Abstract: A light-emitting device, having a laser light device that is designed to emit a multiplicity of laser light beams. Ellipticities of beam cross-sections of the laser light beams differ at least partly from one another. The light-emitting device includes a beamforming device that is introduced into the beam path of at least one of the laser light beams and that is designed to adapt the ellipticities of the beam cross-sections of the laser light beams to one another, and a beam-combining device that is designed to combine the laser light beams to form an overall light beam, after the adapting of the ellipticities of the beam cross-sections by the beamforming device.

Abstract: A method for actuating an actuable deflection device of an optical system for a virtual retinal display. A first eye status of the user of the virtual retinal display, detected and/or determined using an eye status detection device of the optical system, is received by way of a control unit of the optical system at a first time. In addition, first actuation signals are generated for the actuable deflection device using the control unit, in such a way that the scanning region of the deflection device is adjusted in accordance with the detected and/or determined first eye status of the user.

Abstract: An optical system for a virtual retinal scan display. The system includes: an image source providing image content as image data; an image-processing device; a projector unit for generating at least one light beam, and having a controllable deflecting device for the at least one light beam for the scanning projection of the image content; a diverting unit, onto which the image content is projected, equipped to direct the projected image content onto an eye of a user; an optical segmentation element using which the image content is projectable via different imaging paths onto at least one projection region of the diverting unit, at least individual imaging paths being controllable individually; and an optical replication component equipped to direct the projected image content, replicated and spatially offset, onto the eye of the user, so that a plurality of mutually spatially offset exit pupils having the image content is produced.

Abstract: A method for ascertaining a diffraction characteristic of a hologram element for smart glasses. The method includes a step of outputting a light beam to an observation position on the hologram element by means of a light source, the light beam having at least one predefined wavelength and at least one sending parameter associated with the wavelength. The method also comprises a step of acquiring at least one reflection beam reflected at the observation position and/or transmission beam of the light beam having the predefined wavelength and transmitted through the hologram element at the observation position using at least one detector, wherein a detection parameter of the reflection beam and/or of the transmission beam is acquired at the predefined wavelength, and a step of comparing the sending parameter with the detection parameter in order to ascertain the diffraction characteristic of the hologram element at the observation position.

Abstract: An optical system for a virtual retinal scan display. The optical system includes an image source which supplies image data, an image processing device for the image data, a projector unit having a light source modulatable in time for generating a light beam, and an actuable refraction device for the light beam for the scanning projection of the image content, a deflection unit onto which the image content is able to be projected and which is designed to guide the projected image content onto an eye of a user, and an adaptive optical element for modifying a beam divergence, which is situated in the optical path between the light source and the deflection unit. The adaptive optical element is able to be actuated so that the beam divergence of the light beam is variable as a function of the angle of incidence of the light beam on the deflection unit.

Abstract: A light-emitting device, having a laser light device that is designed to emit a multiplicity of laser light beams. Ellipticities of beam cross-sections of the laser light beams differ at least partly from one another. The light-emitting device includes a beamforming device that is introduced into the beam path of at least one of the laser light beams and that is designed to adapt the ellipticities of the beam cross-sections of the laser light beams to one another, and a beam-combining device that is designed to combine the laser light beams to form an overall light beam, after the adapting of the ellipticities of the beam cross-sections by the beamforming device.