Ricoh Company, Ltd.

Nippon Telegraph and Telephone Corporation

Riken Corporation

Other

Hitachi, Ltd.

Hitachi Cable, Inc.

Ntt Electronics Corporation

Yasufumi Yamada

Kuniharu Kato

Masahiro Yanagisawa

Toshikazu Hashimoto

Hiroshi Kumagai

Hiroshi Terui

Katsumi Midorikawa

Akio Sugita

Manabu Seo

Shinji Mino

Ikuo Ogawa

Kazuyuki Moriwaki

Kaoru Yoshino

Tadashi Nakamura

Atsushi Sakai

Naoto Jikutani

Shuichi Suzuki

Koichi Kudo

Yoshihiro Norikane

Yasuyuki Inoue

Tsuyoshi Ueno

Masao Kawachi

Nobunari Tsukamoto

Kazuma Izumiya

Mitsuho Yasu

Morio Kobayashi

Satoshi Aoki

Nobuyuki Satoh

Shin Aoki

Kenji Yokoyama

Mitsuru Takahashi

Hideaki Hirai

Hisato Uetsuka

Satoru Tomaru

Saburo Imamura

Nobuhiro Morita

Masayuki Okuno

Masahiro Fujimoto

Taisuke Oguchi

Tatsuo Teraoka

Hirotsugu Sato

Michiyuki Amano

Toshiyuki Ikeoh

Yasuaki Tamura

Takao Kimura

Hiroaki Okano

Makoto Hikita

Shigeru Oohchida

Haruki Kozawaguchi

Fumiaki Hanawa

Yoshito Shuto

Takuroh Kamiya

Mikio Kamoshita

Yasunori Iwafuji

Ryoko Yoshimura

Tatsuo Izawa

Keiichi Higuchi

Hiroaki Kotera

Masayuki Yanagihashi

Shunichi Tono

Tetsuo Yoshizawa

Toru Maruno

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 distance measuring apparatus includes a light source to emit light beams, an optical scanner to scan the light beams output from the light source over a predetermined range, a light receiver to receive reflected light obtained as a result of the light beams being reflected by a target object, and to output detection signals, and a control circuit to measure a distance to the target object based on the detection signals. The light source including a plurality of light-emitting device groups that are arranged in a scan direction of a scan performed by the optical scanner, and the control circuit being to make the plurality of light-emitting device groups emit light at respective different timings in a single scan, and to measure the distance to the target object based on a sum of the detection signals.

Distance measuring apparatus and mobile body including the same

An imaging device includes: a filter formed of four different filter regions with four different spectral transmittances that three different spectral transmittances having characteristics of a color matching function and a spectral transmittance for extracting metallic black have been linearly transformed thereinto by a linear transformation matrix; and an imaging unit that takes an image of light which has come out from a subject, and has been collected by an optical system, and then has passed through the filter.

Imaging device, imaging system, and imaging method

A stereo camera apparatus includes a first image capturing unit having first and second lens units, a first light synthesis unit, a first area-divided filter, and a first image capturing element. The first light synthesis unit and the first area-divided filter guide S-polarized and P-polarized light components to the first image capturing element. The second image capturing unit includes third and fourth lens units, a second light synthesis unit, a second area-divided filter, and a second image capturing element. The second light synthesis unit and the second area-divided filter guide S-polarized and P-polarized light components to the second image capturing element. The control unit includes first and second controllers to compute three-dimensional data of object using the S-polarized and P-polarized light component images, respectively.

Stereo camera apparatus and vehicle-mountable monitoring apparatus using same

An apparatus for processing a three-dimensional structure having a fine three-dimensional shape and a smooth surface is disclosed in which the three-dimensional structure is usable for an optical device. The process method includes depositing a thin layer for absorption of laser light on a flat substrate; depositing a transparent layer on the thin layer for absorption of laser light; and irradiating a process laser light, passing through the transparent layer; in which pulse injection energy of the process laser light is set to be the same as or smaller than the maximum pulse injection energy capable of exposing a surface of the thin layer in front in the incident direction of the process laser light, and to be set the same as or greater than the minimum pulse injection energy capable of removing the transparent layer in rear in the incident direction of the process laser light.

Method and apparatus for processing three-dimensional structure, method for producing three-dimensional shape product and three-dimensional structure

A laser processing apparatus includes a laser source (), a spatial phase modulator () configured to modulate a phase of a laser beam emitted from the laser source, a synthetic data generator () configured to generate synthetic data by combining hologram image data representing a pattern image to be processed with position displacement hologram data for shifting the pattern image to a prescribed position, the synthetic data being input to the spatial phase modulator for the phase modulation of the laser beams, and a focusing optical unit () configured to guide the phase-modulated laser beam onto a surface to be processed to reproduce the pattern image on the processed surface.

Laser processing apparatus using distinct horizontal and vertical data sets

A plurality of configurations is simultaneously formed in a material by a single laser beam having a desired distribution pattern of wavelengths. An input laser beam has an initial wavelength distribution pattern. The initial wavelength distribution pattern is adjusted or modified into a desired final wavelength distribution pattern. For example, the initial wavelength distribution pattern is a wide range of wavelengths in a single bell-curve distribution while the desired final wavelength distribution pattern has a specific number of sharp peaks each over a predetermined narrow range. The laser beam having the desired final wavelength distribution pattern is focused upon on a material. Because of the multiple peaks in the wavelength distribution, the laser beam is focused at a plurality of the focal distances. A number of structures is simultaneously formed in a material at the multiple focal points or at multiple locations/depths when the above laser beam is projected onto the material.

Method and device for adjusting wavelength distribution pattern in laser

A laser processing method where laser beam for processing is irradiated on a processing object and the laser beam for processing directly removes a part of the processing object. The processing object is made of a glass substrate, metal thin film having high absorption to laser beam for processing is formed on a surface of glass substrate, into which laser beam for processing is made incident, the laser beam for processing is irradiated from a surface of metal thin film, and matter is directly removed by irradiation of laser beam onto the processing object in order to form a region finer than an irradiation region of laser beam for processing on the processing object.

Method for processing by laser, apparatus for processing by laser, and three-dimensional structure

A mark forming method for a moving body is disclosed. The method includes the steps of forming a second material layer, which scatters second wavelength light by being dispersed a first material that has a light absorbing property for first wavelength light therein, on a moving body; irradiating the first wavelength light on a part of the second material layer, making the first material at the part absorb the first wavelength light, and changing a scattering property of the part of the second material layer; and forming a mark whose scattering property for the second wavelength light is different in the part.

Mark forming method for moving body and moving body having mark

A laser-working method is disclosed, which includes the steps of splitting a single pulse laser beam having a time width of not more than 500 picoseconds into plural pulse laser beams; subjecting said plural pulse laser beams to time delaying, and adjusting a working surface-irradiating shape, an intensity distribution and a working surface-irradiating position of each of the plural pulse laser beams; working a target object to be irradiated, while the respective working surface-irradiating shapes of said plural laser beams are partially or entirely spatially overlapped with each other or one another; and setting to a time interval of from a pulse width to 1 nanosecond a time period during which each of the pulse laser beams is irradiated.

Ultrashort-pulse laser-working method and apparatus and structural bodies produced by using the same

Disclosed is a method for processing a three-dimensional structure having a fine three-dimensional shape and a smooth surface is disclosed in which the three-dimensional structure is usable for an optical device. The process method comprises the steps of depositing a thin layer for absorption of laser light on a flat substrate; depositing a transparent layer on the thin layer for absorption of laser light; and irradiating a process laser light, passing through the transparent layer; in which pulse injection energy of the process laser light is set to be the same as or smaller than the maximum pulse injection energy capable of exposing a surface of the thin layer in front in the incident direction of the process laser light, and to be set the same as or greater than the minimum pulse injection energy capable of removing the transparent layer in rear in the incident direction of the process laser light.

A laser processing method capable of performing fine and highly accurate processing by low energy is obtained. The invention relates to the laser processing method where laser beam for processing () is irradiated on a processing object () and the laser beam for processing () directly removes a part of the processing object (). The processing object () is made of a glass substrate, metal thin film () having high absorption to laser beam for processing () is formed on a surface of glass substrate, into which laser beam for processing () is made incident, the laser beam for processing () is irradiated from a surface of metal thin film (), and matter is directly removed by irradiation of laser beam onto the processing object () in order to form a region finer than an irradiation region of laser beam for processing () on the processing object ().

Method for processing a three-dimensional structure by laser

An optical multiplexing/demultiplexing apparatus in which a plurality of optical multiplexing/demultiplexing units operating in different wavelength bands are connected hierarchically. Each of the plurality of optical multiplexing/demultiplexing units includes an input waveguide for receiving wavelength multiplexed optical waves, a filter for separating the wavelength multiplexed optical wave from the input waveguide into a first optical wave in a corresponding operating wavelength band and a second optical wave in the other wavelength bands. Each of the multiplexing/demultiplexing units also includes an AWG optical multiplexer/demultiplexer for separating the first optical wave from the filter into individual optical waves each of a single wavelength, and a branch waveguide for directing the second optical waves from the filter to an input waveguide of a succeeding optical multiplexing/demultiplexing unit.

Wavelength multiplexing/demultiplexing unit, wavelength multiplexing/demultiplexing apparatus and wavelength multiplexing/demultiplexing method

An image forming apparatus including a drum, an optical scanning mechanism, a development mechanism, an intermediate transfer member, movement detecting mechanisms, and a controller. The intermediate transfer member is rotated in synchronism with a rotation of the drum and receives color toner image multiple times to form thereon a composite color toner image including multiple images of different color toners overlaying one to another. The movement detecting mechanisms detect respective movements of the drum and the intermediate transfer member. The controller controls respective rotations of the drum and the intermediate transfer member with results of respective detection performed by the movement detecting mechanisms.

Method and apparatus for color image forming capable of performing a precise synchronization between toner image forming per color and its overlaying

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Yokohama, Japan

Yasufumi Yamada