Sony Corporation

Atsuo Kikuchi

Hiroyuki Kinoshita

Kenichi Nishio

Atsuo Minato

Gentaro Irisawa

Kazuyuki Takahashi

Motoyuki Ohtake

Masayuki Murata

Takuya Kato

Tsukasa Hashino

Fumikazu Kanetaka

Hyongmyong Kang

A zoom lens includes a first lens group having a positive refracting power, a second lens group having a negative refracting power, a third lens group having a positive refracting power, and a fourth lens group having a positive refracting power. When the zoom lens is zoomed from a wide-angle end state to a telephoto end state, the first lens group is moved toward the object side so that a distance between the first and second lens groups increases and the third lens group is moved toward the object side so that a distance between the second and third lens groups decreases. The second lens group includes three lenses: negative, positive, and negative lenses in order from the object side to the image side. The third lens group includes three lenses: positive, negative, and positive lenses in order from the object side to the image side.

Zoom lens and imaging apparatus

An imaging apparatus includes: a shift lens driven to be shifted; a uniform aberration correction data storing unit storing uniform aberration correction data for correcting uniform aberration; a shift amount calculating unit calculating an amount of aberration correction shift of the shift lens for correcting uniform aberration using the uniform aberration correction data; a shift lens driving unit driving the shift lens to be shifted according to an amount of driving shift based on the amount of aberration correction shift; a concentric aberration correction amount calculating unit calculating an amount of concentric aberration correction for correcting concentric aberration with respect to a process target pixel of an input image signal; and a pixel value correcting unit correcting a pixel value of the process target pixel on the basis of the calculated amount of concentric aberration correction.

Imaging apparatus, aberration correcting method, and program

An aberration correction apparatus includes: a correction data holding section that holds correction data on a correction level used to correct chromatic aberration of magnification; a center position discrepancy data holding section that holds center position discrepancy data on the discrepancy between the center of an image area and the position of an aberration center of the chromatic aberration of magnification; an aberration center calculating section that selects one of the center position discrepancy data that corresponds to a combination of the discrepancy variation conditions in an imaging apparatus and calculates the position of the aberration center based on the selected center position discrepancy data; an image height calculating section; a magnification chromatic aberration correction level calculating section; and a pixel value correcting section.

Aberration correction apparatus, aberration correction method, and program

Disclosed herein is a variable focal length lens system including a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The first to the fifth lens groups are arranged in order from an object side. The variable focal length lens system satisfies following conditional expressions (1) to (3):0.95&#x3c;13&#x3c;1.4&#x2003;&#x2003;(1)0.08&#x3c;2/4&#x3c;0.3&#x2003;&#x2003;(2)0.06&#x3c;&#x394;3/&#x3c;0.22&#x2003;&#x2003;(3)where f13T is combined focal length of the first to third lens groups in the telephoto end state, ft is focal length of the lens system as a whole in the telephoto end state, f2 is focal length of the second lens group, f4 is focal length of the fourth lens group, and &#x394;3 is an amount of travel of the third lens group from the wide-angle end state to the telephoto end state.

Variable focal length lens system and image pickup device

An optical pickup is provided which is capable of minimizing an astigmatism thereof with a simple configuration. The optical pickup includes a collimate lens for transferring optical beams outputted from a laser diode to parallel light, and an objective lens for collecting the optical beams transferred to parallel light with the collimate lens and applying the optical beams to an optical disk, wherein mounting angles of the collimate lens and the objective lens are adjusted so that astigmatisms of the collimate lens and the objective lens may be offset by each other. Thus the astigmatism of the optical pickup can be minimized with a simple configuration without need for separately providing an element for correcting aberration.

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Kanagawa, Japan

Atsuo Kikuchi