective laser beams.