Carl Zeiss Meditec Ag

Carl Zeiss Meditec Gmbh

Carl Zeiss Ag

Carl Zeiss Microscopy Gmbh

Carl Zeiss Microimaging Gmbh

Carl Zeiss Jena Gmbh

Carl Zeiss Industrielle Messtechnik Gmbh

Carl Zeiss Surgical Gmbh

Carl Zeiss Spectroscopy Gmbh

Carl Zeiss Sports Optics Gmbh

Daniel Bublitz

Peter Westphal

Tobias Schmitt-Manderbach

Thomas Mohr

Matthew J Everett

Michael Kempe

Yue Qiu

Csaba Farkas

Manfred Dick

Martin Hacker

Christoph Nieten

Roland Bergner

Uwe Mohrholz

Enrico Geissler

Tobias Bühren

Gerhard Krampert

Stefan Richter

Rico Fuchs

Johannes Kindt

Günter Rudolph

Lothar Müller

Karsten Lindig

Markus Seesselberg

Ingo Koschmieder

Martin Wiechmann

Christoph Kuebler

Matthias Hillenbrand

Reiner Mitzkus

Peter Klopfleisch

Tobias Breuninger

Matthias Burkhardt

Martin Kühner

Norbert Kerwien

Michael Trost

Lars Omlor

Beate Böhme

Roman Kleindienst

Kai Wicker

Detlef Biernat

Dieter Graefe

Robert Pomraenke

Egon Luther

Burkhard Wagner

Rudolf Murai Von Bünau

Andrea Berner

Artur Högele

Frank Teige

Michael Güntzschel

Wibke Hellmich

Jörg Meissner

Andreas Brodschelm

Thomas K Fitzmorris

Thomas Nobis

Alexander Pesch

Tobias Schmitt-manderbach

Joachim Winter

Steffen Wagner

Enrico Geißler

Tobias BÜHREN

Dieter Gräfe

A measurement device for spectroscopic constituent analysis includes a control unit, a light source, a sample holder arranged in the beam path of the light source, and a spectral measurement module. The measurement module comprises at least one photosensor with organic photodiodes arranged on a substrate and a temperature sensor arranged at the photosensor. During a sample measurement, a method using the measurement device comprises: detecting an actual temperature at the photosensor; pivoting-in a dark reference sample and measuring a dark reference value; pivoting-in a bright reference sample and measuring a bright reference value; measuring a spectral value of the sample and correcting the spectral value by means of a correction calculation by way of the control unit using the dark reference value, the bright reference value, the spectral value of the sample, the temperature and using values which were determined in a pre-calibration and stored in the control unit.

Method for pre-calibrating and correcting measurement errors of a spectroscopic measurement device, and measurement device

The proposed combination device combines any tonometric metrology with a drug application to administer glaucoma medication on an eye. Several technical concepts are proposed and exemplary embodiments for rebound tonometry and air-puff tonometry are shown. However other methods such as optical coherence elastography (OCE) could also be used. The Solutions provide home care tonometry offerings which host the capability to administer glaucoma medication.

Combination device for tonometrical measuring and drug application on an eye

An optical system with an entrance pupil, has a first aperture diameter, an exit pupil and a reflective or transmissive filter element spaced at a distance from the entrance pupil, which is designed and arranged such that a second diameter is illuminated on the filter element by a beam passing through the entrance pupil and spreading divergently from this. The second diameter corresponds to n times the first aperture diameter, and n is a number greater than 1, as a result of which the local angular spectrum at each point on the filter element is n times smaller in comparison to the entrance pupil. The filter element selectively reflects or transmits to the exit pupil at each point only a predetermined spectral range. An optical imaging unit comprising the filter element is provided, which images the entrance pupil onto the exit pupil.

Optical system with a filter element

A method for measuring the surface topography of an object including the following steps: a) providing source radiation and dividing the source radiation into illumination radiation and reference radiation, b) illuminating the surface of the object with illumination radiation in a planar illumination field, the surface of the object being illuminated simultaneously with more than one spatial radiation mode and the radiation modes of the illumination being spatially and temporally coherent, but with a fixed phase difference from one another, and c) overlaying the reference radiation on illumination radiation back-scattered at the surface of the object, and detecting an interference signal of the overlaid radiation with a detector. Steps a) to c) are carried out for at least two different, fixed wavelengths. The surface topography of the object is determined by means of digital holography.

Method and system for measuring a surface topography of an object

An illumination system for producing a spatially distributed illumination pattern for measuring the cornea of an eye and, in particular, for determining the topography of the eye. In so doing, the system facilitates distance-independent measurements. The illumination system includes an illumination unit, an optical element for collimating the illumination light and a unit for producing a spatially distributed illumination pattern in the form of a fraxicon. In particular, the illumination unit includes a plurality of illumination modules which are arranged such that each illumination module illuminates part of the fraxicon, and consequently a full-area illumination is facilitated. The system for producing a spatially distributed illumination pattern serves to determine the topography of the cornea of an eye. Here, the system is designed as a compact module, and so it can be easily combined with other measurement systems, without interfering with the beam paths thereof.

Illuminating system for determining the topography of the cornea of an eye

Systems and methods for Broad Line Fundus Imaging (BLFI), an imaging approach that is a hybrid between confocal and widefield imaging systems, are presented. These systems and methods are focused on improving the quality and signal of broad line fundus images or imaging methods to create high contrast and high resolution fundus images. Embodiments related to improved pupil splitting, artifact removal, reflex minimization, adaptable field of view, instrument alignment and illumination details are considered.

Systems and methods for broad line fundus imaging

A-confocal, interferometric measuring arrangement, a spatially resolving detector, apparatuses for positioning purposes and an evaluation unit. A beam splitter serves to output couple and image on the spatially resolving detector some of the light signal reflected by the cornea, upstream of which detector a reference light source with a delay line and a beam splitter are arranged in order to realize a superposition of the part of the light signal reflected by the cornea, to be imaged on the spatially resolving detector with a reference signal. The evaluation unit is determines the topography of the cornea from the simultaneously recorded signals of the interferometric measuring arrangement and the spatially resolving detector. The proposed solution combines a confocal FD OCT method with elements of imaging holoscopy and can thereby interferometrically measure the topography of the cornea with the necessary accuracy.

Method and arrangement for high-resolution topography of the cornea of an eye

The invention relates to a method for examining an eye of a patient by the patient themselves by means of an ophthalmological apparatus, said apparatus having front optics and an apparatus pupil. According to said method, the patient positions the ophthalmological apparatus relative to the eye, a measure of the deviation of the pupil of the eye from the apparatus pupil is determined, and a pupil correction signal is produced depending on the measure of the deviation, said pupil correction signal specifying a direction and/or a degree of the deviation and being output to the patient. The patient can use the pupil correction signal for repositioning in relation to the ophthalmological apparatus with a smaller deviation.

Method for self-examination of an eye and ophthalmological self-examination apparatus

A method for holoscopic, optical coherence tomography for an object, wherein the method includes providing source radiation and splitting the source radiation into illumination radiation and reference radiation, illuminating an illumination field on the object with illumination radiation, said illumination field having an areal extent transverse to the direction of incidence, collecting illumination radiation scattered back from the object as measurement radiation, separating the measurement radiation collected from the object from the illumination radiation, and overlaying the measurement radiation with reference radiation and detecting an interference signal of the overlaid radiations with at least one areal detector with a two-dimensional extent, wherein the object in the illumination field is simultaneously illuminated by more than one spatial radiation mode, wherein the radiation modes of the illumination in the illumination field are spatially and temporally coherent with one another but have a fixed phase difference from one another.

Holoscopic, optical coherence tomography

Methods and apparatuses for fundus imaging are presented that use sequential selective illumination patterns to suppress unwanted reflections, scattering and haze from various optical components of a fundus-viewing instrument. This is particularly the case with those unwanted reflections produced by the objective lens contained within said instrument.

Method and apparatus for reducing scattered light in broad-line fundus imaging

An optical coherence tomograph includes a wavelength tunable illuminating device, an illumination and measurement beam path with a dividing element and a scanner and a front optical unit and a reference beam path, a detection beam path and a flat panel detector. A beam splitter conducts the separated measurement radiation to the detection beam path and an optical element acts only on the illumination radiation. The optical element sets the numerical aperture of the illumination of the illumination field in the eye. An optical element acts only on the measurement radiation and sets the numerical aperture with which measurement radiation is collected in the eye. An aperture is arranged in front of the flat panel detector in an intermediate image plane and defines the size of an object field. The flat panel detector has a spatial resolution of 4 to 100 pixels in a direction.

Optical coherence tomography for performing measurements on the retina

Systems and methods for localizing intraocular lens and/or existing refractive index patterns, to laser write-patterns, and to refractive index patterns in order to modify the refractive index by application of femtosecond laser pulses. OCT-based confocal detection and sectional image systems are provided for localization purposes, the systems being particularly suitable for the detection of phase patterns in addition to the localization of the IOL. With respect to laser write-patterns, the modification of existing refractive index patterns in the IOL is carried out by destroying existing structures or supplementing existing refractive index patterns.

Postoperative modification of an intraocular lens

An optical coherence tomograph that provides wavelength tunable source radiation and an illumination and measurement beam path, a dividing element that divides source radiation into illumination radiation and reference radiation, and collects measurement radiation. The illumination and measurement beam path has scanner. A detection beam path receives measurement radiation and reference radiation and conducts them onto at least one flat panel detector in a superposed manner. A beam splitter separates the measurement radiation from the illumination radiation. The beam splitter conducts the separated measurement radiation to the detection beam path and sets the numerical aperture of the illumination of the illumination field in the eye. An optical element sets the numerical aperture with which the measurement radiation is collected in the eye and a multi-perforated aperture defines the size of an object field and a number of object spots, from which the measurement radiation reaches the flat panel detector.

Optical coherence tomography for measurement on the retina

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Rausdorf, Germany

Daniel Bublitz