Abstract: An optical device includes a light-conducting member, having a first panel surface disposed facing an image forming unit, that conducts image light incident on a light entry plane formed at an end of the first panel surface to a light exit plane formed in front of the viewer's eye; a first diffractive optics element, provided on the light entry plane, that diffracts the image light incident on the light entry plane in a predetermined direction and transmits that light into the light-conducting member; a second diffractive optics element, provided on the light exit plane, that diffracts the image light exiting from the light exit plane in a predetermined direction and transmits that light to the front of the viewer's eye; and one or more reflective planes disposed within a waveguide for the image light diffracted by the first diffractive optics element.

Abstract: An image display apparatus includes a plurality of light source sections, a light combining section that combines light fluxes, an optical scan section that swings around a first axis and a second axis to deflect a combined light from the light combining section for scanning, and a controller that controls an amplitude of the optical scan section around the first axis to be greater than that of the optical scan section around the second axis, wherein an optical axis of each of the light fluxes from the plurality of light source sections to the optical scan section and the first axis are present in a first plane, the optical scan section has a light reflection surface configured to be perpendicular to the first plane, and the light reflection surface is irradiated with the combined light and traveling in a direction inclined to a normal to the light reflection surface.

Abstract: An image display apparatus including a plurality of light source sections, a light combining section that combines light fluxes, an optical element that inclines an optical axis, and an optical scan section that deflects light for scanning, wherein an optical axis of the light flux from each of the plurality of light source sections to the optical scan section is present in a first plane, the optical scan section has a light reflection surface that is perpendicular to the first plane and swings around a first axis present in the first plane and a second axis parallel to the direction of a normal to the first plane, and an angle of radiation of the light flux in the direction of the normal to the first plane is greater than that of the light flux in an in-plane direction in the first plane.

Abstract: A projector that includes a laser beam source that outputs a laser beam that is modulated based on an image signal and a screen on which the light beam is projected. The projector also includes a scanning unit that scans the laser beam within a predetermined surface and a scan monitoring unit that monitors scanning of the scanning unit and outputs a result of the monitoring. The projector further includes a beam light supply stopping unit that controls the laser beam source so as to stop output of the laser beam based on the result of monitoring output by the scan monitoring unit.

Abstract: An image display apparatus includes: a plurality of laser beam sources which emit different color light beams; a plurality of light modulators which modulate the light beams emitted from the laser beam sources; and a projection element which projects the light beams modulated by the light modulators, wherein the light modulators are disposed such that the light beams are incident from different directions, and the laser beam sources are concentrated in a single position.

Abstract: A light source that emits light includes light source units, each emitting a plurality of light beams parallel to one another, the plurality of light beams including first and second light beams, and a beam distance adjustment element that is an optical element made of a light-transmissive material. The beam distance adjustment element is configured to adjust the distance between the first and second light beams. The beam distance adjustment element includes a first incidence plane on which the first light beam is incident, a first exit plane that is parallel to the first incidence plane and from which the first light beam exits, a second incidence plane on which the second light beam is incident, and a second exit plane that is parallel to the second incidence plane and from which the second light beam exits. The first and second light beams intersect in the beam distance adjustment element.

Abstract: A light source device includes a plurality of light emitting elements for emitting light beams, a resonant mirror functioning as a resonator for selectively reflecting the light beams emitted respectively from the light emitting elements, towards the light emitting elements, a wavelength selection element disposed on light paths between the light emitting elements and the resonant mirror, having a plurality of light selection areas for executing selection respectively on the light beams emitted respectively from the light emitting elements, transmitting light beams each having a part of a wavelength band of corresponding one of the light beams emitted respectively from the light emitting elements, and having a narrower width of a wavelength band of the light beam to be transmitted than a width of wavelength band of the light beam to be reflected by the resonant mirror, and a state changing section that changes a state of the plurality of light selection areas, and the state changing section changes the state

Abstract: A projection optical system including a projection lens, a first mirror that reflects a light from the projection lens, and a second mirror that widens an angle of a light from the first mirror by reflecting the light projects a light modulated according to an image signal from an optical engine unit. A third mirror reflects a light from the projection optical system. A screen transmits a light from the third mirror. An optical axis of the projection lens substantially matches an optical axis of the second mirror, and the light from the optical engine unit is shifted to a specific side from the optical axis of the projection lens.

Abstract: A light source device includes a plurality of light emission sections disposed in parallel with an interval, wherein the interval for the light emission sections near each end portion in an array of the light emission sections is narrower than the interval near a center portion in the array.

Abstract: A screen includes a plurality of reflecting portions disposed on a flat surface with a clearance left between one another. The reflecting portions reflect diagonal incident light coming in a predetermined direction other than the normal line direction of the flat surface, and block the diagonal incident light by reflecting the incident light such that the incident light cannot reach each area between the adjoining reflecting portions on the flat surface.

Abstract: A projection optical system including a projection lens, a first mirror that reflects a light from the projection lens, and a second mirror that widens an angle of a light from the first mirror by reflecting the light projects a light modulated according to an image signal from an optical engine unit. A third mirror reflects a light from the projection optical system. A screen transmits a light from the third mirror. An optical axis of the projection lens substantially matches an optical axis of the second mirror, and the light from the optical engine unit is shifted to a specific side from the optical axis of the projection lens.

Abstract: An image display apparatus 100 that displays an image using a light modulated according to an image signal includes a projection optical system 90 that includes a projection lens 20, a first mirror 30 that reflects a light from the projection lens 20, and a second mirror 40 that widens an angle of a light from the first mirror 30 by reflecting the light, and projects the light modulated according to the image signal from an optical engine unit 10; a third mirror 50 that reflects a light from the projection optical system 90; and a screen 50 that transmits a light from the third mirror 50. The projection lens 20 and the second mirror 40 are arranged in such a manner that an optical axis of the projection lens 20 substantially matches an optical axis of the second mirror 40, and shift the light from the optical engine unit 10 to a specific side from the optical axis of the projection lens 20.

Abstract: A laser source device includes: a plurality of lasers; wavelength converting elements that convert wavelengths of a plurality of light beams emitted from the plurality of lasers; a temperature sensor that detects the temperatures of the wavelength converting elements; and a temperature controlling unit that controls the temperatures of the wavelength converting elements on the basis of an output of the temperature sensor.

Abstract: A light source device includes: a laser light source emitting a laser beam of a prescribed wavelength; a nonlinear optical element, disposed facing a light emergence surface of the laser light sources which converts an emission wavelength of the laser beam emitted from the laser light source and causes the laser beam to emerge; a volume phase grating, disposed facing an emergence surface of the laser beam of the converted wavelength converted by the nonlinear optical element, which has formed in an interior thereof a Bragg grating structure which selectively reflects a laser beam of an emission wavelength; and a first dielectric multilayer, provided on a light emergence surface of the volume phase gratings which transmits the laser beam of the converted wavelength and reflects the laser beam of the emission wavelength.

Abstract: A projection apparatus includes a first optical system, an aperture disposed on the light exiting-side of the first optical system, a second optical system disposed on the light exiting-side of the aperture, and a reflector disposed on the optical path between the first optical system and the second optical system, the reflector having a reflection surface that reflects the light having exited from the first optical system toward the second optical system. The optical axis of the second optical system is disposed along the optical axis of the first optical system. The reflection surface of the reflector is disposed along the optical axis of the first optical system. At least part of the first and second optical systems that is on the side opposite the reflection surface of the reflector is cut off.

Abstract: A light source device includes at least two light emitting parts which emit light; and a polarization separating part which transmits polarized light in a first vibrating direction of the lights from the light emitting part, and reflects polarized light in a second vibrating direction nearly orthogonal to the first vibrating direction, thereby to separate the lights from the light emitting part into the polarized light in the first vibrating direction and the polarized light in the second vibrating direction. Herein, the light emitting part includes a reflection part which reflects light that travels toward the light emitting part from the polarization separating part, in the direction of the polarization separating part.

Abstract: A screen includes a plurality of reflecting portions disposed on a flat surface with a clearance left between one another. The reflecting portions reflect diagonal incident light coming in a predetermined direction other than the normal line direction of the flat surface, and block the diagonal incident light by reflecting the incident light such that the incident light cannot reach each area between the adjoining reflecting portions on the flat surface.

Abstract: A screen includes a plurality of convexes disposed on a flat surface with a clearance left between one another. The convexes reflect diagonal incident light coming in a predetermined direction other than the normal line direction of the flat surface, and block the diagonal incident light by reflecting the incident light such that the incident light cannot reach each area between the adjoining convexes on the flat surface.

Abstract: Exemplary embodiments of the invention provide a display panel, etc. which can be controlled by optical addressing, and which are simple in construction and can reduce costs. According to exemplary embodiments, a display device includes a first transparent electrode layer and a second transparent electrode layer which are optically transparent, a variable conductivity layer which is disposed on the first transparent electrode layer and whose electrical conductivity is changed in accordance with the light quantity of control light L transmitted through the first transparent electrode layer, and a functional layer having at least a light emission layer, which is stacked on the variable conductivity layer and which is interposed between the variable conductivity layer and the second transparent electrode layer.

Abstract: A light source device includes a plurality of light emitting elements for emitting light beams, a resonant mirror functioning as a resonator for selectively reflecting the light beams emitted respectively from the light emitting elements, towards the light emitting elements, a wavelength selection element disposed on light paths between the light emitting elements and the resonant mirror, having a plurality of light selection areas for executing selection respectively on the light beams emitted respectively from the light emitting elements, transmitting light beams each having a part of a wavelength band of corresponding one of the light beams emitted respectively from the light emitting elements, and having a narrower width of a wavelength band of the light beam to be transmitted than a width of wavelength band of the light beam to be reflected by the resonant mirror, and a state changing section that changes a state of the plurality of light selection areas, and the state changing section changes the state