Patent application number | Description | Published |
20080297895 | REFLECTIVE SCREEN AND DISPLAY SYSTEM - A disclosed reflective screen is configured to display an image projected from a projection device located within a short distance. The reflective screen comprises a first reflective surface configured to reflect, in a substantially same direction, projection light beams projected from a first position, and a second reflective surface configured to reflect, in the substantially same direction, projection light beams projected from a second position different from the first position. | 12-04-2008 |
20090066919 | PROJECTION OPTICAL SYSTEM AND IMAGE DISPLAYING APPARATUS - Disclosed is a projection optical system including a projection surface configured such that an image conjugate to an object is projected, plural optical elements having a refractive power, and a deflecting element having no refractive power configured to deflect an optical path of a light beam and to pass the light beam having a deflected optical path between the plural optical elements, wherein a normal line of the projection surface at a center of the projection surface does not pass through the plural optical elements or between the plural optical elements. | 03-12-2009 |
20090122422 | WIDE-ANGLE LENS AND IMAGE CAPTURING APPARATUS - A wide-angle lens is disclosed that includes a front lens group and a rear lens group that are arranged in order from an object side to an image side with an aperture being arranged between the front lens group and the rear lens group. The front lens group includes at least two lenses arranged toward the object side that have positive powers, and at least one lens arranged toward the image side that has a negative positive power. One of the lenses of the front lens group arranged second in order from the object side has a lens face that is arranged into an aspheric surface. The front lens group, the aperture, and the rear lens group make up an image forming system having an angle of view greater than 180 degrees. | 05-14-2009 |
20090141370 | PROJECTION OPTICAL SYSTEM AND IMAGE DISPLAY APPARATUS - A disclosed projection optical system for projecting and forming an enlarged image of an image displayed in a planar manner as an object includes: a lens system including, from an object side, at least a lens group providing telecentricity to an object space side, a lens group controlling divergence of angles of view, a diaphragm, a lens group converging the angles of view, and a lens group converging and subsequently enlarging the angles of view; and a catoptric system disposed on an image side relative to the lens system and including a mirror having negative power. Each lens group of the lens system and the mirror having negative power share an optical axis and the optical axis is shifted relative to a center of an object surface. | 06-04-2009 |
20100020367 | IMAGE READING DEVICE AND IMAGE FORMING APPARATUS - Disclosed is an image reading device configured to read information of an object, including an imaging optical system configured to image an image of an object and an image-capturing device configured to image-capture at least a portion of the image imaged by the imaging optical system, wherein the imaging optical system includes a first optical system configured to image an intermediate image of the object and a second optical system configured to image the imaged image of the intermediate image. | 01-28-2010 |
20100053737 | VARIABLE MAGNIFICATION OPTICAL SYSTEM AND PROJECTOR - A variable magnification optical system projects an image onto a screen with a sufficient magnification without requiring a large-sized mirror. The variable magnification optical system includes a first optical system through which a light beam modulated with an image signal corresponding to the image is passed; a second optical system disposed downstream of the first optical system in a direction of travel of the light beam along an optical axis; and a reflective optical element having a magnification power that is configured to reflect the light beam from the second optical system toward the screen. A magnification of the image projected on the screen is changed by moving the reflective optical element relative to the object plane, thus changing a distance between the screen and the reflective optical element, while an incident angle of the light beam on the screen is maintained substantially constant. | 03-04-2010 |
20100157421 | PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTING APPARATUS - A projection optical system comprising a first optical system configured to form a first image conjugated with an object and a second optical system configured to project a second image conjugated with the first image toward a projection surface, in which at least one of the first optical system and second optical system comprises at least one optical element(s) movable relative to the object is provided, wherein an image distance of the projection optical system is changed and a size of the second image is changed, by moving at least one of the optical element(s) relative to the object. | 06-24-2010 |
20100195061 | PROJECTION OPTICAL APPARATUS - A projection optical apparatus capable of providing high image quality and having a reduced size. The projection optical apparatus comprises a light valve and a projection optical system including a first optical system ( | 08-05-2010 |
20100254025 | WIDE-ANGLE LENS AND IMAGE PICKUP APPARATUS - Disclosed is a wide-angle lens having a viewing angle of more than 130°. The wide angle lens has a front group, an aperture, and a rear group arranged in this order from an object side to an image side. The front group has a first lens as a negative lens, a second lens as a negative lens, and a third lens as a positive lens arranged from the object side to the image side. The rear group is a cemented lens having a positive power when two lenses are bonded to each other. The wide-angle lens constitutes an image forming system with the five lenses as a whole, the first lens and the second lens of the front group are aspherical lenses, and the third lens is a spherical lens. | 10-07-2010 |
20110169912 | WIDE-ANGLE LENS AND IMAGING APPARATUS USING THE SAME - A wide-angle lens comprising: an imaging lens system, including: a front lens group, an aperture, and a rear lens group, arranged in that order from an object side to an image side; wherein said front lens group comprises first and second lens elements, having negative power respectively, and a third lens that is a positive lens, arranged in that order from the object side to an aperture side; wherein said rear lens group comprises fourth and fifth lens elements, having positive power respectively, arranged in order from the aperture side to the image side; where an incident angle to an optical axis of the imaging lens system of a chief ray of a maximum angle of view passing through the aperture is θI, the following Expression 1 is satisfied. | 07-14-2011 |
20120019791 | PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTION DEVICE - A projection optical system includes a first optical system, a second optical system, and first and second reflection mirrors. The first and second reflection mirrors are arranged on an optical path between an image forming element and a reflection surface of the second optical system, so that a direction of an optical path of light beams from the second reflection mirror to the reflection surface contains a component of a direction opposite to a predetermined direction from the image forming element to the first optical system, and a projection image of the image forming element on a conjugate surface, a projection of the reflection surface onto the conjugate surface, and a projection of the image forming element onto the conjugate surface are arrayed in this order on the conjugate surface. | 01-26-2012 |
20120026285 | WIDE ANGLE LENS AND IMAGING DEVICE - A wide angle lens whose field angle exceeds 180 degrees includes a front group, a diaphragm, and a rear group arranged in this order from an object side toward an image side. The front group includes a first lens (negative meniscus lens) whose convex surface faces the object side, a second lens (negative lens), and a third lens (positive lens) that are arranged in this order from the object side toward the image side. The rear group includes a fourth lens (positive lens), a fifth lens (negative lens), and a sixth lens (positive lens) that are arranged in this order from a diaphragm side toward the image side. Accordingly, an imaging system including six separate lenses is formed. The third lens is made of a material having an Abbe number νdL3 satisfying νdL3<21. The fifth lens is made of a material having an Abbe number νdL5 satisfying νdL5<21. | 02-02-2012 |
20120044465 | LIGHT SOURCE UNIT, ILLUMINATION DEVICE, AND PROJECTION DISPLAY APPARATUS - A light source unit includes a cylindrical transparent substrate capable of being controlled to rotate; plural segment regions provided at a cylinder portion of a side surface of the cylindrical transparent substrate; layers of different phosphors arranged on at least two of the plural segment regions, the different phosphors being configured to emit light of prescribed wavelength bands upon receiving excitation light; and an excitation light source provided inside or outside of the transparent substrate, the excitation light source being configured to apply the excitation light to the phosphors. | 02-23-2012 |
20120056978 | WIDE ANGLE LENS AND IMAGING DEVICE - A wide angle lens whose field angle exceeds 160 degrees, includes a front group, an aperture stop, and a rear group arranged in this order from an object-side toward an image-side. The front group includes a first lens (negative meniscus) whose convex surface faces the object, a second lens (negative), a third lens (negative), and a fourth lens (positive), arranged in this order from the object-side toward the image-side. The rear group includes a fifth lens (positive), a sixth lens (negative), and a seventh lens (positive), arranged in this order from an aperture-side toward the image-side. The fifth and sixth lenses are combined, forming a cemented lens having positive refractive power. The fifth and sixth lenses are made of materials having Abbe numbers of greater than or equal to 50 and less than or equal to 30, respectively. A surface of the seventh lens facing the image is aspheric. | 03-08-2012 |
20120092628 | PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTOR - A projection optical system configured to project an image onto a projection surface includes a first optical system including at least one dioptric system and having positive power as a whole; a second optical system including a reflection region and a transmission region; and a third optical system including at least one reflecting surface having power, and having positive power as a whole, wherein light entering the projection optical system passes through the first optical system to have a path thereof bent by the reflection region of the second optical system to be incident on the third optical system, and the light incident on the third optical system has the path thereof bent by the third optical system to pass through the transmission region of the second optical system to be incident on the projection surface. | 04-19-2012 |
20120212605 | DEFECT INSPECTION APPARATUS AND DEFECT INSPECTION METHOD - A defect inspection apparatus includes an imaging apparatus configured to include a lens array configure to include plural lenses arranged in a form of an array, and an imaging device configured to image a compound-eye image that is a collection of ommatidium images of an object approximately formed by the respective plural lenses of the lens array; and a processing apparatus configured to process the compound-eye image obtained from imaging the object by the imaging apparatus, and determine whether there is a defect of the object. | 08-23-2012 |
20120236266 | IMAGE PROJECTION APPARATUS - An image projection apparatus includes: an optical image generating unit to generate an optical image based on image data; a projection surface; a projection optical system including a plurality of optical elements and configured to form an projected image, onto a projection surface, coupled with the optical image generated by the optical image generating unit; a projected image shifting unit to shift the projected image by changing a posture of at least one of the plurality of optical elements included in the projection optical system; a tilt sensor to detect a posture of the optical element of which posture is changed by the projected image shifting unit; and a trapezoidal distortion correction unit to correct the optical image generated by the optical image generating unit so as to prevent the trapezoidal distortion of the projected image from occurring based on the detection result of the tilt sensor. | 09-20-2012 |
20130070333 | PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTING APPARATUS - Disclosed is a projection optical system including a first optical system configured to form a first image conjugate to an object and have an optical axis and a second optical system configured to project a second image conjugate to the first image onto a surface to be projected on, wherein the first image satisfies a condition of: | 03-21-2013 |
20130235356 | PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTION DEVICE - A disclosed projection optical system projects images on a surface to be projected on. The projection optical system includes a first optical system including at least one refraction optical system and having positive power as a whole, a folding mirror, and a second optical system including at least one reflection surface having power and having positive power as a whole. Further the folding mirror folds a light path from the first optical system to the second optical system, and in a plane including an optical axis of the first optical system and a normal line of the surface to be projected on, the following conditional expressions (1) through (3) are satisfied (1) 0.43≦d | 09-12-2013 |
20130308106 | PROJECTION OPTICAL SYSTEM - A projection optical system includes first and second optical systems. The first optical system includes a transmissive-refractive element and the second optical system includes a reflective-refractive element. An image formed by a spatial light modulator is projected by the projection optical system on a projection surface. A light beam that travels along an optical path that leads from the second optical system to the projection surface in an optical path between a center of the image formed by the spatial light modulator and the projection surface is projected at an angle with respect to a normal to the projection surface. An optical axis of the first optical system is folded to a folded position by an optical path deflecting unit in an area of the first optical system where the light beam entering the optical path deflecting unit is a converging light beam or a substantially parallel light beam. | 11-21-2013 |
20140002803 | PROJECTION OPTICAL SYSTEM AND IMAGE PROJECTING APPARATUS | 01-02-2014 |
20140340649 | LIGHTING DEVICE, PROJECTOR INCLUDING THE SAME, AND LIGHTING METHOD - A lighting device includes a first light source which emits excitation light, a wavelength convertor which generates fluorescence containing at least a first wavelength range and a second wavelength range by excitation with the excitation light, a second light source which emits light containing a third wavelength range different from the first wavelength range and the second wavelength range, an optical path-combining element which combines an optical path for the fluorescence from the wavelength convertor and an optical path for the light from the second light source, so as to guide the combined optical paths to a single emission optical path, and a light separator disposed in the emission optical path, which obtains and emits at least the first wavelength range and the second wavelength range of the fluorescence and at least the third wavelength range of the light from the second light source. | 11-20-2014 |