Abstract: An embodiment of an autofocus system (100, 400) is configured to receive a first signal (102a, 402a) corresponding to a first wavelength range and to receive a second signal (102b, 402b) corresponding to a second wavelength range. The autofocus system (100, 400) is further con-5 figured to determine an output signal (106, 406) comprising a focus setting information using the first signal (102a, 402a) and the second signal (102b, 402b).

Abstract: The invention relates to a medical device for the observation of a partly fluorescent object such as tissue comprising at least one fluorophore. The fluorophore absorbs light in at least one spectral excitation waveband and emits fluorescent light in at least one spectral emission waveband. In order to be able to observe also non-fluorescent regions in the tissue without complicated filter arrangement, the medical device according to the invention comprises at least one filter system which comprises, in a filter plane, comprises a filter area and a transmission window. The filter area comprises a band pass filter having at least one passband comprising the at least one excitation waveband. The transmission window has a passband which is wider than the passband of the filter area and is cross-shaped. The at least one filter system is configured to simultaneously receive light through the filter area and the entire transmission window.

Abstract: The invention relates to a medical device for the observation of a partly fluorescent object such as tissue comprising at least one fluorophore. The fluorophore absorbs light in at least one spectral excitation waveband and emits fluorescent light in at least one spectral emission waveband. In order to be able to observe also non-fluorescent regions in the tissue without complicated filter arrangement, the medical device according to the invention comprises at least one filter system which comprises, in a filter plane, comprises a filter area and a transmission window. The filter area comprises a band pass filter having at least one passband comprising the at least one excitation waveband. The transmission window has a passband which is wider than the passband of the filter area and is cross-shaped. The at least one filter system is configured to simultaneously receive light through the filter area and the entire transmission window.

Abstract: The invention relates to a medical device (1) for the observation of a partly fluorescent object (2) such as tissue (3) comprising at least one fluorophore (4). The fluorophore (4) absorbs light in at least one spectral excitation waveband (46) and emits fluorescent light in at least one spectral emission waveband (54). In order to be able to observe also non-fluorescent regions in the tissue (3) without complicated filter arrangement, the medical device (1) according to the invention comprises at least one filter system (16, 38) which comprises, in a filter plane (18), comprises a filter area (20) and a transmission window (22). The filter area (20) comprises a band pass filter (24) having at least one passband (44) comprising the at least one excitation waveband. The transmission window has a passband (48) which is wider than the passband (44) of the filter area (20). In particular, a filter layer (64) of the filter area (20) may be missing in the transmission window (20).

Abstract: The invention relates to a medical device (1) for the observation of a partly fluorescent object (2) such as tissue (3) comprising at least one fluorophore (4). The fluorophore (4) absorbs light in at least one spectral excitation waveband (46) and emits fluorescent light in at least one spectral emission waveband (54). In order to be able to observe also non-fluorescent regions in the tissue (3) without complicated filter arrangement, the medical device (1) according to the invention comprises at least one filter system (16, 38) which comprises, in a filter plane (18), comprises a filter area (20) and a transmission window (22). The filter area (20) comprises a band pass filter (24) having at least one passband (44) comprising the at least one excitation waveband. The transmission window has a passband (48) which is wider than the passband (44) of the filter area (20). In particular, a filter layer (64) of the filter area (20) may be missing in the transmission window (20).

Abstract: The invention relates to an arrangement for a stereomicroscope, having an illumination apparatus (20) whose light lies in a regulatable spectral region. This illumination apparatus can be freely supplemented by at least one further illumination apparatus (30) whose light lies in likewise regulatable spectral regions identical to or different therefrom.

Abstract: Method and device for determining one or more Z distances from an object surface to a reference plane, for example the primary plane of the primary objective of a microscope. By projecting an optical pattern onto an object, and subsequently detecting and computationally evaluating the object's reflection of this pattern by means of an image processing unit, it is possible to obtain relief-like imaging of the object and to identify the individual Z distances, irrespective of the object's contouring.

Abstract: The invention relates to a stereo microscope, which as a microscope used for operations comprises a viewing output for a surgeon (41) and at least one additional viewing output for an assistant (40). The stereo microscope is characterized by shutters (17a to 20b) for selectively screening off object information.

Abstract: The invention relates to a stereo microscope, which as a microscope used for operations comprises a viewing output for a surgeon (41) and at least one additional viewing output for an assistant (40). The stereo microscope is characterized by shutters (17a to 20b) for selectively screening off object information.

Abstract: The invention relates to an arrangement for a stereomicroscope, having an illumination apparatus (20) whose light lies in a regulatable spectral region. This illumination apparatus can be freely supplemented by at least one further illumination apparatus (30) whose light lies in likewise regulatable spectral regions identical to or different therefrom.

Abstract: The invention relates to a stereo microscope, which as a microscope used for operations comprises a viewing output for a surgeon (41) and at least one additional viewing output for an assistant (40). The stereo microscope is characterized by shutters (17a to 20b) for selectively screening off object information.

Abstract: The invention concerns a method and an apparatus for automatically focusing an optical device onto a specific and predetermined region of a specimen. The apparatus compares signals corresponding to the vertical distance between a principal objective and a region of a specimen which is in focus to the vertical distance between the principal objective and a target region on the specimen. If the comparison of the distances indicates that they are not the same, the system automatically alters the distance between the specimen and the principal objective so that the target region is properly focused.

Abstract: The invention relates to an optical observation instrument, for example a (stereo) operation microscope, having an additional shutter (4) in a main beam path (2b), arranged between an output-reflection beam splitter (3) and an observer eyepiece (5), for respectively connecting and disconnecting the observer (8a), without affecting the output-reflected signal.

Abstract: The invention relates to a stereo surgical microscope comprising at least one stop (12, 20) which can interrupt a main beampath in such a way that the user can only see one image when required, wherein the image is received via a reflected-in beam path (21).

Abstract: A microscope is disclosed for observing a magnified area. Fade-in means (32a) arranged in the path (1) of the rays of the microscope (82) reflect a thin focused beam of light (101) into the path (1) of rays. The beam of light (101) is deflected or modulated by deflecting means (102) to supply an image that can be recognised by an observer (100). The image may be projected onto the object (22) either directly or indirectly, for example through a diffusing screen (108a).

Abstract: A stereo microscope comprises: a main objective; a main observation output configured so that a left-hand beam path and a right-hand beam path are formed between the main objective and the main observation output; at least one input reflection beam splitter in each of the left-hand and right-hand beam paths configured to reflect additional information into its corresponding beam path; at least one output reflection beam splitter in at least one of the left-hand and right-hand beam paths; at least one first switchable shutter associated with at least one of the left-hand and right-hand beam paths, located in front of a corresponding input reflection beam splitter; and at least one second switchable shutter associated with at least one of the left-hand and right-hand beam paths, located between the main observation output and a corresponding output reflection beam splitter.

Abstract: Method and device for determining one or more Z distances from an object surface to a reference plane, for example the primary plane of the primary objective of a microscope. By projecting an optical pattern onto an object, and subsequently detecting and computationally evaluating the object's reflection of this pattern by means of an image processing unit, it is possible to obtain relief-like imaging of the object and to identify the individual Z distances, irrespective of the object's contouring.

Abstract: The invention concerns an imaging system comprising a first device (82) for acquiring image data for an object (93) using light, in particular a microscope, and a second device (94) for acquiring and displaying image data (in particular, of the kind not immediately visible to the eye) for the object (93) using (in particular invisible) radiation, preferably electromagnetic wave or particle radiation such as X-rays (X-ray or CT photographs), MRI or positron radiation. The system is also provided with a superimposition device (95) for superimposing the two sets of image data to form a single image which can be turned towards an observer. The optical parameters of the first device (82), e.g. the microscope and its image distortions, are incorporated in the image to be superimposed, thereby providing the observer with a dimensionally and geometrically accurate display of the two superimposed images.

Abstract: A stereo microscope comprises: a main objective; a main observation output configured so that a left-hand beam path and a right-hand beam path are formed between the main objective and the main observation output; at least one input reflection beam splitter in each of the left-hand and right-hand beam paths configured to reflect additional information into its corresponding beam path; at least one output reflection beam splitter in at least one of the left-hand and right-hand beam paths; at least one first switchable shutter associated with at least one of the left-hand and right-hand beam paths, located in front of a corresponding input reflection beam splitter; and at least one second switchable shutter associated with at least one of the left-hand and right-hand beam paths, located between the main observation output and a corresponding output reflection beam splitter.

Abstract: A microscope is disclosed for observing a magnified area. Fade-in means (32a) arranged in the path (1) of the rays of the microscope (82) reflect a thin focused beam of light (101) into the path (1) of rays. The beam of light (101) is deflected or modulated by deflecting means (102) to supply an image that can be recognised by an observer (100). The image may be projected onto the object (22) either directly or indirectly, for example through a diffusing screen (108a).