Abstract: A wavelength conversion device in which a wavelength conversion element less easily comes off a substrate. A wavelength conversion device includes a substrate capable of rotating around a rotation axis, a wavelength conversion element provided around the rotation axis on one surface side of the substrate, and a fixing member that fixes the wavelength conversion element to the substrate. The wavelength conversion element includes a first surface opposed to the one surface of the substrate, a second surface on the opposite side of the first surface, and a first side surface section that connects the first surface to the second surface. The fixing member is in contact with the first side surface section in at least a part of the first side surface section when viewed from a direction parallel to the rotation axis.

Abstract: A stereoscopic image apparatus that is capable of minimizing loss of optical energy and improving quality of a stereoscopic image is disclosed. The stereoscopic image apparatus includes a polarizing beam splitter to reflect or transmit incident light based on polarization components of the light to split the light in at least three different directions, a reflective member to reflect the light reflected by the polarizing beam splitter to a screen, at least one modulator to modulate the light reflected by the reflective member and the light transmitted through the polarizing beam splitter, and a refractive member disposed in an advancing direction of light to be incident upon the polarizing beam splitter to refract the light to be incident upon the polarizing beam splitter.

Abstract: Disclosed is a lighting assembly including a plurality of Light Emitting Diodes (LEDs) for providing a projection of a substantially uniform light at a working distance from the lighting assembly by oscillating the included plurality of LEDs.

Abstract: A rear adapter module for a finite conjugate optical assembly and camera is configured to couple with a core zoom module. A lens assembly of the rear adapter module includes three or more lens elements and has a positive focal length. The lens assembly exhibits a pupil size of between 16 and 25 mm and a pupil depth greater than 50 mm.

Abstract: An image guide comprising glass or plastic planar substrate, a first hologram area, a second hologram area, and a third hologram area which are formed on the substrate as surface relief grating, period and direction of diffraction structure of the first, second, and third hologram areas have a relationship which is a sum of grating vectors of the first, second, and third hologram areas becomes zero, depth of diffraction structure on the first hologram area is a uniform in the own hologram area, and depth of diffraction structure on the second or third hologram area is chirped in the own hologram area increases luminance and uniformity of virtual image.

Abstract: An imaging module includes a display element, a prism and an image displacement device. The display element includes an active display surface. The prism includes an optical surface. The image displacement device is disposed between the display element and the prism. The image displacement device includes an optical element, a carrier, a base and at least one actuator. The optical element is disposed on the carrier. The at least one actuator drives the optical element on the carrier to swing relative to the base.

Abstract: A wavelength conversion element includes a wavelength conversion layer which has a first face on which an excitation light is incident and a second face facing the first face, a first layer which is provided facing the second face and contains a first inorganic oxide, a second layer which is provided facing the first layer and contains a first metal or a second inorganic oxide that is different from the first inorganic oxide, and a third layer which is provided facing the second layer, contains either silver or aluminum, and reflects the excitation light or a light obtained by wavelength conversion of the excitation light by the wavelength conversion layer.

Abstract: An optical system comprises a first optical module and a second optical module. A tensioned element includes an upper segment attached to the first optical module and a lower segment attached to the second optical module. Movement of the tensioned element thus generates opposing movement of the first and second optical modules, the first optical module moving in a direction parallel to a direction of movement of the upper segment, and the second optical module moving in a direction parallel to a direction of movement of the lower segment.

Abstract: A projector includes a first circulation channel formed in a sealed space and where a first fluid for cooling a cooling target arranged within the sealed space circulates, a second circulation channel where a second fluid to which heat is conducted from the first fluid circulates, and a third circulation channel where a third fluid to which heat is conducted from the second fluid circulates and where the heat conducted to the third fluid is radiated in a process of circulation of the third fluid. The first fluid is gas. The second fluid and the third fluid are liquid.

Abstract: An oscillating mirror element includes a mirror portion, a drive portion that drives the mirror portion, a strain sensor capable of detecting an amount of displacement of the mirror portion, and a base including a mirror beam portion provided with the mirror portion, a sensor beam portion provided with the strain sensor, and a body portion that supports the mirror beam portion and the sensor beam portion and is provided with the drive portion.

Abstract: An imaging module includes a display element and an image displacement device. The display element includes an active display surface adapted to receive an illumination beam, convert the illumination beam into an image beam, and transmit the image beam. The image displacement device includes an optical element located on a transmission path of the image beam and adapted to allow the image beam to pass therethrough, a carrier, a base and at least one actuator, wherein the optical element is disposed on the carrier, the at least one actuator is disposed on the base, one end of the at least one actuator is connected to the carrier to drive the optical element on the carrier to swing relative to the base, and an orthographic projection area of the at least one actuator on a reference plane does not overlap with an orthographic projection area of the active display surface.

Abstract: A projection device, includes a housing including an opening, a projection lens disposed in the housing, a lens cover module including a lens cover, and a Hall switch including a Hall sensor and a magnet. The lens cover shields the opening when the lens cover is in the closed position, and the housing exposes the opening and exposes the projection lens when the lens cover is in the open position. The Hall sensor is disposed on one of the housing and the lens cover, and the magnet is disposed on the other one of the lens cover and the housing corresponding to the Hall sensor. The Hall switch generates a first control signal when the lens cover is moved from the closed position to the open position. The Hall switch generates a second control signal when the lens cover is moved from the open position to the closed position.

Abstract: A projection apparatus includes a light source unit which time-divisionally emits light in colors by light emission from light emitting devices; a display element using light emitted from the light source unit, displaying images respectively corresponding to the colors of the emitted light, and forming optical images by reflection or transmission light thereof; a projection unit emitting the optical images formed by the display element toward a projection target; a timing setting unit setting a change timing associated with changing each of the colors, and setting spoke periods generated at each change timing; a light source drive unit driving the light source unit, based on the change timings and spoke periods; a detection unit detecting information indicating a light amount of the light for each of the colors emitted from the projection unit during the spoke periods; and a light source controller setting a delay time for light emission timings at the light source unit in the spoke periods by the light sourc

Abstract: A light emitting device uses optical elements each formed of a plurality of small lenses. On that basis, the array pitch of the plurality of small lenses is set within a predetermined numerical range determined based on a proportional relationship between two values with respect to the focal distance of a collimator.

Abstract: A lighting apparatus includes a laser source configured to emit a laser beam, a homogenizer optical element that includes a light flux dividing section disposed to face the laser source, configured to divide the laser beam into a plurality of separate laser beams in a plane and make advancing directions of the plurality of separate laser beams different from each other, and a light flux superimposing section formed integrally with the light flux dividing section and superimposing the plurality of separate laser beams on each other in a common radiation region, and a fluorescent material disposed to face the homogenizer optical element, excited by the plurality of separate laser beams superimposed in the radiation region using the light flux superimposing section so as to emit fluorescence.

Abstract: An image display apparatus includes an image forming unit and a vehicle provided with the image display apparatus. The image forming unit includes a light source unit configured to emit light, an optical scanner configured to scan the light emitted from the light source unit two-dimensionally in a main scanning direction and a sub-scanning direction, and an intermediate image forming unit configured to form an intermediate image by the light scanned by the optical scanner. The image forming unit satisfies 0.3<Rm/L<3, where Rm denotes a radius of curvature of the intermediate image forming unit in the main scanning direction, and L denotes distance between a reference point when the optical scanner deflects and scans the light and a center of the intermediate image formed on the intermediate image forming unit. In the vehicle, the image display apparatus indicates the intermediate image to a driver as a virtual image.

Abstract: Disclosed is a lighting assembly including a plurality of Light Emitting Diodes (LEDs) for providing a projection of a substantially uniform light at a working distance from the lighting assembly by oscillating the included plurality of LEDs.

Abstract: A projector, comprising a housing (100) and a machine body provided inside the housing (100). A supporting piece (200) is connected to the housing (100) via a connection mechanism, and the supporting piece (200) can be converted between a first position and a second position under the limiting action of the connection mechanism. The supporting piece (200) is attached to a surface of the housing (100) at the first position, and a projection element is triggered at the same time to enable the machine body to be in a first working state. The supporting piece (200) departs from the surface of the housing (100) at the second position and drives the housing (100) to change a projection elevation thereof with respect to a horizontal plane, and the projection element is triggered at the same time to enable the machine body to be in a second working state, thereby controlling the working states of the machine body on the premise of free adjustment of a projection angle.

Abstract: A projection optical system (2) projects from a DMD (7) on a reducing side onto a screen (9) on an enlargement side, and includes: a first refractive optical system (10) that forms a first intermediate image (51) on the enlargement side using light incident from the reducing side; a second refractive optical system (20) that forms the first intermediate image (51) on the reducing side into a second intermediate image (52) on the enlargement side; and a first reflective optical system (30) including a first reflective surface (31a) with positive refractive power that is positioned on the enlargement side of the second intermediate image (52), wherein the second refractive optical system (20) includes a first focus lens group (61) that moves when focusing is carried out, and the first focus lens group (61) includes at least one lens (L13) included in the second refractive optical system (20).

Abstract: A color wheel includes a base substrate and at least one fluorescent block. The base substrate includes a first annular portion and a second annular portion. The at least one fluorescent block is arranged on the first annular portion. The fluorescent block is configured to emit fluorescent light in a predetermined wavelength band after being irradiated with a laser beam. The second annular portion includes at least one color filtering portion, and the color filtering portion is configured to filter the fluorescent light. An inner circumference of the second annular portion is not smaller than an outer circumference of the first annular portion, or an outer circumference of the second annular portion is not larger than an inner circumference of the first annular portion.