Canon Kabushiki Kaisha

Asahi Kogaku Kogyo Kabushiki Kaisha

Matsushita Electric Industrial Co., Ltd.

Canon Precision Inc.

Asahi Optical Co., Ltd.

Koichiro Nishikawa

Osamu Nagatsuka

Tsuguhide Sakata

Akinori Hashiguchi

Michiie Sakamoto

Shinobu Masuda

Osamu Koyama

Masahide Hasegawa

Masakuni Yamamoto

Masahiro Ando

Akihiro Tanaka

Yasumori Hino

Hiroshi Yamamoto

Suguru Takishima

Kenichi Sasaki

Isao Okuda

Masahiko Sasaki

Chihiro Nagura

Kazuyoshi Ishii

Eiji Ueda

Eiichi Fujii

Koji Kimura

Takashi Fukuhara

Makoto Iwaki

Hiroshi Kokado

Haruhiko Horiguchi

Shinnosuke Torii

Wataru Kubo

Shigeki Sakurai

Junichi Takeda

Takuji Okamoto

Katsuyuki Tanaka

Hiroki Kobayashi

Masami Ninomiya

Hiroshi Motohashi

Shinnosuki Torii

A microscope system comprises a microscope body, a stage configured to place a slide as an observation target and move in an X direction and a Y direction. The microscope system changes an arrangement of the placed slide with respect to the stage so as to cause a direction indicated by a mark provided on the slide placed on the stage to align with one of the X direction and the Y direction of the stage.

Microscope system, control method, and program

A stage apparatus for a microscope includes a first stage provided on a mirror base of the microscope and fixed to a stage member that moves in an optical axis direction, a second stage that relatively moves over a surface of the first stage in a first direction, a third stage that relatively moves over a surface of the second stage in a second direction, the third stage having a placement portion for placing a microscope slide, and an exterior cover for covering at least a portion of the second stage and the third stage, the exterior cover being fixed to the first stage or the stage member. The exterior cover provides a space for the second stage and the third stage to move, and exposes the placement portion of the third stage.

Stage apparatus

A microscope system comprises a microscope body, an imaging unit connected to the microscope body and including an image sensor for capturing a microscopic image, and an XY stage configured to place a slide and move in an X direction and a Y direction. The microscope system changes an arrangement of the image sensor with respect to the microscope body so as to cause a direction defined by a pixel arrangement of the image sensor to align with one of the X direction and the Y direction of the XY stage.

Microscope system, control method thereof, and program

A microscope system comprises a microscope body, an image sensor mounted on the microscope body, and a stage that moves in an X-axis direction and a Y-axis direction, and places a slide as an observation object. The stage includes a mark used to indicate a stage reference position. The microscope system obtains positions of the stage in the X-axis direction and the Y-axis direction, and detects the stage reference position indicated by a mark provided on the stage and a slide reference position indicated by a mark provided on a slide placed on the stage. The microscope system manages the position of the stage by coordinates based on the slide reference position if the slide reference position is detected, and manages the position of the stage by coordinates based on the stage reference position if the slide reference position is not detected.

Microscope system and control method thereof

There is provided an optical information recording/reproducing apparatus including a unit for detecting the focus error signal from the reflected light flux from a recording layer of an optical recording medium, and a unit for focusing the light flux on the recording layer of the optical disk on the basis of the focus error signal. In the case of detecting the focus error signal, the light flux of the effective numeric aperture NAeff&#x3c;1 due to an objective lens and the SIL within a pupil is obtained by a splitting device as the focus error signal, whereby it is possible to suppress the reflected light from the bottom surface of the SIL from being mixed into the focus error signal as a noise.

Optical information recording/reproducing apparatus

An optical information recording/reproduction apparatus includes a correction device that corrects aberration, due to a change in thicknesses of a transparent substrate and spherical aberration generated by inserting an optical attenuation device into an optical path or retreating the optical attenuation device from the optical path, by changing intervals between a plurality of lenses. The correction device is disposed between an objective lens and a light source. The correction device also functions as a collimator lens. The optical attenuation device is provided in an optical path of diverging light flux from the light source to the correction device, for attenuating an optical output from the light source. A discrimination circuit discriminates (i) a kind of the optical recording medium and (ii) an insertion of the optical attenuation device into the optical path or a retreating of the optical attenuation device from the optical path, and produces a discrimination result. A learning circuit performs a learning process by searching for a correction amount, while the correction device changes the intervals between the plurality of lenses, and a circuit changes initial positions of the intervals between the plurality of lenses at a start of the learning process performed by the learning circuit, in accordance with the discrimination result produced by the discrimination circuit.

Information recording/reproduction apparatus

Provided is a spatial light modulator SLM and a photodetector element CMOS sensor are placed on the same chip, and the alignment thereof and a relay lens system are eliminated, whereby an optical system is reduced in cost and made compact. Specifically, provided is an optical information recording and reproducing apparatus for recording information by allowing information light and reference light to interfere with each other and reproducing the information using the reference light including: a light source; a spatial light modulator for generating at least an information light with respect to a light beam from the light source; an objective lens for irradiating a recording medium with the light beam from the spatial light modulator; and a photodetector element for receiving a reproduction light from the recording medium, in which the spatial light modulator and the photodetector element are formed on the same semiconductor substrate.

Optical information recording and reproducing apparatus

Provided is an optical pickup apparatus which has a function for correcting spherical aberration caused by a thickness error of a transparent substrate and which is sufficiently compact, wherein a collimator lens used in the apparatus is composed of two lens groups, an interval between the two lens groups is changeable, and therefore spherical aberration caused by the thickness error of the transparent substrate is corrected.

Optical pickup apparatus including collimator lens with first lens group having negative power and being fixed and second lens group having positive power and being movable

The recording mediumis radiated with light beam from the second light source to obtain servo signal from the reflected light. At least one of the relay lensesin the relay optical system is moved perpendicularly to the optical axis according to the servo signal to follow-up moving direction of the recording medium. The light beam from the second laser light source merges with an optical system from the first laser light source to the recording mediumbetween at least one of the relay lensesand the spatial light modulator

Optical information recording-reproduction apparatus

The present invention provides an optical recording medium capable of detecting groove start signals and groove end signals with an inexpensive detection circuit and allowing quick, stable clock detection and tracking pull-in, which optical recording medium is constructed in such a way that the depth Dof the grooves satisfies D/(&#x3bb;/N)&#x3c;0.16, where &#x3bb; is a wavelength of a light beam and N is an index of refraction of a substrate, and that the distance Lbetween the groove edge and the pit closest thereto satisfies L&#x3e;1.2 FWHM, where FWHM is a full width at half maximum of the light beam in the track direction.

Optical recording medium having servo area and groove section

The present invention provides a method of recording information on a magneto-optical recording medium of domain wall displacement type having a preformat area and a data area succeeding thereto, comprising the steps of generating a reproduction signal from said medium by utilizing a light beam, detecting a reference position based on said reproduction signal, determining, based on a result of the detection, a recording start timing at which a formation of a recording magnetic domain is started at a distance at least not shorter than a displacement amount of a domain wall away from a start position of said data area; and starting a recording with said determined recording start timing.

Recording method and apparatus of domain wall displacement type magneto-optical recording medium

An optical information reproducing apparatus for reproducing information by irradiating a recording medium with a reproducing light beam includes a light source for generating the reproducing light beam, a reproducing circuit for reproducing a reproduction signal by using the light beam, and an adjusting circuit for adjusting the light beam power. The adjusting circuit adjusts the beam power to a value larger than the light beam power at which a value obtained by normalizing the reproduction signal with the beam power is maximized.

Optical information reproducing apparatus having circuit for adjusting reproducing power

A method of exposure to a light pattern containing a first strip-shaped portion extending in a first direction and a second strip-shaped portion extending in a second direction comprises steps of placing, on a light-receiving face, a first mask having a strip-shaped slit corresponding to the first strip-shaped portion extending in a first direction of the pattern, projecting, to the first mask, a first linearly polarized light beam polarized in the second direction to irradiate the light-receiving face through the slit of the first mask, removing the first mask from the light-receiving face, and placing, on the light-receiving face, a second mask having a strip-shaped slit corresponding to the second strip-shaped portion extending in a second direction of the pattern and projecting, to the second mask, a second linearly polarized light beam polarized in the first direction to irradiate the light-receiving face through the slit of the second mask.

Light exposure method

A method for reproducing information from a magneto-optical medium which includes a memory layer composed of magnetic film and a displacement layer composed of a magnetic film laminated with the memory layer is provided. Information signals are recorded on magnetized areas arranged in a predetermined direction on the memory layer. Domain walls having arc shapes curved in the same direction are formed on borders of the magnetized areas. The method includes the steps of: forming a high temperature area having shape of a circle or an elongated circle in the medium by scanning an array of the magnetized areas on the memory layer with a light spot in a direction toward convexities of the arc shapes of the magnetized areas; transferring one of the magnetized areas together with a domain wall to the displacement layer when a front end of the high temperature area reaches a domain wall at a front end of one of the magnetized areas in the memory layer in accordance with the scanning with the light spot; displacing the domain wall of the magnetized area transferred to the displacement layer toward a center of the high temperature area to magnify the magnetized area; and reproducing information by detecting reflected rays of the light spot in a condition where the magnetized area transferred to the displacement layer is magnified.

Growing community of inventors

Takasaki, Japan

Koichiro Nishikawa