Abstract: An illumination system including a laser light source module, a wavelength conversion module and a control module is provided. The laser light source module simultaneously emits a first and second laser light beams, where a peak wavelength of the first laser light beam is greater than that of the second laser light beam. The control module is connected to the laser light source module and the wavelength conversion module, respectively. In a first time interval, the control module controls an amount of luminous flux of the first laser light beam to be greater than an amount of luminous flux of the second laser light beam. In a second time interval, the control module controls the amount of luminous flux of the first laser light beam to be smaller than the amount of luminous flux of the second laser light beam. A projection apparatus and an illumination control method are provided.

Abstract: The present disclosure describe embodiments of a laser projection apparatus. The apparatus includes: an apparatus housing, a laser source system, an optical illumination system and a lens system. The laser source system includes: a first laser assembly configured to emit a first laser beam, a second laser assembly configured to emit a second laser beam and a third laser assembly configured to emit a third laser beam; a first laser combining lens configured to reflect the third laser beam; a second laser combining lens configured to transmit the second laser beam and reflect the third laser beam; and a third laser combining lens configured to transmit the first laser beam and reflect the second and third laser beams. The optical illumination system is configured to modulate laser beams to generate a modulated beam. The lens system is configured to project the modulated beam onto a projection screen.

Abstract: An optical system includes a light source, an illumination optical system, and an optical modulator. The lens array and the lens of the illumination optical system are arranged in that order from an upstream side of an optical path of light from the light source. The light shield is disposed at the upstream side relative to the lens in the optical path. The light shield blocks some rays incident within a range of an effective diameter of the lens. The illumination optical system emits the light to the optical modulator. The optical modulator emits the incident light to a first direction and a second direction different from the first direction. A center of an effective diameter of the lens array is offset from a center of the effective diameter of the lens to an opposite side of the light shield in a direction orthogonal to the optical axis.

Abstract: An improved virtual reality system comprising an immersive sound system, sensors, a power source, communications, data processing, and an optical system that delivers photoreceptor density resolution, wide angle, high contrast, binocular vision, continuous depth of field, and stabilized images that are closely synchronized with the vestibulo-ocular reflex, providing a comfortable, fully immersive experience. In one embodiment, a miniaturized array of projectors is arranged to cover the retina with adjoining image segments. Each projector provides full spectrum, amplitude modulated, and controllably divergent beams of light that are subsequently reflected off a compound curved reflector, through additional optics, and along reversible light paths to form images on the retina.

Abstract: A projection optical system has first and second optical systems disposed in order from a demagnification side toward a magnification side. An intermediate image is formed between demagnification-side and magnification-side imaging surfaces. The second optical system is an optical element having first transmission, reflecting, and second transmission surfaces in order from the demagnification toward the magnification sides. The first transmission and reflecting surfaces are located at one side with respect to an optical axis. The second transmission surface is located at the other side with respect to the optical axis. The reflecting surface has a concavely curved surface shape. The second transmission surface has a convexly curved surface shape protruding toward the magnification side. The optical element has a first member and a second member different in refractive index from the first member. A bonding surface between the first member and the second member has a curved surface shape.

Abstract: A projection optical system has a first optical system and a second optical system. The first and second optical systems are disposed in order from a demagnification side toward a magnification side. An intermediate image is formed between a demagnification-side imaging surface and a magnification-side imaging surface. The second optical system is an optical element having a first transmission surface, reflecting surface, and second transmission surface in order from the demagnification side toward the magnification side. The first transmission surface and reflecting surface are located at one side, and the second transmission surface is located at the other side with respect to the optical axis. The reflecting surface has a concavely curved surface shape. The second transmission surface has a convexly curved surface shape protruding toward the magnification side. The optical element has a first member and a second member different in refractive index.

Abstract: A projection system has a first optical system and a second optical system arranged on a magnifying side of the first optical system. The projection system forms an intermediate image in a position between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is an optical element having a first transmissive surface, a reflective surface, and a second transmissive surface arranged from a demagnifying side toward the magnifying side. The first transmissive surface and the reflective surface are located at one side with respect to an optical axis. The second transmissive surface is located at another side with respect to the optical axis. The reflective surface has a concavely curved shape. The second transmissive surface has a convexly curved shape protruding toward the magnifying side.

Abstract: A projector includes a main body and a projection lens. The main body includes a light source, liquid crystal panels that modulate light outputted from the light source, and a lens holder to and from which the projection lens is attachable and detachable. The projection lens projects the light modulated, and the lens holder includes a first lens holding mechanism and a second lens holding mechanism that hold the projection lens.

Abstract: Described examples include an optical device having a first light source configured to provide a first light having a first characteristic. The optical device also has a second light source configured to provide a second light having a second characteristic. The optical device also has a combiner configured to combine the first light and the second light to provide a combined light. The optical device also has a spatial light modulator configured to modulate the combined light to provide modulated combined light. The optical device also has a divider configured to receive the modulated combined light and to direct a first portion of the modulated combined light having the first characteristic to a first target and to direct a second portion of the modulated combined light having the second characteristic to a second target.

Abstract: A pico projector and a control method of the pico projector are provided. The pico projector is installed on a door of a vehicle and includes a light source, a DMD, a projection lens, a power supply unit, and a processing circuit. The processing circuit receives a shutdown warning signal, transmits a parking signal to the DMD to perform a parking operation on the DMD, and notifies the power supply unit of cutting off a first power provided to the DMD after a predetermined time interval from transmitting the parking signal.

Abstract: An imaging system and a projection device are provided. The imaging system includes a first reflective display, a second reflective display, and a light combining element. The first reflective display is configured to provide a first image beam. The second reflective display has the same pixel configuration as the first reflective display, and the second reflective display is configured to provide a second image beam. The light combining element is disposed on transmission paths of the first image beam and the second image beam. The light combining element has a light combining surface, and positions of the first image beam and the second image beam reflected on the light combining surface by pixels in corresponding positions in the first reflective display and the second reflective display are dislocation. The invention maintains good reliability while improving resolution of an image screen.

Abstract: A projection apparatus including an array of infrared emitters, the infrared emitters of said array being arranged in a first pattern; a plurality of liquid-crystal cells and corresponding control circuits, a given liquid-crystal cell being arranged in front of a corresponding infrared emitter of said array; and a processor configured to generate drive signals for driving the control circuits in a random or pseudorandom manner; and control the plurality of liquid-crystal cells individually, via the corresponding control circuits, to project a second pattern of light spots onto objects present in a real-world environment, wherein, when driven by a given drive signal, a given control circuit electrically controls a corresponding liquid-crystal cell to any of: block light emanating from a corresponding infrared emitter, transmit the light in an unbended manner, bend the light.

Abstract: A lens structure includes a lens barrel, a frame, a first lens module, a second lens module, and an elastic sleeve. The frame leans against a rear end of the lens barrel. A first gap is provided between the lens barrel and the frame. The first lens module includes a first side exposed outside the lens barrel and a second side arranged in a front end of the lens barrel. A second gap is provided between the lens barrel and the first lens module. The second lens module includes a third side arranged in the rear end of the lens barrel and a fourth side exposed outside the frame. The elastic sleeve sleeved on the lens barrel includes a first end extending to the frame to completely cover the first gap and a second end extending to a portion of the first lens module to completely cover the second gap.

Abstract: A projection-type image display apparatus is provided with a light source, a disk, a color separator, and first and second modulation elements. The disk generates color lights in a time-division manner based on emission light from the light source unit, and the color separator separates first, second, and third primary colors from the color lights generated by the disk. The first light modulation element modulates the separated first and second primary colors according to an input first image signal to generate a first image light, and the second light modulation element that modulates the separated third primary color according to an input second image signal to generate a second image light. A control circuit controls the first and second light modulation elements such that the second light modulation element becomes an ON-state during a spoke period of the disk upon displaying the third primary color as a single color.

Abstract: A motor vehicle includes a lighting module that generates a symbol on the ground in the surroundings of the motor vehicle, a surrounding sensor system that detects sensor information in a region in the surroundings of the motor vehicle, and a controller designed to control the lighting module depending on the sensor information such that the symbol is generated automatically by the lighting module in a ground region between the motor vehicle and another road user as soon as the distance between the motor vehicle and the other road user falls below a specified threshold according to the sensor information.

Abstract: An optical device of the present disclosure includes an optical element and an aberration correction element configured to correct aberration caused by the optical element. The aberration correction element includes a plurality of columnar structures made of a dielectric material. The plurality of columnar structures have a refractive index and a pitch such that a waveguide effect with respect to incident light is produced, and a diameter of a first columnar structure and a diameter of a second columnar structure among the plurality of columnar structures differ from each other.

Abstract: A projection system is formed of a first optical system and a second optical system sequentially arranged from the demagnifying side and forms an intermediate image in a position between a demagnifying-side image formation plane and a magnifying-side image formation plane of the projection system. The second optical system is a lens. The lens has a first transmissive surface, a reflective surface, and a second transmissive surface sequentially arranged from the demagnifying side toward the magnifying side. The reflective surface has a concave shape, and the second transmissive surface has a convex shape protruding toward the magnifying side. An imaginary line specified in the lens inclines with respect to an imaginary vertical line perpendicular to the imaginary axis in a plane YZ, and the intermediate image is located in the lens between the first transmissive surface and the reflective surface.

Abstract: A projector includes a fan, a fan frame, a first casing, a second casing and a projection lens. The fan is sleeved in the fan frame, wherein the fan frame comprises a first fixing portion having a first through hole, and two slits located at two opposite sides of the first fixing portion, an extension direction of the two slits is parallel to an extension direction of the first through hole, and a length of each of the two slits is greater than a depth of the first through hole. The first casing is fixed to the fan frame, wherein a first screw passes through the first through hole and is fixed to the first casing. The second casing is fixed to the first casing. The projection lens is fixed to the second casing.

Abstract: A phase modulation data generating unit according to the present disclosure includes: a first calculating section; and a storage section. The first calculating section calculates basic phase modulation pattern data on the basis of a partial illumination image pattern that makes it possible to generate an intended illumination image pattern having a desired luminance distribution. The basic phase modulation pattern data makes it possible for a light phase modulation device to reconstruct the partial illumination image pattern. The storage section stores the basic phase modulation pattern data calculated by the first calculating section.

Abstract: A vehicle collision avoidance system has a side-view camera positioned on a side portion of a vehicle and configured to present a driver with a rear side view exterior to the vehicle. A display is coupled to the side-view camera and disposed in view of the driver to output a video stream from the side-view camera. A turn signal sensor is configured to detect activation of a turn signal. A controller is configured to receive signals from the turn signal sensor and to adjust a field of view of the side-view camera based on activation of the turn signal.