Ricoh Company, Ltd.

Other

Kabushiki Kaisha Toshiba

Telcordia Technologies, Inc.

Yoshihiro Ohba

Satoru Sugawara

Toshihiro Ishii

Shunichi Sato

David Famolari

Ashutosh Dutta

Subir Das

Fumikazu Hoshi

Kazuhiro Harasaka

Kazuhiko Adachi

Mitsuru Kanda

Victor Fajardo

Raquel Morera

Yoshimitsu Shimojo

Kenichi Taniuchi

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

In an optical sensor, a light emission system emits an irradiated light of a linear polarization in a first polarization direction toward a surface of a target object having a sheet shape from an incident direction which is inclined with respect to a normal direction of the surface. A first light detection system includes a first light detector arranged on a first light path of a specular reflected light, which is emitted from the light emission system and is specularly reflected from the target object. A second light detection system includes a second light detector arranged on a second light path of a diffuse reflected light which is diffusely reflected from an incident plane on the target object. The second light detector receives second light passed by an optical element which passes a linear polarization component of a second polarization direction perpendicular to the first polarization direction.

Optical sensor and image forming apparatus

An optical sensor includes a light source to illuminate a linear polarization in a first direction, a first optical detector disposed on a path of a light illuminated from the light source and specularly reflected by an object, a first optical element to separate the light reflected by the object into a linear polarization in the first direction and a linear polarization in a second direction orthogonal to the first direction, a second optical detector to receive the linear polarization in the second direction separated by the first optical element, and a processor to obtain an amount of the light specularly reflected by the object on the basis of an output signal of the first optical detector and an output signal of the second optical detector.

Optical sensor and image forming device incorporating the same

An optical sensor includes an irradiation system including a semiconductor laser having plural light-emitting parts; and at least one photodetector that detects an amount of light which is emitted from the irradiation system and reflected on a sheet-like object.

Optical sensor and image forming apparatus configured to detect light reflected from sheet

A sensor is configured to include an optical sensor including a light source and a plurality of light receivers which receive light emitted from the light source and light regularly reflected and diffusely reflected by an object, a database including output data regarding multiple objects of known and different types from the plurality of light receivers when an incident direction of light emitted from the light source forms a first direction to the object and when the incident direction of light emitted from the light source forms a second direction which is orthogonal to the first direction, and a processor which controls the light emitted from the light source to illuminate an object of unknown type and specifies the type of the object by matching the output data of the plurality of light receivers to the database.

Sensor and image-forming apparatus

A light source unit includes a surface-emitting laser array including light emitting units; and an apertured member provided on a light path of light beams emitted from the surface-emitting laser array, the apertured member including an aperture. In at least one direction, an intensity distribution of interference patterns caused by the light beams passing through the aperture includes an equal number of crests and troughs.

Light source unit, optical scanning device, and image forming apparatus

A packet transfer scheme that applies markings at different levels to packets while they are transferred from their source to destination, in which a marking information at one level will not be lost by a marking at another level is disclosed. A node device receives packets each having a plurality of regions into which priority information can be written, and then transmits each received packet to a next hop node by writing the priority information according to criteria of the own node into one region into which the own node is allowed to write the priority information among the plurality of regions contained in each packet, while maintaining the priority information in other regions as received.

Node device and packet transfer method using priority in plural hierarchical levels

A packet scheduling scheme which is capable of improving the fairness characteristic in a short time scale by suppressing the burstiness of traffic compared with the conventional weight fair queueing algorithm such as DRR. Packets are held in a plurality of packet queues by inputting arrived packets into the packet queues. Then, an output packet queue is sequentially selected from the packet queues, according to a prescribed criterion based on an amount of packets currently transmittable by each packet queue, such that the output packet queue is selected to be different from a previously selected output packet queue when there are more than one packet queues that satisfy the prescribed criterion. Then, a top packet is outputted from the sequentially selected output packet queue.

Growing community of inventors

Miyagi, Japan

Yoshihiro Ohba