Abstract: A device for carrying out fluorescence lifetime microscopy of an eye includes a probe light source for sending a probe beam into the eye as well as a fluorescence detector for measuring time-resolved fluorescence data using fluorescent light returning from the eye. The device further includes an interferometer for sending a measurement beam into the eye and carrying out optical coherence tomography on light reflected from structures within the eye. A beam splitter is provided to collinearly combine the probe beam and a measurement beam. This device can be used to combine optical coherence tomography (OCT) and fluorescence lifetime data for obtaining more descriptive results. The device is also equipped for correcting fluorescence lifetime data of a first structure of the eye by compensating for fluorescence contributions from a second structure of the eye.

Abstract: Data representing structures in an eye, in particular data for a cross-sectional. image, is recorded by generating a plurality of A-scans using swept-source OCT at different locations in the eye, each of which generates a plurality of reflection values for a plurality of points along a light trace. Combined values are then calculated from several reflection values at different locations in the eye. For improving data quality, a model of at one curved structure in the eye is fitted to the reflection values, and it is then used for identifying the points on the A-scans that are to be combined. This allows to project the data along a tangential direction of the curved structures for reducing noise and for obtaining improved resolution in the direction perpendicular to the structure.

Abstract: A method for measuring at least one parameter indicative of the optical transmission quality of the eye, such as information on absorptive or scattering structures that affect the propagation of light between the cornea and the retina and/or information on the imaging quality, e.g., the point-spread-function of the eye. The method includes recording a plurality of optical coherence tomography A-scans for different cornea locations xi, yi of the eye by an optical coherence tomography device and a scanner. For each A-scan, a reflection value at the retina of the eye is determined. The reflection values can then be combined, e.g., for displaying an image of the eye's transmission quality as a function of xi, yi or, by Fourier analysis, for determining the point spread function of the eye.

Abstract: The invention relates to an OCT system, comprising: an OCT light source for emitting OCT light into an object beam path and a reference beam path; and a detector for capturing an interference signal produced from the object beam path and the reference beam path. A wavelength-dependent beamsplitter is arranged in the OCT beam path such that a first spectral partial beam is guided along a longer path and a second spectral partial beam is guided along a shorter path. The invention further relates to a corresponding OCT method. Two measurement regions separated from each other can be sensed by means of the OCT system according to the invention.

Abstract: The invention relates to a method for performing a movement correction when measuring a human eye, in which the eye is scanned by a measurement beam in order to obtain a set of position values of an eye structure. Scanning extends over a measurement time interval, wherein the position values are each provided with a timestamp within the measurement time interval. A surface shape and a displacement function are determined, with the displacement function representing a movement pattern during the measurement time interval, and the surface shape and the displacement function being determined in such a way that the position values are approximated by the surface shape when the surface shape is moved according to the displacement function. Moreover, the invention relates to an associated measurement system.

Abstract: The invention relates to an OCT system with an OCT light source for emitting OCT light into an object beam path and a reference beam path. The system comprises a detector for detecting an interference signal produced by the object beam path and the reference beam path. A polarization-dependent delay element is arranged in the object beam path. The invention also relates to a corresponding OCT method. The invention allows the effects of parasitic reflections to be reduced.

Abstract: The invention relates to an OCT system with an OCT light source for emitting OCT light into an object beam path and a reference beam path. The system comprises a detector for detecting an interference signal produced by the object beam path and the reference beam path. A polarization-dependent delay element is arranged in the object beam path. The invention also relates to a corresponding OCT method. The invention allows the effects of parasitic reflections to be reduced.

Abstract: The invention relates to a method for performing a movement correction when measuring a human eye, in which the eye is scanned by a measurement beam in order to obtain a set of position values of an eye structure. Scanning extends over a measurement time interval, wherein the position values are each provided with a timestamp within the measurement time interval. A surface shape and a displacement function are determined, with the displacement function representing a movement pattern during the measurement time interval, and the surface shape and the displacement function being determined in such a way that the position values are approximated by the surface shape when the surface shape is moved according to the displacement function. Moreover, the invention relates to an associated measurement system.

Abstract: The invention relates to an OCT system, comprising: an OCT light source for emitting OCT light into an object beam path and a reference beam path; and a detector for capturing an interference signal produced from the object beam path and the reference beam path. A wavelength-dependent beamsplitter is arranged in the OCT beam path such that a first spectral partial beam is guided along a longer path and a second spectral partial beam is guided along a shorter path. The invention further relates to a corresponding OCT method. Two measurement regions separated from each other can be sensed by means of the OCT system according to the invention.

Abstract: The invention relates to an OCT system with an OCT light source for emitting OCT light into an object beam path and a reference beam path. The system comprises a detector for detecting an interference signal produced by the object beam path and the reference beam path. A polarization-dependent delay element is arranged in the object beam path. The invention also relates to a corresponding OCT method. The invention allows the effects of parasitic reflections to be reduced.

Abstract: The invention relates to an OCT system with an OCT light source for emitting OCT light into an object beam path and a reference beam path. The system comprises a detector for detecting an interference signal produced by the object beam path and the reference beam path. A polarization-dependent delay element is arranged in the object beam path. The invention also relates to a corresponding OCT method. The invention allows the effects of parasitic reflections to be reduced.

Abstract: In a method for calibrating an interferometer (100) having a beam path for a measuring beam (112), wherein at least one plane (320) that at least partially reflects the measuring beam (112) has been introduced into the beam path, and wherein a normal to a first plane (320) is inclined at a first angle to a measuring beam (112) incident on the first plane (320), the following steps are carried out: interferometric measurement of a first axial spacing of a first point on the first plane (320) with the measuring beam (112), and interferometric measurement of a second axial spacing of a second point on one of the at least one plane (320) with the measuring beam (112), wherein the second point is spaced apart from the first point.

Abstract: In a method for registering measurement points on a body, in particular on an eye, measurement points are registered along a trajectory on a surface of the body, in particular a curved surface of the body, for determining an axial length profile, by way of a measurement beam. Here, a minimum radius of curvature of the trajectory is at least 1/7, preferably at least ?, particularly preferably at least ? of a radius of a circumference of the surface.

Abstract: In a method for calibrating an interferometer (100) having a beam path for a measuring beam (112), wherein at least one plane (320) that at least partially reflects the measuring beam (112) has been introduced into the beam path, and wherein a normal to a first plane (320) is inclined at a first angle to a measuring beam (112) incident on the first plane (320), the following steps are carried out: interferometric measurement of a first axial spacing of a first point on the first plane (320) with the measuring beam (112), and interferometric measurement of a second axial spacing of a second point on one of the at least one plane (320) with the measuring beam (112), wherein the second point is spaced apart from the first point.

Abstract: In a method for calibrating an interferometer (100) having a beam path for a measuring beam (112), wherein at least one plane (320) that at least partially reflects the measuring beam (112) has been introduced into the beam path, and wherein a normal to a first plane (320) is inclined at a first angle to a measuring beam (112) incident on the first plane (320), the following steps are carried out: interferometric measurement of a first axial spacing of a first point on the first plane (320) with the measuring beam (112), and interferometric measurement of a second axial spacing of a second point on one of the at least one plane (320) with the measuring beam (112), wherein the second point is spaced apart from the first point.

Abstract: In a method for interferometrically capturing measurement points of a region of an eye, a plurality of measurement points are captured by a measurement beam along a trajectory, wherein the same trajectory is passed over by the measurement beam in the region during at least a first iteration and a second iteration. The trajectory of the first iteration is rotated through an angle and/or displaced by a distance in relation to the trajectory of the second iteration in order to obtain a more homogeneous measurement point distribution.

Abstract: In a method for interferometrically capturing measurement points of a region of an eye, a plurality of measurement points are captured by a measurement beam along a trajectory, wherein the same trajectory is passed over by the measurement beam in the region during at least a first iteration and a second iteration. The trajectory of the first iteration is rotated through an angle and/or displaced by a distance in relation to the trajectory of the second iteration in order to obtain a more homogeneous measurement point distribution.

Abstract: In a method for calibrating an interferometer (100) having a beam path for a measuring beam (112), wherein at least one plane (320) that at least partially reflects the measuring beam (112) has been introduced into the beam path, and wherein a normal to a first plane (320) is inclined at a first angle to a measuring beam (112) incident on the first plane (320), the following steps are carried out: interferometric measurement of a first axial spacing of a first point on the first plane (320) with the measuring beam (112), and interferometric measurement of a second axial spacing of a second point on one of the at least one plane (320) with the measuring beam (112), wherein the second point is spaced apart from the first point.

Abstract: An adapter (60) for an apparatus (50) for measuring a first property of an eye is attachable to the apparatus (50), wherein, when the adapter (60) is attached to the apparatus (50), a second additional property of the eye is measurable.

Abstract: In a method for registering measurement points on a body, in particular on an eye, measurement points are registered along a trajectory on a surface of the body, in particular a curved surface of the body, for determining an axial length profile, by way of a measurement beam. Here, a minimum radius of curvature of the trajectory is at least 1/7, preferably at least ?, particularly preferably at least ? of a radius of a circumference of the surface.