Patent ID: 9285576
Filing Date: 2016-03-15
CPC Classification: G02B

Claim Text:
1. A stereoscopic microscope having a first pair of stereoscopic optical paths allocated to a co-observer, and a second pair of stereoscopic optical paths allocated to a main observer, comprising: an objective system commonly traversed by each optical path of the first and second pairs of stereoscopic optical paths; a first focusing lens having a first optical refractive power and a second focusing lens having a second optical refractive power, the first and second focusing lenses, respectively, being separate elements commonly traversed by only the first pair of stereoscopic optical paths; and at least one actuator, the actuator being adapted to shift at least one of the focusing lenses along the optical axes of the first pair of stereoscopic optical paths for varying a working distance of the stereoscopic microscope; wherein the first focusing lens is immediately neighboring the objective system along the optical axes of the first pair of stereoscopic optical paths, and wherein the first optical refractive power of the first focusing lens and the second optical refractive power of the second focusing lens have different signs.