| CARL ZEISS AG Patent applications |
| Patent application number | Title | Published |
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| 20120092644 | EVALUATION DEVICE, MEASURING ARRANGEMENT AND METHOD FOR PATH LENGTH MEASUREMENT - An evaluation device, measuring arrangement and method for path length measurement. The evaluation device for path length measurement is configured to evaluate a measured signal which represents an intensity of a sequence of pulses of electromagnetic radiation as a function of time. The sequence of pulses has a repetition rate. The evaluation device is configured to determine a phase difference between a component of the measured signal, the component oscillating with a frequency, and a reference signal which oscillates with the frequency. For this purpose, the evaluation device generates, for example by frequency mixing, a first signal and a second signal which have another phase difference, such that the first signal and the second signal each oscillates with another frequency which is different from said frequency, and that the other phase difference has a predetermined relation to the phase difference. | 04-19-2012 |
| 20120086933 | EVALUATION DEVICE, MEASURING ARRANGEMENT AND METHOD FOR PATH LENGTH MEASUREMENT AND MEASURING SYSTEM AND METHOD FOR A COORDINATE MEASURING DEVICE AND COORDINATE MEASURING DEVICE - An evaluation device for path length measurement configured to evaluate a measured signal representing an intensity of a sequence of pulses of electromagnetic radiation, particularly a sequence of light pulses, as a function of time, after the sequence has traveled through a path length to be measured. The sequence of light pulses is generated with a repetition rate by a radiation source, particularly a light source. The evaluation device is configured to evaluate a first component of the measured signal, which oscillates with a first frequency, and a second component of the measured signal, which the second component oscillates with a second frequency that is greater than the first frequency. The first frequency may correspond to the repetition rate or a multiple of the repetition rate. The second frequency may correspond to another multiple of the repetition rate. | 04-12-2012 |
| 20120069351 | OPTICAL APPARTUS FOR NON-CONTACT MEASUREMENT OR TESTING OF A BODY SURFACE - An optical arrangement for the non-contact measurement or testing of properties of a solid's surface, such as curvature, shape, contour, roughness or alignment. An optical arrangement includes structure for establishing a gap between the solid's surface and a reference edge, structure for imaging the gap on a detector, and an analyzing system connected to the detector. The analyzing system is designed to determine gap widths lying adjacent to each other on the basis of the output signals of the detector, and to determine curvature, shape, contour or roughness of the solid's surface on the basis of the gap widths lying adjacent to each other. From the comparison of the images obtained from any two positions within a drilled hole, deductions can be made, among other things, about any tilt between the measuring object and the measuring system. | 03-22-2012 |
| 20120002295 | DISPLAY DEVICE COMPRISING MULTIFUNCTION GLASS, PRODUCTION METHOD, AND OPTICAL ELEMENT HAVING A FRESNEL STRUCTURE - A display device including a holding device that can be placed on the head of a user, an image generating module fixed to the holding device and generating an image, and a multifunction glass that is fixed to the holding device and has a coupling in area and a coupling out area. The image produced is coupled into the multifunction glass via the coupling in area, guided in the multifunction glass to the coupling in area, and extracted via the coupling out area, in such a way that the user can perceive the coupled out image superimposed on the surroundings when the holding device is placed on the head of the user. The coupling in area has a Fresnel structure causing a folding of the beam path when the image is injected into the multifunction glass, said structure having an imaging property. | 01-05-2012 |
| 20120002294 | BEAM COMBINER FOR USE IN A HEAD-MOUNTED DISPLAY DEVICE AND BEAM SPLITTER - A beam combiner for combining a first beam cluster with a second beam cluster that is not parallel to the first, to form a common beam cluster. The beam combiner includes a transparent body for the first beam cluster, which has a superimposition region that is encountered by the first beam cluster as it passes through the body. The superimposition region is split into a first section and a second section. Only the first section formed from interspaced reflective and/or refractive deflection elements causes a deflection of the second beam cluster by reflection and/or refraction, such that the first beam cluster forms the common beam cluster with the deflected second beam cluster once it has left the body. | 01-05-2012 |
| 20120001833 | DISPLAY DEVICE AND DISPLAY METHOD - A display device has a holding device wearable on a user's head and holding a multifunctional glass that comprises a first and second coupling-out section and a coupling-in section, an image generation module that generates and couples an image into the multifunctional glass through the coupling-in section to the first coupling-out section redirecting the image in the direction of the user such that the user can perceive the image in superimposition with the real environment, a control unit for the image generation module, and a detector which is connected to the control unit and which measures the intensity of ambient light coupled through the first coupling-out section to the second coupling-out section and coupled out of the multifunctional glass through the second coupling-out section. The control unit controls the brightness of the image of the image generation module, the brightness controlled according to the intensity measured by the detector. | 01-05-2012 |
| 20110176120 | PROJECTION SYSTEM - A projection system having a first tilting mirror matrix, a second tilting mirror matrix, and an imaging lens, which projects the first tilting mirror matrix onto the second tilting mirror matrix, wherein each tilting mirror matrix has multiple tilting mirrors, the tilting axes of which are positioned in a modulator surface plane. The imaging lens includes a first lens and an imaging mirror, and the imaging mirror forms an aperture stop of the imaging lens, wherein the aperture diaphragm includes an uneven angle of 90° together with the normal of the modulator surface of the first tilting mirror matrix without taking into account any optical path folds. | 07-21-2011 |
| 20110175953 | PROJECTOR AND METHOD FOR PROJECTING AN IMAGE - A projector, having an illumination modulator having multiple illumination pixels a projection lens projecting the light being modulated in a pixel-individual manner onto an image modulator having multiple image pixels to generate the image. A controller generates illumination control data for the illumination modulator and generates image control data for the image modulator. The illumination control data has either an on-value or an off-value The illumination control data (MS) is generated such that the on-value for each illumination pixel is associated with at least one image pixel that is to represent a brightness value within the image and an off-value for all other illumination pixels, with the exception that the illumination control data for at least one of the other illumination pixels that is at a distance by not more than one predetermined pixel number, has an on-value. | 07-21-2011 |
| 20110175926 | PROJECTOR AND METHOD FOR PROJECTING AN IMAGE - A projector having an illumination modulator to modulate the intensity of the light in a pixel-individual manner, a projection lens projecting the light being modulated in a pixel-individual manner onto an image modulator to generate the image to be projected such that each illumination pixel is associated with at least one image pixel. A controller which generates illumination control data and generates image control data for the image modulator. The illumination control data are generated such that they have an on-value for each illumination pixel that is associated with at least one image pixel intended to represent a brightness value in the image that exceeds a predetermined threshold value according to the image data, said on-value selected such that each illumination pixel being associated with at least one image pixel intended to represent a brightness value according to the image data that exceeds a predetermined threshold value and falls short of a predetermined maximum value, is also at least temporarily switched to the second state during periods when the at least one associated image pixel is switched to the second state. | 07-21-2011 |
| 20110105868 | METHOD AND DEVICE FOR MEASURING DISSOLVED SUBSTANCES IN HUMAN OR ANIMAL INTRAOCULAR FLUID - The present invention relates to the non-invasive optical measurement of glucose and other dissolved substances in human or animal intraocular fluid. For this purpose, a method and devices for carrying out the method are proposed. The method according to the invention takes advantage of the fact that the wave dependence of optical activity is fundamentally different from corneal birefringence. The optical activity of substances dissolved in the intraocular fluid, such as glucose, lactate, ascorbic acid or amino acids, is scaled as a first approximation with the reciprocal value of the wavelength square. Upon closer review, higher orders must be taken into consideration and effectively an exponent varying from a value of 2 may occur. For glucose, the exponent shall be denoted as 2+x | 05-05-2011 |
| 20110026118 | DIFFRACTIVE OPTICAL ELEMENT AND USE OF AN OPTICAL ADHESIVE FOR PRODUCING THE SAME - A diffractive optical element is provided, which comprises a first layer ( | 02-03-2011 |
| 20100321277 | HMD SYSTEM AND DISPLAY METHOD FOR AN HMD SYSTEM - An HMD system including an image data module, which includes an enabling unit and a data unit, as well as a display module that can be mounted on the head of a user and is connected to the image data module via a bidirectional communication channel. The enabling unit transmits an enabling request to the display module via the communication channel, and the display module transmits an enabling code via the communication channel in response to the enabling request. The enabling unit verifies the validity of the enabling code, prevents transmission of image data from the data unit to the display module if an invalid enabling code is present and allows transmission of image data from the data unit to the display module if a valid enabling code is present. The display module presents an image based on the transmitted image data to the user wearing the display module on his head. | 12-23-2010 |
| 20100294749 | LASER BEAM MACHINING - A method for laser beam machining of a workpiece in which a laser beam is focused by an objective, into or onto the workpiece having a boundary surface, to produce a machining effect by a two-photon process, and the position of the focal point with respect to the workpiece is shifted. To obtain a reference for the position of the focal point, an image of a luminating modulation object is projected through the objective onto the workpiece into the focal plane or so as to intersect it. Reflections of the image occurring at the boundary surface are imaged into an autofocus image plane, and are detected by a camera. The camera image plane either intersects the autofocus image plane when the image of the illuminating modulation object lies in the focal plane, or lies in the autofocus image plane when the image of the modulation object intersects the focal plane. | 11-25-2010 |
| 20100214414 | HMD APPARATUS FOR USER WITH RESTRICTED FIELD OF VISION - An HMD apparatus including a head mount to be mounted on the head of a user, a camera having a predetermined field of view, and a display module, both mounted to the head mount. When the head mount is mounted on the head, the predetermined field of view is greater than a visual field of a first eye of the user, and the camera records an image of the surroundings located in the field of view in the viewing direction of the first eye. The camera transmits the image to the display module which presents the image to the first eye of the user such that the image is located completely within the user's visual field. | 08-26-2010 |
| 20100157246 | OPHTHALMIC SURGICAL SYSTEM - A system includes an optical system having two beam splitters (a dichroic beam splitter and a polarizing beam splitter), which are designed to provide three separate beam paths for observing an object. The dichroic beam splitter is designed to separate two beam paths depending on the wavelength of the light of the respective beam path. The polarizing beam splitter is designed such that two beam paths are separated depending on a direction of polarization of the light of the respective beam path. The measuring light is linearly polarized after having passed the polarizing beam splitter and may be influenced with respect to the state of polarization by a retarding plate. The returning measuring light incident on the polarizing beam splitter is linearly polarized and also polarized in such a direction that the returning measuring light is transported through the polarizing beam splitter towards the analyzing detector with a high efficiency. | 06-24-2010 |
| 20100134534 | DISPLAY UNIT, AND DISPLAYING METHOD FOR THE BINOCULAR REPRESENTATION OF A MULTICOLOR IMAGE - A display unit for binocular representation of a multicolor image including a control unit triggering an imaging element such that the imaging element generates in a temporal successive manner the image to be displayed for a first beam path and a second beam path as a first image and second image, respectively. The images are generated in a pre-distorted manner, opposite of the chromatic aberration of the respective beam path, such that the chromatic aberration generated in the respective beam path is compensated when the first and second image is displayed. The display unit includes a switching module which operates in temporal synchrony with the first and second image being generated, such that a user can see the first image only via the first beam path and the second image only via the second beam path. | 06-03-2010 |
| 20100128346 | OPTICAL OCULAR SYSTEM - The present invention relates to an optical ocular system having imaging optics that map an image generated in an object plane such that a user can perceive the same in an image plane, wherein the imaging optics comprise a first lens having negative refractive power, and a deflection element having positive refractive power, which is connected downstream of the first lens, effecting a folding of the optical path by means of a single reflection, wherein the first lens and the object plane form a first optical group, and a displacement unit is provided, which can change the distance between the first optical group and the displacement element for the correction of spherical ametropia of the user. | 05-27-2010 |
| 20100103524 | METHOD FOR PRODUCING AN ANTI-REFLECTION SURFACE ON AN OPTICAL ELEMENT, AND OPTICAL ELEMENTS COMPRISING AN ANTI-REFLECTION SURFACE - The invention relates to a method for producing an anti-reflection surface on an optical element, said method comprising the following steps: a) the optical element is prepared; b) uncharged, spherical, micellar polymer units comprising an inner core region and an outer shell region are prepared; and c) at least one region of the surface of the optical element is coated with polymer units in such a way that the polymer units are essentially regularly dispersed in a film-type layer over the surface of the optical element. The invention also relates to an optical element having an anti-reflection surface ( | 04-29-2010 |
| 20090268305 | ANAMORPHOTIC IMAGING OBJECTIVE - An anamorphic imaging objective having multiple effective optical surfaces. One of the effective surfaces is implemented as anamorphic and one of the effective surfaces is implemented as a free-form surface, which has an aspheric contour in at least one of the two main sections and which has precisely two planes of mirror symmetry, the main sections lying in the planes of mirror symmetry. | 10-29-2009 |
| 20090245730 | Optical Display Device - An optical display device, in particular for use in a head-up display or a head-mounted display, comprises an essentially planar light guide, an image-generating system, a first diffraction grating by which light that comes from the image-generating system can be coupled into the light guide, and a second diffraction grating, by which the light can be coupled out again from the light guide. At least one of the two diffraction gratings is a binary-blazed grating having a multiplicity of diffraction structures, which are composed of a multiplicity of individual substructures that ensure a blaze effect and in plan view have the shape of a closed geometrical surface. | 10-01-2009 |
| 20090243964 | DISPLAY APPARATUS - A display apparatus which comprises an image module for generating an image, a spectacle-like frame which carries the image module, and wherein the spectacle-like frame comprises a front portion with a nose support, as well as two side arms mounted to the front portion. At least one earphone is mounted to the frame via a positioning mechanism. The earphone can be positioned in front of an ear of a user by means of the positioning mechanism, when the display apparatus is mounted on the user's head. The positioning mechanism comprises a linear guide which is mounted to the frame via a hinge joint and the earphone is positioned at the end of the linear guide, turned away from the hinge joint. | 10-01-2009 |
| 20090121971 | DISPLAY APPARATUS - A display apparatus which comprises an image module for generating an image, a spectacle-like frame which carries the image module, and wherein the spectacle-like frame comprises a front portion with a nose support, as well as two lateral temples mounted to the front portion. At least one of the temples has shiftably mounted to it a holding element. The holding element comprises a first portion extending downwards from the temple, and a second portion connected with the lower end of the first portion, the second portion extending from the lower end of the first portion in a direction pointing away from the front portion. | 05-14-2009 |
| 20090067715 | ELECTRONIC VISION AID AND ELECTRONIC VISION AID METHOD - An electronic visual aid is provided that includes an evaluating unit, which is supplied with a recording of an information carrier on which information standing out visibly from the background is displayed. The evaluating unit determines a brightness distribution of the recording and derives from the brightness distribution a brightness threshold value lying in the transition zone between a zone of the brightness distribution associated with the background and a zone of the brightness distribution associated with the information. The visual aid also includes an image processing unit which generates from the recording a binary image having only two different, predetermined brightness values, by respectively assigning to the pixels of the binary image the first of the two brightness values when the brightness of the corresponding pixel of the recording is below the brightness threshold value, and otherwise assigning the second brightness value. Also included is a display unit which displays the binary image and is provided as an HMD device. | 03-12-2009 |
| 20080274437 | METHOD AND APPARATUS FOR IDENTIFYING TOOTH-COLOURED TOOTH FILLING RESIDUES - A tooth is irradiated with light ( | 11-06-2008 |
