Surgical microscope objective having an adjustable focal intercept

An interchangeable surgical microscope objective through which an object can be viewed, the interchangeable surgical microscope objective defining an optical axis and having an adjustable focal intercept, the interchangeable surgical microscope objective being adaptable for use with a surgical microscope having a base body and 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;
• said objective body and said base body conjointly defining an engaging contact interface to facilitate the insertion and removal of said interchangeable surgical microscope objective into and from said surgical microscope;
• 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.

A surgical microscope for viewing an object, the surgical microscope defining an optical axis and comprising:

• a base body;
• a surgical microscope objective mounted in said base body along said optical axis;
• said surgical microscope objective including:
• 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.