Abstract: The invention relates to a system for optical coherence tomography having an interferometer (20) which has a beam splitter (24), a reflector (25), an illumination arm (21), a specimen arm (22) and a reference arm (23). In order to increase the compactness of the system with at the same time a high image quality a specimen objective is provided in the specimen arm (22) of the interferometer (20) by means of which light is focussed into a focus lying in or on the specimen (1). Moreover, in the reference arm (23) of the interferometer (20) a reference objective is provided by means of which light is focussed onto the reflector (25). The optical properties of the specimen objective differ from the optical properties of the reference objective.

Abstract: The invention relates to a system and to a corresponding method for optical coherence tomography having an interferometer (10) which has a beam splitter (13), a first reflector (11) and a reflector (12) the optical distance (I) of which from the beam splitter (13) is changeable by a speed (v), and a detector (30) for collecting light which is reflected by a specimen (1) to be examined. In order to reduce the times required for the most reliable possible recording of interference patterns, provision is made such that the intensity of the light (14 or 4) injected into the interferometer (10) or emitted by the interferometer (10) is modulated with a modulation frequency (fM) which is not equal to the Doppler frequency (fD), the Doppler frequency (fD) being given by twice the ratio of the speed (v) of the change of the optical distance (I) between the reflector (12) and the beam splitter (13) to the average wavelength (?0) of the injected light (14): fM?fD=2·v/?0.

Abstract: The invention relates to a system and to a corresponding method for optical coherence tomography having an interferometer (10) for emitting light with which a specimen (1) is irradiated, the interferometer (10) comprising a beam splitter (13) and at least one reflector (12) the optical distance (I) of which from the beam splitter (13) can be changed by an optical path (L), and a detector (30) with a first number of detector elements arranged in a first area for collecting light which is reflected by the specimen (1). In order to be able to record images of a specimen, in particular in real time, more simply and quickly, the system is operated in a first mode in which light reflected by the specimen (1) is only collected by a second number of detector elements of the detector (30) and converted into corresponding detector signals, the second number of detector elements being smaller than the first number of detector elements.

Abstract: The invention relates to a system and to a corresponding method for optical coherence tomography having an interferometer (10) for emitting light with which a specimen (1) is irradiated, the interferometer (1) comprising a beam splitter (13) and at least one reflector (12) the optical distance (I) of which from the beam splitter (13) is changeable, a specimen objective by means of which light emitted by the interferometer (10) is focussed in a focus lying within the specimen (1), and a detector (30) for collecting light which is reflected by the specimen (1).

Abstract: The invention relates to a system and to a corresponding method for optical coherence tomography having a light source (15) for producing light (14), a first interferometer (10), a second interferometer (20) and an optical fibre (17) by means of which light emitted by the first interferometer (10) is conveyed to the second interferometer (20). For simpler and more efficient injection of the light emitted by the first interferometer (10) into the optical fibre (17) provision is made such that light is injected into the first interferometer (10) which has a first number of transversal modes, and the optical fibre (17) has at least one multi-mode fibre into which the light passing out of the first interferometer (10) is injected such that in the optical fibre (17) a second number of transversal modes is stimulated which is conveyed to the second interferometer (20), the second number of transversal modes being substantially greater than the first number of transversal modes.

Abstract: The invention relates to a system for optical coherence tomography having an interferometer (20), a detector (30) with a first number of detector elements for collecting light, and an optical fibre (29) with a second number of individual fibres for transmitting light from the interferometer (20) to the detector (30). In order to increase the compactness of the system with at the same time high image quality provision is made such that the detector elements have a first centre-centre distance and the individual fibres have a second centre-centre distance, the first centre-centre distance between the detector elements being greater than the second centre-centre distance between the individual fibres.

Abstract: An apparatus and associated method for reading out X-ray information of an X-ray picture stored in a phosphor layer includes: an irradiation device for irradiating the phosphor layer with a stimulating light beam to be moved along a line over the phosphor layer, and in so doing stimulating the phosphor layer into emitting emission light; a detector for collecting the emission light emitted from the storage phosphor layer and for converting the emission light collected into a detector signal S; a processing unit for deducing picture signal values B for pixels of the picture along the line from the detector signal S; and two or more sensors located at different reference positions to collect reference times when the light beam is located at the different reference positions. The processing unit deduces a number of detector signal values D from the detector signal S to deduce the picture signal values B between the two reference times.

Abstract: An apparatus and associated method for reading out X-ray information of an X-ray picture stored in a phosphor layer includes: an irradiation device for irradiating the phosphor layer with a stimulating light beam to be moved along a line over the phosphor layer, and in so doing stimulating the phosphor layer into emitting emission light; a detector for collecting the emission light emitted from the storage phosphor layer and for converting the emission light collected into a detector signal S; a processing unit for deducing picture signal values B for pixels of the picture along the line from the detector signal S; and two or more sensors located at different reference positions to collect reference times when the light beam is located at the different reference positions. The processing unit deduces a number of detector signal values D from the detector signal S to deduce the picture signal values B between the two reference times.

Abstract: A passive, stable optical system whose temperature is actively regulated is best suited to prevent color fringes in high-speed recorders for digital color images. Peltier elements (14) are well suited as actuators for active temperature regulation. They allow for temperature stabilization of both rapid heating and cooling of the components and housing (10) of an optical module (1) of a high-speed recorder. The overall design of the module (1) must be adapted for each individual application of the Peltier elements (14).