Abstract: An apparatus for treatment of an eye comprises a source of pulsed laser radiation, and a control device for controlling a focus of the laser radiation to generate an incision figure. The incision figure defines a corneal flap, a first auxiliary channel and a second auxiliary channel. The corneal flap is connected to adjoining corneal tissue in a hinge region, and has a flap underside parted-off from adjoining corneal tissue by a bed incision. The first auxiliary channel extends from the hinge region to an outer surface of the eye and is adapted to remove gases that develop during the generation of the bed incision. The second auxiliary channel extends along an edge of the bed incision, is connected to the first auxiliary channel, and extends beyond the hinge region. The control device is configured to generate the second auxiliary channel prior to the bed incision.

Abstract: In certain embodiments, a system (10) comprises a laser source (20), one or more optical elements (24), a monitoring device (28), and a control computer (30). The laser source (20) emits one or more laser pulses. The optical elements (24) change a pulse length of the laser pulses, and the monitoring device (28) measures the pulse length of the laser pulses to detect the change in the pulse length. The control computer (30) receives the measured pulse length from the monitoring device (28), determines one or more laser parameters that compensate for the change in the pulse length, and controls the laser source (20) according to the laser parameters.

Abstract: A method and system for instantaneous time domain optical coherence tomography (iTD-OCT) provides instantaneous optical depth profiles in an axial direction to a sample having scattering properties or that is at least partially reflective. An iTD-OCT instrument includes a spectroscopic detector having an internal optical axis and an array of detector pixels. A reference beam having a fixed optical path length is superpositioned along the optical axis with a measurement beam that includes back-scattered photons from the sample. The detector pixels capture a time domain interference pattern arising within the spectroscopic detector due to optical path length differences between photons from the reference beam and photons from the measurement beam. The iTD-OCT instrument may be implemented as a robust solid-state device with no moving parts.

Abstract: In an embodiment, a scanning optical system comprises first and second optical sources and a deflector device. The first and second optical sources provide first and second beams, respectively, of optical radiation. The deflector device is disposed to receive and deflect the first and second beams, and is configured for a scanning operation on a beam of radiation traversing the deflector device. The first beam is incident on the deflector device with a first orientation and the second beam is incident on the deflector device with a second orientation that is different from the first orientation.

Abstract: In a process for optical coherence tomography a plurality of first OCT slice images, in each first slice image representing a different slice of an object, are recorded. Subsequently a reference figure that is representative of the three-dimensional contour of at least one structural feature of the object in a given three-dimensional coordinate system is ascertained by feature recognition of the at least one structural feature in the first slice images. Then a plurality of second OCT slice images, each second slice image representing a different slice of the object, are recorded. At least a fraction of the second slice images are displaced in the coordinate system until each second slice image is in feature overlap with the reference figure. Lastly, a set of three-dimensional OCT image data is generated at least from the feature-overlapped second slice images.

Abstract: An ophthalmic apparatus includes a resting member configured to provide rest for a human patient, and an ophthalmic device configured to perform one or more procedures with respect to an eye of the patient resting on the resting member, where the one or more procedures include at least one of an eye-surgical, therapeutic and diagnostic procedure. The apparatus also includes a user interface device configured to receive log-in data from a user, and a controller configured to access stored user profile data based on the log-in data and configure one or more configurable components of the apparatus in accordance with the accessed user profile data.

Abstract: An optical coherence tomography device comprises a light generator, a dispersive medium, an optical coupler and a detector. The light generator is adapted to generate a series of input pulses of coherent light, each input pulse having an input pulse width. The dispersive medium has an input that is optically coupled to the light generator and an output for output pulses. The dispersive medium is adapted to stretch the input pulse width to an output pulse width of each of the output pulses by chromatic dispersion. The optical coupler is adapted to couple the output pulses into a reference arm and a sample arm. The optical coupler is further adapted to superimpose light returning from the reference arm and the sample arm. The detector is adapted to detect an intensity of interference of the superimposed light with a temporal resolution of a fraction of the output pulse width.

Abstract: A technique for optical coherence tomography is provided. As to a device aspect of the technique, an imaging device comprises a base defining a rotation axis, a scanning and focusing assembly mounted to the base for rotation about the rotation axis, and a drive unit for rotationally driving the scanning and focusing assembly about the rotation axis. The scanning and focusing assembly includes a focusing device for focusing a beam of imaging radiation to produce a focused beam of imaging radiation having a focus, a scanning member for scanning the beam of imaging radiation, and a controller coupled to the drive unit and the scanning member and configured to control the scanning member to cause movement of the focus along a predetermined trajectory with respect to the scanning and focusing assembly.

Abstract: The present invention relates to a laser apparatus, system, and method for determining a depth of a focus point of a laser beam. An interface device is coupleable to the laser apparatus and has an applanation element comprising a front surface and a back surface. A laser beam having a predefined shape is focussed through the applanation element at a focus point. A superimposed image of a spurious reflection, which is reflected from the front surface of the applanation element, with a standard reflection, which is reflected from the back surface of the applanation element, is detected. The spurious reflection is then filtered out of the superimposed image. Based on the remaining standard reflection, the depth of the focus point of the laser beam can be determined.

Abstract: The invention relates to an eye-surgical laser apparatus, a use of said apparatus, and to a method for scanning the corneal tissue of an eye before or during eye surgery. The apparatus comprises optics that are adapted to focus a laser beam at a focus within a corneal tissue of an eye, and a detection element adapted to detect light that is formed, at the focus, as a frequency multiple and backscattered or forward emitted. Image information about the inner corneal tissue is then produced from the detected light.

Abstract: Embodiments of the invention provide a method and apparatus for laser-processing a material. In the embodiments, a diffraction-limited beam of pulsed laser radiation is diffracted by a diffraction device to generate a diffracted beam. The diffracted beam is subsequently focused onto the material and is controlled in time and space to irradiate the material at a target position with radiation from a set of radiation pulses of the diffracted beam so that each radiation pulse from the set of radiation pulses is incident at the target position with a cross-sectional portion of the diffracted beam, the cross-sectional portion including a local intensity maximum of the diffracted beam. The beam cross-sectional portions of at least a subset of the pulses of the set include each a different local intensity maximum. In this way, a multi-pulse application for generating a photo-disruption at a target location of the material can be implemented.

Abstract: A system for surgical treatment of an eye includes a laser arrangement that is adapted to emit light with a wavelength and repetition-rate suitable for surgical treatment of the eye. The system further includes a temperature-registration device that is adapted to register the temperature of an object that is to be subjected to the light of the laser arrangement.

Abstract: According to an exemplary embodiment, a device (12) for assisting in the preparation of an operation on the human eye (14) for the purpose of generating a corneal flap by means of a microkeratome system (10) includes: an input interface arrangement (50) that permits at least the input of data relating to a set value of at least one flap parameter and also to at least one patient-related parameter; a computer (46) that has been set up to access a stored data collection (44) of several surgical data records, each of which includes a post-operative actual value of at least one flap parameter, a value for at least one patient-related parameter and configuration data of the microkeratome system, the computer (46) having been set up to ascertain, on the basis of the data collection (44) in a manner depending on the input data, configuration information that represents a proposed configuration of the microkeratome system (10); an output interface arrangement (48) for outputting the configuration information.

Abstract: Proposed is an apparatus for assistance in the implantation of a corneal prosthesis in a human eye. The apparatus comprises a laser device for providing focussed, pulsed laser radiation, and a control program for the laser device. The control program is designed, to create an incision figure in the tissue of the eye by means of the laser radiation, this incision figure allowing the corneal prosthesis to be inserted. The incision figure in this case comprises a bed incision located entirely in the depth of the corneal material and an annular incision, which, within the circumferential line of the bed incision, extends from the latter, along its entire annular circumference, as far as the corneal anterior surface. The incision figure further may comprise an auxiliary incision, which extends from a location of the eye surface outside the circumferential line of the bed incision as far the bed incision.

Abstract: In certain embodiments, a device for optical coherence tomography (OCT) includes a signal detection device and a computer arrangement. The signal detection device is designed to detect an interference signal (G(?)) for an object to be imaged in an optical frequency range (?). The computer arrangement is designed to determine intermediate signals (G1(k), G2(k)) in a spatial frequency range (k) from the intermediate interference signal (G(?)), whereby each of the intermediate signals (G1(k), G2(k)) is dispersion-compensated for a different depth (z1, z2) of the object. A locally resolved image signal (FFT1, FFT2) is determined for each of the intermediate signals (G1(k), G2(k)) by applying a Fourier transformation to the particular intermediate signal (G1(k), G2(k)). A tomography signal (G(z)) is determined from the image signals (FFT1, FFT2).

Abstract: A system for refractive ophthalmological surgery, in particular LASIK, has—in addition to the ablation laser and, where appropriate, further optical guidance means (18, 30)—a device (34) for optical coherence tomography as an integrated component, in order to make available results of measurement acquired with this device either for the purpose of representation on a display device and/or for the purpose of control of the ablation.

Abstract: Method for determining deviations between coordinate systems of different technical systems, comprising the steps of determining a coordinate position of a reference feature of a test object in the coordinate system (u,v) of a first of the technical systems, the attachment of at least one test feature to the test object, with the test feature being attached in the coordinate system of a second of the technical systems at a coordinate position that is determined in dependence on the determined coordinate position of the reference feature, the determination of a coordinate position of at least one test feature and/or at least one feature derived from it in the coordinate system (u,v) of the first technical system, and determination of deviations between the coordinate systems of the first and second technical system, at least on the basis of: (a) the determined coordinate position of at least one test feature and/or of at least one feature derived from it in the coordinate system (u,v) of the first technical sy

Abstract: A test device to calibrate the pulse energy of a laser device which provides pulsed laser radiation includes a measuring head with multiple measuring probes. The test device is used in such a way that by means of the laser radiation, multiple test ablations are made on a test surface, in an arrangement corresponding to the relative spatial arrangement of the measuring probes, and the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head.

Abstract: An ophthalmic apparatus for laser eye surgery comprising a command recognition unit configured for detecting and recognizing a gesture command and/or voice command of an operator of the ophthalmic apparatus, at least one controlled unit configured for receiving a control signal and configured for changing a state based on the received control signal, and a controller configured for generating a control signal and transmitting the control signal to the at least one controlled unit based on the recognized gesture command and/or voice command.

Abstract: An apparatus for operating a laser materials processing and measurement device with a controllable laser for generating a laser beam and beam control means for adjusting the focus zone of a controlled portion of the laser beam in three spatial directions comprises an interface for operating a bidirectional data transfer link with the laser and the beam control means, and user control means for inputting and displaying control commands or control command sequences and for monitoring and/or controlling operation and/or the operating state of the device. So that all the components of the apparatus may also be tested with regard to all functionalities, if the laser materials processing and measurement device is not operationally ready and/or not connected to the interface, according to the invention the apparatus comprises simulation means for simulating operation of the device and/or of the user control means.