Abstract: An apparatus for supplying energy to an active eye implant can include a beam expander that includes a first expansion element and a second expansion element. The second expansion element can be configured to provide light that has been expanded twice and is effectively focused. A processes for manufacturing apparatuses for supplying energy to an active eye implant can be based on head geometry data of a user.

Abstract: A screen includes a transparent base body with a front face and a rear face, and an image sensor. The base body includes a coupling-in region and a coupling-out region at a distance therefrom in a first direction. The coupling-in region includes a diffractive structure which deflects only part of the radiation incident on the front face and originating from an object to be detected, such that the deflected part is propagated as coupled-in radiation in the base body by reflection, until it reaches the coupling-out region and is incident on said coupling-out region, and the coupling-out region deflects at least part of said incident coupled-in radiation, such that the deflected part exits the base body via the front face or the rear face and is incident on the image sensor.

Abstract: An optical system comprises an imaging holographic optical element, which produces a floating hologram. An upstream light-forming holographic optical element causes spectral filtering of the light.

Abstract: An imaging apparatus has a plurality of light-emitting elements arranged in a first direction along a line for generating a plurality of modulated light beams wherein the plurality of light-emitting elements comprises a plurality of optical elements, which are arranged in the first direction, and a laser projector apparatus for scanning the optical elements in the first direction. A deflection apparatus is included for adjustably deflecting the plurality of modulated light beams in a second direction, wherein the second direction differs from the first direction; and wherein the deflection apparatus comprises a rotating element and the optical elements are arranged on the rotating element.

Abstract: An optical system (10) for use in an underwater environment is proposed, wherein the optical system (10) comprises a housing which delimits an interior (60) of the optical system (10) with respect to the surroundings (50) in water-tight fashion, and a lens (20) with an outer surface (24), wherein the housing comprises a mount (40), wherein the lens (20) is received in the mount (40) in such a way that the outer surface (24) of the lens (20) is in fluid contact with water of the underwater environment when the optical system (10) is situated in the underwater environment, wherein the outer surface (24) of the lens (20) has an arched form, in particular a convex form, preferably a spherical convex form, wherein the lens (20) has a first arched contact face (28), in particular a spherical contact face, and the mount (40) has a second contact face (48), wherein the lens (20) is arranged in the mount (40) in such a way that the first contact face (28) presses against the second contact face (48) when the pressure

Abstract: An optical system comprises a plurality of optical channels. A control unit can switch light sources of the optical channels separately on and off. In this way, different image motifs of a hologram can be illuminated by a number of different illumination sources of at least one imaging holographic optical element.

Abstract: An immersion oil for microscopy contains a) a first diester A1 based on a tricyclodecane radical K having one functional group and a first hydrocarbon derivative C1 having two functional groups, and b) a second diester A2 based on the tricyclodecane radical K having one functional group and a second hydrocarbon derivative C2 having two functional groups, where C1 and C2 are different. Methods can be used for the production of the immersion oil and for the use thereof in microscopy.

Abstract: In a base element of a waveguide for a detector system at least one portion of radiation passing via the front side and impinging on a diffractive element in the display region is deflected via the diffractive element according to the selection region. The deflected portion is propagated as coupled-in radiation via reflection to an out-coupling region and impinges on the associated out-coupling section of the out-coupling region. The portion of radiation coupled out by an out-coupling section impinges on an associated sensor section of the sensor unit, which continuously measures the intensity of the impinging radiation and supplies the control unit, wherein, according to a change of intensity, which is dependent on positioning an object in front of the front side of the base element and in front of a selection region of the display region, the control unit determines whether the one selection region has been selected.

Abstract: A device for data projection, includes a holographic element arranged as a imaging element for a windshield. An imaging device has a first imaging system and a second imaging system configured to illuminate the holographic element. The holographic element has a first volume hologram structured to be angle-selective for light under a first illumination angle and to generate a first two-dimensional virtual image at a first fixed distance from the holographic element corresponding to the first image data, and a second volume hologram structured to be angle-selective for light under a second illumination angle and to generate a second two-dimensional virtual image at a second fixed distance from the holographic element different from the first distance corresponding to the second image data, such that the first and second images are viewable separately and simultaneously by a person.

Abstract: An immersion liquid, especially for microscopy, contains one or more acetals of tricyclodecane alcohols as its main constituent, wherein a tricyclodecane alcohol is a compound of which the structure has the base skeleton of tricyclo[5.2.1.02,6]decane and at least one OH group, and wherein all OH groups of the tricyclodecane alcohol have been acetalized in the acetal. Also described are 3(4),8(9)-bis(tetrahydropyran-2-yloxymethyl)tricyclo[5.2.1.02,6]decane or 8-tetrahydropyran-2-yloxymethyltricyclo[5.2.1.02,6]decane and the preparation thereof, and the use of acetals of tricyclodecane alcohols as the main constituent of an immersion liquid. A process for preparing an acetal of a tricyclodecane alcohol involves reacting a tricyclodecane alcohol with an acetalizing agent in the presence of an acid.

Abstract: A lab-on-a-chip system (100) comprises an optical detection waveguide (122) that has an at least partially periodic structure (123, 501, 502, 503, 504) that is configured to couple light (152) from surroundings of the optical detection waveguide (122) into the optical detection waveguide (122). The lab-on-a-chip system (100) furthermore also comprises a microfluidic network (212), wherein the microfluidic network (212) has multiple lines and at least one reaction chamber (211, 211-1, 211-2, 211-3).

Abstract: A functionalized waveguide for a detector system includes an incoupling region of a main body that deflects only part of the radiation coming from an object to be detected and impinges on the front face such that the deflected part propagates as coupled-in radiation in the main body by reflections up to the decoupling region and impinges on the decoupling region. A decoupling region deflects at least part of the coupled-in radiation impinging thereon such that the deflected part exits the main body via the front or rear face to impinge on the detector system. The extent of the incoupling region in a second direction transverse to the first direction is greater than the extent of the decoupling region in the second direction. In the second direction, the incoupling region has at least two different diffractive incoupling structures which have a different deflection component in the second direction.

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: The invention relates to techniques for material testing of optical test pieces, for example of lenses. Angle-variable illumination, using a suitable illumination module, and/or angle-variable detection are carried out in order to create a digital contrast. The digital contrast can be, for example, a digital phase contrast. A defect detection algorithm for automated material testing based on a result image with digital contrast can be used. For example, an artificial neural network can be used.

Abstract: A device for data projection, comprising a holographic element to be arranged by a windshield. An imaging device comprising a first imaging system is arranged at a first angle with respect to the holographic element and configured to illuminate the holographic element at a first illumination angle with first illumination light modulated with first image data. A second imaging system is arranged at a second angle with respect to the holographic element and configured to illuminate the holographic element at a second illumination angle different from the first illumination angle with second illumination light modulated with second image data such that on the holographic element the first illumination light overlaps with the second illumination light.

Abstract: A projection system can include a first modulator including a plurality of pixels in a first modulator surface, a second modulator including a plurality of pixels in a second modulator surface, and an intermediate imaging optical unit, which images the first modulator surface onto the second modulator surface, wherein the intermediate imaging optical unit includes a first lens having a convex side and wherein the convex side of the first lens is a free-form surface, which is not spherical and not rotationally symmetric and does not exhibit any mirror symmetry.

Abstract: A lighting device is provided, comprising a spatially extended light source with a light-emitting surface greater than 0.5 mm2 and also an aspherical TIR lens, which is configured to collimate light from the spatially extended light source, and a refractive diffuser configured to generate a lighting distribution on the basis of the collimated light.

Abstract: A lighting device (31), in particular a rear luminaire, for a vehicle (30) is provided. The lighting device (31) has a hologram (34) and a light source (32) for illuminating the hologram (34). An image, more particularly a real image (35), is thereby generated, which can also lie outside the physical boundaries of the lighting device (31).

Abstract: A light guide for guiding light for an HMD includes at least one input coupling structure and at least one output coupling structure. The output coupling structure can be oriented such that for all the rays that are coupled out by the output coupling structure and for which the wave vector k has a negative ratio ky/kxz after they have been coupled out, the wave vector k in the light guide has a ratio of ky/kxz of greater than ?0.2, and/or that for all the rays that are coupled out by the output coupling structure and for which the wave vector k has a positive ratio ky/kxz after they have been coupled out, the wave vector k in the light guide has a ratio of ky/kxz of less than +0.2.

Abstract: Provided is a waveguide arrangement, comprising a diffractive input coupling element (11), in particular a volume hologram, a diffractive output coupling element (13), in particular a volume hologram, and optionally a beam expansion element (12), in particular a volume hologram. The expansion element (12) and the output coupling element (13) expand a light beam in different directions.