Surgical microscope objective having an adjustable focal intercept

摘要

A surgical microscope objective has an adjustable focal intercept and defines an optical axis. The objective has an objective body wherein a negative member is fixed and in which a positive member can be displaced. The negative member faces toward the object and has a lateral edge. The positive member is held in a frame, which is guided on a first guiding section formed on the objective body so it can move in the direction of the optical axis using a first guiding part. The positive member is guided on a second guiding section, which is formed on the objective body, using a second guiding part connected to the frame of the positive member and movable between the lateral edge of the negative member and the objective body. The second guiding part is offset from the first guiding part in the direction of the optical axis facing the negative member.

主权项

1. A surgical microscope objective through which an object can be viewed, the surgical microscope objective defining an optical axis and having an adjustable focal intercept, the surgical microscope objective comprising:
an objective body; a negative member fixedly mounted in said objective body so as to be immovable with respect thereto; said negative member facing toward the object and having a lateral edge; a positive member mounted in said objective body so as to be displaceable therein; a frame for accommodating said positive member therein; a first guide section configured on said objective body; said frame having a first guide part guided on said first guide section to movably guide said frame with said positive member in the direction of said optical axis; a second guide section configured on said objective body; said frame having a second guide part disposed in spaced relationship to said first guide part and said second guide part being guided on said second guide section and said second guide part being movable between said lateral edge of said negative member and said objective body; said second guide part being arranged offset concentrically to said first guide part in the direction of said optical axis toward said negative member; and, said first guide part and said first guide section conjointly defining a first contact interface and said second guide part and said second guide section conjointly defining a second contact interface in spaced relationship to said first interface so as to counteract tilting of said positive member accommodated in said frame as said frame is moved along said optical axis relative to said objective body.