Ricoh Company, Ltd.

Rioch Company, Limited

Kohji Sakai

Takashi Fujita

Seizo Suzuki

Magane Aoki

Yoshinori Hayashi

Hiromichi Atsuumi

Tadashi Nakamura

Takeshi Ueda

Daisuke Ichii

Kenichiroh Saisho

Naoto Watanabe

Toshiaki Tokita

Nobuaki Kubo

Kazuhiro Akatsu

Akihisa Itabashi

Masataka Uehira

Tomohiro Nakajima

Hiroyuki Suhara

Miho Higuchi

Jun Watanabe

Atsushi Kawamura

Shigeaki Imai

Masayuki Muranaka

Kenichiro Saisho

Yoshinori Hayoshi

Hiroaki Tanaka

Atsushi Takeuchi

Atsufumi Omori

Naoki Miyatake

Tomoyasu Hirasawa

Tomomi Ishimi

Mitsuo Suzuki

Yukio Itami

Kenichi Takanashi

Toshishige Fujii

Shohta Kobashigawa

Tomoya Ohsugi

Kohei Ushio

Asato Tamura

Yuuta Yoshino

Yorichika Ishiyama

Takuei Nishio

Ichiro Maeda

Maga Aoki

An apparatus configured to fly a light-absorbing material, includes a unit configured to irradiate a light-absorbing material absorbing light with a laser beam corresponding to a light absorption wavelength of the light-absorbing material to fly the light-absorbing material. When a preceding beam radiation region and a following beam radiation region overlap, the following beam radiation region is irradiated with the laser beam such that a beam centroid position is outside the preceding beam radiation region.

Apparatus configured to fly light-absorbing material, apparatus configured to model three-dimensional modeled object, and method of flying light-absorbing material

First and second types of object detectors, a sensing device, and a mobile apparatus. The first and second types of object detectors include a light source configured to emit light, photoreceptor configured to receive the light reflected by an object, and a binarizing circuit configured to binarize a signal sent from the photoreceptor at a threshold V. In the first and second types of object detectors, object detection processes are performed in a same direction until a high-level signal is output M times from the signal binarized by the binarizing circuit. In the first type of object detector, a value of the M is determined based on an incidence of shot noise where peak intensity exceeds the threshold Vin the photoreceptor. In the second type of object detector, a threshold Vis set based on a value of the M.

Object detector, sensing device, and mobile object apparatus

A semiconductor laser is for generating colored light. The semiconductor laser oscillates in a longitudinal multimode. A width of a wavelength band with an intensity equal to or more than &#x2212;20 dB relative to a peak intensity in a spectrum distribution of output light is equal to or less than 15 nm. A light source device may include The semiconductor laser; a wavelength estimating device configured to estimate a wavelength &#x3bb; of light from the semiconductor laser; and an emission-light intensity setting unit configured to set an emission light intensity of the semiconductor laser in accordance with an estimation result by the wavelength estimating device.

Semiconductor laser, light source device, image forming apparatus, image display device, object device, and colored-light generation method

An object detector includes a projector including a light source having a two-dimensionally arranged plurality of light emitter groups, each of the light emitter groups having a plurality of light emitters, a light receiver which receives light emitted from the projector, and reflected by an object, and a light source driver which lights on and lights off each of the light emitter groups of the light source.

Object detector and sensor

A microlens array includes N lenses ranging from a 1lens to an Nlens and a lens arrangement area. N is a positive integer. The lens arrangement area has the N lenses arranged in array. The lens arrangement area receives light emitted from a light source. An i(i being 1to N) lens satisfies a conditional expression below:&#x2212;20&#xb0;&#x2264;&#x3b8;&#x2264;20&#xb0;

Microlens array, image display apparatus, object apparatus, and mold

An object detecting apparatus includes: a light projection unit that is an array light source in which each of a plurality of light emission areas emits light, an optical scanning unit that performs scanning with the light, which is emitted from the light projection unit, in a first direction, and a light receiving unit that receives reflected light which is the light, with which the scanning is performed, being reflected by an object, and an object information acquiring unit that detects presence/absence of the object based on emission timing at which the light is emitted from the light projection unit and light receiving timing at which the light receiving unit receives the reflected light.

Object detecting apparatus

A light-source device including a light-emitting element to emit light, a light-receiving system, an acquisition unit, a setting unit, and an adjuster. The light-receiving system receives the light emitted from the light emitting element. The acquisition unit acquires a wavelength of the light emitted from the light emitting element. The setting unit sets a target value of an amount of the light received by the light-receiving system based on the wavelength acquired by the acquisition unit. The adjuster adjusts an amount of the light emitted from the light emitting element such that the amount of the light reaches the target value of the light that is set with the setting unit.

Light-source device, image display apparatus, and object apparatus

A wavelength estimation device including a light detector to receive light emitted from a light source and an estimation unit. The estimation unit estimates a wavelength of the light based on an amount of light received by the light detector.

Wavelength estimation device, light-source device, image display apparatus, object apparatus, wavelength estimation method, and light-source control method

A semiconductor laser driving apparatus for driving a semiconductor laser serving as a light source for optical scanning, the semiconductor laser driving apparatus includes: first and second switching elements that are each capable of switching energization of the semiconductor laser ON/OFF; a first pulse generation unit that intermittently outputs first driving pulses to the first switching element in a first time slot; and a second pulse generation unit that outputs a second driving pulse to the second switching element in a second time slot different from the first time slot.

Semiconductor laser driving apparatus, optical scanning apparatus, object detection apparatus, and mobile apparatus

A range finder which irradiates a subject by emission of a light source, and receives reflected light from the subject so as to measure a distance to the subject, the range finder includes a plurality of light-source-driving circuits supplying a driving current to the light source when a light-emitting signal that controls the emission of the light source is input, wherein the light-emitting signal is output to one of the light-source-driving circuits, and each of the light-source-driving circuits has a different response speed to the light-emitting signal.

Range finder, mobile object and range-finding method

A light irradiation apparatus includes an irradiation unit including a light source to emit light to a process-target object, a light source driving circuit to drive the light source, a light source controller to control the light source driving circuit to change a light output level of the light source, and a light spot controller to control energy or energy density of a beam spot of the light on the process-target object depending on an operation mode, and a transition mode that one operation mode is being changed to another mode. The light spot controller sets the energy or energy density during the transition mode lower compared to either of the energy or energy density during the one operation mode before the transition mode and the energy or energy density during the another mode after the transition mode.

Light irradiation apparatus and information rewritable system

An object detector is provided including a light emitter including at least a light source having a plurality of light emitting areas disposed along a first direction to emit light, an optical scanner configured to scan the light emitted from the light emitter along a second direction that is different from the first direction, a light receiver configured to receive the light that is scanned by the optical scanner and then is reflected at an object, and a controller configured to divide a detection field into a plurality of subareas in a third direction that is orthogonal to the second direction, where a number of partitions of the detection field is variable.

Object detector and sensing apparatus

Growing community of inventors

Tokyo, Japan

Kohji Sakai