Patent application number | Description | Published |
20100265362 | Zoom optical system and image pickup apparatus provided with the same - A zoom optical system comprising, in order from the object side, a first lens unit with negative power, a second lens unit with positive power, a third lens unit with positive power, and a fourth lens unit, wherein spacing between the first lens unit and the fourth lens unit is fixed to an image surface, and the second lens unit and the third lens unit are moved on an optical axis so as to change spacings between the respective lens units when the magnification of the zoom optical system is changed. The third lens unit comprises lens elements more than three, including an aperture stop, at least a lens element with positive power and at least a lens element with negative power, and the most image-side lens element of the third lens unit is a meniscus lens element with a concave surface facing the image side. | 10-21-2010 |
20120176529 | VARIABLE POWER OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME - A variable power optical system includes, in order from the object side, a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power. The variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element. The second lens element has a convex shape on the object side. The final lens group includes a positive lens. The variable power optical system satisfies the following conditions: | 07-12-2012 |
20140078375 | VARIABLE POWER OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME - Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression: | 03-20-2014 |
Patent application number | Description | Published |
20090195888 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the positive lens group is disposed at an object side of the aperture stop,
| 08-06-2009 |
20090279183 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the positive lens group is disposed at an image-plane side of the aperture stop,
| 11-12-2009 |
20090279184 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - In an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an image side of the of the aperture stop,
| 11-12-2009 |
20090279185 | Image Forming Optical System and Electronic Image Pickup Apparatus Using Image Forming Optical System - An image forming optical system according to the present invention is characterized in that, in an image forming optical system having a positive lens group, a negative lens group, and an aperture stop, the negative lens group is disposed at an object side of the aperture stop,
| 11-12-2009 |
20100149404 | Image forming optical system and electronic image pickup apparatus equipped with same - An image forming optical system characterized by comprising a positive first lens group, a negative second lens group, and third and subsequent lens groups having a positive composite refracting power, wherein the first lens group is composed of a cemented lens made up of one positive lens and one negative lens arranged in order from the object side, and the image forming optical system satisfies the following conditional expressions (1-1) and (2-1): | 06-17-2010 |
20100208321 | Image forming optical system and electronic image pickup apparatus using the same - An image forming optical system of the present invention includes at least one cemented lens which includes a first lens element (e | 08-19-2010 |
20110228147 | Image pickup apparatus and camera - At least some of the pixels on which color filters that give the largest weight to a brightness signal or color filters that have the highest transmittance among the plurality of color filters are provided are pixels for focus detection that are designed in such a way that the direction of incidence of light beams incident thereon is restricted, the pixels other than the pixels for focus detection are pixels for image picking-up that are designed in such a way that the degree of restriction placed on light beams incident thereon is smaller than that placed on light beams incident on the pixels for focus detection, the pixels for focus detection output at least a signal for ranging, the pixels for image picking-up output at least a signal for an image, and there are at least three pixels for focus detection in an area defined between a circle having its center at the center of any one of the pixels for focus detection and having a radius equal to 3.1 times the pixel pitch and a circle having its center at the center of the aforementioned any one of the pixels for focus detection and having a radius equal to 5.9 times the pixel pitch. | 09-22-2011 |
20120026372 | Image pickup apparatus - An image pickup apparatus in which, a taking lens is installable or fixed, includes
| 02-02-2012 |
20120099006 | IMAGE PICKUP APPARATUS - An image pickup apparatus,includes a computing section which computes a defocus amount which has been estimated,a calculating section which calculates an accuracy of defocus detection, a setting section which sets a correction value from a result of the calculating section, a correcting section which corrects the correction value obtained from the result of the setting section, to reduce an absolute value of the defocus amount which has been estimated, a lens-drive amount calculating section which calculates a lens-drive amount based on a result from the correcting section, and a control section which, at the time of video photography, carries out focusing successively by using the defocus amount and the lens drive amount obtained from the computing section, the calculating section, the setting section, and the correcting section. | 04-26-2012 |
20130016274 | IMAGE PICKUP APPARATUS AND IMAGE PICKUP DEVICEAANM Matsuo; KeigoAACI TokyoAACO JPAAGP Matsuo; Keigo Tokyo JPAANM Goto; HisashiAACI TokyoAACO JPAAGP Goto; Hisashi Tokyo JPAANM Ichikawa; YoshikazuAACI TokyoAACO JPAAGP Ichikawa; Yoshikazu Tokyo JPAANM Okubo; RyuhiAACI Asaka-shiAACO JPAAGP Okubo; Ryuhi Asaka-shi JPAANM Takase; HiroshiAACI TokyoAACO JPAAGP Takase; Hiroshi Tokyo JPAANM Takahashi; ToshioAACI TokyoAACO JPAAGP Takahashi; Toshio Tokyo JPAANM Murakami; DaichiAACI TokyoAACO JPAAGP Murakami; Daichi Tokyo JP - An image pickup apparatus includes: an image pickup device that includes a pixel used for focus detection, a plurality of the pixels being arranged in a matrix; a correction memory that stores correction information used for correcting a difference in amounts of received light that depend on pixel positions of the pixels used for focus detection; a correcting section that reads the correction information to correct a pixel value of the pixel used for focus detection; and a focus detecting section that detects a focal point by using the pixel value corrected by the correcting section. Focus accuracy is increased by correcting the pixel value for an AF pixel depending on the pixel position. | 01-17-2013 |
Patent application number | Description | Published |
20110298963 | Image pickup apparatus - An image pickup apparatus includes: an optical imaging system; an image pickup device; a defocus quantity calculation circuit for calculating a defocus quantity based on a phase difference between a plurality of signals for focus detection obtained from a plurality of pixels for focus detection that respectively receive a light flux that has passed through a different pupil region of the optical imaging system; a focusing section for driving the optical imaging system so as to achieve an in-focus state in accordance with the calculated defocus quantity; and a thinning-out circuit for thinning out a plurality of signals for focus detection that are not used for calculating the defocus quantity, based on an analysis result of a signal component of an object image. | 12-08-2011 |
20110310266 | Image pickup apparatus - The image pickup apparatus of the present invention includes: an optical imaging system for forming an object image; an image pickup device including a plurality of pixels that photoelectrically converts the object image; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between a plurality of signals for focus detection obtained from a plurality of pixels for focus detection that respectively receive a light flux that passes through a different pupil region of the optical imaging system; a focusing section for driving the optical imaging system so as to achieve an in-focus state, in accordance with the defocus quantity calculated at the defocus quantity calculation section; an addition practicability determination section for determining a practicability of performing inter-frame addition on a plurality of signals for focus detection before calculating the defocus quantity, based on an analysis result of a signal component of the object image; and an inter-frame addition processing section for performing inter-frame addition based on a determination result of the addition practicability determination section. | 12-22-2011 |
20110310291 | Image pickup apparatus - An image pickup apparatus of the invention includes: an optical imaging system; an image pickup device; a defocus quantity calculation section for calculating a defocus quantity based on a phase difference between signals for focus detection obtained from pixels for focus detection; a high-frequency component quantity detection section for detecting a quantity of high-frequency component contained in a pixel signal outputted from a pixel other than the pixels for focus detection; a region determination section for determining in accordance with which of the defocus quantity and the high-frequency component quantity the optical imaging system is to be driven, according to a detection result of detecting in which of a plurality of divided blocks of the image pickup device an object of interest is present; and a focusing section for driving the optical imaging system in accordance with a determination result of the region determination section. | 12-22-2011 |
20150085374 | VARIABLE POWER OPTICAL SYSTEM AND IMAGE PICKUP APPARATUS HAVING THE SAME - Provided are a variable power optical system in which the value of the entire length with respect to the image height is reduced and the aberration is well corrected, and an image pickup device comprising the same. Specifically provided is a variable power optical system comprising, in order from the object side, at least a first lens group having negative refractive power, a variable power group having positive refractive power, and a final lens group having positive refractive power, wherein the variable power group is provided with, in order from the object side, a first lens element having positive refractive power, a second lens element, and a third lens element, the second lens element has a convex shape on the object side, and the final lens group comprises a positive lens, the variable power optical system satisfying the following conditional expression: | 03-26-2015 |