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| Number | Title | Issue Date |
| 8040618 | Imaging lens and imaging apparatus using imaging lens An imaging lens includes, in order from an object side, a positive first lens group, a stop, and a positive second lens group. The first lens group includes, in order from the object side, a first lens, which is a negative meniscus lens having a convex object-side s... | 10/18/2011 |
| 7864452 | Wide angle lens A wide angle lens especially suitable for digital single lens reflex cameras is described. The lens offers the advantages of superior performance while using fewer lens elements thus reducing size and cost to manufacture. The lens consists of two lens groups separat... | 01/04/2011 |
| 7595938 | Wide-angle imaging lens, imaging device and camera module A first lens group having a positive refractive power, an aperture stop, and a second lens group having a positive refractive power are provided in order from an object side. The first lens group includes, in order from the object side, a first lens that is a negati... | 09/29/2009 |
| 7554753 | Fish-eye lens and imaging device A fisheye lens, comprising a front group made up of a total of three groups, which are two concave lenses 1 and 2 whose concave surfaces are directed toward the image side, and a compound lens 3 whose concave surface is directed toward the image... | 06/30/2009 |
| 7301578 | Super-wide-angle optical system and image pickup device A super-wide-angle optical system for forming an optical image of an object on an image pickup surface of an image sensing device that converts the optical image into an electrical signal is provided with, in order from the object side, a first negative lens, a seco... | 11/27/2007 |
| 7259912 | Fresnel lens having reduced distortions A display device for displaying images in a rear projection display device is provided. The display device may include, amongst other structure, a screen including a lens portion and a frame portion. A tensioner may be operatively associated with the screen and may ... | 08/21/2007 |
| 7215481 | Taking lens, and imaging device incorporating the same A taking lens system includes, in order from an object side thereof, a first lens group (negative refracting), a second lens group (positive refracting), an aperture stop and a third lens group (positive refracting). Focusing from an infinite distance to a finite di... | 05/08/2007 |
| 7190532 | Imaging optical system and electronic apparatus using the same The image forming optical system comprises in order from an object side, a first lens having positive refracting power and a concave surface directed toward an object side, a second lens having double convex surfaces, an aperture stop,... | 03/13/2007 |
| 7175287 | Wide angle projection lens A projection display device is provided. The projection display device may include an image generation device configured to generate an image and a wide angle lens system having an optical axis configured to receive the image and project the image along an optical p... | 02/13/2007 |
| 7173776 | Fisheye lens system A fisheye lens system with a half angle-of-view of 90° includes a negative front lens group, a diaphragm, and a positive rear lens group. The negative front lens group includes at least three negative meniscus lens elements each of which has the convex surfa... | 02/06/2007 |
| 7161746 | Fisheye lens An object of the present invention is to provide a fisheye lens, in spite of its compactness, having an angle of view of 180 degrees and a fast f-number of 2.8 with securing sufficient back focal length and suitable for a digital camera. The fisheye lens consists of... | 01/09/2007 |
| 7150537 | Projection television device and screen A front projection display device is provided including an image-generating source configured to generate an image, a wide angle lens system adapted to receive the image, and a screen. The wide angle lens system may be configured to increase distortion of the image ... | 12/19/2006 |
| 7102820 | Flat valley fresnel lens for a display device A Fresnel lens for a display device is provided. The Fresnel lens includes a first sloped surface angled to receive input light, a second sloped surface facing the first sloped surface, and a valley floor linking the first sloped surface to the second sloped surface... | 09/05/2006 |
| 7086790 | Automatic focusing lens assembly in a camera A lens assembly in a camera includes a first meniscus lens (10) and a second meniscus lens (11) respectively having a first radius of curvature (A,A′) and a second radius of curvature (B,B′) larger than that of the first radius of curvature A,A′)... | 08/08/2006 |
| 7088509 | Laminate screen for display device A rear projection display device is provided. In an embodiment, the display device includes a laminate screen including a Fresnel lens lamina having a non-planar input surface, a substantially planar output surface and a first index of refraction. The laminate scree... | 08/08/2006 |
| 7088507 | Rear projection display The ultra-thin rear projection display device described herein includes a lens system and one or more planar mirrors that are parallel to a screen on which an image is to be displayed. The screen may be a Fresnel lens having a plurality of bumps on the output surfac... | 08/08/2006 |
| 7080910 | Method and system for a thermal architecture and user adjustable keystone in a display device A method and system for a thermal architecture and user adjustable keystone in a display device is described. The system includes a screen, a lens to project images, and one or more mirrors to reflect the images projected by the lens to the screen. A mirror assembly... | 07/25/2006 |
| 7046458 | Fisheye lens and imaging device using it A fisheye lens with a field angle of at least one hundred sixty degrees is formed of two lens groups, arranged in order from the object side, as follows: a first lens group having negative refractive power and a second lens group having positive refractive power. Th... | 05/16/2006 |
| 6989939 | Variable-power optical system, projection optical system, and image projection apparatus using the systems Disclosed is a variable-power optical system, including, sequentially from a front side to a rear side, a negative-refractive-power first lens unit that does not move for zooming, a positive-refractive-power second lens unit, a negative-refractive-power third lens u... | 01/24/2006 |
| 6956878 | Method and apparatus for reducing laser speckle using polarization averaging A method and apparatus for reducing speckle uses polarization averaging. A polarizing beam splitter divides a first polarized laser output into a second polarized laser output and a third polarized laser output. A plurality of mirrors creates an optical path differe... | 10/18/2005 |
| 6934092 | Zoom lens and photographing apparatus having the same A zoom lens of the negative lead type includes comprises, in order from an object side, a first lens unit of negative refractive power and a second lens unit of positive refractive power, variation of magnification being effected by varying a separation between the ... | 08/23/2005 |
| 6921898 | Bi-directional reflectance distribution function determination by large scale field measurement Thermal images of an object are produced outdoors so as to be significantly differentiated temporally and/or geometrically and be inclusive of natural background such as would be illuminated by sunlight. A calibration of the thermal imager (e.g., radiometer) against... | 07/26/2005 |
| 6844987 | Zoom lens system for covering superwide-angle area A zoom lens includes first to fourth lenses in order from an object side. The first lens has negative refracting power and a concave surface thereof faces the object side. The second and fourth lenses have positive refracting power. The third lens has negative refra... | 01/18/2005 |
| 6844991 | Fisheye lens An object of the present invention is to provide a fisheye lens, in spite of its compactness, having an angle of view of 180 degrees and a fast f-number of 2.8 with securing sufficient back focal length and suitable for a digital camera. The fisheye lens consists of... | 01/18/2005 |
| 6603610 | Wide-angle lens system A wide-angle lens system includes a negative first lens group, and a positive second lens group. The first lens group includes a positive lens element, and a negative lens element. The wide-angle lens system satisfies the following conditions: 0 | 08/05/2003 |
| 6549344 | Retro focus type wide-angle lens apparatus using the same A retro focus type wide-angle lens comprises a front group having a negative refracting power and a rear group having a positive refracting power. The front group comprises a first lens made of a negative meniscus lens, a second lens made of a biconvex le... | 04/15/2003 |
| 6476974 | Projection lenses for use with reflective pixelized panels Projection lenses (13) for use with pixelized panels (PP) are provided. The projection lenses have a negative first unit (U1) which has at least one aspheric surface and a positive second unit (U2) which has three subunits (US1, US2,... | 11/05/2002 |
| 5963381 | Photographic lens for electronic still camera Successively from an object side, a negative lens having a concave surface directed onto an image surface side, a positive meniscus lens having a convex surface directed onto the image surface side, a positive lens having a convex surface directed onto th... | 10/05/1999 |
| 5917663 | Wide-angle lens with an image stabilizing function A wide-angle lens with an image stabilizing function comprises, from a front, object side to a rear, image side, a lens group GF with negative refractive power; a lens group GL with positive refractive power, wherein the back focal length is longer than t... | 06/29/1999 |
| 5914823 | Camera lens systems In an image forming optical lens system comprising in order from the object end a first lens group of at least two components, a second lens group which has a positive focal length and comprises in order from the object end a first component of positive p... | 06/22/1999 |
| 5870234 | Compact wide-angle lens This invention relates to a compact wide-angle lens which consists of five members. The first member and the last member are each divergent lenses of low deviation, which consist of low refractivity crown glass. The second member and the third member are ... | 02/09/1999 |
| 5861999 | Super wide angel lens system using an aspherical lens A retrofocus type super wide angle lens system includes a front lens group of negative power and a rear lens group of positive power, arranged in this order from the object side. The front lens group consists of a negative meniscus first lens element with... | 01/19/1999 |
| 5812326 | Wide angle lens A wide angle lens is made of three groups so as to satisfy a predetermined conditional expression concerning abbe number, thereby making it telecentric and yielding no eclipse in its peripheral luminous flux. Also, an apparatus accommodating it is made co... | 09/22/1998 |
| 5774279 | Retrofoucus photographic lens A retrofocus type lens includes a front lens group including at least one negative lens and a rear lens group provided nearer than the front lens group to an image side, including at least two positive lenses and a negative lens. A positive lens of the re... | 06/30/1998 |
| 5724195 | Fast super wide-angle lens system A super wide-angle fast lens system includes a front lens group having a negative power, a diaphragm and a rear lens group having a positive power. The front lens group consists of a first sub-lens group having a negative power and a second sub-lens group... | 03/03/1998 |
| 5682269 | Objective lens device An objective lens device comprising in order from the lens closest to an object side, a negative meniscus first lens whose concave side faces the object side; a positive second lens; a positive meniscus third lens whose convex side faces an image side; a ... | 10/28/1997 |
| 5589988 | Retrofocus-type wide angle lens system having a fixed front lens group and a movable rear lens group A wide angle lens system comprises a front lens group and a rear lens group having positive refractive power. The front lens group includes in the order from the object side, a negative meniscus lens component having a convex surface facing the object sid... | 12/31/1996 |
| 5557473 | Wide angle lens A wide angle lens includes, in turn from the object side, a first lens group having a negative refracting power, and a second lens group having a positive refracting power. The first lens group includes, in turn from the object side, a first lens componen... | 09/17/1996 |
| 5513046 | Large aperture retrofocus lens A large aperture retrofocus lens system is composed of first to sixth lenses arranged in this order from the object side. The first lens has a positive refracting power, the second lens has a negative refracting power, the third lens which is a meniscus l... | 04/30/1996 |
| 5477389 | Fast ultra-wide angle lens system A fast ultra-wide angle lens system is provided which includes a front lens group having a negative power, a diaphragm, and a rear lens group having a positive power, arranged in this order from a side of an object to be photographed. The lens system sati... | 12/19/1995 |
