Ricoh Company, Ltd.

Phluxi, Inc.

Toshiyuki Ikeoh

Naoto Jikutani

Yasuhiro Higashi

Kentaroh Hagita

Atsushi Sakai

Kazuma Izumiya

Takumi Satoh

Yoshio Wada

Tadashi Nakamura

Shuichi Suzuki

Kazuhiro Yoneda

Tsuyoshi Ueno

Yasufumi Yamada

Nobunari Tsukamoto

Hiroaki Minamide

Yusuke Ohta

Yoshihiko Miki

Naoki Fukuoka

Masayuki Numata

Kouji Nawata

Kenichi Hayakawa

Toshiya Yamaguchi

Yoichi Ishikawa

Yusuke Okura

Yuzuru Sasaki

Yoshiharu Urata

Yuma Takida

An optical device includes a light source provided with a plurality of surface-emitting laser elements to emit a laser beam, a scanner to scan the laser beam emitted from the light source, and an optical system disposed in an optical path between the light source and the scanner and to guide the laser beam to the scanner. The optical system includes a first optical element to control a divergence angle of the laser beam emitted from the light source and a second optical element to concentrate the laser beam that has passed through the first optical element onto a to-be-scanned surface of the scanner.

Optical device, range sensor using optical device, and mobile object

A light deflector, a method of manufacturing the light deflector, and an image projector. The light deflector and the method includes forming a first wafer provided with a plurality of movable mirror units, bonding the first wafer to be sandwiched between a second wafer on which a plurality of base units are formed and a third wafer on which a plurality of spacers are formed, bonding a fourth wafer on which a plurality of transparent members are formed on the third wafer, bonding a plurality of polyhedron light-beam adjusters on the fourth wafer such that one of the plurality of polyhedron light-beam adjusters and the movable mirror unit become a pair, and cutting a wafer layered product of the first to fourth wafers for each area in which the light deflector is formed. The image projector includes the light deflector, and an image is projected by optical scanning.

Light deflector and its manufacturing method, image projector, object recognition device, laser headlamp device, optical writing device, and mobile object

An optical device includes: a substrate having a first surface, and a second surface opposite of the first surface; a plurality of surface emitting laser elements provided on the first surface of the substrate and configured to emit light in a direction intersecting the first surface; a plurality of optical elements disposed on the second surface so as to respectively correspond to the plurality of surface emitting laser elements; and an anti-reflection structure between the substrate and the plurality of optical elements.

Optical device, lighting apparatus, measuring apparatus, part-inspecting apparatus, robot, electronic device, and movable object

An optical device according to an embodiment of the present disclosure includes a light source in which a plurality of light emitting elements are arranged at a predetermined distance, an optical system configured to convert light beams from the plurality of light emitting elements into line light beams, and a light deflection element configured to deflect each of the line light beams. Each of the line light beams is caused to be incident on the light deflection element such that a longitudinal direction of each of the light beams is aligned with a direction of a rotating axis of the light deflection element.

Optical device, measurement device, robot, electronic apparatus, mobile object, and shaping device

Laser devices include a light source that emits a laser beam, an optical system that concentrates the laser beam emitted from the light source, an optical window through which the laser beam exited from the optical system passes, a housing that accommodates the optical system, and an optical window holding member fixed to the housing. The optical window holding member holds the optical window. In the first laser device, the optical window has a face or a protruding face through which the laser beam passes. When the optical window has the face, the face is flush with an edge of the optical window holding member and a film is formed on the face. When the optical window has the protruding face, the protruding face protrudes with reference to the edge of the optical window holding member and a film is formed on the protruding face.

Laser device and internal combustion engine

An ignition device configured to ignite a fuel included in an air-fuel mixture supplied to a main combustion chamber of an internal combustion engine. The ignition device includes a partition member that forms a precombustion chamber that encloses an ignition point of a fuel. The partition member has a plurality of communicating holes communicating between the main combustion chamber and the precombustion chamber. The ignition device further includes a first interference member that protrudes inward from an inner surface of the partition member.

Ignition device and internal combustion engine

A pulsed electromagnetic-wave generator includes an excitation light source, a laser resonator, a pulse generating unit, and a wavelength converting unit. Excitation light from the excitation light source enters the laser resonator. The pulse generating unit is configured to generate a pulsed light group including at least two or more pulses with different frequencies (&#x3c9;) and different oscillation timings (t) in one excitation process of the excitation light source, an oscillation frequency difference (&#x394;&#x3c9;) between the pulses in the pulsed light group being an integral multiple of a Free Spectral Range (FSR) of the laser resonator. The pulsed light group enters the wavelength converting unit. The wavelength converting unit is configured to generate a pulsed electromagnetic wave in which a wavelength of each pulse in the pulsed light group is converted.

Pulsed electromagnetic-wave generator and measuring apparatus

A laser device includes a light source device including a semiconductor laser; and a laser cavity irradiated with light from the light source device and including a saturable absorber. A beam waist diameter r of the light that irradiates the laser cavity and an initial transmittance Tof the saturable absorber satisfy a relationship of 7.75&#xd7;T&#x2212;7.77&#xd7;T+3.13&#xd7;T+0.16&#xd7;T+0.74&#x2264;r&#x2264;2.62&#xd7;T+0.675.

Laser device, ignition device, and internal combustion engine

A terahertz wave generation apparatus includes a plurality of laser light sources configured to generate laser beams respectively having different wavelengths; and a terahertz wave generating element configured to receive the laser beams having different wavelengths and generate a terahertz wave from the laser beams. The plurality of laser light sources include fiber laser light sources respectively including parameters that can be controlled independently, and the terahertz wave generating element includes a nonlinear optical crystal.

Terahertz wave generation apparatus and inspection apparatus

Growing community of inventors

Miyagi, Japan

Toshiyuki Ikeoh