Ricoh Company, Ltd.

Ricoh Research Institute of General Electronics Co., Ltd.

Kazuhiko Adachi

Shunichi Sato

Toshihiro Ishii

Satoru Sugawara

Kazuhiro Harasaka

Yoshihiro Ohba

Naoto Jikutani

Takayuki Yamaguchi

Sunao Chubachi

Shuichi Suzuki

Akihiro Itoh

Fumikazu Hoshi

Masafumi Kumano

Yoshihiro Oba

Suguru Sangu

Toshihide Sasaki

Hiroyoshi Shouji

Masayuki Fujiwara

Masaki Hiroi

Yoichiro Takahashi

Yoshihiro Misaka

Shinji Satoh

Yutaka Maita

Shu Tanaka

Tatsuya Shimokawa

Shoichi Akiyama

A light deflection device includes a substrate including a planar portion and a recess; a spacer member disposed at a bottom of the recess; a supporting section disposed on the spacer member; a movable part rotatably supported by the supporting section and having a reflecting surface configured to reflect light at a height equal to or higher than a height of the planar portion; and a light transmissive member disposed on the planar portion and covering the movable part.

Light deflection device, distance measurement device, and mobile body

An optical device includes a light source section configured to emit light; a converging reflector configured to converge and reflect the light from the light source section to an irradiation surface having a curvature; and a position detector configured to detect a light-receptive position of the light reflected from the irradiation surface.

Optical device, retinal projection display, head-mounted display, and optometric apparatus

An atomic oscillator includes a plurality of components, the components including a light source that emits excitation light, a gas cell in which an atom to be excited by the excitation light is sealed, and a photodetector that detects the excitation light transmitting through the gas cell; and a main part, wherein a part of the plurality of components are laminated in the main part. In a first component and a second component adjacent to each other of the main part, an electrically conductive film is formed on each of side surfaces of the first component and the second component; bonding patterns that are extended from the respective electrically conductive films and that face each other are formed on respective bonding surfaces facing each other of the first component and the second component; and the bonding patterns that face each other are bonded by a bonding material.

Atomic oscillator and method for manufacturing atomic oscillator

An optical sensor, an optical examination device, and a method of detecting optical properties. The optical sensor includes an irradiation system including light irradiator to irradiate a test object with light, and a detection system to detect the light that is emitted from the irradiation system to the test object and has propagated through the test object. The light irradiator includes a multilayered structure having an active layer, and the multilayered structure includes a surface-emitting laser element and a photo-sensing element optically connected to the surface-emitting laser element. The optical examination device includes the optical sensor, and a controller to calculate optical properties of the test object based on a detection result of the optical sensor. The method includes performing optical simulation to obtain a detection light quantity distribution for an optical model and performing inverse problem estimation.

Optical sensor, optical examination device, and optical property detection method

A surface-emitting laser apparatus includes a surface-emitting laser substrate; a microlens substrate; and an adhesion agent. The surface-emitting laser substrate includes a semiconductor substrate; and a surface-emitting laser and plural first adhesion fixing regions formed on a first face of the semiconductor substrate. The microlens substrate includes a microlens configured to receive light emitted by the surface-emitting laser; plural pier portions protruding toward a side of the first face of the semiconductor substrate; and plural second adhesion fixing regions, formed at positions corresponding to the first adhesion fixing regions on surfaces of the pier portions. The adhesive agent causes the first adhesion fixing regions and the second adhesion fixing regions to adhere to each other. A restoring force acts on the adhesive agent in a case where the adhesive agent is melted. The surface-emitting laser substrate and the microlens substrate are self-aligned with each other according to the restoring force.

Surface-emitting laser apparatus and manufacturing method thereof

An optical device includes a semiconductor element configured to emit emission light or to receive incident light, including a first fitting part including a portion having a convex shape in a first region; an optical member arranged on an optical path of the emission light emitted from the semiconductor element or the incident light entering the semiconductor element, including a second fitting part fitted to at least a part of the portion having the convex shape, the first region being opposed to the optical member; and a joint part that joins the semiconductor element and the optical member, arranged between the first fitting part and the second fitting part.

Optical device and light irradiation apparatus

A disclosed surface-emitting laser module includes a surface-emitting laser formed on a substrate to emit light perpendicular to its surface, a package including a recess portion in which the substrate having the surface-emitting laser is arranged, and a transparent substrate arranged to cover the recess portion of the package and the substrate having the surface-emitting laser such that the transparent substrate and the package are connected on a light emitting side of the surface-emitting laser. In the surface-emitting laser module, a high reflectance region and a low reflectance region are formed within a region enclosed by an electrode on an upper part of a mesa of the surface-emitting laser, and the transparent substrate is slanted to the surface of the substrate having the surface-emitting laser in a polarization direction of the light emitted from the surface-emitting laser determined by the high reflectance region and the low reflectance region.

Surface-emitting laser module, optical scanner device, and image forming apparatus

A sensor apparatus includes an irradiation system with a light source configured to emit linearly polarized light of a first polarization direction onto a sheet-like object, in a direction oblique to a direction orthogonal to a surface of the object, a first photodetector arranged on an optical path of light that is emitted from the irradiation system and then is reflected at the object by regular reflection, a first optical element, arranged on an optical path of light reflected by diffuse reflection from an incidence plane of the object, configured to transmit linearly polarized light of a second polarization direction that is orthogonal to the first polarization direction, a second photodetector configured to receive light that has passed through the first optical element, and a detection unit configured to detect at least one of basis weight and thickness of the object.

Sensor apparatus and image forming apparatus incorporating same

An alkali metal cell is disclosed, including a substrate in which is formed an opening which penetrates from one face to the other face thereof; a first transparent substrate bonded to the other face of the substrate; and a second transparent substrate bonded to the one face of the substrate, wherein an alkali metal is sealed into a space surrounded by the first transparent substrate and the second transparent substrate in the opening of the substrate, wherein, in the substrate and the second transparent substrate, the space is enclosed by a bonding between a first bonding metal layer formed by a first bonding metal and a second bonding metal layer formed by a second bonding metal, and wherein the second bonding metal layer has a bonding temperature higher than that of the first bonding metal layer.

Alkali metal cell, atomic oscillator, and alkali metal cell fabricating method

A heater substrate for heating an alkali metal cell including an alkali metal includes a first heater wiring formed in a region surrounding an alkali metal encapsulating part in which the alkali metal is encapsulated; a second heater wiring formed in the region surrounding the alkali metal encapsulating part and inside the first heater wiring; and a third heater wiring formed outside the first heater wiring. A first electric current flowing in the first heater wiring is divided into a second electric current flowing in the second heater wiring and a third electric current flowing in the third heater wiring. A direction of the first electric current is opposite to a direction of the second electric current and a direction of the third electric current.

Heater substrate, alkali metal cell unit and atomic oscillator

An optical device includes a surface-emitting laser array having a plurality of light-emitting portions; a package member on which the surface-emitting laser array is disposed; and a transparent member retained on the package member and disposed on an optical path of a light beam emitted by the surface-emitting laser array. The transparent member includes an incident plane on which the light beam emitted by the surface-emitting laser array is incident. The incident plane is inclined with respect to an emitting surface of the surface-emitting laser array at a first inclination angle which is smaller than a second inclination angle at which the light emitted by one of the light-emitting portions is incident on another, most-distant one, of the light-emitting portions via reflection by the transparent member.

Optical device capable of minimizing output variation due to feedback light, optical scanning apparatus, and image forming apparatus

Disclosed is a surface emitting laser module including a surface emitting laser element formed in a semiconductor substrate and having a surface emitting laser array that emits light in a direction perpendicular to a surface of the semiconductor substrate; a package having a region in which the semiconductor substrate is provided; and a metal cap having a cylindrical part formed of metal, the cylindrical part having a transparent substrate on one side thereof and a bottom part on the other side thereof bonded to the package. The transparent substrate is provided in the metal cap in such a manner as to be inclined with respect to the semiconductor substrate, the package has a metal part at a bonding part thereof bonded to the metal cap, and the metal part and the metal cap are bonded together by welding.

Surface emitting laser module, optical scanner, and image forming apparatus

An optical device including an optical element; a package member in which the optical element is held on a bottom surface of the package member in an area surrounded by walls; and a plate member that seals the area surrounded by the walls and the bottom surface in an airtight manner, the plate member being translucent and joined to the package member with a resin material. The walls have a structure including steps, the plate member is joined onto one of the steps of the walls, and at least a part of the walls facing side surfaces of the plate member includes a positioning part for positioning the plate member and a retaining part for retaining the resin material, in a direction perpendicular to the bottom surface.

Growing community of inventors

Miyagi, Japan

Kazuhiko Adachi