Minolta Camera Kabushiki Kaisha

Minolta Company, Ltd.

Minolta Camera Co., Ltd.

Minolata Co., Ltd.

Minaltacco., Ltd.

Hiromu Mukai

Nobuyuki Taniguchi

Kohtaro Hayashi

Shuji Izumi

Masaaki Nakai

Akihiko Fujino

Toshio Yamaki

Tokuji Ishida

Toshihiko Karasaki

Shigeto Ohmori

Hisashi Tokumaru

Hiroshi Ootsuka

Yasuo Maeda

Yoshinobu Kudo

Jun Ishihara

Hideki Nagata

Takashi Okada

Kunio Kawamura

Ichiro Kasai

Yuichiro Ori

Yasumasa Sugihara

Taro Shibuya

Masataka Hamada

Kazuhiko Ishimaru

Takeo Hoda

Takehiro Katoh

Tetsuo Kohno

Kazuo Kimura

Hisayuki Masumoto

Tsutomu Honda

Akira Funahashi

Eiji Yamakawa

Hideo Kajita

Hirokazu Yagura

Makoto Ando

Ken Tanino

Ichiro Tsujimura

Etsuko Nakai

Kyoichi Miyazaki

Dai Shintani

Hiroyuki Okada

Takeshi Hashimoto

Takashi Kondo

Sadafusa Tsuji

Shinji Tominaga

Hiroyuki Matsumoto

Junji Hashimura

Hitoshi Hagimori

Masashi Isono

Minoru Kuwana

Masatoshi Kamitani

Yasuo Yamazaki

Yasuteru Yamano

Haruo Kobayashi

Masayuki Ikemura

Shuzo Matsushita

Yujiro Mima

Kazumi Kageyama

Yutaka Inoue

Katsuto Tanaka

Koji Hata

Akira Shiraishi

Kyoko Yamaguchi

Osamu Hatamori

Tomoo Doi

Koji Miyai

Rieko Hasegawa

Yoshinori Sugiyama

Kagumi Kojiya

Katsumi Kosakai

An image pickup device has an image sensor having rectangular light receiving portions arranged in a matrix, and microlenses disposed in correspondence with said light receiving portions, said light receiving portions and said microlenses being formed integrally with each other, an image input optical system for forming an image on said image sensor, said image input optical system including a diaphragm whose shape in a horizontal direction coincides with a shape of said light receiving portions of said image sensor.

Image pickup device

Image sensing apparatus which intentionally retains longitudinal chromatic aberration

A communication device having an image transmission function such as a video phone or a camera-equipped cellular phone. The image transmission function is capable of capturing an object image using an optimal size.

Communication device having an image transmission function

A diffractive optical element acts as a lens. The optical element has a diffraction grating. The diffractive grating is provided with a plurality of ridges. Each of the ridges has a transmissive surface. A sectional profile of the transmissive surface is composed of a plurality of successively connected strait lines of an identical length. The length varies from one ridge to another.

Diffractive optical element and method of manufacturing a mold

A focusing screen for use in a camera has a diffusive surface having a plurality of random pattern cells of one or a plurality of types arranged two-dimensionally so as to form a macroscopically flat surface. The random pattern cells are each composed of a plurality of minute rectangular elements having one of two to eight types of heights, and the individual rectangular elements are arranged irregularly so as to constitute a plurality of types of diffraction gratings having different grating pitches.

Focusing screen for use in camera

At minimum, a member near an image plane that is observed through an eyepiece is made of antistatic resin obtained by giving the resin itself ion conductivity so that its antistatic effect can be of long duration.

Antistatic viewfinder

A camera including a first and second luminance detector, a distance detector and a calculator. The first luminance detector, having a first spectral sensitivity and receiving light from a larger region of a photographing view, generates a first luminance information. The distance detector, having a second spectral sensitivity and receiving light from a smaller region of the photographing view, generates a distance information concerning a distance to an object. The second luminance detector generates a second luminance information based on the received light of the distance detector. The calculator calculates a control luminance value for exposure control based on the first luminance information and the second luminance information when the first luminance information is above a predetermined threshold value. In addition, the calculator calculates a control luminance value based on the first luminance information when the first luminance information is below the predetermined threshold value.

Camera

A lens holding structure in a lens block forming all or part of an optical system, the lens holding structure capable of attaining a compact lens block of inexpensive and simple construction by using a holding barrel having an outer diameter smaller than an outer diameter of the largest lens element to be included in the lens block. The largest lens element is fixed to another lens element to be included in the lens block or the holding barrel by a face thereof having a predetermined angle with respect to an optical axis of the lens block.

Lens holding structure in a lens block forming all or part of an optical system and method of assembling the lens block

A viewfinder optical system has a relay lens system. The relay lens system focuses a primary image to form a secondary image. The relay lens is provided at an optical conjugate point with respect to a pupil. A surface of the relay lens system has an optical power of diffraction. The surface is positioned between the primary image and the optical conjugate point. The surface also has optical power of refraction.

Viewfinder optical system

An optical system includes a first optical element formed of a noncrystalline polyester resin having a copolymer ratio of 9,9-bis [4(2-hydroxyethoxy) phenyl]fluorene in a range of 35 molar percent to 45 molar percent when the dicarboxylic acid component is 100 molar percent, and a second optical element formed of material incorporating an ultraviolet light absorption agent and disposed at least either anteriorly or posteriorly to the first optical element.

Optical system having an optical element made of resin

A viewfinding system for use with an optical system that creates a first object image includes an objective block which is sealed as a unit. The objective block includes a focusing screen for forming the first object image and relay optics for transmitting the first object image. A zoom block includes a zoom optical system for providing a modification of the magnification of the first object image to provide a second object image. An eyepiece block receives the second object image and includes a reflecting member and an eyepiece through which the second object image is observed. The eyepiece block is sealed and the second object image is realized within the sealed eyepiece block.

Zoom viewfinder system for single reflex camera

An optical system has a diffractive optical element. A diffractive optical surface of the optical element has a blaze-shaped diffraction grating. The grating heights are smaller in the peripheral region of the grating than in the central region of the grating around its optical axis. The optical element acts as a lenses a result of light rays being deflected by the light-diffracting action of the diffractive optical surface.

Diffractive optical element, an optical system having a diffractive

A viewfinder optical system has a relay lens system and an eyepiece optical system. The relay lens system refocuses a primary image as a secondary image. The relay lens system consists of a single lens element which has a surface having optical power of diffraction. The eyepiece optical system magnifies the secondary image and has a surface having optical power of diffraction.

A zoom lens system includes two lens components, and zooming is performed by moving a first lens component. The zooming is performed along a zoom curve such that the first lens component is moved out so that in-focus condition is obtained at a subject distance predetermined with respect to each focal length. As the subject distance, an excess focal length or a subject distance where the far side of the depth of field is the maximum flash reachable distance or a subject distance where the near side of the depth of field is the shortest object distance or a subject distance where the object distance or the magnification is fixed is set according to the purpose.

Zoom lens system

An eyepiece lens has a single lens element having a positive optical power, and the single lens element has a refractive power of an aspherical surface and a diffractive power. The eyepiece lens satisfies the following condition:

Growing community of inventors

Kawachinagano, Japan

Hiromu Mukai