A light fixture for lighting a surface includes a housing, a plurality of light sources, and a molded optic through which light from the light sources is directed. The molded optic further includes a plurality of concave aspheric optical surfaces in a first side of the molded optic, each of the concave aspheric optical surfaces partially enclosing one or more of the plurality of light sources, wherein the aspheric concave optical surfaces receive light directly from the respective light sources, and a plurality of convex aspheric optical surfaces disposed respectively opposite the plurality of concave aspheric optical surfaces on a second side of the molded optic, opposite the first side. The light sources and the aspheric optical surfaces cooperate to direct light onto the surface in an illumination field that is generally rectangular.

A display device configured to show an image inside an instrument panel for a vehicle includes: a light source configured to emit light; and a light guide element configured to guide incident light from the light source. The light guide element includes: an emission surface configured to output incident light; and a plurality of light focusing portions configured to change the path of the incident light toward the emission surface, causing the light output to converge toward a convergence point or convergence line outside the light guide element or to radiate from a convergence point or convergence line outside the light guide element and thereby form an image outside the light guide element. The light guide element is configured to form light to thereby present an image.

Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical device comprises an optical waveguide including a volume of optically transparent material having a first longitudinal surface positioned opposite a second longitudinal surface across a width of the volume, an in-coupler, a liquid crystal out-coupler, and a controller to modulate a refractive index of the liquid crystal out-coupler. Light is in-coupled into the waveguide and is propagated along a length of the waveguide by total internal reflection between the longitudinal surfaces before being out-coupled by the liquid crystal out-coupler on a path that is dependent on the modulated refractive index of the liquid crystal out-coupler. In this way, light signals can be steered to create an image and/or to move an exit pupil of an image. WHUDs that employ such optical waveguides are also described.

A head-up display (1) has a housing (2) with a housing lower part (3) and a housing upper part (4). The housing upper part (4) has a cover pane (5) designed for a projection. The housing (2) can be fastened to a body component (11) via a fastening system (7) that forms form a releasable connection both to the housing (2) and to the body component (11). The fastening system (7) has first passage openings (17) for the installation on the housing (2) and second passage openings (19) for the installation on the body component (11). The passage openings (17, 19) are elongated holes that receive pin-shaped fixing elements (8) to achieve the connection to the housing (2) and to the body component (11). An installation gauge for a head-up display and a gauging method for a head-up display also are provided.

Systems and methods of dispersion compensation in an optical device are disclosed. A holographic optical element may include a set of different holograms in a grating medium. Each hologram in the set may have a corresponding grating vector with a grating frequency and direction. The directions of the grating vectors may vary as a function of the grating frequency. Different holograms in the set may diffract light in a particular direction so that the light emerges from a boundary of the grating medium in a single given direction regardless of wavelength. A prism may be used to couple light into the grating medium. The prism may be formed using materials having dispersion properties that are similar to the dispersion properties of the grating material. The prism may have an input face that receives perpendicular input light. The prism may include multiple portions having different refractive indices.

A luminaire comprises a frame and a plurality of optical waveguides retained by the frame. The optical waveguides bound a cavity, and each comprises: a top end and a bottom end opposite the top end; a coupling portion disposed at the top end; an inner side facing the cavity; and an outer side opposite the inner side. The inner and outer sides are disposed between the top and bottom ends. The luminaire further comprises at least one light emitting diode (LED) associated with each optical waveguide. Each of the LEDs are disposed opposite, and configured to direct light into, the coupling portion of the associated optical waveguide. Each optical waveguide is configured to receive the light via the coupling portion and emit the light primarily from the outer side.

Systems, devices, and methods for for exit pupil expansion in a curved lens with embedded light guide are described. Exit pupil expansion in a curved lens may be achieved with a light guide comprising an outcoupler with minimized second order diffraction, where the outcoupler applies an optical power to outcoupled light.

Systems and methods of dispersion compensation in an optical device are disclosed. A holographic optical element may include a set of different holograms in a grating medium (704). Each hologram in the set may have a corresponding grating vector (708, 710, 712) with a grating frequency and direction. The directions of the grating vectors may vary as a function of the grating frequency. Different holograms in the set may diffract light in a particular direction so that the light emerges from a boundary of the grating medium in a single given direction regardless of wavelength. A prism (722) is used to couple light into the grating medium. The prism is formed using materials having dispersion properties that are similar to the dispersion properties of the grating material but not indentical. The prism may have an input face that receives perpendicular input light. The prism may include multiple portions having different refractive indices.

Systems, devices, and methods for optical waveguides that are well-suited for use in wearable heads-up displays (WHUDs) are described. An optical device comprises an optical waveguide including a volume of optically transparent material having a first longitudinal surface positioned opposite a second longitudinal surface across a width of the volume, a liquid crystal in-coupler, a controller to modulate a refractive index of the liquid crystal in-coupler, and an out-coupler. Light is in-coupled into the waveguide on a path that is dependent on the modulated refractive index of the liquid crystal in-coupler and is propagated along a length of the waveguide by total internal reflection between the longitudinal surfaces before being out-coupled by the out-coupler. In this way, light signals can be steered to create an image and/or to move an exit pupil of an image. WHUDs that employ such optical waveguides are also described.

A DEVICE FOR MULTI-PLANE CONVERSION OF A FIRST LIGHT RADIATION, HAVING A CONVERSION BLOCK COMPRISING A PLURALITY OF OPTICAL PARTS AND IMPLEMENTING A PLURALITY OF PHASE MASKS TO APPLY A SPATIOFREQUENTIAL PHASE SHIFT FOR PRODUCING A SECOND LIGHT RADIATIONA PREDETERMINED TRANSFORMATION, KNOWN AS A TRANSFORMATION WITH SEPARABLE VARIABLES. THE PREDETERMINED TRANSFORMATION MAY LINK N MODES OF INDEX {I, J}.sub.K, 1<=K<=N, OF A FIRST USED MODE FAMILY WITH SEPARABLE SPATIAL VARIABLES (X,Y) DESCRIBING THE FIRST LIGHT RADIATION IN A FIRST TRANSVERSE PLANE WITH N MODES OF THE SAME INDEX {I, J}.sub.K 1<=K<=N, OF A SECOND USED MODE FAMILY WITH SEPARABLE SPATIAL VARIABLES (X,Y) DESCRIBING THE SECOND LIGHT RADIATION AT A SECOND TRANSVERSE PLANE. THE N MODES OF THE SECOND MODE FAMILY ARE NOT BE HERMITE-GAUSSIAN MODES. THE N MODES OF THE FIRST MODE FAMILY ARE NOT ARRANGED ON THE FIRST TRANSVERSE PLANE IN THE FORM OF A TRIANGLE.