Abstract: A field facet system for a lithography apparatus includes an optical element. The optical element includes a base section having an optically effective surface. The optical element also includes a plurality of lever sections provided at a rear side of the base section facing away from the optically effective surface. In addition, the field facet system includes two or more actuating elements configured, with the aid of the lever sections acting as levers, to apply in each case a bending moment to the base section to elastically deform the base section and thus to alter a radius of curvature of the optically effective surface. The actuating elements are arranged in series as viewed along a length direction of the optical element.

Abstract: 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.

Abstract: A method for producing a freeform Fresnel surface having a number of Fresnel facets with a respective Fresnel segment surface and a trailing edge includes the production of the freeform Fresnel surface via machining processing of a starting body based on the construction data for the freeform Fresnel surface. With the aid of the circular cylinder casing surfaces and/or cone casing surfaces, the projection of the edges of the Fresnel facets on the x-y-plane represent circular paths for the creation of the construction data.

Abstract: An imaging apparatus for smartglasses includes an image generator element arrangement having a number of image generator elements, on which a corresponding number of original partial images is represented, a number of imaging channels comprising in each case at least one image-forming reflection surface and/or at least one image-forming refraction surface, said number corresponding to the number of image generator elements, wherein each of the imaging channels is associated with one of the image generator elements and transmits one of the original partial images, and a spectacle lens, which is common to all imaging channels and via which the imaging channels are directed in the direction of an observer's eye. The image-forming reflection surfaces and/or refraction surfaces of the imaging channels are surfaces of a prism that is arranged on the spectacle lens.

Abstract: Methods of manufacturing eyeglasses are provided. The method may include providing a blank (63) with an outcoupling element (25) and machining the blank to provide a light receiving surface based on the at least one physiological parameter. Corresponding blanks and sets of eyeglasses are also provided.

Abstract: A field facet system for a lithography apparatus includes an optical element. The optical element includes a base section having an optically effective surface. The optical element also includes a plurality of lever sections provided at a rear side of the base section facing away from the optically effective surface. In addition, the field facet system includes two or more actuating elements configured, with the aid of the lever sections acting as levers, to apply in each case a bending moment to the base section to elastically deform the base section and thus to alter a radius of curvature of the optically effective surface. The actuating elements are arranged in series as viewed along a length direction of the optical element.

Abstract: An illumination system for producing an illumination pattern for measuring the cornea of an eye and, in particular, for determining the topography thereof and in so doing facilitating distance-independent measurements. The illumination system according to the invention for determining the topography of the cornea of an eye includes an illumination unit and a unit for producing an illumination pattern, wherein the illumination unit includes a plurality of illumination modules. A lens array which produces a spatially distributed, collimated illumination pattern is used as a unit for producing an illumination pattern. The illumination system produces an illumination pattern, by which the topography of the cornea of an eye can be determined. Here, the illumination system is designed as a compact module, and so it can be easily combined with other measurement systems, without colliding with the beam paths thereof.

Abstract: A spectacle lens for an imaging optical unit for producing a virtual image of an output image presented on an image generator includes an inner surface facing the eye and an outer surface facing away from the eye, an input coupling section, and an output coupling structure. The imaging beam path is guided to the output coupling structure by way of reflections between the inner surface and the outer surface. A reflection surface having a concave curvature when seen from the interior of the spectacle lens is present between the input coupling section and the output coupling structure in the region of the inner surface and/or in the region of the outer surface. The curvature of said reflection surface differs from a basic curvature of the inner surface or of the outer surface of the spectacle lens.

Abstract: The disclosure relates to a lithography apparatus for writing to substrate wafers. The apparatus includes: a light generating device including one or a plurality of light sources for generating light; a writing device; a light transferring device including a number of optical waveguides for transferring the light from the light generating device to a writing device, the writing device including a plurality of individually controllable write heads for projecting the light from the one or the plurality of light sources in different regions of a substrate wafer; a transport device for moving the substrate wafer relative to the writing device in a predefined transport direction; and a control device for controlling the writing process on the substrate wafer.

Abstract: A spectacle lens for a display device that can be fitted on the head of a user and generates an image, wherein the spectacle lens comprises a front side and a rear side, a coupling-in section and a coupling-out section spaced apart from the coupling-in section, which comprises several reflective deflecting surfaces arranged next to each other, which together form a reflective Fresnel surface, as well as a light-guiding channel which is suitable for guiding light bundles of pixels of the generated image, which are coupled into the spectacle lens via the coupling-in section of the spectacle lens, in the spectacle lens to the coupling-out section, by which they are coupled out of the spectacle lens, and wherein the distance of the reflective deflecting surfaces from the front side increases and/or decreases as the distance from the coupling-in section increases.

Abstract: A spectacle lens for an imaging optical unit for producing a virtual image of an output image presented on an image generator includes an inner surface facing the eye and an outer surface facing away from the eye, an input coupling section, and an output coupling structure. The imaging beam path is guided to the output coupling structure by way of reflections between the inner surface and the outer surface. A reflection surface having a concave curvature when seen from the interior of the spectacle lens is present between the input coupling section and the output coupling structure in the region of the inner surface and/or in the region of the outer surface. The curvature of said reflection surface differs from a basic curvature of the inner surface or of the outer surface of the spectacle lens.

Abstract: The disclosure relates to a lithography apparatus for writing to substrate wafers. The apparatus includes: a light generating device including one or a plurality of light sources for generating light; a writing device; a light transferring device including a number of optical waveguides for transferring the light from the light generating device to a writing device, the writing device including a plurality of individually controllable write heads for projecting the light from the one or the plurality of light sources in different regions of a substrate wafer; a transport device for moving the substrate wafer relative to the writing device in a predefined transport direction; and a control device for controlling the writing process on the substrate wafer.

Abstract: An imaging apparatus for smartglasses includes an image generator element arrangement having a number of image generator elements, on which a corresponding number of original partial images is represented, a number of imaging channels comprising in each case at least one image-forming reflection surface and/or at least one image-forming refraction surface, said number corresponding to the number of image generator elements, wherein each of the imaging channels is associated with one of the image generator elements and transmits one of the original partial images, and a spectacle lens, which is common to all imaging channels and via which the imaging channels are directed in the direction of an observer's eye. The image-forming reflection surfaces and/or refraction surfaces of the imaging channels are surfaces of a prism that is arranged on the spectacle lens.

Abstract: A method for producing a freeform Fresnel surface having a number of Fresnel facets with a respective Fresnel segment surface and a trailing edge includes the production of the freeform Fresnel surface via machining processing of a starting body based on the construction data for the freeform Fresnel surface. With the aid of the circular cylinder casing surfaces and/or cone casing surfaces, the projection of the edges of the Fresnel facets on the x-y-plane represent circular paths for the creation of the construction data.

Abstract: An illumination system for producing an illumination pattern for measuring the cornea of an eye and, in particular, for determining the topography thereof and in so doing facilitating distance-independent measurements. The illumination system according to the invention for determining the topography of the cornea of an eye includes an illumination unit and a unit for producing an illumination pattern, wherein the illumination unit includes a plurality of illumination modules. A lens array which produces a spatially distributed, collimated illumination pattern is used as a unit for producing an illumination pattern. The illumination system produces an illumination pattern, by which the topography of the cornea of an eye can be determined. Here, the illumination system is designed as a compact module, and so it can be easily combined with other measurement systems, without colliding with the beam paths thereof.

Abstract: 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.

Abstract: The invention relates to a device for optical examination of a specimen with a cryo-immersion objective, having a stative, to which the cryo-immersion objective is fixed, wherein the cryo-immersion objective has a plurality of optical components, in particular lenses, and wherein the cryo-immersion objective has an optical front component which is in contact during operation with a coolable immersion liquid, having a specimen carrier for a specimen to be examined, having means for providing a cooled immersion liquid between the optical front component and the specimen to be examined on or against the specimen carrier. The device is characterized in that insulating means are present for interrupting a heat transition between the stative and the optical front component.

Abstract: A spectacle lens for a display device that can be fitted on the head of a user and generates an image, wherein the spectacle lens comprises a front side and a rear side, a coupling-in section and a coupling-out section spaced apart from the coupling-in section, which comprises several reflective deflecting surfaces arranged next to each other, which together form a reflective Fresnel surface, as well as a light-guiding channel which is suitable for guiding light bundles of pixels of the generated image, which are coupled into the spectacle lens via the coupling-in section of the spectacle lens, in the spectacle lens to the coupling-out section, by which they are coupled out of the spectacle lens, and wherein the distance of the reflective deflecting surfaces from the front side increases and/or decreases as the distance from the coupling-in section increases.

Abstract: An imaging optical system for a display device that can be fitted on the head of a user and generate an image, with an optical element, which includes an entry surface, and a spectacle lens, which includes a coupling-out section. The imaging optical system is configured to guide the generated image fed to the optical element via the entry surface in the optical element, and to couple it from the latter into the spectacle lens, in which it is guided to the coupling-out section and coupled out via the coupling-out section to generate a virtual image. The optical element includes, in addition to the entry surface, at least one reflecting surface, on which the generated image is reflected for guiding in the optical element, and in that the optical element and the spectacle lens are formed together as a one-piece optical part.

Abstract: An imaging optical system for a display device that can be fitted on the head of a user and generate an image, with an optical element including an entry surface, and a spectacle lens, which includes a coupling-in section and a coupling-out section spaced apart therefrom. The imaging optical system can guide the generated image fed to the optical element via the entry surface in the optical element, for coupling it from the latter into the spectacle lens, in which it is guided to the coupling-out section and coupled out via the coupling-out section to generate a virtual image. The optical element includes an entry surface, at least one reflecting surface, on which the generated image is reflected, and an exit surface. The entry surface, the at least one reflecting surface and/or the exit surface are formed curved, with the result that the optical element has an imaging property.