Patent application number | Description | Published |
20090103189 | Zoom lens system, imaging device and camera - An object of the present invention is to provide: a zoom lens system that has a high resolution, high capability of compensating curvature of field, a high zoom ratio of, for example, 3 or greater, a reduced weight, and a reduced overall optical length at the time of non-use; and an imaging device and a camera that employ this zoom lens system so as to have a reduced thickness and excellent portability as well as high performance. The zoom lens system forms an optical image of an object with variable magnification and, in order from the object side to the image side, comprises: a first lens unit having negative optical power; a second lens unit that has positive optical power and that contains a bi-convex lens element composed of a resin material and serving as the most image side lens element; and a third lens unit having positive optical power. Then, the lens units move respectively along the optical axis in such a manner that intervals between the individual lens units should vary so that the variable magnification is achieved. Further, the condition |(R | 04-23-2009 |
20100097708 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - An object of the present invention is to provide: a zoom lens system that has a high resolution, high capability of compensating curvature of field, a high zoom ratio of, for example, 3 or greater, a reduced weight, and a reduced overall optical length at the time of non-use; and an imaging device and a camera that employ this zoom lens system so as to have a reduced thickness and excellent portability as well as high performance. The zoom lens system forms an optical image of an object with variable magnification and, in order from the object side to the image side, comprises: a first lens unit having negative optical power; a second lens unit that has positive optical power and that contains a bi-convex lens element composed of a resin material and serving as the most image side lens element; and a third lens unit having positive optical power. Then, the lens units move respectively along the optical axis in such a manner that intervals between the individual lens units should vary so that the variable magnification is achieved. Further, the condition |(R | 04-22-2010 |
20100128362 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - An object of the present invention is to provide: a zoom lens system that has a high resolution, high capability of compensating curvature of field, a high zoom ratio of, for example, 3 or greater, a reduced weight, and a reduced overall optical length at the time of non-use; and an imaging device and a camera that employ this zoom lens system so as to have a reduced thickness and excellent portability as well as high performance. The zoom lens system forms an optical image of an object with variable magnification and, in order from the object side to the image side, comprises: a first lens unit having negative optical power; a second lens unit that has positive optical power and that contains a bi-convex lens element composed of a resin material and serving as the most image side lens element; and a third lens unit having positive optical power. Then, the lens units move respectively along the optical axis in such a manner that intervals between the individual lens units should vary so that the variable magnification is achieved. Further, the condition |(R | 05-27-2010 |
20100177262 | LENS FOR ILLUMINATION, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - A lens for illumination has a light entrance surface and a light exit surface. The light exit surface has a first light exit surface and a second light exit surface. The first light exit surface projects toward a vertex on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface has a shape allowing light that has been emitted from a starting point, which is the position of a light source on the optical axis, at an angle of a specified value or more with respect to the optical axis and reached the first light exit surface to reach a surface to be irradiated by totally reflecting the emitted light at a first point thereon reached by the emitted light first and then refracting the totally reflected light at a second point thereon reached by the emitted light after being totally reflected. The second light exit surface has a shape allowing light that has been emitted from the starting point and reached the second light exit surface to reach the surface to be irradiated by refracting the emitted light at a point thereon reached by the emitted light. | 07-15-2010 |
20100188609 | ILLUMINATING LENS, AND LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS EACH USING THE SAME - An illuminating lens includes: a light entrance surface through which light emitted from a light source enters the lens; and a light exit surface through which the light that has entered the lens exits the lens. The light exit surface has: a concave portion intersecting the optical axis; and a convex portion provided around the concave portion to extend continuously from the concave portion. The light exit surface is formed in a shape such that a curvature C of micro-segments of the light exit surface in a cross section including the optical axis has a maximum value at a position outward from the midpoint of the convex portion. | 07-29-2010 |
20100201910 | ILLUMINATING LENS, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - A light exit surface of an illuminating lens has a first light exit surface and a second light exit surface. The first light exit surface is recessed toward a point on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface has a transmissive region and a total reflection region. When the position of a light source on the optical axis is defined as a starting point, the transmissive region transmits light that has been emitted from the starting point at a relatively small angle with respect to the optical axis, and the total reflection region totally reflects light that has been emitted from the starting point at a relatively large angle with respect to the optical axis. A reflective layer is formed on a bottom surface that surrounds a light entrance surface and faces oppositely to the light exit surface. The reflective layer reflects light that has been emitted from the light source, totally reflected repeatedly at the light exit surface, and then reached the bottom surface. | 08-12-2010 |
20100201911 | ILLUMINATING LENS, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - An illuminating lens has a light entrance surface and a light exit surface. The light exit surface has a first light exit surface recessed toward a point on an optical axis A and a second light exit surface extending outwardly from the periphery of the first light exit surface. The first light exit surface includes a transmissive region located in the center of the first light exit surface and a total reflection region located around the transmissive region. The transmissive region transmits light that has been emitted from a starting point Q, which is the position of a light source on the optical axis A, at a relatively small angle with respect to the optical axis A. The total reflection region totally reflects light that has been emitted from the starting point Q at a relatively large angle with respect to the optical axis A. | 08-12-2010 |
20100208166 | ILLUMINATING LENS, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - A light exit surface of an illuminating lens has a first light exit surface and a second light exit surface. The first light exit surface is recessed toward a point on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface has a transmissive region and a total reflection region. When the position of a light source on the optical axis is defined as a starting point, the transmissive region transmits light that has been emitted from the starting point at a relatively small angle with respect to the optical axis, and the total reflection region totally reflects light that has been emitted from the starting point at a relatively large angle with respect to the optical axis. A bottom surface that surrounds a light entrance surface and faces oppositely to the light exit surface is provided with a projecting portion or a recessed portion for reflecting light that has been emitted from the light source, totally reflected repeatedly at the light exit surface, and then reached the bottom surface. | 08-19-2010 |
20100208167 | ILLUMINATING LENS, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - An illuminating lens includes a main body and a ring portion. The main body has a light exit surface, and the light exit surface has a first light exit surface recessed toward a point on the optical axis and a second light exit surface extending outwardly from the periphery of the first light exit surface. The first light exit surface has a transmissive region in the center thereof, and a total reflection region on the peripheral side thereof. The ring portion has a back surface configured to guide the light that has been emitted from a light source, totally reflected repeatedly at the light exit surface, and then entered the ring portion to an end surface by total reflection. | 08-19-2010 |
20100208453 | ILLUMINATING LENS, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - An illuminating lens includes a light entrance surface, a light exit surface, and a reversing surface. The light exit surface has a first light exit surface and a second light exit surface. The first light exit surface is recessed toward a point on the optical axis, and the second light exit surface extends outwardly from the periphery of the first light exit surface. The first light exit surface includes a transmissive region in the center thereof and a total reflection region on the peripheral side thereof. The reversing surface has a shape such that the light that has been emitted from the light source, totally reflected repeatedly at the light exit surface, and then reached the reversing surface is guided to the first light exit surface by total reflection. | 08-19-2010 |
20100277672 | ILLUMINATING LENS, AND LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS EACH USING THE SAME - An illuminating lens includes: a light entrance surface through which light emitted from a light source enters the lens; and a light exit surface through which the light that has entered the lens exits the lens. The light exit surface has: a concave portion intersecting the optical axis; and a convex portion provided around the concave portion to extend continuously from the concave portion. The light exit surface is formed in a shape such that a curvature C of micro-segments of the light exit surface in a cross section including the optical axis has a maximum value at a position outward from the midpoint of the convex portion. | 11-04-2010 |
20110013116 | LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID-CRYSTAL DISPLAY APPARATUS - A lighting device includes a light emitting element that emits a first colored light; a phosphor layer disposed on the light emitting element; and a lens part that is disposed so as to cover the light emitting element and the phosphor layer, and radiates light entering inside of the lens part so as to spread the light radially. The phosphor layer allows a part of the first colored light to transmit therethrough and converts another part of the first colored light into a second colored light having a wavelength longer than that of the first colored light. The lens part has: a base portion forming a light entrance surface through which the first colored light and the second colored light enter the lens part; and a diffraction portion forming a light exit surface through which the first colored light and the second colored light exit the lens part, the diffraction portion being configured so that a refracting power with respect to the second colored light is larger than a refracting power with respect to the first colored light. | 01-20-2011 |
20110102640 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - A zoom lens system, in order from an object side to an image side, comprising a first lens unit having negative optical power, a second lens unit having positive optical power, a third lens unit having positive optical power, and a fourth lens unit having positive optical power, wherein in zooming, the intervals between the respective lens units vary, and the condition (I-1): 1.3<|f | 05-05-2011 |
20110109787 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - A zoom lens system, in order from an object side to an image side, comprising a first lens unit having negative optical power, a second lens unit having positive optical power, a third lens unit having positive optical power, and a fourth lens unit having positive optical power, wherein in zooming, the intervals between the respective lens units vary, the third lens unit comprises a plurality of lens elements, and the condition (I-1): 0.47<|f | 05-12-2011 |
20110128418 | ZOOM LENS SYSTEM, IMAGING DEVICE AND CAMERA - A zoom lens system, in order from an object side to an image side, comprising a first lens unit having negative optical power, a second lens unit having positive optical power, a third lens unit having positive optical power, and a fourth lens unit having positive optical power, wherein in zooming, the intervals between the respective lens units vary, and the condition (I-1): 2ω | 06-02-2011 |
20110279751 | ILLUMINATING LENS, LIGHTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID CRYSTAL DISPLAY APPARATUS - An illuminating lens ( | 11-17-2011 |
20120057101 | LIGHT EMITTING DEVICE, SURFACE LIGHT SOURCE, AND LIQUID CRYSTAL DISPLAY APPARATUS - A light emitting device ( | 03-08-2012 |
20120099327 | ILLUMINATING LENS, AND LIGHTING DEVICE - An illuminating lens includes: a light entrance surface through which light emitted from a light source enters the lens; and a light exit surface through which the light that has entered the lens exits the lens. The light exit surface has: a concave portion intersecting the optical axis; and a convex portion provided around the concave portion to extend continuously from the concave portion. The light exit surface is formed in a shape such that a curvature C of micro-segments of the light exit surface in a cross section including the optical axis has a maximum value at a position outward from the midpoint of the convex portion. | 04-26-2012 |
20120106168 | ILLUMINATING LENS, AND LIGHTING DEVICE - An illuminating lens includes: a light entrance surface through which light emitted from a light source enters the lens; and a light exit surface through which the light that has entered the lens exits the lens. The light exit surface has: a concave portion intersecting the optical axis; and a convex portion provided around the concave portion to extend continuously from the concave portion. The light exit surface is formed in a shape such that a curvature C of micro-segments of the light exit surface in a cross section including the optical axis has a maximum value at a position outward from the midpoint of the convex portion. | 05-03-2012 |
20120287375 | SURFACE LIGHT SOURCE DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND LENS - The present invention relates to a surface light source, including a light source section made up of plural light emitting diodes and lenses that expand light from these light emitting diodes. The lens in the light source section has a light incident surface on which light from the light emitting diode is incident with an optical axis at a center, and a light exit surface that expands and emits the incident light. The light incident surface has a continued depressed surface, while the light exit surface has a continued projected surface. The lens performs such that “sag Y” decreases from a maximum value “sag Y | 11-15-2012 |
20130114021 | SURFACE LIGHT SOURCE AND LIQUID CRYSTAL DISPLAY DEVICE - A light emitting device including a lens in which light radiated from a light source with a wide angle can effectively be oriented while a directional characteristic of the light source is expanded is provided, and a surface light source including the light emitting devices and a liquid crystal display device are provided. The surface light source is configured such that the plural light emitting devices are disposed in a central portion thereof. The light emitting device radiates the light on an optical axis A and around the optical axis A. The light emitting device includes a light source and a lens that radially expands the light from the light source. The lens includes a reflection unit at a bottom surface of the lens partially. | 05-09-2013 |
20130114022 | LIGHT EMITTING DEVICE, SURFACE LIGHT SOURCE, LIQUID CRYSTAL DISPLAY DEVICE, AND LENS - A light emitting device includes plural light emitting diodes and plural lenses each of which expands the light from the light emitting diode. The lens includes an incident surface through which the light from the light emitting diode is entered at an optical axis and around the optical axis, and an output surface from which the incident light is output while radially expanded. The incident surface includes a continuous concave surface, the output surface includes a continuous convex surface, and the lens has different refractive powers in a first direction orthogonal to the optical axis and in a second direction orthogonal to the optical axis and the first direction. | 05-09-2013 |
20130120689 | SURFACE LIGHT SOURCE AND LIQUID CRYSTAL DISPLAY DEVICE - The light emitting device radiates light at an optical axis A and around the optical axis A, and includes a light source and a lens radially expanding the light from the light source. The light source includes a light emitting element and a fluorescent material covering the light emitting element and has an emission surface orthogonal to the optical axis. The lens is configured such that a refractive power in a first direction orthogonal to the optical axis differs from a refractive power in a second direction orthogonal to the optical axis and the first direction. An incident surface of the lens may include an anamorphic curved surface in which a curved shape in the first direction differs from a curved shape in the second direction. | 05-16-2013 |
20140184887 | INNER FOCUS LENS SYSTEM, INTERCHANGEABLE LENS APPARATUS AND CAMERA SYSTEM - An inner focus lens system comprising lens units each composed of at least one lens element, wherein a most object side lens unit is provided and is fixed with respect to an image surface in focusing, and the conditions: BF/Y<1.7 and (L×F | 07-03-2014 |