Abstract:
PROBLEM TO BE SOLVED: To provide an illuminator, an image display apparatus and a polarization conversion/diffusion member capable of more reliably reducing speckle noise.SOLUTION: An illuminator comprises: a laser light source for emitting laser light; and a polarization converter 43 having a plurality of areas for converting the laser light emitted from the laser light source into the laser light having a plurality of kinds of polarization directions to exit. The illuminator diffuses the laser light emitted from the laser light source or the laser light exiting from the polarization converter 43 and illuminates a projected surface 50.
Abstract:
PROBLEM TO BE SOLVED: To form an erect unmagnified image of an object with high quality by effectively preventing entry of dust into an open hole of a shading component included in an imaging optical element.SOLUTION: An imaging optical element comprises: an imaging optical system 51 including lens arrays 51a-51c having lenses arranged in layers, and configured to capture light reflected at a manuscript OB (object) to form an erect unmagnified image of the manuscript OB; and a first shading component 52 having a first open hole for passing light. The first lens array 51a of the imaging optical system 51 arranged at a position closest to the manuscript OB is arranged at an object side of the shading component 52 and covers the first open hole such that light radiated outward from the lenses of the first lens array 51 enters the first open hole.
Abstract:
PROBLEM TO BE SOLVED: To reduce the size of an image reading device configured to guide light from a light source to an object with a light guide member and read light from the object with an optical sensor.SOLUTION: The image reading device includes: a light source; a light guide member for guiding light emitted from the light source to irradiate an object; an image forming optical system for reflecting light directed in a first direction from the object in a second direction intersecting the first direction via a reflection surface disposed in the first direction of the object, and converging the light reflected by the reflection surface in the second direction via an emission section arranged in the second direction of the reflection surface, to form an erecting same magnification image of the object in the second direction of the emission section; and an optical sensor disposed in the second direction of the emission section of the image forming optical system to detect the erecting same magnification image formed by the image forming optical system. The light guide member is disposed on the object side of the emission section with respect to the first direction, the light source is disposed in the second direction of the light guide member, and the optical sensor and the light source are mounted on the same board disposed in the second direction of the image forming optical system and the light guide member.
Abstract:
PROBLEM TO BE SOLVED: To image-form an erected image of an object with a simple structure and without the need of performing a highly accurate position adjustment thereof.SOLUTION: An imaging optical element comprises: a lens of which an incident section 51 having a first lens surface to which a light beam emitted from an object, manuscript OB, is made incident, an emission section 53 having a second lens surface emitting the light beam and a connection section connecting the incident section 51 and the emission section 53 to each other with an angle are integrally molded with a transparent medium; and a reflection film being formed on an outer peripheral surface of the connection section so as to form a reflection surface and reflecting the light beam made incident to the first lens surface S1 from the reflection surface so as to guide the light beam made incident to the second lens surface. The imaging optical element image-forms an intermediate image of the object so as to form an erected image of the object at an emission side of the second lens surface while forming the intermediate image of the object at any of the incident section 51, the connection section and the emission section 53.
Abstract:
PROBLEM TO BE SOLVED: To provide a projector employing a luminaire that uses a semiconductor light-emitting element such as an LED as a light source in which an image having invariant hue can be displayed regardless of variation in the temperature coefficient of LEDs of respective colors.SOLUTION: In a luminaire 10 of a projector, intensity of illumination light of each color from LEDs 11r-11b of respective colors is detected sequentially by a common photoelectric conversion element 13, sampled by a common sample hold circuit 31, and fed back to the drive circuits 12r-12b of respective colors by the comparison circuits 34r-34b of respective colors. Since the sampling system is common to the illumination light of respective colors, individual difference of the sampling system can be eliminated, and an image having invariant hue can be displayed regardless of variation in the temperature coefficient of the LEDs 11r-11b of respective colors.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate for a virtual image display device capable of obtaining a wide field angle image while preventing image unevenness, etc. and increasing a distance to eyes of an observer, and a virtual image display device having the light guide plate incorporated.SOLUTION: One virtual image is formed by separating image light to two light guide parts 22p and 22s, taking out the image light guided to light guide parts 22p and 22s respectively by two image take-out parts 23p and 23s, and connecting the taken out image light. Thus, an image with a wider field angle can be formed, as a whole virtual image formed by connection, by increasing an effective breadth by increasing a breadth, that is, a width WD in a Z direction while preventing image unevenness, etc. alternatively, an eye relief S, which is a distance from a light guide plate 20 to a peak PK, the closest peak of an eye EY of an observer to the light guide plate, can be made longer.
Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display apparatus using a light guide plate and capable of not only observing the outside but also preventing the observation of an image from being obstructed by the outside light with a simple technique.SOLUTION: Lighting control plates 40, 40 arranged facing the outside of a light guide plate 20 adjust a transmission state of the outside light under control of a main control part 77 and a lighting control drive circuit 73, and this can prevent the observation of an image to be obstructed by the outside light when the outside light is relatively strong or the like. At this time, the lighting control plates 40, 40 are electrically controlled and no machine mechanism is required. Thus, an operation to adjust a transmission state of the outside light is automated and becomes relatively simple.
Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device able to extract image light in a satisfactory state by preventing image deterioration due to uneven brightness while restraining a loss in a quantity of light.SOLUTION: In an angle conversion part 23, an upper limit size is provided while a condition required to take an image into an eye EY with regard to the width L of the angle conversion part 23 in the arrangement direction of a reflection unit 23c is obtained taking a lateral angle of view, an eye size, etc., into account. Thereby an excessive loss in a quantity of image light in the angle conversion part 23 is restrained, image deterioration due to uneven brightness, etc., can be prevented, and image light can be extracted in a satisfactory state.
Abstract:
PROBLEM TO BE SOLVED: To provide an image forming apparatus and a rear projection display apparatus, capable of effectively attracting observer's interest by using a substantially transparent screen. SOLUTION: The image forming apparatus 100 includes a screen 500 having a display surface 500a and a projector 700 that plots an image by scanning the display surface 500a with light. The screen 500 can select, independently in respective portions of the display surface 500a, a light transmission state in which the light is transmitted and a light diffusion state in which the light is diffused, and is configured so that the portion where address light is radiated becomes to be the light diffusion state and the portion where the address light is not radiated becomes to be the light transmission state. The projector 700 is configured so as to scan the display surface 500a with the address light so that an area of the display surface 500a corresponding to an image displayed on the display surface becomes to be the light diffusion state. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a light-emitting device having a novel light-emitting element capable of reducing speckle noise and having high output. SOLUTION: The light-emitting device 1000 includes the light-emitting element 100, and at least one optical member 158 provided on the side of the light-emitting element, wherein the light-emitting element has a clad layer, an active layer and another clad layer, at least one part of the active layer configures a plurality of gain regions 180, 182, the gain regions are provided in a direction inclined to a perpendicular of one side face from the one side face of the active layer to the other side face when viewed on a plane, the plurality of gain regions form at least one gain region pair, the first gain region of the gain region pair is provided in one direction A, a second gain region of the other side of the gain region pair is provided in another direction B, and the optical member causes light emitted from an end face 172 of the first gain region and an end face 176 of the second gain region in the same side face side of the active layer to be refracted and emitted as light propagating in the same direction. COPYRIGHT: (C)2010,JPO&INPIT