| 摘要 |
A medical optical observation instrument including an illumination system, which provides an illumination beam path for illuminating an observation object with illumination light, an observation system, which provides an observation beam path for observing the observation object and at least one camera for recording a digital image of the observation object, and a device for contrasting polarization-rotating tissue in the observation object. The device for contrasting polarization-rotating tissue in the observation object includes at least one illumination apparatus, arranged in the illumination system, including a polarization portion, at least one linear analyzer, arranged in the observation system and rotatable about the optical axis of the observation beam path, an image processing apparatus connected to the at least one camera, and an optimization apparatus connected to the image processing apparatus and to the at least one rotatable linear analyzer and the polarization portion. |
| 主权项 |
1. A medical optical observation instrument (2, 58, 73), comprising
an illumination system, which comprises an illumination beam path (42) for illuminating an observation object (3) with illumination light, an observation system, which comprises an observation beam path (9A, 9B) for producing an image of the observation object (3) with the aid of observation light emanating from the observation object (3) and at least one camera (21A, 21B), to which observation light is fed for recording a digital image of the observation object (3), and a device (53) for contrasting polarization-rotating tissue in the observation object (3), which device is connected to the at least one camera (21A, 21B) for receiving the digital image of the observation object (3), wherein the device (53) for contrasting polarization-rotating tissue in the observation object (3) comprises: at least one illumination apparatus, arranged in the illumination system, comprising a polarization portion (47, 69), which is suitable for producing illumination light with a linear polarization that is adjustable in the plane perpendicular to the optical axis of the illumination beam path (42, 70), at least one linear analyzer (40A, 40B), arranged in the observation system and rotatable about the optical axis of the observation beam path (9A, 9B), for determining the polarization direction of the observation light, an image processing apparatus (55) connected to the at least one camera (21A, 21B) for receiving the digital image of the observation object (3), which image processing apparatus establishes and outputs an image contrast value representing the image contrast in the digital image of the observation object, and an optimization apparatus (57) connected to the image processing apparatus (55) for receiving the image contrast value and connected to the at least one rotatable linear analyzer (40A, 40B) and the polarization portion (47, 69) for outputting actuation signals, which optimization apparatus maximizes the image contrast value by adapting the polarization direction of the illumination light and the polarization direction of the linear analyzer (40A, 40B) with the aid of the actuation signals. |
