Abstract: A coating of spectacle lenses is applied by physical vapor deposition (PVD). A method for physical vapor deposition includes: providing a crucible containing a first evaporation material and a second evaporation material, wherein the first evaporation material has a first vapor pressure and the second evaporation material has a second vapor pressure different from the first vapor pressure. A ratio of an exposed surface of the first evaporation material and an exposed surface of the second evaporation material in the crucible is adapted to counterbalance the difference in vapor pressure between the first and the second evaporation material. Concurrent evaporation of the first evaporation material and the second evaporation material from the same crucible take place. The disclosure further relates to a crucible for physical vapor deposition and a physical vapor deposition system in particular for coating an optical surface such as a spectacle lens.

Abstract: An optical system for a laser therapy instrument for the application of laser radiation on and in the eye, includes a femtosecond laser, an objective. The objective or at least one lens or lens group of the objective is shiftable in the direction of the optical axis being intended for shifting of the focus position from the region of the cornea to the region of the crystalline lens and vice versa. The optical system may include at least two optical assemblies designed for the axial variation of the focus of the therapeutic laser radiation, with the focus variation range ?z differing between the individual assemblies and a changing device, designed for the insertion of any one of these assemblies into the therapeutic laser beam path at a time.

Abstract: A method for determining a near point and a near point distance of a person is disclosed, as well as methods for determining a spherical refractive power. In one implementation, optotypes are displayed on a mobile terminal and the person is asked to move the mobile terminal to the near point of the person. The position of the mobile terminal is determined on the basis of images of the surroundings and measurements of an acceleration of the mobile terminal. The near point distance can then be determined from the position of the mobile terminal at the near point and a position of the eyes of the person. Corresponding computer programs and corresponding mobile terminals are also disclosed.

Abstract: The electron beam is typically dynamically steered after its generation on the path to the target. The steering is performed by one or more source coils. These coils produce the magnetic field outside the vacuum vessel allowing air/water/oil cooling to remove undesired heat. The magnetic field is then picked up inside the vacuum vessel with pole pieces and guided towards the region where the magnetic field is needed to steer the electron beam.

Abstract: Processing an object using a material processing device with a particle beam apparatus includes determining a region of interest of the object on or in a first material region of the object, ablating material from a second material region adjoining the first material region using an ablation device, and recognizing a geometric shape of the first material region. The geometric shape has a center. Processing the object also includes ablating material from a second portion of the first material region adjoining a first portion using a particle beam, the first portion having a first subregion and a second subregion, the region of interest being arranged in the first subregion, recognizing a further geometric shape of the first material region, positioning the object such that the first position corresponds to a center of the further geometric shape, and ablating material from the second subregion using the particle beam.

Abstract: Disclosed is a changing device for optical components in a microscope. The changing device includes an optical component having a flat surface. The changing device further includes a carrier for inserting and/or holding the optical component. The changing device further includes a receptacle for holding the carrier in an optical path of the microscope. The carrier has bearing surfaces for the flat surface of the optical component and positioning surfaces located in the same plane, which are not covered by the optical component, when inserting the latter. The receptacle has bearing surfaces for contact with the positioning surfaces and first attachment means for attaching the carrier positioned on the receptacle in order for the positioning surfaces to act upon the bearing surfaces.

Abstract: An apparatus for measuring, inspecting and/or processing objects is provided. The apparatus has a mobile platform for moving the apparatus through a region in space and a kinematic system attached to the mobile platform. An instrument head is fitted to the kinematic system. The apparatus furthermore comprises a controller configured to determine a first estimate of a pose of a target object on the basis of an image from a camera of the apparatus and a digital representation of the target object, to control the mobile platform on the basis of the first estimate, to move toward the target object, to determine a second estimate, in particular a more accurate estimate, of the pose of the target object on the basis of signals from at least one sensor of the apparatus and to control the kinematic system to position the instrument head on the target object on the basis of the second estimate.

Abstract: Operating a gas feed device for a particle beam apparatus includes predetermining a flow rate of a precursor through an outlet of a precursor reservoir containing the precursor to be fed onto an object, loading a temperature of the precursor reservoir, the temperature being associated with the predetermined flow rate, from a database into a control unit, setting a temperature of the precursor reservoir to the temperature loaded from the database using a temperature setting unit, and determining at least one functional parameter of the precursor reservoir depending on the flow rate and the temperature, loaded from the database, using the control unit and informing a user of the gas feed device about the determined functional parameter. Informing the user of the gas feed device about the functional parameter may include displaying the functional parameter on a display unit, outputting an optical signal, or outputting an acoustic signal.

Abstract: System for state monitoring of a microscope the system having at least one measuring sensor in each case for capturing at least one time-variable chemical and/or physical quantity, a camera for recording an image in a field of view and a processing unit. The at least one measuring sensor has a display area and displays thereon a measured value for the captured time-variable chemical and/or physical quantity. The camera is arranged so that the display areas of at least one measuring sensor are located in the field of view and the processing unit is configured to evaluate the image and to extract the display areas contained in the image therefrom. Also, a method for state monitoring of a microscope is disclosed, wherein at least one measuring sensor with a display area is provided in order to capture in each case at least one time-variable chemical and/or physical quantity, and an image is recorded. The image is recorded so that it contains the display areas of at least one measuring sensor.

Abstract: Computer implemented methods for mobile device, mobile devices and computer programs are utilized for determining the center of rotation of the eye. An image of an eye of a person is captured in at least two positions of the mobile device, and the position of the center of rotation is determined based on the images and the position. In a similar manner, optionally a pupil position may be determined.

Abstract: Apparatuses or methods for determining a refractive error of an eye are disclosed. An intensity of light coming from an eye is measured, using a detector device, through at least two or at least three different apertures of the aperture device. The refractive error is then calculated based on the measured intensities.

Abstract: An ophthalmic imaging system has a specialized graphical user interface GUI to convey information for manually adjusting control inputs to bring an eye into alignment with the system. The GUI uses color and size changes to indicate axial positioning information of the system relative to a patient's eye. Furthermore, no live feed of the patient's eye is needed. Rather, a graphic indicating the patient's eye is provided and its size is controlled to indicate axial information and to filter out momentary movements of the pupil.

Abstract: A system, method, and/or device for determinizing a quality measure of OCT structural data and/or OCTA functional data uses a machine learning model trained to provide a single overall quality measure, or a quality map distribution for the OCT/OCTA data based on the generation of multiple features maps extracted from one or more slab views of the OCT/OCTA data. The extracted feature maps may be different texture-type maps, and the machine model is trained to determine the quality measure based on the texture maps.

Abstract: The present invention relates to a method for measuring a sample with a microscope, the method comprising scanning the sample using a focusing plane having a first angle with respect to a top surface of the sample and computing a confidence distance based on the first angle. The method further comprises selecting at least one among a plurality of alignment markers on the sample for performing a lateral alignment of the scanning step and/or for performing a lateral alignment of an output of the scanning step. In particular, the at least one alignment marker selected at the selecting step is chosen among the alignment markers placed within the confidence distance from an intersection of the focusing plane with the top surface.

Abstract: A method of assembling a facet mirror of an optical system, in which facets of the facet mirror are imaged onto a field plane of the optical system, includes: a) determining positions of the facets of the facet mirror relative to interfaces of the facet mirror, with the aid of which the facet mirror is able to be connected to a support structure; b) calculating an actual position of an object field of the optical system arising for the facet mirror in the field plane; and c) arranging spacers between the interfaces and the support structure so that the object field in the field plane is brought from the calculated actual position to a target position.

Abstract: An arrangement for light sheet microscopy contains an illumination objective for illuminating a sample located on a slide in a medium with a light sheet, a detection objective, a separation layer system, a first adaptive optical detection correction element, and a further adaptive optical detection correction element and/or a first adaptive optical illumination correction element, and optionally, a further adaptive optical illumination correction element. The arrangement contains an adjustment device for the controlled movement of the first detection correction element and of the further detection correction element and/or of the first illumination correction element and of the further illumination correction element; and a control unit, to generate control commands and to actuate the adjustment devices by means of the control commands such that aberrations are reduced. Corresponding objectives and a corresponding method for reducing aberrations can be used.

Abstract: A hologram for an illumination device for vehicles and a corresponding illumination device are provided. The hologram has a plurality of holographic structures designed for a respectively associated wavelength, wherein the holographic structures have diffraction properties that are identical among one another.

Abstract: An apparatus for determining a spatial position and orientation of a tracked measuring device includes a light detection and ranging (LIDAR) unit having at least one measurement channel configured to generate at least one measurement signal, and a control and evaluation unit including a reception unit configured to receive data from the tracked measuring device in wireless fashion, the LIDAR unit being configured to generate a LIDAR signal for the at least one measurement signal and to transfer said LIDAR signal to the control and evaluation unit, the apparatus having a synchronization channel integrated at least in part into the measurement channel of the LIDAR unit and configured to determine a synchronization information item, and the control and evaluation unit being configured to temporally synchronize the data of the tracked measuring device and the LIDAR signal by taking into account the at least one synchronization information item.

Abstract: A method for setting position of a component of a particle beam apparatus may be performed, for example, by the particle beam apparatus. The component may be embodied as a gas feed device, as a particle detector and/or as a beam detector. The method may include: aligning the component with a coincidence point of a particle beam of the particle beam apparatus, determining a rotation angle of a rotation of an object carrier about a rotation axis, loading a position of the component associated with the rotation angle from a database into a control unit, transmitting a control signal from the control unit to a drive unit for moving the component, and moving the component into the position loaded from the database by means of the drive unit, wherein the component arranged in the loaded position is at a pre-definable distance from the object.