Olympus Corporation

Olympus Optical Company, Ltd.

Olympus Medical Systems Corporation

Toyoharu Hanzawa

Shinichi Mihara

Masahito Watanabe

Atsujiro Ishii

Tetsuhide Takeyama

Ayami Imamura

Hirokazu Konishi

Takashi Fukaya

Toshihide Nozawa

Hisashi Goto

Yuji Miyauchi

Tsutomu Uzawa

Susumu Takahashi

Yuko Kobayashi

Nobuaki Akui

Masahiro Imamura

Kouki Hozumi

Takuji Horie

Katsuyuki Saito

Kenji Yoshino

Hitoshi Karasawa

Akio Nakada

Hiroshi Fujiwara

Toshihiko Hashiguchi

Akihiko Mochida

Akihiro Taguchi

Masahiko Kinukawa

Atsushi Kidawara

Iwao Kanamori

Masami Hamada

Shinichi Nakamura

Kimihiko Nishioka

Shinji Yamashita

Keisuke Saito

Takeshi Suga

Tomoyuki Satori

Shigeru Kato

Yoshihiro Kawano

Masao Uehara

Kazuo Morita

Tomonori Ishikawa

Wataru Ohno

Akira Murata

Yasushi Namii

Masahito Goto

Shigeo Tokunaga

Shingo Kato

Masaaki Yamagishi

Hideki Koyanagi

Tetsumaru Kubota

Yoshinao Oaki

Yoshiharu Saito

Yoshiharu Takasugi

Masanori Kaneda

Satoshi Honma

Makoto Tomioka

Azusa Noguchi

A stereoscopic vision endoscope objective optical system includes, in order from an object side, a first lens group having a negative refractive power, a second lens group having a positive refractive power, and a rear-side lens group having a positive refractive power. The rear-side lens group includes a first rear group and a second rear group. The first lens group and the second lens group are disposed so that an optical axis of the second lens group coincides with an optical axis of the first lens group. The optical axis of the first lens group is located between an optical axis of the first rear group and an optical axis of the second rear group. Each of the first rear group and the second rear group includes a first sub group, an aperture stop, and a second sub group, and the first sub group includes a negative lens.

Stereoscopic vision endoscope objective optical system and endoscope using the same

A stereoscopic vision optical system includes a first lens group having a negative refractive power, disposed nearest to an object, a second lens group having a positive refractive power, and a rear-side lens group having a positive refractive power. The rear-side lens group includes a first rear group and a second rear group. The optical axis of the first lens group, an optical axis of the first rear group, and an optical axis of the second rear group is positioned on the same plane. The optical axis of the first lens group is positioned between the optical axis of the first rear group and the optical axis of the second rear group, and the following conditional expression (1) is satisfied:0.08&#x2264;((&#x2212;/2)&#xd7;(1/2))&#xd7;(1/)&#x2264;0.25&#x2003;&#x2003;(1).

Stereoscopic vision optical system and endoscope using the same

The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-bending zoom optical system comprising, in order from its object side, a 1-1st lens group G-comprising a negative lens group and a reflecting optical element P for bending an optical path, a 1-2nd lens group G-comprising one positive lens and a second lens group Ghaving positive refracting power. For zooming from the wide-angle end to the telephoto end, the second lens group Gmoves only toward the object side. The electronic image pickup system also comprises an electronic image pickup device I located on the image side of the zoom optical system.

Electronic image pickup system

The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-banding zoom optical system comprising, in order from its object side, a 1-1st lens group G-comprising a negative lens group and a reflecting optical element P for bending an optical path, a 1-2nd lens group G-comprising one positive lens and a second lens group Ghaving positive refracting power. For zooming from the wide-angle end to the telephoto end, the second lens group Gmoves only toward the object side. The electronic image pickup system also comprises an electronic image pickup device I located on the image side of the zoom optical system.

The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-bending zoom optical system comprising, in order from its object side, a-st lens group G-comprising a negative lens group and a reflecting optical element P for bending an optical path, a-nd lens group G-comprising one positive lens and a second lens group Ghaving positive refracting power. For zooming from the wide-angle end to the telephoto end, the second lens group Gmoves only toward the object side. The electronic image pickup system also comprises an electronic image pickup device I located on the image side of the zoom optical system.

A depth expansion apparatus includes an image-pickup-optical-system and an image-pickup-device (hereinafter, IPS) configured to form and pick up images A and B in different focus positions, and a depth-expanded-image forming section configured to generate, based on the images A and B, a depth-expanded-image that maintains a relation between a distance from an object point to the image-pickup-optical-system and luminance. When an image side NA of the image A is represented as NA', a resolution determined by the IPS, as R, an optical path interval between image forming surfaces for the images A and B, as d, NA of an image at a near photographing distance among the images A and B, as NAn, and NA of an image at a far photographing distance among the images A and B, as NAf, the IPS satisfy the following conditional expressions (1) and (2):&#x2032;/2&#x2266;&#x2003;&#x2003;(1)0.05&#x2266;()&#x2266;0.9&#x2003;&#x2003;(2).

Focal depth expansion device

The invention relates to an electronic image pickup system whose depth dimension is extremely reduced, taking advantage of an optical system type that can overcome conditions imposed on the movement, of a zooming movable lens group while high specifications and performance are kept. The electronic image pickup system comprises an optical path-bending zoom optical system comprising, in order from its object side, a 1-1st lens group G-comprising a negative lens group and a reflecting optical element P for bending an optical path, a 1-2nd lens group G-comprising one positive lens and a second lens group Ghaving positive refracting power. For zooming from the wide-angle end to the telephoto end, the second lens group Gmoves only toward the object side. The electronic image pickup system also comprises an electronic image pickup device I located on the image side of the zoom optical system.

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.

An optical system 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 the determination of a focal length in said 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.

An image pickup apparatus comprising a first lens unit which comprises at least a negative lens element and at least a positive lens element and has negative refractive power, a second lens unit which has positive refractive power, and an optical path bending reflecting optical element which has a variable reflecting surface disposed in an airspace between a most object side lens component of the first lens unit and a most object side lens component of the second lens unit. This image pickup apparatus changes a magnification by moving the second lens unit along an optical axis and corrects a deviation of an image location by varying a shape of the variable reflecting surface of the reflecting optical element.

Image pickup apparatus having image pickup optical system

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Mitaka, Japan

Toyoharu Hanzawa