Patent application number | Description | Published |
20080239171 | Image displaying apparatus and display controlling device - An image displaying apparatus includes laser light sources corresponding to a plurality of colors, while at least one of the laser light sources corresponding to one of the colors includes a plurality of wavelength conversion laser light sources corresponding to a mutually same color and has a plurality of outputs. The image displaying apparatus is operable to display a color image by causing a spatial modulation element to perform a spatial modulation process on laser beams output from the laser light sources by using a field sequential method. When the spatial modulation element performs the spatial modulation process on the laser beams output from one of the laser light sources (e.g., the green laser light source) having a plurality of outputs, a drive controlling device causes green laser emitting units serving as the wavelength conversion laser light sources to sequentially output pulses so that the laser beams output from the green laser emitting units continuously form substantially constant laser outputs that have substantially the same peak power as each other. | 10-02-2008 |
20080259605 | Illumination light source and image display apparatus - An illumination light source includes a coherent light source in which a plurality of light emitting points that emit coherent light beams are arranged in a one-dimensional array; and a light magnifying unit that magnifies the coherent light beams that are emitted from the light emitting points so that a diameter of light emitted from the coherent light source in a direction perpendicular to a direction of arrangement of the light emitting points is larger than a diameter in the direction of arrangement of the light emitting points. The illumination light source also includes an optical fiber; and a light-converging optical system in which a magnification is set such that light emitted from the light magnifying unit is coupled to the optical fiber, based on a maximum diameter of the light emitted from the light magnifying unit. | 10-23-2008 |
20090052203 | Illumination light source and image display apparatus - A coherent light source includes a plurality of light emitting points arranged in one-dimensional array. A beam shaping unit shapes a light beam so that a diameter of a light emitted from the coherent light source in a direction perpendicular to a direction of the light emitting point array is larger than a diameter in the direction of the light emitting point array, and an intensity distribution of the light emitted from each of the light emitting points is uniform. A magnification of a focusing optical system is set such that a light emitted from the beam shaping unit is coupled to an optical fiber based on a maximum diameter of the light emitted from the beam shaping unit. | 02-26-2009 |
20090122416 | Laser light beam coupling apparatus - Plural collimator lenses are arranged corresponding to plural laser light sources to collimate light beams emitted from the laser light sources into substantially parallel light beams, respectively. A condenser lens focuses the substantially parallel light beams. A coupling optical element, on which light beams focused by the condenser lens are incident, couples the light beams into a single light beam. The laser light sources are arranged such that a longitudinal direction of an emitting region of each of the laser light sources is coincident with a radial direction of the condenser lens. | 05-14-2009 |
20100074580 | LIGHT SOURCE UNIT AND IMAGE DISPLAYING APPARATUS - A light source unit includes a laser element that includes a plurality of light emitting points that are arranged along one direction on an end face thereof and irradiates laser beams having a spread in a spreading direction that is perpendicular to the one direction. A cylindrical lens held by a first body tube collimates the laser beams in block. Circular lenses held by a second body tube condense the collimated beams into an inlet of an optical fiber. The first body part and the second body part are positioned and directly coupled to each other so that an optical axis of the cylindrical lens accords with that of the circular lenses. | 03-25-2010 |
20110228230 | LASER LIGHT SOURCE DEVICE AND IMAGE DISPLAY APPARATUS - A laser light source device has a laser light source for emitting a laser beam, a laser driver for driving the laser light source, a light-collecting lens for collecting the laser beam and reflecting a part of the laser beam, an optical sensor for receiving a reflected laser beam which has been reflected by the light-collecting lens and outputting a detection signal corresponding to intensity of the reflected laser beam, and a controller for controlling driving of the laser light source by the laser driver in accordance with the detection signal, and the light-collecting lens is disposed in a eccentric-rotated state so that an optical axis of the light-collecting lens has a tilt with respect to a central ray of the laser beam being incident on the light-collecting lens. | 09-22-2011 |
20110280272 | LASER LIGHT SOURCE DEVICE - A laser light source device including: a laser light source that emits laser beams from a plurality of light emitting points; and a polarization rotating unit that is arranged on a light axis of a laser beam output from one or a plurality of light emitting points of the laser light source, wherein the polarization rotating unit rotates a polarization of the laser beam output from one or a plurality of light emitting points by about 90°. | 11-17-2011 |
20140091198 | LASER OUTPUT MEASUREMENT MECHANISM - A laser output measurement mechanism includes a light splitter that is disposed in a state rotated by a predetermined angle about an optical axis of laser light incident thereon, and that reflects a part of the laser light according to a Fresnel reflectivity that depends on a polarization direction and an incident angle of the laser light at a reflection surface thereof, and a light detector that measures an intensity of the laser light reflected by the light splitter. | 04-03-2014 |
20140285804 | LASER OUTPUT MEASURING APPARATUS - A laser output measuring apparatus in which an optical separator is disposed in a position that is rotated by a predetermined angle about an optical axis of a laser beam converged by a lens, and further rotated by a predetermined angle about the optical axis of the laser beam and a straight line perpendicular to an incident surface of the laser beam. | 09-25-2014 |
20140300873 | LASER LIGHT SOURCE APPARATUS AND IMAGE DISPLAY APPARATUS - A laser light source apparatus includes: a laser light source that emits a laser beam; a condenser lens that converges the laser beam emitted from the laser light source; and a light guide unit that propagates and outputs the laser beam converged by the condenser lens, and the laser beam converged by the condenser lens is made incident at an angle other than perpendicular to an incident end face of the light guide unit. | 10-09-2014 |