Abstract:
PROBLEM TO BE SOLVED: To provide a virtual image display device capable of setting an aspect ratio to a desired state with respect to image light that enters eyes of an observer as a virtual image while satisfying limitations on design.SOLUTION: By extending conversion in an aspect ratio converting optical system, an aspect ratio of a virtual image formed can be converted to an aspect ratio of 16:9 wider than an original aspect ratio of 4:3 of an image region of an image display device. Accordingly, for example, even when a lateral width of an image forming device including the image display device with respect an entire virtual image display device is limited by design and an aspect ratio of the image region cannot be set to a relatively wider aspect ratio, for example 16:9, required for video and becomes an aspect ratio close to that of a square, for example aspect ratio of 4:3, an aspect ratio of image light recognized by eyes of an observer as the virtual image can be adjusted to a desired state, for example the aspect ratio of 16:9, by aspect ratio conversion by means of a cylindrical lens.
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 for forming an erect unmagnified image of a manuscript (object) OB through arranging lens arrays 51a, 51b having lenses 512 in layers; a shading component 52 having an open hole 52a for passing light reflected at the manuscript OB, and arranged at an object (manuscript) side of the imaging optical system 51 such that the light passing through the open hole 52a enters a lens 512 positioned in the lens array 51a of the imaging optical system 51 arranged at a position closest to the manuscript OB; and a transparent flat plate 55 made of a translucent material, arranged at an object side of the shading component 52 and covering the open hole 52a.
Abstract:
PROBLEM TO BE SOLVED: To provide an image relay optical system that easily displays large and bright virtual images with relatively reduced aberration, and a virtual image display device incorporating the same.SOLUTION: An image relay optical system 20 is provided with an optical coupling member 21 in front of a light guide member 22 on which image light is incident. The optical coupling member 21 is provided with a first optical incident surface 21a, a coupling member reflection surface 21b, and a first light emitting surface 21c. Since the coupling member reflection surface 21b and the first light emitting surface 21c each have respective curved surfaces, a large and bright virtual image with reduced aberration can be displayed.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate for a virtual image display that can be prepared in a relatively simple manner and that has high optical performance, and a virtual image display including the light guide plate, and to provide a method for manufacturing the light guide plate.SOLUTION: A first block section B1 and a second block section B2 are individually prepared and are bonded together. Hence, sink generation is prevented in the preparation of the block sections B1 and B2, thereby making it possible to prepare a thick section TT having high optical performance as a light guide plate 20 in a relatively simple manner. Further, at this time, the thick section TT serves as a light incident section D1 so that the light guide plate 20 is capable of drawing more image light in the light incident section D1. Moreover, a virtual image display 100 including the light guide plate 20 can be manufactured with relatively high precision in a relatively simple manner.
Abstract:
PROBLEM TO BE SOLVED: To provide a technique capable of enhancing imaging performance in an imaging optical element changing a direction of an optical axis by using two reflection planes.SOLUTION: A first lens to which light from an object is made incident, a second lens emitting light and a coupling section coupling the first lens with the second lens are integrally formed with a transparent medium. The coupling section has curved shapes at a first bent portion and a second bent portion, respectively, from the first lens to the second lens. A first reflection film that reflects light made incident from the first lens toward the second bent portion is formed on an outer peripheral surface of the first bent portion while a second reflection film that reflects light reflected by the first reflection film toward the second lens is formed on an outer peripheral surface of the second bent portion. Light made incident to the first lens is emitted from the second lens and is subsequently imaged with an erect equal-magnification ratio while passing through inside the transparent medium from the first lens to the second lens via the first reflection film and the second reflection film.
Abstract:
PROBLEM TO BE SOLVED: To provide a technology for enabling improvement in light use efficiency in an imaging optical element that changes the orientation of an optical axis by using two reflecting surfaces.SOLUTION: A first lens LS1 on which light from an object is made incident, a second lens LS2 from which light is emitted, and a guide part 51 connecting the first and second lenses LS1 and LS2 and configured such that light made incident on the first lens LS1 is reflected by the first reflecting surface 511, and then reflected by the second reflecting surface 512, thereby guided to the second lens LS2 are integrally formed from a transparent medium. Light made incident on the first lens LS1 travels in the transparent medium as far as the second lens LS2 via the first and second reflecting surfaces 511 and 512 and is imaged at the magnification of the upright same size after emitted from the second lens LS2. The first and second reflecting surfaces 511 and 512 are total reflection surfaces that totally reflect light.
Abstract:
PROBLEM TO BE SOLVED: To image-form a bright erected image of an object with a simple structure and without the need of performing a highly accurate position adjustment thereof.SOLUTION: An incident section 51 having an incident side lens surface to which a light beam emitted from an object, manuscript OB, is made incident, an emission section 53 having an emission side lens surface emitting the light beam and a connection section 52 having a total reflection surface totally reflecting the light beam made incident to the incident side lens surface so as to guide the light beam made incident to the emission side lens surface while connecting the incident section 51 and the emission section 53 to each other are integrally molded with a transparent medium. An 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 emission side lens surface while forming the intermediate image of the object at any of the incident section 51, the connection section 52 and the emission section 53.
Abstract:
PROBLEM TO BE SOLVED: To provide a manufacturing method of a light guide plate in which a plurality of reflecting faces in the light guide plate can be fabricated relatively simply and easily in a superior reflecting state in the light guide plate, and to provide the light guide plate.SOLUTION: In a groove forming process, a saw teeth shape part DT corresponding to a first and a second reflecting faces 23a, 23b which are a plurality of reflecting faces to extract light guided into the interior of the light guide plate 20 to the exterior is formed by a first and a second flat faces 123a, 123b which form a prescribed angle α in the resin base material 50. Furthermore, in the process of forming the reflecting faces, reflecting films MB which become the reflecting faces by oblique vapor deposition method can be formed by a desired thickness on the saw teeth shape part DT. Moreover, in a reflecting face embedding process, the reflecting films MB can be protected by embedding the reflecting films MB in the interior of the light guide plate 20 by using the resin material 51 having the same refractive index as the resin base material 50.
Abstract:
PROBLEM TO BE SOLVED: To provide a light guide plate for a virtual image display device which can emit virtual image light which is image light in the state where luminance unevenness and video unevenness are suppressed and light use efficiency is comparatively high and to provide a virtual image display device.SOLUTION: Any image light incident on an image take-out part 23 is reflected by a first reflecting surface 23a and a second reflecting surface 23b in two stages. In this case, among the image light, not only can light flux which has a small total reflection angle be made directly incident on the side near a light incidence part among respective reflecting units, but also light flux which has a large total reflection angle at a light guide part can be made directly incident on the side far from the light incidence part among the respective reflecting units to make it possible to be taken out to the outside. Thus, since it is not necessary for the image light to pass through the image take-out part 23 for multiple times, the image light is emitted as virtual image light effective for an observer in the state where luminance unevenness and video unevenness are suppressed and light use efficiency is high.
Abstract:
PROBLEM TO BE SOLVED: To provide a projector including a light emitter that causes light beams emitted from a plurality of gain regions to proceed in the same direction, thereby facilitating the light axis adjustment in the projector. SOLUTION: In the projector 10000, among exposed surfaces of an active layer 108, a first surface 107 and a second surface 109 are positioned opposed to each other. A first gain region 180 is inclined clockwise to a normal P of the first surface 107 from the first surface 107 of the active layer 108 to the second surface 109 thereof linearly, in plan view from a stacked direction of the active layer 108. A second gain region 182 is inclined counterclockwise to the normal P of the first surface 107 from the first surface 107 of the active layer 108 to the second surface 109 thereof linearly, in plan view from the stacked direction of the active layer 108. An optical member 158 refracts light each emitted from an edge 172 on a second surface 109 of the first gain region 180 and an edge 176 on a second surface 109 of the second gain region 182 and emits these light as light that proceeds in the same direction. COPYRIGHT: (C)2011,JPO&INPIT