Patent application number | Description | Published |
20100302550 | DEVICE AND METHOD FOR THE OPTICAL MEASUREMENT OF RELATIVE DISTANCES - An optical time domain coherence tomograph including an object beam path, a detection beam path and a detector unit. An interferometer unit, which has a first and a second beam path part having different optical path lengths, splits radiation and feeds it into the two beam path parts and superimposes it again after passage through the beam path parts and thus generates a dual beam, which has components which are axially offset to one another because of the differing optical path lengths of the two beam path parts. A scanning unit has a first adjuster and a second adjuster for adjusting the optical path length of the first and second beam path parts and the first and the second adjustment means adjusting the path length for scanning the object in coordination to one another under control by the control unit. | 12-02-2010 |
20110069279 | OPHTHALMOLOGIC BIOMETRIC OR IMAGE GENERATING SYSTEM AND METHOD FOR DETECTION AND EVALUATION OF MEASURED DATA - An ophthalmological biometric or image-producing system and method for detection and analysis of measurement data including a measurement arrangement with an illumination unit for illuminating the eye with at least one measurement beam, a signal detection unit for the detection of the light portions scattered or reflected back from the eye, a central control unit with an output unit, and a pattern generating unit which includes an optical scan unit, a control unit as well as a position sensor for measuring the realized deflections of the optical scan unit, whereby control unit, optical scan unit and position sensor can form a control circuit. Thereby, the position sensor, except for the connection within the possible control circuit, includes a connection to a unit of the measurement arrangement for optimizing measurement value logging or to the central control unit for correcting the biometric measurements or tomograms. | 03-24-2011 |
20110069366 | OPTICAL DEFLECTION DEVICE FOR SCANNING, OPHTHALMOLOGIC MEASUREMENT AND THERAPY SYSTEM - An optical deflection unit for targeted radiation, e.g., produced by laser or superluminescent diodes, in scanning, ophthalmological measuring and therapy systems, comprises a deflection mirror, a position sensor and a control unit, which form a control circuit for minimizing the deviation of the actual positions, detected by the position sensor, from the desired positions of the deflection mirror, whereby the optical deflection unit comprises a deflection mirror, oscillatingly movable by means of non-contacting electromagnetic drives around at least one rotation axis, and which is positioned in the direction of the, at least, one rotation axis between at least two bearings. The optical deflection unit is designed may also be used for beam guidance in high and ultrahigh vacuum installations, such as UV and EUV exposure installations for semiconductor lithography. | 03-24-2011 |
20110255054 | DEVICE FOR SWEPT-SOURCE OPTICAL COHERENCE DOMAIN REFLECTOMETRY - A device for swept-source optical coherence domain reflectometry (SS OCDR) on moveable samples, particularly human eyes, for obtaining A-scans, having a measuring range according to the sample length and having a laser light source which can be adjusted by a main wave number k | 10-20-2011 |
20110299038 | OPHTHALMOLOGICAL MEASURING SYSTEM AND METHOD FOR CALIBRATING AND/OR ADJUSTING THE SAME - An ophthalmological measuring system, for obtaining biometric data of an eye, provided with the necessary calibration and check devices for monitoring the functionality and the calibration status. The ophthalmological measuring system includes an illumination source for illuminating an eye with light and with a sensor for recording and analyzing back-scattered or reflected light components and a controller. At least one calibration and check system integrated in the ophthalmological measuring system for monitoring the functional and calibration status is provided. A device is also provided which houses the calibration and test structures and which reads off the individual physical data therefrom by an interface. The ophthalmological measuring system is in particular provided for determining biometrical data but can also be used for ophthalmological, dermatological or other devices which require calibration and/or functional checking at regular intervals. | 12-08-2011 |
20130120711 | OCT-BASED OPHTHALMOLOGICAL MEASURING SYSTEM - An ophthalmological measuring system for determining distances and/or for tomographic imaging of ocular structures, based on an OCT method. The measuring system includes a light source with a spectral centroid (λ), an interferometric measuring device, a scanner system, which in addition to the lateral deflection of the sample beam also has axial modulations with a frequency (f) in the sample arm, and a control and evaluation unit. The scanner performs a lateral, two-dimensional deflection of the sample beam with the aid of one or even two separate mirror elements and can in particular have axial modulation amplitudes z | 05-16-2013 |
20140268057 | DEVICE FOR SWEPT SOURCE OPTICAL COHERENCE DOMAIN REFLECTOMETRY - A device for swept-source optical coherence domain reflectometry (SS OCDR) on moveable samples, particularly human eyes, for obtaining A-scans, having a measuring range according to the sample length and having a laser light source which can be adjusted by a main wave number k | 09-18-2014 |
20150238078 | DEVICE FOR RELIABLY DETERMINING BIOMETRIC MEASUREMENT VARIABLES OF THE WHOLE EYE - A device for determining biometric variables of the eye, as are incorporated in the calculation of intraocular lenses including a multi-point keratometer and an OCT arrangement. The keratometer measurement points are illuminated telecentrically and detected telecentrically and the OCT arrangement is designed as a laterally scanning swept-source system with a detection region detecting the whole eye over the whole axial length thereof. The multi-point keratometer ensures that a sufficient number of keratometer points are available for measuring the corneal surface. By contrast, telecentricity ensures that the positioning inadequacies of the measuring instrument in relation to the eye to be measured do not lead to a local mismatch of the reflection points. The swept-source OCT scan detects the whole eye over the length thereof so that both anterior chamber structures and retina structures can be detected and a consistent whole eye image can be realized. | 08-27-2015 |