Ricoh Company, Ltd.

Honda Motor Co., Ltd.

Masayuki Numata

Naoto Jikutani

Kazuma Izumiya

Shunichi Sato

Tsuyoshi Ueno

Nobuyuki Arai

Yasuhiro Higashi

Katsunari Hanaoka

Hiroyoshi Shouji

Kiyoshi Shibata

Toshiyuki Ikeoh

Tsuyoshi Suzudo

Kentaroh Hagita

Akihiro Ikegami

A surface-emitting laser array includes a plurality of light emitting parts. Each light emitting part includes a reflection mirror including aluminum gallium arsenide (AlGaAs) where x is greater than 0.95 but less than or equal to 1; an active layer; and an electrode surrounding an emission region, from which laser light is emitted, the electrode covering a region between adjacent light emitting parts in the plurality of light emitting parts.

Surface-emitting laser array, laser apparatus, ignition device and internal combustion engine

A laser device is provided including a surface emitting laser array configured to emit light, an optical system disposed in an optical path of light that is emitted from the surface emitting laser, a laser resonator which the light passed through the optical system enters, where the optical system includes a first optical element configured to collimate the light emitted from the surface emitting laser, and a second optical element configured to collect and condense the light collimated by the first optical element.

Laser device, ignition system, and internal combustion engine

Disclosed is a cast pin equipped with circular grooves which are provided at any location. The cast pin () is equipped with: an outer tube () in the shape of a hollow body the tip of which is closed; an inner tube () inserted into the outer tube (); and a cooling medium pipe () that is inserted into the inner tube () and supplies a cooling medium to the interior of the inner tube (). Three circular grooves () are formed at prescribed intervals in the longitudinal direction, for example, on the outer circumferential surface () of the inner tube (). The circular grooves () are formed in the outer circumferential surface () by applying a cutting tool from the radial outward direction of the inner tube ().

Core pin for casting

A surface emitting laser array element is disclosed that includes a lower distributed bragg reflector (DBR) that is formed on a substrate, an active layer that is formed on the lower DBR, and an upper DBR that is formed on the active layer. A mesa and a dummy mesa that is arranged at a periphery of the mesa are created by removing a portion of the upper DBR. The mesa forms a surface emitting laser, and a wiring is connected to an electrode that is formed on an upper face of the mesa. The wiring includes a portion that is arranged over an upper face of the dummy mesa, a side face of the dummy mesa, and a bottom face at a peripheral region of the dummy mesa extending along a longitudinal direction of the wiring.

Surface emitting laser array element, optical scanning device, and image forming apparatus

A surface emitting laser device includes a substrate and plural semiconductor layers laminated on the substrate, the plural semiconductor layers including a first semiconductor multi-layer film including aluminum (Al), an active layer, and a second semiconductor multi-layer film, a light emitting section having a mesa structure being formed on the first semiconductor multi-layer film. When viewed in a direction orthogonal to a surface of the substrate, an outer shape of the first semiconductor multi-layer film is a macroscopically smooth shape without an angular corner, and a side surface of the first semiconductor multi-layer film is coated with a passivation film and a protection film.

Surface emitting laser device, surface emitting laser array, optical scanning device, image forming apparatus, and method of manufacturing the surface emitting laser device

Growing community of inventors

Kanagawa, Japan

Masayuki Numata