Tamron Company, Ltd.

Sony Corporation

Minolta Company, Ltd.

Konica Minolta Camera, Inc.

Yoshito Iwasawa

Daisuke Kuroda

Jun Takahashi

Yoshihiro Hara

Akira Kosaka

Satoshi Yokota

Kazuaki Matsui

Hisayuki Yamanaka

Sadanobu Ueda

Keisuke Okada

Nobuyuki Adachi

Masayuki Murata

Makoto Kanai

Yasuhiko Obikane

Yuichi Imamiya

Yuri Koyama

Toshiyuki Tanaka

Takashi Okada

Tetsuo Kohno

Masafumi Sueyoshi

Masaki Tamura

Dayong Li

Takeshi Hatakeyama

Motoyuki Otake

Takahiko Sakai

Kazuya Watanabe

Junichi Yamazoe

Hisashi Kitano

Wataru Kusaka

A situation grasping means configured to grasp a situation of a moving body, an optical system mounted on the moving body, and a focusing group configured to change an imaging position of the optical system are provided, and the imaging position is changed to a position calculated from a setting value for setting the imaging position according to a situation of the moving body and a situation of the moving body grasped by the situation grasping means, and the optical system satisfies a predetermined conditional expression. Furthermore, the moving body includes the imaging apparatus.

Imaging apparatus and moving body

To provide an image-capturing system capable of maintaining high analysis accuracy while reducing the amount of data related to image acquisition with a simple method. In order to achieve the object, the image-capturing system includes an image-capturing device configured to acquire image data of a subject, and an image-capturing control device configured to control image acquisition by the image-capturing device. The image-capturing control device includes a difference extraction means configured to extract difference data on the basis of any two image data items acquired by the image-capturing device, a change amount extraction means configured to extract change amount data on the basis of any two difference data items extracted by the difference extraction means, and a condition change means configured to change an image acquisition condition in the image-capturing device on the basis of the change amount data extracted by the change amount extraction means.

Image-capturing system capable of reducing an amount of data related to image acquisition

An observation imaging apparatus includes an insertion unit, an imaging lens, and an image sensor. The imaging lens is disposed in such a manner that an axial principal ray of an observation subject side surface of a lens is tilted with respect to a normal line passing through the center of gravity of a section of the insertion unit, the section passing through the center of an effective imaging range of the image sensor and having the smallest area. A point on the axial principal ray at which the distance between the normal line and the axial principal ray is smallest is located on the image side relative to the observation subject side surface of the lens and on the observation subject side relative to the image sensor. The observation imaging apparatus satisfies a predetermined conditional expression.

Observation imaging apparatus

The present invention provides a zoom lens which is the zoom lens that includes a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, and a third lens group G3 having positive refractive power in order from an object side, and changes focal length by changing an air interval between the respective lens groups, the zoom lens including a focus group F constituted from one lens in or after the third lens group G3, moving only the focus group F along an optical axis direction when focusing from an infinity object to a proximity object, and satisfying specific conditional expressions, and an imaging apparatus including the zoom lens.

Zoom lens and imaging apparatus

A zoom lens including a front group and a rear group, wherein a lens group arranged on an object side of a widest air interval at a wide-angle end is defined as the front group and a lens group arranged on an image side of the widest air interval at the wide-angle end is defined as the rear group, the front group having a negative refractive power, the rear group having a positive refractive power. Changing focal length from the wide-angle end to the telephoto end is performed by changing an air interval between the lens groups.

A small observation optical system having a high resolution, an observation imaging device that includes the observation optical system, an observation imaging system, an image forming lens system, and a method of adjusting the observation optical system. The observation optical system includes an objective lens system Gand an image forming lens system G, sequentially from the observation object side, and the image forming lens system Gforms an observation object image forms through the objective lens system G, on an image plane IP of an image sensor, and satisfies predetermined condition.

Observation optical system, observation imaging device, observation imaging system, image forming lens system, and method of adjusting observation optical system

A zoom lens has in order from the object side, at least a foremost, first lens group having positive refractive power, a succeeding, second lens group having negative refractive power, a third lens group having positive refractive power, and a rearmost lens group having negative refractive power. The zoom lens meets requirements as defined in formulas regarding a displacement of the first lens group, a focal length of the zoom lens at the wide-angle end, a focal length of the zoom lens at the telephoto end, a focal length of the first lens group, and a focal length of the third lens group.

Zoom lens and camera device

The zoom lens comprises five or more groups of lens pieces, namely, the foremost or first lens group of positive refractive power located the closest to an object, the succeeding second lens group of negative refractive power, the third lens group of positive refractive power, the fourth lens group of positive refractive power, and the fifth lens group all arranged in this order, and if any, the rearmost lens group(s) closer to the imaging plane than the fifth lens group. The zoom lens meets requirements as defined in the conditional expression regarding a combined magnification of the fifth lens group and, if any, the rearmost lens group(s) closer to the imaging plane than the fifth lens group while the zoom lens is taking a telephoto position.

The optical system of the present invention includes, in order from an object side: a first lens group Ghaving positive refractive power; a second lens group Ghaving negative refractive power; and a third lens group Ghaving positive refractive power, wherein the first lens group Gand the third lens group Gare fixed in an optical axis direction, while the second lens group Gis moved in the optical axis direction to focus on from an object at infinity to an object at a finite distance, the third lens group Gincludes, in order from the object side: an object-side group G; an aperture stop S; and an image-side group G, and a specified condition is satisfied.

Optical system and image pickup apparatus

An optical system of the present invention includes, in order from an object side: a first lens group G; a second lens group Ghaving positive refractive power; and a third lens group Ghaving positive refractive power, wherein the first lens group Gand the third lens group Gare fixed in an optical axis direction while the second lens group Gis moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.

The zoom lens including an object side lens group at least including, in order from an object side: a first lens group Ghaving positive refractive power; and a second lens group Ghaving negative refractive power; and an image focusing side lens group including, in order from the object side: a negative lens group A having negative refractive power; and a negative lens group B arranged by facing the negative lens group A across an air distance, having negative refractive power. In the zoom lens, focusing from infinity to a close object is achieved by moving just the negative lens group A toward an image focusing side to satisfy a conditional expression.

An object of the present invention is to provide a low-cost, miniature, wide-angle high-zoom-ratio zoom lens that has high imaging performance, and an imaging apparatus equipped with the zoom lens. To achieve the object, a zoom lens including a first lens group having positive refracting power, a second lens group having negative refracting power and a third lens group having positive refracting power in order from an object side in which a lens group P having positive refracting power is arranged closer to an image plane side than the third lens group.

Provided are: a zoom lens which exhibits a large variable-power ratio, an increased degree of freedom with respect to aberration correction, and which has been achieved having a sufficient reduction in size in the optical axis direction; and an imaging device equipped therewith. The zoom lens includes at least, from the object side, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group, and a fifth lens group, in that order. In the zoom lens, prescribed conditions are satisfied.

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Tokyo, Japan

Yoshito Iwasawa