Ricoh Company, Ltd.

Kabushiki Kaisha Topcon

Maruha Nichiro Seafoods, Inc.

Japan As Represented by Director General of National Institute of Health Sciences

Hiroshi Akiyama

Yoshitaka Takahashi

Masahiko Nakayama

Hideaki Hirai

Masahiro Akiba

Masami Emoto

Hiroshi Koide

Takefumi Hayashi

Makoto Fujino

Michiko Nakanishi

Shigeru Oohchida

Yukiko Hamano

Yoshinori Hayashi

Yasufumi Fukuma

Tomohiro Nakajima

Hisashi Tsukada

Manabu Seo

Eiichi Yanagi

Hideo Maeda

Hiroshi Oda

Goichi Akanuma

Kazutoshi Takagi

Shigeru Oouchida

Kosuke Seiki

Hisashi Yoshioka

Yuichi Sugino

Katsuhiro Higuchi

Tamio Maitani

An ophthalmic surgical apparatus includes an observation optical system, an illumination optical system, an interference optical system, and an image forming unit. The observation optical system is configured to observe an eye through an objective lens. The illumination optical system is configured to illuminate the eye through the objective lens. The interference optical system includes a reference optical path and a signal optical path which leads to the eye through the deflecting member located between the objective lens and the eye, and is configured to detect interference light based on light having passed through the signal optical path and returning from the eye and the reference light having passed through the reference optical path. The image forming unit forms an image of the eye based on a detection result obtained by the interference optical system.

Ophthalmic surgical apparatus and attachment for ophthalmic surgery

An ophthalmologic imaging apparatus includes: a first optical system that applies an accommodation stimulus to a subject's eye; a tomographic image forming unit that includes a second optical system that splits light from a light source into signal light and reference light, and detects interference light between the signal light having travelled via the subject's eye and the reference light, and creates a tomographic image of the subject's eye based on a detection result of the interference light; and an analyzer that compares a first tomographic image with a second tomographic image to acquire change information indicating a change in a tissue of the subject's eye due to an accommodation stimulus change. The first and second tomographic images are respectively created by the tomographic image forming unit for the subject's eye, to which first and second accommodation stimuli are respectively applied by the first and second optical systems.

Ophthalmologic imaging apparatus for stimulated eye

A coupling lens for coupling first light having a first wavelength from a first light source with a second light having a second wavelength from a second light source disposed adjacent to the first light source in substantially the same direction includes a first surface disposed to face the first and second light sources, the first surface including a first region transmitting the first light and having a first region curvature and a second region transmitting the second light and having a second region curvature, and a second surface opposite to the first surface and having a second-surface curvature. A position of a center of the first region curvature differs from a position of a center of the second region curvature. A center of the second surface curvature and the center of the first region curvature are disposed on an optical axis of the first or second light source.

Coupling lens, illuminating device, and electronic device

An optical scan unit () is configured to include a light source (), a divergent light conversion element () having such positive power as to convert divergent light from the light source () into convergent light to form a spot on a projection plane, an optical deflector () deflecting a light beam from the divergent light conversion element () to a first scan direction and a second scan direction which is orthogonal to the first scan direction, and a deflection angle conversion element() having such negative power as to convert a deflection angle of the light deflected by the optical deflector ().

Optical scan unit, image projector including the same, vehicle head-up display device, and mobile phone

A method for accurate and precise measurement of target proteins such as food allergen proteins in the specific foods is provided. The method is a method for immunological measurement of a food allergen protein in a processed food using an antibody against the food allergen protein, comprising adding animal tropomyosin to an assay solution upon measurement.

Highly sensitive method for detecting protein in food

A lighting device, including a first light source emitting light of a first wavelength; a second light source close to the first source, emitting light of a second wavelength in almost a same direction as that of the first source; a third light source located emitting light of a third wavelength in a direction different from that of the first and second sources; a coupling optical system coupling light from the first and second sources; another coupling optical system coupling light from the third source; and a light path synthesizer synthesizing a light path of light from the first, second and third sources, wherein the light path synthesizer includes a first surface reflecting light from the first source and transmitting light from the second and third sources and a second surface unparallel with the first surface, reflecting light from the second source and transmitting light from the third source.

Lighting device and projection image display unit

An optical pickup apparatus for reproducing information from an optical disk, includes: a semiconductor laser applying a beam to an optical disk having two recording layers through an objective lens; and a light receiving device to which light reflected from the optical disk is directed through the objective lens and a beam splitting device, wherein: the beam splitting device has two first light receiving areas for detecting a push-pull signal and a second light receiving area for detecting a focus error signal, and a configuration is provided such that the center of the optical axis of the reflected light in the beam splitting device is made to lie within the second light receiving area for detecting the focus error signal.

Optical pickup apparatus and optical disk drive apparatus

An illumination optical system projects an illumination light onto an observation object via an objective lens. A first observation optical system guides the illumination light reflected by the observation object to a first ocular lens. A second observation optical system includes a second ocular lens for observing the reflected light of the illumination light. An optical system drive mechanism rotates the second observation optical system and arranges the second observation optical system between a first position and second position facing each other. A reflecting member is disposed at a position retracted from the illumination light path and the reflected light path and reflects the reflected light in a direction different from the optical axis. A drive mechanism rotates the reflecting member around a rotation axis orthogonal to the optical axis and guides the reflected light to the second observation optical system arranged at the first or second position.

Stereomicroscope with repositioning assistant's microscope

A polarizing beam splitter for separating an upstream beam from a downstream beam according to the polarization of an incident beam is provided between first and second light sources emitting laser beams at respective wavelength and an objective lens. A phase plate for providing a phase difference to a beam incident on the polarizing beam splitter is provided between the polarizing beam splitter and the light sources. A portion of the laser beam incident on the polarizing beam splitter is reflected by the polarizing beam splitter and caused to be incident on a photo-detecting unit, so as to prevent an unnecessary portion of the laser beam is incident on the photo-detecting unit. According to the invention, the laser beam is used efficiently and the cost of fabricating an optical disk apparatus is reduced by eliminating a need for a gain controlling circuit in the photo-detecting unit.

Optical disk apparatus compatible with different types of mediums adapted for different wavelengths

A method for adjusting an aberration is disclosed that adjusts the aberration existing in a light spot by using a control signal generated from a wobbling signal and a reproduction signal, and thereby maintaining an appropriate S/N ratio for both the wobbling signal and the reproduction signal even when astigmatism, spherical aberration, or other aberrations are present. In an optical pickup, by moving a collimator lens along a light path, a spherical aberration is generated on the light emitted from a light source, a reproduction signal (RF signal) is obtained from the light reflected from an optical disk, a wobbling signal is obtained from the light reflected from grooves on the optical disk, and the correction aberration is adjusted based on the RF signal and the wobbling signal.

Aberration adjustment device, method thereof, optical pickup, and optical information recording apparatus

A vibration mirror used in an optical scanning device has two reflection surfaces on opposite sides. A pair of light beams corresponding to a pair of different colors are irradiated on one reflection surface and another pair of light beams corresponding to another pair of different colors are irradiated on other reflection surface. If there are fluctuations in dimensions or a change in temperature, because the vibration mirror is one, all the colors are subjected to the same influences.

Optical scanning device and image forming apparatus

Small-sized and light-weighted optical pickup apparatus capable of eliminating the effect due to the flaring light rays and performing the signal detection of high reliability is provided. In the apparatus, the quarter-wave (&#x3bb;/4) plate and the reflection-type birefringent prime provided with the deflecting function of deflecting the reflection light rays reflected on the optical information recording medium and the light rays flux separating function of separating the reflected light rays from the outgoing light rays are disposed in the optical path between the semiconductor laser constructing the optical pickup portion and the objective lens, and the light-receiving element for receiving the reflection light rays from the optical information recording medium which are defleced and separated by the reflection-type birefringent prism is disposed on a single (same) substrate together with the semiconductor laser.

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Kanagawa, Japan

Hiroshi Akiyama