Nikon Corporation

Megachips Corporation

Kensuke Uchida

Akihiko Obama

Hiroshi Yamamoto

Taku Matsuo

Norikazu Yokoi

Toru Miyakoshi

Nobuhiro Minami

Kazuma Takahashi

Shogo Iwai

A catadioptric system (LS) is provided with: a first reflecting mirror (M) that reflects light from an object; a second reflecting mirror (M) that reflects light reflected by the first reflecting mirror (M); a first lens group (G) that transmits light reflected by the first reflecting mirror () and travelling toward the second reflecting mirror (M), and transmits light reflected by the second reflecting mirror (M); and a second lens group (G) that transmits light reflected by the second reflecting mirror (M) and transmitted through the first lens group (G). The catadioptric system is configured that an image of the object is formed by light transmitted through the second lens group (G).

Catadioptric system and optical device

A first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, a fourth lens group (G) having positive refractive power, a fifth lens group (G) are arranged in order from an object, and a distance between the first lens group (G) and the second lens group (G), a distance between the second lens group (G) and the third lens group (G), a distance between the third lens group (G) and the fourth lens group (G), and a distance between the fourth lens group (G) and the fifth lens group (G) change upon zooming, and a lens group arranged closest to an image is approximately fixed against an image surface (I) upon zooming, and the third lens group (G) moves along the optical axis upon focusing, and the following expression (1) is satisfied.&#x2003;&#x2003;()

Zoom optical system, optical device and method for manufacturing the zoom optical system

A variable magnification optical system includes: a positive first lens group; a negative lens group closer to an image than the first lens group; a positive lens group closer to the image than the negative lens group and including at least one lens closer to the image than an aperture stop; and a focusing group between the negative lens group and the positive lens group. When varying magnification, the first lens group moves with respect to an image plane, and distances between the first lens group and the negative lens group and between the negative lens group and the positive lens group are changed. When focusing, a distance between the focusing group and a lens facing an object-side of the focusing group is changed, and a distance between the focusing group and a lens facing an image-side of the focusing group is changed. Predetermined conditional expressions are satisfied.

Variable magnification optical system, optical apparatus, and variable magnification optical system manufacturing method

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 having positive refractive power, a fifth lens group are arranged in order from an object. Respective distances between the first and second lens groups, the second and third lens groups, the third and fourth lens groups, and the fourth lens and fifth lens groups change upon zooming, and a lens group arranged closest to an image is approximately fixed relative to an image surface upon zooming. The third lens group moves along the optical axis upon focusing, and the following expression (1) is satisfied:0.480&#x3c;3/&#x3c;4.000&#x2003;&#x2003;(1)where ft denotes a focal length of the zoom optical system in a telephoto end state, and f3 denotes a focal length of the third lens group.

A variable magnification optical system includes: a first lens group having positive refractive power and arranged closest to an object; a negative lens group having negative refractive power; a positive lens group which has positive refractive power, which includes at least one lens that moves integrally with an aperture stop, and which is arranged closer to an image than the negative lens group; and a focusing group arranged between the negative lens group and the positive lens group. When varying magnification, distances between the first lens group and the negative lens group and between the negative lens group and the positive lens group are changed. When focusing, distances between the focusing group and a lens facing an object-side of the focusing group and between the focusing group and a lens facing an image-side of the focusing group are changed. A predetermined conditional expression is satisfied.

An image processing apparatus includes a plurality of image processing module parts, a module arbiter part, and a DMAC (Direct Memory Access Controller) part. Each of the image processing module parts includes a module core for executing a predetermined image processing. The plurality of image processing module parts is connected to the module arbiter part. The module arbiter part arbitrates memory access which is given by the plurality of image processing module parts through a bus. The DMAC part is connected between the module arbiter part and the bus, and executes memory access related to the arbitration result obtained by the module arbiter part.

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Fujisawa, Japan

Kensuke Uchida