Abstract: A computer-implemented method of determining a base curve value representing a base curve for a front surface of a spectacle lens is disclosed. The method includes receiving individual prescription data and determining the base curve value for the front surface of the spectacle lens based on the prescription data. In particular, the base curve value is calculated from the received prescription data based on a functional relationship between one or more values included in the prescription data and the base curve value.

Abstract: In a method for characterizing the surface shape, the following steps are carried out iteratively: (A) calculating a first figure based on first measurements; (B) subtracting the first figure from first measured values, to determine a first test set-up error; (C) using the first test set-up error for calculating a corrected first figure,; (D) subtracting the corrected first figure from second measured values, to determine a second test set-up error; (E) using the second test set-up error for calculating a corrected second figure; (F) using the corrected second figure for correcting the first test set-up error by subtracting the corrected second figure from the first measured values, to determine a corrected first test set-up error; (G) using the corrected first test set-up error for calculating a first figure corrected once again; and (H) comparing the result with a convergence criterion and optionally repeating steps (A) to (H).

Abstract: The present invention relates to a charged particle beam system comprising a deflection subsystem configured to deflect a charged particle beam in a deflection direction based on a sum of analog signals generated by separate digital to analog conversion of a first digital signal and a second digital signal. The present invention further relates to a method of configuring the charged particle beam system so that each of a plurality of regions of interest can be scanned by varying only the first digital signal while the second digital signal is held constant at a value associated with the respective region of interest. The present invention further relates to a method of recording a plurality of images of the regions of interest at the premise of reduced interference due to charge accumulation.

Abstract: A particle beam system includes: a multi-beam particle source configured to generate a multiplicity of particle beams; an imaging optical unit configured to image an object plane in particle-optical fashion into an image plane and direct the multiplicity of particle beams on the image plane; and a field generating arrangement configured to generate electric and/or magnetic deflection fields of adjustable strength in regions close to the object plane. The particle beams are deflected in operation by the deflection fields through deflection angles that depend on the strength of the deflection fields.

Abstract: An insert for a source chamber of an EUV radiation source has a pressure stage and, spaced apart from it, a stop.

Abstract: The present application relates to a method for disposing of excess material of a photolithographic mask, wherein the method comprises the following steps: (a) enlarging a surface of the excess material; (b) displacing the enlarged excess material on the photolithographic mask using at least one first probe of a scanning probe microscope; and (c) removing the displaced enlarged excess material from the photolithographic mask.

Abstract: A contactless visualization system for a microscope for eye surgery includes an ophthalmic loupe positionable in front of a patient's eye and supplies a real and vertically and laterally inverted image of the fundus in an intermediate image plane observable with the microscope. The loupe includes first and second lens elements. When positioned in front of the eye, the first lens element is closer to the eye than the second. A wall extending from the first to the second lens element has a free end in a form of a mount which holds the second lens element. The wall has a passage opening formed therein for removing liquid possibly present in an intermediate space between the first lens element and the second lens element. The first lens element has a boundary surface facing the second lens element. The passage opening includes a lower edge bordering on the boundary surface of the first lens element.

Abstract: The invention relates to techniques for producing an HOE by replication of a master HOE. In particular, techniques that allow variable surface shape during replication are described. A curved trajectory is used for exposure.

Abstract: Provided are a method and a device for generating a set of virtual representation data of a spectacle lens. A set of scanning data of a profile of an edge surface of the spectacle lens is obtained by scanning the edge surface using an optical scanner. Further, a set of imaging data is obtained with a camera facing a front or a back surface of the spectacle lens. Additionally, generating a set of virtual representation data of the spectacle lens is based on the set of scanning data and the set of imaging data. Further, a set of virtual representation data is provided, its use for characterizing an accuracy of fit of the spectacle lens, and/or for monitoring a manufacturing process, as well as a method for manufacturing a spectacle lens. The optical scanner is a laser scanner for scanning a height profile of the edge surface.

Abstract: A progressive spectacle lens, a method for its production, and a related computer program are disclosed. The progressive spectacle lens has a progressive surface including a central viewing zone, a lower viewing zone, two peripheral vision zones extending bilaterally from a vertical meridian of the progressive surface, and an upper viewing zone. The central viewing zone has a surface power providing a first refracting power for distance vision and the lower viewing zone has a greater surface power than the central viewing zone providing a second refracting power corresponding to near vision and being connected to the central viewing zone by a first progressing power region. The progressive spectacle lens generates a retarding or arresting effect on myopia progression, especially in myopic juveniles.

Abstract: A 3D tomographic inspection method for the inspection of semiconductor features in an inspection volume of a semiconductor wafer includes obtaining a 3D tomographic image, and selecting a plurality of 2D cross section images. The method also includes identifying contours of HAR structures, and extracting deviation parameters. The deviation parameters describe fabrication errors such as displacement, deviation in radius or diameter, area or shape.

Abstract: The invention relates to a computer-assisted method for position determination for an intraocular lens supported by machine learning. The method comprises providing a scan result for an eye. The scan result here represents an image of an anatomical structure of the eye. The method further comprises use of a trained machine learning system for the direct determination of a final location of an intraocular lens to be fitted, wherein digital data of the scan of the eye is used as the input data for the machine learning system.

Abstract: The disclosure relates to a damping arrangement for vibration damping of an element in an optical system, for example in a microlithographic projection exposure apparatus. A damping arrangement according to the disclosure has an element, a fluid located in a cavity, and at least one channel connected to the cavity. A vibration of the element causes vibration energy of the element to be dissipated by partial displacement of the fluid from the cavity into the at least one channel.

Abstract: In order to determine a production aerial image of an object to be measured as a result of an illumination and imaging with illumination and imaging conditions of an optical production system, firstly a measurement aerial image of the object to be measured is captured. This is carried out with illumination and imaging conditions of an optical measurement system, which conditions include a predefined measurement illumination setting. Data of the measurement aerial image are generated during the capturing. An object structure of the object to be measured is reconstructed from the data of the captured measurement aerial image by use of a reconstruction algorithm. Data of the reconstructed object structure are generated during the reconstructing. A production aerial image is simulated from the data of the reconstructed object structure with the illumination and imaging conditions of the optical production system.

Abstract: An eye surgery surgical system includes a visualization device for visualizing the position of at least one trocar point for a trocar on the sclera of a patient's eye. The trocar serves to introduce a surgical instrument configured for surgical interventions on the fundus of the patient's eye into the patient's eye. The eye surgery surgical system also includes a computer unit which is configured to provide the position of the at least one trocar point to the visualization device. Here, the computer unit contains a trocar point computation routine configured to calculate the position of the at least one trocar point from the location of at least one surgical site in a model of the patient's eye and from geometric data relating to at least one surgical instrument introducible into the patient's eye through the trocar.

Abstract: A device for extracting lens material from an eye including a distal, disposable portion releaseably coupleable to a proximal, reusable portion. The disposable portion includes a cutting tube having a distal cutting tip and an inner lumen having a distal end. The disposable portion includes an aspiration pump fluidly coupled to the inner lumen of the cutting tube and a cutting tube drive mechanism configured to oscillate the cutting tube. The reusable portion includes an aspiration pump motor configured to drive the aspiration pump and a coupler for releaseably operatively coupling the pump motor to the aspiration pump. Related devices, systems, and methods are disclosed.

Abstract: Semiconductor structures can be investigated, e.g., in an in-line quality check. An x-ray scattering measurement, e.g., CD-SAXS, can be used for wafer metrology. The x-ray scattering measurement can be configured based on a slice-and-imaging tomographic measurement using a dual-beam device, e.g., including a focused ion beam device and a scanning electron microscope.

Abstract: The invention relates to a particle beam device (100) for imaging, analyzing and/or processing an object (114).

Abstract: A method for operating an EUV lithography apparatus (1) with at least one vacuum housing (27) for at least one reflective optical element (12) includes operating the EUV lithography apparatus in an exposure operating mode (B), in which EUV radiation (5) is radiated into the vacuum housing, wherein a reducing plasma is generated at a surface (12a) of the reflective optical element in response to an interaction of the EUV radiation with a residual gas present in the vacuum housing. After an exposure pause, in which no EUV radiation is radiated into the vacuum housing, and before renewed operation of the EUV lithography apparatus in the exposure operating mode (B), the EUV lithography apparatus is operated in a recovery operating mode, in which oxidized contaminants at the surface of the reflective optical element are reduced in order to recover a transmission of the EUV lithography apparatus before the exposure pause.

Abstract: A component arrangement includes an x-ray therapy component having a first RFID transponder, a primary packaging, in which the component is sterilely packed, and secondary packaging with a second RFID transponder in which the component packed in the primary packaging is arranged. An x-ray therapy system and a method for operating an x-ray therapy system are provided, in which data of a second RFID transponder arranged in and/or on secondary packaging of the component are read with a second RFID reader of a control device of the x-ray therapy system, and/or data are written to the second RFID transponder, the component sterilely packed in primary packaging is removed from the primary packaging, and data of a first RFID transponder of the component are read with a first RFID reader of an x-ray therapy device of the x-ray therapy system, and/or data are written to the first RFID transponder.