Abstract: Various examples of the disclosure relate to coherent imaging techniques such as digital holography or Fourier ptychography. Aberrations are corrected. The aberrations are corrected according to the field location.

Abstract: An optical system with an optical axis includes a display for displaying an image, an eyepiece for viewing the image, the eyepiece including a lens. The display is configured such that a marginal ray light beam emanates from an edge of the display and propagates to the lens in a light incidence direction. The display is arranged first along the optical axis in the light incidence direction, followed by the lens arranged on the optical axis. No further optical unit of the optical system is arranged between the lens and a pupil of the eye. The marginal ray light beam has a chief ray. The chief ray propagates at a first chief ray height at the lens and at a second chief ray height at the display. The first chief ray height is at least level with the second chief ray height.

Abstract: A method for setting a sighting device with a telescopic sight and an attachment device is provided. The attachment device includes a display, a control element, and a non-transitory computer-readable storage medium, and is connected to the telescopic sight such that the display can be observed through the telescopic sight. The method includes displaying a center marking at a center position on the display and activating a first interaction mode, in which the center position of the center marking can be shifted into a new center position by operating at least one control element, displaying a circular marking and activating the second interaction mode, in which the size of the circular marking is changeable by operating at least one control element, and storing display information regarding the new center position and the size of the circular marking in the non-transitory computer-readable storage device.

Abstract: A method of setting up non-randomly positioned markers in a field of view of a camera bar, and tracking a pose of the camera bar, including: (i) a camera bar of a video camera viewing a field of view; (ii) displaying the camera bar's view on a display; (iii) the computer system: generating a pattern of non-random marker positions, and displaying them with the camera bar's view; (iv) detecting that a marker has been placed in a position of a non-random marker position; (v) recording a marker and a respective position of the marker; (vi) repeating steps (iv) and (v) until a predetermined number of different markers and respective marker positions have been recorded; (vii) matching markers detected with the recorded markers and their respective marker positions, to obtain a pose of the camera bar; (viii) repeating step (vii), to track the pose of the camera bar.

Abstract: An optical system includes a display configured to display an image and including an eyepiece for observing the image. The eyepiece includes a first lens group and a second lens group. An intermediate pupil is arranged between the first lens group and the second lens group. The second lens group is configured to image the image displayed by the display into the intermediate pupil. The first lens group is configured to image the image arranged in the intermediate pupil into a spatial region. The intermediate pupil and the spatial region are conjugate to one another. A filter unit and/or a wavefront manipulator is/are arranged at the intermediate pupil.

Abstract: A method is provided for operating an electro-optic observation device, in particular a thermal imaging device, which includes an electronic viewfinder, a proximity sensor and a position sensor. According to the method, a predefined distance range in front of the viewfinder is monitored for a presence of a user with the proximity sensor, a position variable which is characteristic of the orientation of the observation device is captured with the position sensor, information concerning a current use situation of the observation device is derived from the presence of the user within the distance range and/or the position variable, and at least one specific function of the observation device that influences an image display is activated or at least enabled depending on the information concerning the current use situation.

Abstract: A computer-implemented method configured to check a correctness of an assembly is provided, wherein the method comprises determining an actual 3D model of the assembly based on image data relating to the assembly, and comparing the determined actual 3D model with a target 3D model of the assembly to check the correctness of the assembly.

Abstract: A guide component for joint guidance of at least two optical elements that are movable in relation to one another is described. The guide component comprises at least two separate planar sliding guide surfaces arranged with a fixed spatial alignment relative to one another, a first sliding guide surface comprising a first surface normal and being configured to rest against and slidingly guide a first optical element in relation to a second optical element, and a second sliding guide surface comprising a second surface normal and being configured to rest against and slidingly guide the second optical element in relation to the first optical element, the first surface normal and the second surface normal running parallel to one another in opposite directions.

Abstract: A method and a device for measuring the topography and/or the gradients and/or the curvature of an optically active surface of an object are disclosed. The device allows the object to be arranged in a receiving region with a contact surface for contact with the object. Inside the device, there is a plurality of point light sources that provide light that is reflected at the surface to be measured of an object arranged in the receiving region. The device includes at least one camera with an objective assembly and an image sensor for detecting a brightness distribution which is produced on a light sensor by the light of the point light sources reflected at the surface to be measured.

Abstract: An apparatus and method for scanning ascertainment of a distance to an object are disclosed. Lasers of a light source emit a plurality of optical signals each having a time-varying frequency. At a given time, the frequencies of the optical signals are different. An evaluation device ascertains the distance to the object on the basis of measurement optical signals that were emitted by the light source and reflected or scattered at the object, and of reference optical signals that were emitted by the light source and were not reflected or scattered at the object. A dispersive scanning device simultaneously deflects the optical signals in different frequency-dependent directions.

Abstract: A method of virtual staining of a tissue sample includes obtaining multiple sets of imaging data. The imaging data depicts a tissue sample and has been acquired using multiple imaging modalities. Further, the method includes fusing and processing the multiple sets of imaging data in a machine-learning logic. The machine-learning logic is configured to provide at least one output image. Each one of the at least one output image depicts the tissue sample comprising a respective virtual stain.

Abstract: A method for operating a LIDAR system with at least one spectrally tunable light source emitting a light beam having a temporally varying frequency and a transparent protective shield, arranged in a light path of the light beam, protecting the LIDAR system against environmental pollution includes determining distance values of an object based on beat frequencies of beat signals resulting from a superposition of partial signals obtained from partial reflection of the light beam at the object with reference signals not reflected at the object. Each distance value is determined from a peak in a signal spectrum obtained on the basis of a Fourier transformation of the beat signal. A degree of soiling of the protective shield is diagnosed by analyzing the signal spectrum in a predefined analysis frequency range. An upper limit frequency bounding said analysis frequency range is based on a distance of the protective shield.

Abstract: An optical arrangement having a center axis, an object side, an image side, and a catadioptric arrangement is provided. The catadioptric arrangement includes first and second partly reflective optical components, the first optical component including radially inner and radially outer regions, the inner region being configured to be transparent to light incident from the object side, and the outer region being configured to reflect light incident from the object side, the second optical component including a radially inner region and a radially outer region, the outer region being configured to be transparent to light incident from the object side, and the inner region being configured to be transparent to light incident from the object side and to reflect light incident from the image side. At least one further optical component with positive refractive power is arranged at the inner region of the second optical component on the object side.

Abstract: An optical system for imaging an object includes a first objective, a first image stabilizing unit, and a first image plane, wherein, as seen from the first objective in the direction of the first image plane, the first objective is arranged first along a first optical axis, followed by the first image stabilizing unit and then the first image plane, wherein the first image stabilizing unit comprises a first optical unit and a second optical unit, wherein the first optical unit is arranged between the first objective and the second optical unit, wherein the first optical unit is embodied so as to be rotatable about a first axis of rotation, and wherein the second optical unit is embodied so as to be rotatable about a second axis of rotation. The second optical unit is embodied as an optical roof edge unit.

Abstract: 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.

Abstract: A method for forming an image of an object, a computer program product, and an image forming system for carrying out the method are provided. In the method, data about the object are provided by a first data processing device, and a first data record with first data is provided. The first data record is loaded from the first data processing device into a second data processing device. A second data record is loaded from a data memory into the second data processing device in dependence on the first data record loaded into the second data processing device. A processing data record is generated or detected based on the second data record. A two-dimensional output image of the object is generated by processing the data about the object with the processing data record, the output image having a predeterminable number of output image pixels.

Abstract: The invention relates to a diffractive optical element with a spatial variation in the refractive index, wherein a sequence of adjacent sections, which form a diffractive structure, is formed by the spatial variation in the refractive index, within which sections the refractive index varies in each case. Over a spectral range extending over at least 300 nm, the diffractive structure has a diffraction efficiency of at least 0.95, averaged over the entire spectral range. The value of the diffraction efficiency of at least 0.95, averaged over the entire spectral range, is realized by a single single-layer diffractive structure with an optimized combination of at least two refractive indices and at least two Abbe numbers within each section of the sequence of adjacent sections. The refractive index variation can be achieved by means of doping, material mixing, or structuring into sub-wavelength ranges.