Surgical microscope and stand assembly

A surgical microscope/stand assembly comprising:

• a microscope comprising an objective defining an optical axis;
• and
• a stand comprising:
• a base positionable to define a generally horizontal reference plane including an X and Y axis;
• and
• a movable linkage assembly connecting said base and said microscope and comprising:
• a support mounted to said base;
• a first arm pivotally mounted to said support for pivoting about an axis A1;
• a parallelogram linkage assembly mounted to said first arm for pivotal movement about an axis A2, said linkage assembly being vertically positionable relative to said base and comprising weight compensation means and brake means for selectively fixing the position of the linkage assembly;
• a second arm mounted to said linkage for pivotal movement about an axis A3;
• a third arm mounted to said second arm for pivotal movement about an axis A4, said axis A4 being substantially perpendicular to the third axis A3;
• a first motor drive for adjusting the pivotal position of said third arm about axis A4;
• said microscope mounted to said third arm for pivotal movement about an axis A5, said axis A5 being substantially perpendicular to said axis A4;
• and
• a second motor drive for adjusting the pivotal position about axis A5,
• wherein axes A1, A2 and A3 are substantially vertical, and said axes A4 and A5 are substantially perpendicular to the optical axis, and the pivoting about said axis A5 permitting lateral pivoting of the X viewing direction and the pivoting about said axis A4 permitting pivoting of the Y viewing direction.