Olympus Optical Company, Ltd.

Olympus Corporation

Taisho Pharmaceutical Co., Ltd.

Mitsui Chemicals, Inc.

Olympus Imaging Corporation

Yuko Kobayashi

Shinichi Mihara

Yuji Miyauchi

Tsutomu Uzawa

Toshihide Nozawa

Hisashi Goto

Toyoharu Hanzawa

Masahiro Imamura

Kouki Hozumi

Takuji Horie

Masakazu Sato

Takaaki Ishii

Noriyuki Iyama

Hideaki Amada

Noriyuki Miyata

Takanori Yamanashi

Katsuhiro Takada

Toshio Takahashi

Seiji Shimizu

Norihiko Aoki

Juro Kikuchi

Ayami Imamura

Hiroshi Takase

Shinichi Dosaka

Ken Yonekubo

Yuji Inatomi

Haruo Maeda

Tomoya Terauchi

Akihiro Koide

Hiroyuki Kurita

Toshinori Matsuda

Takayosi Togino

Kenichi Harada

A zoom optical system that comprising: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power which are arranged in order from an object side, a space between the lens units being changed to perform variation of magnification, the first lens unit includes a negative lens, the second lens unit includes a positive lens and a negative lens in order from the object side, the third lens unit includes a positive lens, and an electronic equipment provided with the zoom optical system.

Zoom optical system and electronic equipment using the same

An object of the present invention is to provide a lithographic printing plate with a hydrophilic layer mainly made from resins which has a photosensitivity to the light in near infrared region, on which images can be printed directly with laser beam, requiring no development and wiping off operation, and immediately recovering from ink stains without any difficulties when an ink attaches to non-image areas on printing, and a photosensitive resin composition applied to the printing plate. A lithographic printing original plate having a photosensitive layer formed on a support is characterized in that the surface of the photosensitive layer has a phase-separation structure, and the recessed parts are formed on the surface of a photosensitive layer by the dissolution of one component of photosensitive layer constituting the phase-separation and the surface of the photosensitive layer is changed to have affinity for ink by irradiation with light.

Lithographic printing original plate and lithographic printing plate

An optical system is presented that enables images of a wide range of natural subjects to be well reproduced with their colors, and provides an image pickup system including, at least, an image pickup optical system, an electronic image pickup device having three or more different spectral characteristics to obtain a color image, and a controller for implementing signal processing or image processing on the basis of an output from the electronic image pickup device. The optical element that takes part in determining the focal length in the image pickup system includes an optical element making use of a refraction phenomenon alone. The 400-nm wavelength input/output ratio is 10% or less with respect to an input-output ratio for a 400-nm to 800-nm wavelength at which an output signal strength ratio with respect to an input quantity of light is highest when the input quantity of light is defined by the quantity of a light beam emanating from the same object point and entering the image pickup optical system and the output signal strength is defined by the strength of a signal produced from the controller in response to the light beam.

Image pickup device and image pickup optical system

An optical system enables images to be well reproduced with their colors, and provides an image pickup system including an image pickup optical system, an electronic image pickup device to obtain a color image and a controller for implementing signal processing or image processing on the basis of an output from the electronic image pickup device. The optical element that takes part in the determination of a focal length includes an optical element making use of a refraction phenomenon alone. The 400-nm wavelength input/output ratio is 10% or less with respect to an input-output ratio for a 400-nm to 800-nm wavelength at which an output signal strength ratio with respect to an input quantity of light is highest when the input quantity of light is defined by the quantity of a light beam emanating from the same object point and entering the image pickup optical system and the output signal strength is defined by the strength of a signal produced from the controller in response to the light beam.

The invention is concerned with a small-format yet high-performance zoom optical system with a fewer lenses count, and an electronic system that incorporates it. The zoom optical system comprises, in order from its object side, a first lens unit Gof negative refracting power, a second lens unit Gof positive refracting power and a third lens unit Gof negative refracting power, in which zooming is implemented by movement of at least the second lens unit Gand the third lens unit Gthereby varying a space between adjacent lens units. The negative first lens unit Gis composed of one negative lens, the positive second lens unit Gis composed of one positive lens, and the negative third lens unit Gis composed of one negative lens. The negative lens in the third lens unit Gis in a negative meniscus shape with a concave surface on its image plane side.

Zoom optical system and imaging system using the same

The invention relates to an electronic image pickup system that enables a wide image-pickup, and ensures that even when an image is printed, sufficient image quality and clearness are obtained from the center to as far as the margin of the image and the image of a subject is depicted with a sense of extension. The electronic image pickup system comprises an image-formation optical systemfor forming an image of a subject and an electronic image pickup devicelocated on an image side of the image-formation optical system for obtaining image information on the image. The angle between the farthest-off-axis chief ray incident on the farthest off-axis site on an image pickup plane of the electronic image pickup device and an axial chief ray incident on the center of the image pickup plane satisfies condition (1) for determining the angle of view suitable to obtain the sense to extension demanded for landscape photography and sharpness all over the image and condition (2) for allowing a light bundle incident on the image pickup device to be substantially vertically incident on the image pickup plane. The image pickup devicesatisfies condition (3) for determining the effective number of pixels on the image pickup device or the maximum number of recording pixels by signal processing.

Image pickup system

The present invention relates to an inhibitor for production of 20-hydroxyeicosatetraenoic acid, comprising, as an effective ingredient, specific hydroxyformamidine derivatives or pharmaceutically-acceptable salts thereof. The inhibitors according to the present invention are useful as therapeutic agents for kidney diseases, cerebrovascular diseases, or circulatory diseases. In addition, the present invention also provides novel hydroxyformamidine derivatives or pharmaceutically-acceptable salts thereof.

20-HETE synthase inhibitor

The invention relates to an optical system which, albeit being simple in construction, enables images of a wide range of natural subjects to be well reproduced with their colors, and provides an image pickup system comprising, at least, an image pickup optical system, an electronic image pickup devicehaving three or more different spectral characteristics to obtain a color image and a controllerfor implementing signal processing or image processing on the basis of an output from the electronic image pickup device. The optical element that takes part in the determination of a focal length in said image pickup system comprises an optical element making use of a refraction phenomenon alone. The 400-nm wavelength input/output ratio is 10% or less with respect to an input/output ratio for a 400-nm to 700-nm wavelength at which an output signal strength ratio with respect to an input quantity of light is highest with the proviso that the input quantity of light is defined by the quantity of a light beam emanating from the same object point and entering the image pickup optical system and the output signal strength is defined by the strength of a signal produced from the controllerin response to the light beam.

An inhibitor for 20-hydroxyeicosatetraenoic acid production which comprises as the active ingredient a specific hydroxyformamidine derivative or a pharmacologically acceptable salt thereof. It is useful especially as a remedy for kidney diseases, cerebrovascular diseases, or circulatory diseases. The novel hydroxyformamidine derivative or pharmacologically acceptable salt thereof is also provided.

Inhibitor for 20-hete-yielding enzyme

The invention relates to a zoom lens system which is compatible with a TTL optical finder having a diagonal field angle of at least 70&deg; at the wide-angle end and about 7 to 10 magnifications and is fast as represented by an F-number of about 2.8 at the wide-angle end. The zoom lens system comprises a first lens group G1 which is movable along its optical axis during zooming and has positive refracting power, a second lens group G2 which moves toward the image side along the optical axis during zooming from the wide-angle end to the telephoto end and has negative refracting power and rear lens groups G3 to G6 having at least two spacings variable during zooming. In particular, the focal length f of the first lens group G1 should meet 6<f /L<20 where L is the diagonal length of an effective image pickup surface I located in the vicinity of an image-formation plane.

Zoom lens

Hydroxyformamidine derivatives and medicines containing the same

The invention relates to a zoom lens system which is compatible with a TTL optical finder having a diagonal field angle of at least 70&deg; at the wide-angle end and about 7 to 10 magnifications and is fast as represented by an F-number of about 2.8 at the wide-angle end. The zoom lens system comprises a first lens group G which is movable along its optical axis during zooming and has positive refracting power, a second lens group G which moves toward the image side along the optical axis during zooming from the wide-angle end to the telephoto end and has negative refracting power and rear lens groups G to G having at least two spacings variable during zooming. In particular, the focal length f of the first lens group G should meet 6<f /L<20 where L is the diagonal length of an effective image pickup surface I located in the vicinity of an image-formation plane.

A photometric apparatus which satisfies the demands for reductions in the size, thickness and cost and which is highly optioned despite a simple arrangement. A photometric optical system provided separately from a photographic optical system ( ) has at least one diffractive optical element ( ). The diffraction surface of the diffractive optical element ( ) is provided on a convex lens surface to have a converging action. Alternatively, the diffraction surface of the diffractive optical element ( ) is provided on a concave lens surface to have a diverging action.

Photometric apparatus for camera

Growing community of inventors

Hachioji, Japan

Yuko Kobayashi