Abstract: A measurement device for spectroscopic constituent analysis includes a control unit, a light source, a sample holder arranged in the beam path of the light source, and a spectral measurement module. The measurement module comprises at least one photosensor with organic photodiodes arranged on a substrate and a temperature sensor arranged at the photosensor. During a sample measurement, a method using the measurement device comprises: detecting an actual temperature at the photosensor; pivoting-in a dark reference sample and measuring a dark reference value; pivoting-in a bright reference sample and measuring a bright reference value; measuring a spectral value of the sample and correcting the spectral value by means of a correction calculation by way of the control unit using the dark reference value, the bright reference value, the spectral value of the sample, the temperature and using values which were determined in a pre-calibration and stored in the control unit.

Abstract: A light guide for an imaging apparatus for generating a virtual image from an initial image with at least two different initial image field regions is provided. The light guide includes an input coupling structure for coupling beams coming from the initial image into the light guide, and an extensive output coupling structure for coupling the beams that were coupled into the light guide out of the light guide. The extensive output coupling structure includes at least two partial faces. Each partial face is assigned to a different one of the initial image field regions and couples out the beams coming from the corresponding initial image field region. The partial faces of the output coupling structure are tilted about two non-parallel axes. The light guide can be part of an imaging apparatus, which can be used in particular in a head-mounted display.

Abstract: A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described.

Abstract: A light guide for an imaging apparatus for generating a virtual image from an initial image with at least two different initial image field regions is provided. The light guide includes an input coupling structure for coupling beams coming from the initial image into the light guide, and an extensive output coupling structure for coupling the beams that were coupled into the light guide out of the light guide. The extensive output coupling structure includes at least two partial faces. Each partial face is assigned to a different one of the initial image field regions and couples out the beams coming from the corresponding initial image field region. The partial faces of the output coupling structure are tilted about two non-parallel axes. The light guide can be part of an imaging apparatus, which can be used in particular in a head-mounted display.

Abstract: An ophthalmological optical element, in particular a spectacle lens, includes a first refractive optical substrate, which has a positive or negative first optical power; a first diffractive optical element, which has a second optical power; and a second diffractive optical element, which has a third optical power. The first diffractive optical element and the second diffractive optical element have opposite optical powers. The first diffractive optical element and the second diffractive optical element interact in an at least partly achromatic manner.

Abstract: In an eyeglass lens, an edge adjustment between an incoupling segment and an outcoupling structure can be provided by shaping of the inner surface. In the region of the eyeglass lens through which the eye looks for straight-ahead viewing, the inner surface substantially has a curvature that approximates the curvature of a typical inner surface of an eyeglass lens to such an extent that no perceptible optical imaging errors are induced by the inner surface when straight-ahead viewing. In the region of the edge adjustment, the inner surface has a shape that deviates to a greater extent from the curvature of the typical inner surface, which shape enables an imaging beam path coupled into the eyeglass lens by the incoupling segment to be directed to the outcoupling structure by reflections between the inner surface and the outer surface of the eyeglass lens.

Abstract: Mobile computer devices and systems for refraction determination of an eye, for example for objective refraction determination and/or subjective refraction determination, are provided. Here, a display of the mobile computer device can be driven to display an image for refraction determination.

Abstract: A component for a mobile computer device, such as a smartphone, can be secured to the housing of the mobile computer device. The component can deflect the light of a built-in light source of the mobile computer device with an optical element and optionally filter the same, or can provide its own light source to improve the option of measuring eccentric photorefraction using the mobile computer device.

Abstract: A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described.

Abstract: A component for a mobile computer device, such as a smartphone, can be secured to the housing of the mobile computer device. The component can deflect the light of a built-in light source of the mobile computer device with an optical element and optionally filter the same, or can provide its own light source to improve the option of measuring eccentric photorefraction using the mobile computer device.

Abstract: A spectacle lens has a transparent substrate and at least one HOE-capable polymer layer arranged on the transparent substrate. The at least one HOE-capable polymer layer is suitable for forming a holographic optical element. Related methods and apparatus are described.

Abstract: Disclosed is a coupling device for coupling the imaging beam path between the inner surface and the outer surface of the eyeglass lens; and a decoupling structure-present in the eyeglass lens for decoupling the imaging beam path from the eyeglass lens in the direction of the eye. The coupling device couples the imaging beam path between the inner surface and the outer surface of the eyeglass lens such that the imaging beam path is guided to the decoupling structure via reflections between the inner surface and the outer surface. A beam-splitting structure is present between the display device and the area of the eyeglass lens, in which the first reflections occurs, said beam-splitting structure splitting the imaging beam path extending from the image generator into two partial imaging beam paths, which form the beam paths arriving from different directions on the partial structures of the decoupling structure.

Abstract: A component for a mobile computer device, such as a smartphone, can be secured to the housing of the mobile computer device. The component can deflect the light of a built-in light source of the mobile computer device with an optical element and optionally filter the same, or can provide its own light source to improve the option of measuring eccentric photorefraction using the mobile computer device.

Abstract: A spectacle lens is provided for an image-generating display device that can be fitted on the head of a user, wherein, in order to reduce vignetting occurring when guiding the generated image, which is coupled into the spectacle lens via the coupling-in section and guided through the spectacle lens by means of reflections as far as a coupling-out section, the curvature profile of the front and/or rear side in the edge area differs from the corresponding predetermined curvature profile of the front and/or rear side in the edge area such that there is a greater thickness of the spectacle lens in the edge area in comparison with the thickness in the edge area that would result due to the predetermined curvature profile.

Abstract: A spectacle lens for a display device that can be fitted on the head of a user and generate an image guides 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 by reflections on the rear side and a reflecting surface lying opposite this to the coupling-out section and coupling them out of the spectacle lens via the coupling-out section. A splitter layer reflects a portion of light bundles reflected by the rear side towards the rear side and transmits a portion, wherein after reflection on the rear side the reflected portion strikes the splitter layer again and there, once again, is partially reflected towards the rear side and partially transmitted. The transmitted portions strike the facets are coupled out of the spectacle lens through the splitter layer and the rear side.

Abstract: An imaging optical unit for generating a virtual image of an initial image represented on an image generator includes at least one spectacle lens, an input coupling device for coupling an imaging beam path emanating from the initial image in between the inner surface and the outer surface of the spectacle lens, and a Fresnel structure present in the spectacle lens for coupling the imaging beam path out from the spectacle lens in the direction of the eye. The input coupling device couples the imaging beam path in between the inner surface and the outer surface of the spectacle lens in such a way that it is guided by reflections between the inner surface and the outer surface to the Fresnel structure. The Fresnel structure has Fresnel surfaces, which bring about a base deflection of the rays of the imaging beam path by 45 to 55 degrees.

Abstract: A component for a mobile computer device, such as a smartphone, can be secured to the housing of the mobile computer device. The component can deflect the light of a built-in light source of the mobile computer device with an optical element and optionally filter the same, or can provide its own light source to improve the option of measuring eccentric photorefraction using the mobile computer device.

Abstract: A display device with a retaining device is disclosed, which can be placed on the head of a user. The display device contains a first image generator, which is secured or can be secured to the retaining device, and a first optical imaging system which is secured to the retaining device and which is designed to image an image generated on a first image plane (E) by the first image generator such that the user can perceive the image with a first eye (LA) when the retaining device is placed on the head of the user. The retaining device supports a first refraction determining optical system which is designed to determine the subjective refraction of the first eye (LA) when the retaining device is placed on the head of the user and/or the first optical imaging system is configured to be variable.

Abstract: Mobile computer devices and systems for refraction determination of an eye, for example for objective refraction determination and/or subjective refraction determination, are provided. Here, a display of the mobile computer device can be driven to display an image for refraction determination.

Abstract: A method for adjusting a display device with a holder that can be fitted on the head of a user includes a front section in which two spectacle lenses are arranged which are connected to each other via a central part, an imaging unit secured to the holder, which generates an image, and an imaging optical system secured to the holder which, when the holder is fitted on the head of the user, images the generated image into an exit pupil such that the user can perceive it as a virtual image with his first eye. The first spectacle lens with the coupling-out section is positioned in such a way that the exit pupil of the imaging optical system coincides at least partially with the pupil of the first eye of the user when the holder is fitted on the head of the user.