OCT system

1. An OCT system comprising:

a surgical microscope ( 21 ) having an observation beam path ( 23 ) and an object plane ( 24 );

an OCT light source ( 15 ) generating OCT light;

a changeover module ( 18 ) operatively coupled to receive said OCT light from said OCT light source;

a first OCT light guide ( 19 ) having an entry end operatively coupled to said changeover module and defining a first OCT beam path coupled into said observation beam path ( 23 );

a scanning device ( 29 ) assigned to the first OCT light guide ( 19 );

a second OCT light guide ( 20 ) having an entry end operatively coupled to said changeover module and defining a second OCT beam path coupled into a beam path of an optical device, a surgical instrument ( 22 ), or an OCT handpiece; and

an OCT evaluation unit,

wherein OCT light from the OCT light source ( 15 ) passes through the changeover module ( 18 ), said OCT light is passed to the entry end of the first OCT light guide ( 19 ) in a first state of the changeover module ( 18 ), said OCT light is passed to the entry end of the second OCT light guide ( 20 ) in a second state of the changeover module ( 18 ), and wherein said scanning device ( 29 ) is arranged between the changeover module ( 18 ) and said object plane.

2. The OCT system of claim 1 , wherein the changeover module ( 18 ) comprises a mechanical changeover switch ( 36 ) and a flexible light guide section ( 35 ), and the changeover switch ( 36 ) is designed to move one end of the flexible light guide section ( 35 ).

3. The OCT system of claim 1 , wherein a changeover between the first state of said changeover module ( 18 ) and the second state of said changeover module ( 18 ) is triggered by a control signal.

4. The OCT system of claim 3 , wherein the control signal is generated by a control unit ( 30 ) of the OCT system.

5. The OCT system of claim 1 , comprising a scanning device ( 44 ) assigned to the second OCT light guide ( 20 ) is arranged between the changeover module ( 18 ) and the object plane.

6. The OCT system of claim 5 , wherein a scanning device ( 29 , 44 ) is activated with the changeover between the first OCT light guide ( 19 ) and the second OCT light guide ( 20 ).

7. The OCT system of claim 1 , comprising a compensation unit ( 38 , 39 , 40 , 41 ) for compensating for path length differences, polarization differences and/or dispersion differences is assigned to the first OCT light guide ( 19 ) and/or the second OCT light guide ( 20 ).

8. The OCT system of claim 1 , wherein the system is designed to carry out a distance measurement between an exit end of the OCT light guide ( 19 , 20 ) and an object using the first OCT light guide ( 19 ) and/or the second OCT light guide ( 20 ).

9. The OCT system of claim 1 , wherein the changeover module ( 18 ) is designed to change over between more than two OCT light guides.

10. A method for carrying out an OCT measurement comprising the steps of:

generating OCT light from an OCT light source ( 15 );

passing said OCT light to an object via a changeover module ( 18 ), a first OCT light guide ( 19 ), a scanning device ( 29 ), and an observation beam path ( 23 ) of a surgical microscope ( 21 ); and

evaluating the light reflected by the object in an OCT evaluation unit ( 16 ); or

actuating the changeover module ( 18 ) to pass said OCT light from the OCT light source ( 15 ) to an object via a second OCT light guide ( 20 ) and a beam path of an optical device, a surgical instrument ( 22 ), or an OCT handpiece; and

evaluating the light reflected by the object in the OCT evaluation unit ( 16 ).

11. The method of claim 10 , wherein said step of actuating comprises passing said OCT light from the OCT light source ( 15 ) to a beam path of an optical device, wherein said optical device is a second surgical microscope ( 21 ) or an endoscope ( 43 ).

12. The OCT system of claim 1 , wherein said optical device is a second surgical microscope ( 21 ) or an endoscope ( 43 ).