Sony Corporation

Atsuo Minato

Hiroyuki Kinoshita

Yusuke Nanjo

Kenichi Nishio

Gentaro Irisawa

Takuya Kato

Shinichi Arita

Tsukasa Hashino

Atsuo Kikuchi

Hyongmyong Kang

Akira Nakamura

Daisuke Kuroda

Yuichi Nakano

Hiroshi Omichi

Yoshitomo Onoda

Mitsuhiro Suzaki

Sota Miyatani

Kazuki Yonemoto

Syuichi Kikuchi

An imaging lens includes a first lens having a negative refracting power and having a meniscus shape; a second lens having a negative refracting power and having a meniscus shape; a third lens having a positive refracting power and having a meniscus shape; an aperture stop; a fourth lens having a positive refracting power and having a bi-convex shape; a fifth lens having a negative refracting power and having a bi-concave shape; and a sixth lens having a positive refracting power and having a bi-convex shape The imaging lens has a total angle of view of 150 degrees or more, and fulfills predetermined conditional expressions.

Imaging lens

A zoom lens includes, from the object side, a positionally-fixed first lens group having a positive refracting power, a second lens group having a negative refracting power and movable in an optical axis direction for zooming, a third lens group having a positive refracting power, and a fourth lens group movable in the optical axis direction. The first lens group includes a negative lens, a positive lens and another positive lens disposed in order from the object side and satisfies15.0&#x3c;&#x3c;31.0&#x2003;&#x2003;(1)7.0&#x3c;1/&#x3c;13.0&#x2003;&#x2003;(2)&#x2212;8.5&#x3c;1/&#x3c;&#x2212;4.0&#x2003;&#x2003;(3)where fw and ft are the focal lengths of the entire lens system in a wide angle end state and a telephoto end state, respectively, f1 is the focal length of the first lens group, and fL1 is the focal length of the negative lens of the first lens group.

Zoom lens and image pickup apparatus

An image processing method includes the steps of calculating, with respect to a processing-target pixel in an input image signal, a concentric aberration correction amount for concentric aberration that is a component of magnification chromatic aberration, the concentric aberration causing a color shift to occur in a concentric manner from the center of an image, calculating, with respect to the processing-target pixel, a uniform aberration correction amount for uniform aberration that is a component of magnification chromatic aberration, the uniform aberration causing a color shift direction and a color shift amount to uniformly occur on a whole image, and correcting a pixel value of the processing-target pixel on the basis of the calculated concentric aberration correction amount and the calculated uniform aberration correction amount.

Image processing device, image processing method, and program

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

A zoom lens is provided, which includes a first lens group Grhaving positive refractive power, a second lens group Grhaving negative refractive power, which is movable in an optical axis direction mainly for zooming (varying power), a third lens group Grhaving positive refractive power, a fourth lens group Grhaving negative refractive power, which is movable in the optical axis direction for correcting fluctuations in focal position during zooming and for focusing, and a fifth lens group Grhaving positive refractive power, which lens groups are arrayed in order from an object side, wherein the first lens group includes a concave lens, a convex lens, and a triple-cemented lens Tin which a lens Lmade of special low-dispersion glass is sandwiched in the middle, which lenses are arrayed in order from the object side. Thereby, a range from a super wide-angle area to a super telephoto area can be covered with angles of view of not less than 67 degrees at a wide-angle end and not more than 1.6 degrees at a telephoto end, various aberrations can be favorably corrected while providing a zoom ratio of about 40 times, and a zoom lens excellent in mass productivity can be attained.

Zoom lens and imaging apparatus

There is provided a zoom lens having, in an order of an object-to-image direction, a first lens group having a positive refractive power and fixed with respect to an image plane; a second lens group having a negative refractive power; a third lens group having a positive refractive power and fixed with respect to an optical axis direction; a fourth lens group having a positive refractive power; and a fifth lens group having a positive refractive power and fixed with respect to the optical axis direction. The fifth lens group is composed of a fifth-a lens group having a negative refractive power; a fifth-b lens group having a positive refractive power; and a fifth-c lens group having a positive refractive power, arranged in the order of the object-to-image direction.

A zoom lens with a reduced overall length having a color separating prism therein and a telecentric property with a first lens group (GI) having a positive refractive power and having a fixed position, a second lens group (GII) of the variable magnification type having a negative refractive power and having a position movable for magnification variation, a third lens group (GIII) having a positive refractive power and having a fixed position and a fourth lens group (GIV) having a positive refractive power and having a position variable for adjustment of a focal position upon magnification variation and upon focusing are disposed in order from an object side. At least one face of the two convex lenses in the fourth lens group is formed from an aspheric face.

A zoom lens comprising a first lens group having a positive refracting power and its position fixed, a second lens group having a negative refracting power and displacable mainly for magnification, a third lens group having a positive refracting power and its position fixed, and a fourth lens group having a positive refracting power and displacable mainly for correction of the focal position for magnification and focusing. The first lens group includes, viewed from an object, a cemented lens consisting of a first lens which is a concave meniscus lens having a convex surface facing the object side and a second lens which is a convex lens, and a third lens which is a convex meniscus lens having a convex surface facing the object side; the second lens group, viewed from an object, includes a fourth lens which is a concave meniscus lens having a convex surface facing the object side, and a cemented lens consisting of a fifth lens which is a both-side-concave lens, and a sixth lens which is a convex lens; the third lens group includes a seventh lens which is a convex lens; and the fourth lens group, viewed from an object, includes a cemented lens consisting of an eighth lens which is a convex lens having a convex surface facing the object side, a ninth lens which is a concave lens, and a tenth lens which is a convex lens, and wherein the third lens group includes at least one surface constituted by an aspherical surface and in the fourth lens group, at least the surface which is at the object side is constituted by an aspherical surface.

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Kanagawa, Japan

Atsuo Minato