Tube for a surgical microscope

Patent metadata

Field	Value
Publication number	US-9798127-B2
Application number	US-201313952304-A
Country	US
Kind code	B2
Filing date	Jul 26, 2013
Priority date	Aug 19, 2009
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The invention relates to a tube for a surgical microscope. The tube has a base part, an intermediate part, which is pivotable about a rotational axis on the base part, and an ocular part which is pivotable about a rotational axis on the intermediate part. The imaging beam path is guided through the base part, the intermediate part and the pivotable ocular part. The tube has a tube lens system which transfers a parallel imaging beam paths into an intermediate image. The parallel imaging beam path enters via an opening in a connecting piece of the base part. The tube has a first displaceable mirror element which can be moved about the rotational axis on the base part. The tube lens system is a telesystem which has a lens unit having positive refractive power and a lens unit having negative refractive power.

First claim

What is claimed is:

1. A tube for a surgical microscope comprising:
a base part;
an intermediate part pivotable on said base part about a first rotational axis;
an ocular part pivotable on said intermediate part about a second rotational axis;
said base part, said intermediate part and said ocular part conjointly defining an imaging beam path passing therethrough;
said base part having a base part housing and said intermediate part having an intermediate part housing;
said intermediate part housing having a convex-shaped housing section at said second rotational axis;
said intermediate part being pivotably movable on said base part between a folded position and an unfolded position; and,
said base part housing including a housing section having a concave outer contour accommodating said convex-shaped housing section of said intermediate part housing therein when said intermediate part is in said folded position causing said intermediate part housing to be pivoted tightly against said base part housing.

2. The tube of claim 1 , further comprising:
a tube lens system arranged in said imaging beam path and including a first lens unit having a positive refractive power and a second lens unit having a negative refractive power; and,
said lens unit having said negative refractive power being mounted in said ocular part.

3. The tube of claim 2 , wherein said ocular part has a first section hinged to said intermediate part and a second section accommodated on a rotational joint pivotable about an optical axis of said imaging beam path; and, said second section has a receptacle for an ocular.

4. The tube of claim 3 , further comprising a Porro system for image reversal being mounted in said second section.

5. The tube of claim 4 , further comprising:
a first displaceable mirror movable about said first rotational axis on said base part;
a second displaceable mirror movable about said second rotational axis on said intermediate part;
said first displaceable mirror directing said imaging beam path entering via a connecting piece to said second displaceable mirror;
said first displaceable mirror and said second displaceable mirror being disposed in said imaging beam path between said first lens unit and said second lens unit; and,
said second lens unit being disposed between said second displaceable mirror and said Porro system for image reversal.

6. The tube of claim 3 , further comprising a drive for pivoting said second section.

7. The tube of claim 1 , further comprising:
said base part having a connecting piece defining an opening through which said imaging beam path enters;
a tube lens system arranged in said imaging beam path and including a first lens unit having a positive refractive power and a second lens unit having a negative refractive power; and,
an afocal magnification system disposed between said first lens unit and said opening in said connecting piece.

8. The tube of claim 7 , wherein said afocal magnification system is adjustable via a Galilei changer.

9. The tube of claim 7 , further comprising a glass block disposed between said first lens unit and said opening in said connecting piece.

10. The tube of claim 7 , further comprising a beam splitter disposed between said first lens unit and said opening in said connecting piece.

11. The tube of claim 7 , wherein said connecting piece is a rotational joint defining a third rotational axis parallel to an optical axis of said imaging beam path.

Assignees

• Zeiss Carl Meditec Ag

Inventors

• Luecke Christian
• Gaertner Hartmut
• Mueller Andre
• Schneider Martin
• Abele Alfons
• Kolster Nadine
• Holzmann Dirk
• Robra Wolfgang
• Rudisile Bernd
• Czerwinski Michael

Classifications

• A61B90/20

  Surgical microscopes characterised by non-optical aspects · CPC title

• G02B21/04

  involving mirrors · CPC title

• G02B21/22

  Stereoscopic arrangements · CPC title

• G02B21/02 Primary

  Objectives · CPC title

• G02B21/00

  Microscopes · CPC title