A head mounted display includes first and second light source modules, a light reversely turning module, an image output module, first and second eyepiece modules, and a beam splitting mirror. The first and second light source modules are respectively configured to emit first and second lights. The image output module is configured to receive the first and second lights, generating first and second image lights with corresponding image information respectively. The light reversely turning module is optically coupled between the first light source module (or the second light source module) and the image output module, making a propagating direction of the first light (or the second light) in reverse to that of the first image light (or the second light). The beam splitting mirror is optically coupled between the image output module and the first/second eyepiece module, guiding the first/second image light into the first/second eyepiece module.

Disclosed is an electronic device. In the electronic device according to the present disclosure, a central axis of a viewing angle based on an eye of a user and the central axis of the viewing angle based on a lens optical axis of a camera match each other. An electronic device according to the present disclosure may be associated with an artificial intelligence module, robot, augmented reality (AR) device, virtual reality (VR) device, and device related to 5G services.

An optical system employs a waveguide including a first set of partially-reflecting surfaces (“facets”) for progressively redirecting image illumination propagating from a coupling-in region towards a second region, and a second set of facets in the second region for progressively coupling-out the redirected image illumination towards the eye of a viewer. The first set of facets includes at least a first facet close to the coupling-in region, a third facet fare from the coupling-in region, and a second facet located on a medial plane between the first and the third facets. The second facet is located in a subregion of the medial plane such that image illumination propagating from the coupling-in region to the third facet passes through the medial plane without passing through the second facet.

An illumination unit is described that includes a first light source positioned on a first axis and a second light source on a second axis that intersects and is angularly offset with respect to the first axis. The illumination unit includes a reflector having an aperture through which the first axis extends and a reflective surface angled with respect to the first axis and second axis.

Provided is an optoelectronic light source that includes a plurality of semiconductor lasers each configured to emit a laser beam and arranged on a mounting platform, and a redirecting optical element configured to redirect the laser beams. The redirecting optical element includes for each one of the plurality of semiconductor lasers a separate reflection zone, the reflection zones are shaped differently from one another, and after passing the redirecting optical element, the laser beams run in a common plane.

An endoscope includes a four color separation prism having a first color separation prism, a second color separation prism, a third color separation prism, and a fourth color separation prism which respectively separate light incident from an affected area into a blue, red and green color components, and an IR component, first, second, third and fourth color image sensors, and a signal output. The first color separation prism, the second color separation prism, the third color separation prism, and the fourth color separation prism are sequentially disposed from an object side when receiving the light incident from the affected area. The first color image sensor is disposed opposite to the second color image sensor and the third color image sensor across an incident ray which is incident vertically to an object side incident surface of the first color separation prism.

An optically variable areal pattern has a reflection layer and a micromirror arrangement comprising a plurality of semitransparent micromirrors developed on the reflection layer. The micromirrors are inclined with respect to the reflection layer, such that, by specular reflection, light incident on the micromirror arrangement is reflected on the semitransparent micromirrors. The incident light is reflected partly in a first direction and partly in a second direction that is different from the first direction, in that it passes through the semitransparent micromirrors, impinges on the reflection layer, and is reflected there and, thereafter, again passes through the semitransparent micromirrors.

A light-source module includes a light-source unit, a first projection lens, a first lens, a mirror wheel, a first light-guiding unit, a second light-guiding unit, and a second projection lens. The first projection lens has an entrance pupil. The light beam provided by the light-source unit can pass through the first projection lens via the entrance pupil and then is guided to the mirror wheel. With the rotation of the mirror wheel, when the light beam passes through the mirror wheel, it becomes a transmission light beam. At different time, when the light beam is reflected by the mirror wheel, it becomes a reflection light beam. The second projection lens has a first exit pupil and a second exit pupil, in which the transmission light beam and the reflection light beam pass through the second projection lens via the first exit pupil and the second exit pupil, respectively.

An illumination unit is described that includes a first light source positioned on a first axis and a second light source on a second axis that intersects and is angularly offset with respect to the first axis. The illumination unit includes a reflector having an aperture through which the first axis extends and a reflective surface angled with respect to the first axis and second axis.

The invention relates to a mirror assembly (1) for producing a plurality of beam bundles (K1, K2, . . . Kn) from the beam of a light source (L), wherein the plurality of beam bundles comprises at least one first beam bundle (K1) having a first main beam direction (SR1), a second beam bundle (K2) having a second main beam direction (SR2), and preferably further beam bundles (K3 . . . Kn) having further main beam directions, which mirror assembly comprises the following features: a first mirror segment (1a) having a first focal point (F1), which first mirror segment converts a first partial region of the beam (S1) of the light source into the first beam bundle (K1), a second mirror segment (1b) having a second focal point (F2), which second mirror segment converts a second partial region of the beam (S2) of the light source into the second beam bundle (K2), and preferably further mirror segments (1c) having further focal points (F3 . . . Fn), which further mirror segments convert further partial regions of the beam of the light source into further beam bundles (K3 . . . Kn), wherein the back side of the mirror segments has a curvature having the radius R_s, which curvature is concentric to the light source.