Abstract: A light source apparatus includes a light source configured to emit first light, a wavelength converter configured to convert the first light into second light, an optical element disposed in an optical path of the first light to be incident on the wavelength converter, a light collector configured to collect the first light emitted from the optical element toward the wavelength converter, and a driver configured to rotate the optical element and the light collector around a rotation axis parallel to a first optical axis of the first light. The optical element has a first surface on which the first light is incident and a second surface via which the first light exits. The first light emitted from the light collector is incident on the wavelength converter along the second optical axis. The first optical axis and the second optical axis are shifted from each other.

Abstract: A wavelength conversion apparatus according to an aspect of the present disclosure includes a wavelength conversion layer that converts excitation light in terms of wavelength and an optical array layer formed of a plurality of cells each having a first surface on which light as a result of the wavelength conversion performed by the wavelength conversion layer is incident and a second surface via which the light exits. The optical array layer has a reflection surface that extends from the first surface to the second surface, is located at an interface between the cells adjacent to each other, and reflects the light.

Abstract: An illumination system including an excitation light source array, a multi-region dichroic device, a color sequence generator, and a wavelength converter is provided. The excitation light source array emits excitation light beams. The multi-region dichroic device has first dichroic regions and non-dichroic regions that are alternately arranged in stripe shapes. The first dichroic regions are respectively disposed on transmission paths of the excitation light beams. The excitation light beams from the excitation light source array are transmitted to the color sequence generator through the first dichroic regions of the multi-region dichroic device, and at least one second dichroic region of the color sequence generator respectively reflects the excitation light beams to the non-dichroic regions of the multi-region dichroic device. The excitation light beams from the color sequence generator are transmitted to the wavelength converter through the non-dichroic regions of the multi-region dichroic device.

Abstract: A directional illuminator includes a light source, a pupil-replicating lightguide, and a tiltable reflector coupling the light source to the pupil-replicating lightguide. The exit beam angle of the light outputted by the pupil-replicating lightguide follows the in-coupling angle, and accordingly depends on the tilting angle of the tiltable reflector. The directional illuminator with steered light beam may be used to illuminate a display panel. Steering the illuminating light by the tiltable reflector enables one to steer the exit pupil of the display device to match the user's eye location(s).

Abstract: An optical system is provided. The optical system includes a gaze tracker operative to track a gaze of a user and output data representative of the gaze and a correction portion including multiple spatially varying polarizers. A first polarizer of the spatially varying polarizers has a first control input configured to receive a first control signal indicating whether the first polarizer is to be active or inactive. The first polarizer, when active, provides a first optical correction on light passing through at a location corresponding to a first region of a virtual image. The optical system includes a controller configured to receive the data representative of the gaze, determine, based on the gaze, whether to implement the first optical correction on the light and in response to determining to implement the first optical correction on the light, output the first control signal indicating the first polarizer is to be active.

Abstract: A wavelength conversion element according to the present disclosure includes: a wavelength conversion layer; a first substrate; a second substrate; a first intermediate layer; and a second intermediate layer. A linear expansion coefficient of the first substrate is smaller than a linear expansion coefficient of the wavelength conversion layer. The linear expansion coefficient of the wavelength conversion layer is smaller than a linear expansion coefficient of the second substrate. The linear expansion coefficient of the first substrate is smaller than the linear expansion coefficient of the second substrate. A thermal conductivity of the first substrate is larger than a thermal conductivity of the wavelength conversion layer. A thermal conductivity of the second substrate is larger than the thermal conductivity of the wavelength conversion layer.

Abstract: A light source module includes a first light-splitting element, a second light-splitting element, a first light source, a second light source and a third light source. The first light source is configured to emit first light having a first wavelength to the first light-splitting element in a first optical path direction. The second light source is configured to emit second light having the first wavelength to the second light-splitting element in a second optical path direction opposite to the second optical path direction. The third light source is configured to emit third light having a second wavelength in a third optical path direction substantially perpendicular to the first optical path direction. The first light source includes a first reflective layer, the second light source includes a second reflective layer, wherein the first reflective layer and the second reflective layer are configured to reflect light having the first wavelength.

Abstract: An illumination system configured to provide an illumination beam is provided and includes a light-source module and a first and a second wavelength conversion devices. The light-source module provides a first and a second excitation beams. The first wavelength conversion device is disposed on a path of the first excitation beam and has first regions and at least one first boundary disposed between every two adjacent first regions. The second wavelength conversion device is disposed on a path of the second excitation beam and has second regions and at least one second boundary disposed between every two adjacent second regions. The second regions correspond to the first regions. A time point when the first boundary gets into the path of the first excitation beam is different from a time point when the second boundary gets into the path of the second excitation beam. A projection apparatus is also provided.

Abstract: An adjustment mechanism is adapted to fix and adjust an optical element. The adjustment mechanism includes a housing, a fixing member and an elastic member. The housing is adapted for accommodate the optical element, and has a side wall, and the side wall has a locking portion protruding outward. The fixing member is disposed beside the side wall. The fixing member has a joint portion. The elastic member is disposed between the fixing member and the housing. The elastic member has a first end and a second end relative to the first end. The first end is combined with the joint portion, and the second end is abutted against the side wall. The adjusting part passes through the opening and connects with the locking portion. A projection device is further provided. The adjustment mechanism and the projection device of the invention may improve the assembly process and reduce costs.

Abstract: A projection method, which is executed by a projection device, for projecting drawing data for a building onto a projection plane of the building under construction includes: measuring a distance from each of three or more points which are not aligned in a straight line and are on either of two non-parallel straight lines on the projection plane to the projection device using a distance meter included in the projection device; and projecting the drawing data onto a projection position on the projection plane which is determined based on the distance measured and the angle of the distance meter at the time at which the distance is measured.

Abstract: A light source module includes a light source, a fluorescent ring, a reflector, and a driving device. The light source is configured to emit light. The fluorescent ring has an inner surface. The reflector is configured to reflect the light to form a light spot on the inner surface. The driving device is configured to rotate the reflector to cause the light spot to move along a circular path on the inner surface.

Abstract: A projection system, including a projection target, a projection device, an image capturing device, and a processor circuit, is provided. The projection target includes a reflective surface and an anti-reflective film disposed on the reflective surface. The anti-reflective film defines a projection range. The image capturing device captures a first captured image containing the projection target. The first captured image includes an image of the anti-reflective film. The processor circuit determines a position and a shape of the anti-reflective film in the first captured image according to the first captured image. The projection device projects a projection image on the projection target. The projection device adjusts the projection image according to the position and the shape of the anti-reflective film, and correspondingly adjusts the projection image to the projection range. In addition, an image projection method is also provided.

Abstract: The disclosure relates to a projection device and a color gamut switching method thereof. The projection device includes a light source, a wavelength conversion element, an optical engine module, a projection lens module, and a filter element. The light source is configured to emit a first light beam. The wavelength conversion element is disposed on a transmission path of the first light beam, and the wavelength conversion element is configured to convert the first light beam into a second light beam. The optical engine module is disposed on a transmission path of the second light beam from the wavelength conversion element. The optical engine module is configured to convert the second light beam to form an image beam. The projection lens module is disposed on a transmission path of the image beam from the optical engine module. The filter element is removably disposed on the transmission path of the second light beam or the image beam.

Abstract: A projection apparatus includes an illumination system including a first laser light source and a second laser light source, a first light valve, and a second light valve. The first laser light source provides a first laser beam in first time periods. The second laser light source provides a second laser beam in second time periods. A color refresh rate of the projection apparatus is the number of times of alternating the first and second time periods with each other, and the color refresh rate ranges between 60 Hz and 6000 Hz. The first and second laser beams respectively form a first color light and a second color light when exiting the illumination system. The first and second light valves are located on a transmission path of the first color light. One of the first and second light valves is located on a transmission path of the second color light.

Abstract: An exemplary laser light source system of a modular high-efficiency heat-dissipation uniform field is described. The light beam emitted by the blue laser light source is incident to the reflecting-blue transmitting-yellow beam combining mirror after passing through the scattering plate, and then is incident to the fluorescent unit through the lens group. The light beam generated after the excitation of the fluorescent unit is incident to the light pipe through the lens group I, the reflecting-blue transmitting-yellow beam combining mirror, the reflecting-red transmitting-blue-green beam combining mirror and the lens group II in sequence. The laser light source system of a modular high-efficiency heat-dissipation uniform field can effectively dissipate the heat generated by the laser, and obtain uniform picture projection output at the same time, which has a good practical application value.

Abstract: Augmented reality glasses including a first image source, a second image source and a lens set are provided. The first image source emits a first image beam. The second image source emits a second image beam. The lens set includes a first lens and a second lens and disposed on the path of the image beams. A gap is disposed between the first lens and the second lens. The refractive index of the gap is lower than that of the first lens. The image beams enter the lens set at an incident surface of the lens set, are reflected at a first surface of the first lens, and exit the lens set at an exit surface. The optical path length of the first image beam from the first image source to the eyes is different from that of the second image beam from the second image source to the eyes.

Abstract: A scanning laser projector includes an optical module and projection engine. The optical module includes a laser generator outputting a laser beam, and a movable mirror scanning the laser beam across an exit window defined through the housing in a scanning pattern wider than the exit window such that the laser beam is directed through the exit window in a projection pattern that is smaller than and within the scanning pattern. A first light detector is positioned about a periphery of the exit window such that as the movable mirror scans the laser beam in the scan pattern, at a point in the scan pattern where the laser beam is scanned across an interior of the housing and not through the exit window, the laser beam impinges upon the first light detector. The projection engine adjusts driving of the movable mirror based upon output from the first light detector.

Abstract: Disclosed are a light source system and a display device, including: a first light source configured to emit first light; a second light source configured to emit second light; a wavelength conversion device configured to perform a wavelength conversion on the first light to obtain third light; a first optical splitter having a first area and a second area; and a first light combining device. The first optical splitter moves in timing sequence to make the first area and the second area be sequentially located on a preset light path. A side surface of the first optical splitter is configured to homogenize the first light and the second light that are emitted to the first light combining device; and the first light combining device is configured to guide the first light, the second light, and the third light to exit along a same light path to form illumination light.

Abstract: A light-source device includes an excitation light source; a wavelength conversion unit to convert at least some of first color light into second color light; a light mixing element including a rod integrator to mix at least one of the first color light and the second color light from the conversion unit; and an optical element on an optical path of the first color light and having a reflecting surface. A center of the first color light on the reflecting surface intersects with only one of a first light flux of the first color light incident on and a second light flux of the first color light emitted from the conversion unit. An angle formed by a projection straight line of the first color light incident on an incident aperture of the integrator and a predetermined axial line of the incident aperture of the integrator is smaller than 40°.

Abstract: An interference lens and a projection ambient lamp are provided. The interference lens includes: an interference sheet with a first surface and a second surface opposite to the first surface, the first surface being a rough surface; and a reflective film provided at the interference sheet; wherein light is reflected by the reflective film to form an interference pattern. The projection ambient lamp includes the foregoing interference lens, a light source and a focusing lens; light emitted from the light source passes through the interference lens and is reflected by the reflective film to form an interference pattern, which is focused by the focusing lens and projected on a medium. The present disclosure realizes simplification of the structure by providing a reflective film at the interference lens, hence utilization of light energy is higher, power consumption is lower, manufacturing cost is lower, and projection effect is better.