Abstract: A method for testing an optical investigation system, with an imaging device, a video camera and a light source for optical investigation of an object including a reference surface with predetermined optical properties being illuminated with illuminating light from a light source. An image of the reference surface is recorded by the imaging device and the video camera. An operating condition of the video camera that prevails during the recording of the image is recorded. The functionality or another property of the investigation system is determined on the basis of the recorded operating condition.

Abstract: An endoscopic, exoscopic or microscopic apparatus for fluorescence diagnosis comprises a light source designed to emit light in a first spectral range and light in a second spectral range in a fluorescence mode The second spectral range is at least partly separate from the first spectral range. The light source has at least one first semiconductor illuminant which emits the light in the first spectral range in the fluorescence mode. The light source has at least one second semiconductor illuminant which emits the light in the second spectral range in the fluorescence mode. The apparatus comprises an open-loop or closed-loop control device, which keeps constant a preset ratio of a first intensity of the light in the first spectral range and a second intensity of the light in the second spectral range.

Abstract: A method for testing system with a light source and an imaging device for the optic investigation of an object in remitted light and fluorescent light, the imaging device positioned with respect to a reference surface within a hollow space of a test apparatus, the reference surface having an indicator area with a wavelength-dependent optical property, where the optical property essentially varies between a first focal point of a first product of a first predetermined illumination spectrum and a first predetermined transmission spectrum and a second focal point of a second product of a second predetermined illumination spectrum and a second predetermined transmission spectrum. The method includes illuminating the reference surface with illuminating light from the light source and determining which illumination spectrum and which transmission spectrum are present in an observation beam path on recording the image.

Abstract: A test apparatus for an optical investigation system, with an imaging device and a light source for optical investigation of an object in remitted light and/or fluorescent light includes a housing with a hollow space and an aperture for inserting a distal end of the imaging device into the hollow space, a reference surface with predetermined optical properties in the hollow space, at least either for remission of illuminating light directed onto the reference surface or for emission of fluorescent light, and a positioning device to hold the imaging device of the distal end of the imaging device at a predetermined position in relation to the reference surface.

Abstract: A method for testing an optical investigation system, with an imaging device, a video camera and a light source for optical investigation of an object, a reference surface with predetermined optical properties is illuminated with illuminating light from a light source. An image of the reference surface is recorded by the imaging device and the video camera. An operating condition of the video camera that prevails during the recording of the image is recorded. The functionality or another property of the investigation system is determined on the basis of the recorded operating condition.

Abstract: A method for testing an optic investigation system with a light source and an imaging device for the optic investigation of an object in remitted light and fluorescent light, where the light source is configured to generate illuminating light with a first predetermined illumination spectrum or with a second predetermined illumination spectrum, and where an observation beam path of the imaging device includes a first predetermined transmission spectrum or a second predetermined transmission spectrum, the imaging device is positioned with respect to a reference surface with an indicator area with a wavelength-dependent optical property, where the optical property essentially varies between a first focal point of a first product of a first predetermined illumination spectrum and the first predetermined transmission spectrum and a second focal point of a second product of the second predetermined illumination spectrum and the second predetermined transmission spectrum.

Abstract: A test apparatus for an optical investigation system, with an imaging device and a light source for optical investigation of an object in remitted light and/or fluorescent light includes a housing with a hollow space and an aperture for inserting a distal end of the imaging device into the hollow space, a reference surface with predetermined optical properties in the hollow space, at least either for remission of illuminating light directed onto the reference surface or for emission of fluorescent light, and a positioning device to hold the imaging device of the distal end of the imaging device at a predetermined position in relation to the reference surface.

Abstract: An apparatus for fluorescence diagnosis comprises an illumination system for illuminating a target area. The illumination system has a light source designed for generating white light and an illumination path. The apparatus further comprises an observation system for observing the target area, which has an observation path. The illumination system has a first illumination mode, in which an illumination spectral filter is arranged in the illumination path, which filter is transmitting in an excitation spectral range and substantially non-transmitting in the spectral range on the long-wavelength side outside of the excitation spectral range, and said illumination system has a second illumination mode, in which the illumination spectral filter is not arranged in the illumination path.

Abstract: A testing or setting device for a PDD or PDT system or for training on such a system, which includes a lighting system, is provided with a housing in which the PDD or PDT system can be at least partially accommodated. The device is characterized in that a tissue phantom is installed in the housing in such a way that the surface of the tissue phantom can be at least partially lit by the lighting system and observed by the observation system, and that the tissue phantom includes at least one luminescent area. A tissue phantom, appropriate for use in the invention's device, has at least one luminescent area and is characterized by the fact that it has at least one additional area, whose luminescent characteristics differ from those of the first luminescent area.

Abstract: A testing or setting device for a PDD or PDT system or for training on such a system, which includes a lighting system, is provided with a housing in which the PDD or PDT system can be at least partially accommodated. The device is characterized in that a tissue phantom is installed in the housing in such a way that the surface of the tissue phantom can be at least partially lit by the lighting system and observed by the observation system, and that the tissue phantom includes at least one luminescent area. A tissue phantom, appropriate for use in the invention's device, has at least one luminescent area and is characterized by the fact that it has at least one additional area, whose luminescent characteristics differ from those of the first luminescent area.

Abstract: In an imaging method and a system for determining a physical or chemical condition of tissue in a human or animal body using ultrasound at least one ultrasonic pulse in the diagnostic frequency and power range is injected into the tissue. The ultrasonic echo pulse reflected by the tissue is received and processed in ultrasonographic trace processing means. Further, at least one light beam is generated and split up into at least one measuring light beam and at least one reference light beam. The measuring light beam is injected along the same beam axis along which the ultrasonic pulse is injected into the tissue. The measuring light beam scattered back by the tissue is brought into an interference relationship with the reference light beam and is processed in optical image processing means.