Patent ID: 6624932
Filing Date: 2003-09-23
Classification: A61B,G02B

Abstract:
A surgical microscope comprising:an objective lens having an optical axis, a front side facing an object to be observed and an axially opposed rear side; an illumination light deflector axially spaced from and behind said objective lens, said illumination light deflector deflecting illumination light into a region of said objective lens radially spaced from said objective lens optical axis and in a direction parallel to said objective lens optical axis; a first reflecting element axially intermediate said objective lens and said deflector and moveable perpendicular to said objective lens optical axis to divert a selected portion of said illumination light incident on said objective lens into a direction perpendicular to said objective lens optical axis; and a second reflecting element radially opposed to said first reflecting element to redirect the selected portion of illumination light into said objective lens, said second reflecting element moveable perpendicular to said objective lens optical axis to determine a selected radial distance from said objective lens optical axis at which said portion of illumination light enters said objective lens, wherein a quantity of illumination light included in said selected portion is dependent upon a position of said first reflecting element relative to said objective lens optical axis.