| Patent application number | Description | Published |
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| 20080198479 | OPTICAL APPARATUS - An optical apparatus includes an optical system including first and second movable lens units independently movable in an optical axis direction, and a controller causing the first movable lens unit to wobble in the optical axis direction based on contrast information. The optical system satisfies |tk/L|<15, where tk represents a distance from an image plane position to an exit pupil position when the exit pupil position is closest to the image plane position, L represents an effective diagonal length of an image at the image plane position. The controller causes the second movable lens unit to wobble in the optical axis direction to reduce variation of the position of the exit pupil in association with the wobbling of the first movable lens unit. The apparatus is capable of suppressing image twitching while obtaining a high focusing performance. | 08-21-2008 |
| 20090015694 | IMAGE-PICKUP APPARATUS AND LENS - An image-pickup apparatus includes an image-pickup element that photoelectrically converts an optical image formed by an image-pickup optical system having a zoom function, and a correcting part that performs correction processing for a distortion component in image data generated based on an output from the image-pickup element, the distortion component corresponding to a distortion of the image-pickup optical system. The image-pickup optical system provides a first zoom range in which a distortion amount at a certain image height is larger than a predetermined value and a second zoom range in which a distortion amount at the certain image height is smaller than the predetermined value. The correcting part performs the correction processing so that the distortion component remains in a first corrected image data in the first zoom range is larger than the distortion component remaining in a second corrected image data in the second zoom range. | 01-15-2009 |
| 20100103532 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE SAME - A zoom lens system includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a fourth lens unit having a positive refractive power. The third lens unit is stationary and the second and fourth lens units move along an optical axis during zooming. The fourth lens unit consists of a cemented lens in which a positive lens element and a negative lens element are cemented together. The zoom lens system satisfies the following conditional expression: | 04-29-2010 |
| 20100246025 | ZOOM LENS SYSTEM AND IMAGE PICKUP APPARATUS INCLUDING THE ZOOM LENS SYSTEM - A zoom lens system, in which chromatic aberration, spherical aberration, and coma may be excellently corrected in a balanced manner so as to obtain excellent optical performance over an entire zoom range, includes, in order from an object side to an image side: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; and a rear lens group including a lens unit having a positive refractive power, in which: at least one of the first lens unit and the second lens unit is moved for zooming so that an interval therebetween at a telephoto end is larger than an interval at a wide angle end; the first lens unit includes at least one negative lens; and an Abbe number (νd | 09-30-2010 |
| 20110032625 | ZOOM LENS SYSTEM AND CAMERA INCLUDING THE SAME - Provided is a zoom lens system including, in order from an object side to an image side: a first lens unit having a positive optical power; a second lens unit having a negative optical power; a third lens unit having a positive optical power; a fourth lens unit having a negative optical power; and a fifth lens unit having a positive optical power. In this zoom lens system, magnification sharing between the fourth lens unit and the fifth lens unit, and a movement amount of the second lens unit as a principal magnification lens unit are set appropriately, so as to realize a high zoom ratio and high optical performance over an entire zoom range. | 02-10-2011 |
| 20110254994 | ZOOM LENS AND IMAGE PICKUP APPARATUS HAVING THE ZOOM LENS - A zoom lens includes, in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens unit including one or more lens units. An interval between respective adjacent lens units varies during zooming such that an interval between the first lens unit and the second lens unit is larger at a telephoto end than at a wide-angle end and an interval between the second lens unit and the third lens unit is smaller at the telephoto end than at the wide-angle end. The third lens unit includes at least one negative lens. An Abbe number (νd | 10-20-2011 |
| 20110317280 | ZOOM LENS AND IMAGE PICKUP APPARATUS INCLUDING THE ZOOM LENS - A zoom lens includes, in order from the object side to the image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, and a rear lens group including one or more lens units. During zooming, the first lens unit moves along a locus convex towards the image side, and the second lens unit and the third lens unit move such that an interval between the first lens unit and the second lens unit becomes larger at a telephoto end than at a wide-angle end and an interval between the second lens unit and the third lens unit becomes smaller at the telephoto end than at the wide-angle end. The third lens unit includes a positive lens and a negative lens. Image forming magnifications β2W and β2T of the second lens unit at the wide-angle end and at the telephoto end, image forming magnifications β3W and β3T of the third lens unit at the wide-angle end and at the telephoto end, a focal length f2 of the second lens unit, and a focal length fT of the entire zoom lens at the telephoto end are appropriately set. | 12-29-2011 |
| 20120013992 | ZOOM LENS AND IMAGE PICKUP APPARATUS - A zoom lens comprising, in order from an object side to an image side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, and a third lens unit having a positive refractive power. The second and third lens units are configured to move in an optical axis direction for a magnification variation, and the first lens unit is configured to move in the optical axis direction to reduce an image-plane fluctuation associated with the magnification variation. Expressions −0.83≦f | 01-19-2012 |
| 20120105685 | IMAGE-PICKUP APPARATUS AND A ZOOM LENS FOR THE IMAGE-PICKUP APPARATUS, WITH DISTORTION CORRECTION - An image-pickup apparatus includes an image-pickup element that photoelectrically converts an optical image formed by an image-pickup optical system having a zoom function, and a correcting part that performs correction processing for a distortion component in image data generated based on an output from the image-pickup element, the distortion component corresponding to a distortion of the image-pickup optical system. The image-pickup optical system provides a first zoom range in which a distortion amount at a certain image height is larger than a predetermined value and a second zoom range in which a distortion amount at the certain image height is smaller than the predetermined value. The correcting part performs the correction processing so that the distortion component remains in a first corrected image data in the first zoom range is larger than the distortion component remaining in a second corrected image data in the second zoom range. | 05-03-2012 |
| 20120320251 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH ZOOM LENS - A zoom lens includes, in order from an object side to an image side, a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a third lens unit of a positive refractive power, a fourth lens unit of a positive refractive power, and a fifth lens unit, the second and fourth lens units being moved during zooming, a distance between the first and second lens units increasing at a telephoto end in comparison with a wide-angle end, wherein the fifth lens unit includes a first lens subunit of a negative refractive power, and a second lens subunit of a positive refractive power, the first lens subunit is moved to have a component perpendicular to an optical axis to change an image-forming position, and a condition 0.5<|(1−β | 12-20-2012 |
| 20130021676 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH THE ZOOM LENS - A zoom lens includes a first lens unit (positive), a second lens unit (negative), a third lens unit (positive), and a rear lens group having one or more lens units. During zooming from the wide-angle end to the telephoto end, the distance between the first and second lens units increases, the distance between the second and third lens units decreases, and the distance between the third lens unit and the rear lens group changes. The first lens unit consists of a positive lens and a negative lens. The following conditional expressions are satisfied: | 01-24-2013 |
| 20130050566 | ZOOM LENS AND IMAGE PICKUP APPARATUS EQUIPPED WITH THE ZOOM LENS - A zoom lens includes a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a third lens unit of a positive refractive power, and a fourth lens unit of a positive refractive power, wherein the first lens unit does not move for zooming, at least the second and fourth lens units are moved during zooming, the first lens unit includes at least one positive lens, and an Abbe number and a relative partial dispersion of a material of the positive lens, an average refractive index of materials of negative lenses included in the second lens unit, a movement amount of the second lens unit for zooming from a wide-angle end to a telephoto end, a focal length of the second lens unit, and a focal length of the entire zoom lens at the telephoto end are appropriately set. | 02-28-2013 |
| 20140118603 | ZOOM LENS AND IMAGE PICKUP APPARATUS - The zoom lens includes, in order from an object side to an image side, first, second and third lens units respectively having positive, negative and positive refractive powers, and a rear lens group. The second lens unit and a most-object side lens unit of the rear lens group are moved during zooming, and the first lens unit is not moved for zooming. The first lens unit includes one negative lens and three positive lenses. Conditions of 5.0| 05-01-2014 | |
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| 20100172348 | NETWORK RELAY APPARATUS AND PACKET DISTRIBUTION METHOD - The present invention provides a network relay apparatus capable of assuring the prevention of occurrence of order reversion of packets within flows and shifting a packet distribution destination according to load information. The network relay apparatus includes: a packet distribution processor for distributing input packets to thereby achieve load dispersion of packet processing; a statistical information collector for regularly collecting load conditions of respective packet processors; and a distribution information holder for retaining information for specifying the packet distribution destinations upon distribution of the packets. Information about the load conditions of the respective packet processors are compiled and distributed to the packet processor smallest in load. Timing provided to change the packet distribution destination is assumed to be given when a processing waiting queue does not include a packet corresponding to its flow. | 07-08-2010 |
| 20100174899 | DATA DISTRIBUTION SYSTEM, KEY MANAGEMENT DEVICE, AND KEY MANAGEMENT METHOD - Receiving terminals joining a multicast group are divided into sub groups and rekeying is performed only on the sub group which one of the receiving terminals has left. An encryption key management system having an encryption method is provided in which a multicast server is connected via an IP network, a seed node carries out encryption multicast communications among receiving terminals by using an encryption key, the receiving terminals are properly divided into the sub groups, the single encryption key is used for data distribution of the multicast server, and the number of decoding keys is equal to the number of divided sub groups. | 07-08-2010 |
| 20110122880 | GATEWAY DEVICE AND PORT NUMBER ASSIGNMENT METHOD - When streaming transfer of voice or image is performed using a real time streaming protocol (RTSP), streaming transfer of a high bit rate is enabled even in an environment of using network address port translation (NAPT) and network address translation-protocol translation (NAT-PT). When a SETUP message of RTSP is received, a port number having the same number of digits as a client port number notified by a client is assigned from a port number pool, and is registered in an NAPT table. The SETUP message is rewritten with the port number. | 05-26-2011 |
| 20110249562 | FRAME TRANSFER APPARATUS AND FRAME TRANSFER METHOD - It is intended to provide a frame transfer apparatus for transferring an LLDP frame to reduce a traffic load of the LLDP frame periodically sent for survival confirmation. The frame transfer apparatus within a network sends the LLDP frame by converting a TTL of the LLDP frame to be transferred to its maximum value of 65535. Also, the frame transfer apparatus makes the survival confirmation for a terminal, and sends as proxy the LLDP frame in which the TTL is set to 0, in place of the terminal, at a moment of expiration of the TTL, whereby the disconnection of the terminal from the network is appropriately notified to the other terminals. Thereby, the load of the LLDP frame periodically sent for survival confirmation within the network can be reduced. | 10-13-2011 |
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| 20080259767 | Objective optical element and optical pickup apparatus - An objective optical element of an optical pickup apparatus has a magnification m | 10-23-2008 |
| 20080316900 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method - An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero. | 12-25-2008 |
| 20090016195 | Optical pickup apparatus, recording/reproducing apparatus provided with the optical pickup apparatus, optical element, and information recording/reproducing method - An optical pickup apparatus for reproducing information from an optical information recording medium or for recording information onto an optical information recording medium, is provided with a first light source for emitting first light flux having a first wavelength; a second light source for emitting second light flux having a second wavelength, the first wavelength being different from the second wavelength; a converging optical system having an optical axis and a diffractive portion, and a photo detector; wherein in case that the first light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the first light flux is greater than that of any other ordered diffracted ray of the first light flux, and in case that the second light flux passes through the diffractive portion to generate at least one diffracted ray, an amount of n-th ordered diffracted ray of the second light flux is greater than that of any other ordered diffracted ray of the second light flux, where n stands for an integer other than zero. | 01-15-2009 |
