Mitsubishi Heavy Industries Limited

Riken Corporation

Institute for Laser Technology

Nec Corporation

Shingo Nishikata

Hiroyuki Daigo

Koichi Hamamoto

Atsushi Ochiai

Tomoya Morioka

Kazunori Masukawa

Satoshi Wada

Toshikazu Ebisuzaki

Yoshiyuki Takizawa

Masashi Iwashimizu

Hiroki Uchida

Hiroshi Ikebuchi

Yuki Uchiyama

Naoki Inoue

Yoshikatsu Kuroda

Yuichi Araki

Ryuichi Matsuda

Yuichi Otani

Shinji Motokoshi

Masayuki Maruyama

Masahiro Kato

Yoshiyuki Kondo

Shinya Ishii

Atsushi Kodama

Takuya Koyama

Yukito Hata

Yoshiteru Komuro

Hiroshi Arakawa

Takashi Hirano

Ichiro Tsujimoto

Jiro Kasahara

Noriaki Miyanaga

Yoshihiro Sera

Yoshinori Kamiya

Junnosuke Nakatani

Yuki Uchiyma

A phase difference measuring device is provided with a phase conversion device and a detection device. The phase conversion device converts a first laser beam that passes therethrough so that the first laser beam includes a phase distribution of one cycle in an azimuth direction in a cross section of the first laser beam included in an arbitrary virtual plane perpendicular to an optical axis of the first laser beam. The detection device detects an azimuth angle of an intensity centroid of an interference pattern generated by at least a part of a first laser beam that has passed through the phase conversion device, and a part of a second laser beam that derives from a laser beam as seed light from which the first laser beam derives, of which an optical intensity is same as the at least a part of the first laser beam, and detects an inter-beam phase difference of the second laser beam.

Phase difference measuring device, beam output apparatus and phase difference measuring method

A laser irradiation apparatus includes a controller configured to calculate a predicted movement position into which a target is predicted to move at a future specific time, a transmission laser source configured to generate a transmission laser, irradiation optics configured to emit the transmission laser to the target and emit a search laser to the predicted movement position and wavefront correction optics. The wavefront correction optics are configured to correct a wavefront of the transmission laser at the future specific time based on observation light that returns when the search laser is emitted to the predicted movement position.

Laser irradiation apparatus and laser irradiation method

A threat coping system () is provided with a threat coping device () that copes with a coping target () and a control device () that controls the threat coping device. The control device () is provided with a no-coping area setting means () and a coping instruction means (). The no-coping area setting means () sets a no-coping area () based on information of a no-coping target that is not to cope with. The coping instruction means () generates an instruction signal, that instructs the threat coping device to cope a coping target, based on the no-coping area.

Threat coping system

An optical correction is predictively performed based on a result of AI learning previously performed by use of learning data including measurement data. The optical compensation system is provided with wavefront correction optics, a sensor and a controller. The wavefront correction optics corrects a wavefront of light that passes through a given optical path. The sensor obtains environmental information in the optical path. The controller calculates, based on the environmental information, a predicted wavefront disturbance of the light that has passed through the optical path and controls the wavefront correction optics so as to cancel the predicted wavefront disturbance.

Optical compensation system and optical compensation method

An optical system that obtains characteristics of a transmission path in atmosphere, when laser light propagates through this transmission path, at a place separated from this transmission path and before the propagation, and corrects wavefront of the laser light based on the obtained characteristics, is provided. The optical system is provided with an irradiation device and an atmospheric characteristics obtaining system. The irradiation device irradiates an external target with light via a first optical path. The atmospheric characteristics obtaining system is arranged in a second optical path separated from the first optical path and obtains characteristics of atmospheric environment in the first optical path with respect to the irradiated light. The irradiation device is provided with wavefront correction optics. The wavefront correction optics correct wavefront of the irradiated light based on the obtained characteristics.

Optical system and optical compensation method

A laser beam irradiation apparatus including: a plurality of laser light sources emitting first laser beams; and a light-condensing optics system having an incident face on which the first laser beams are made incident and performing an optical operation on the first laser beams to emit second laser beams. The plurality of laser light sources are configured to emit the first laser beams so that beam diameters are expanded towards the incident face. Each first laser beam overlaps at least one of the other laser beams on the incident face. The light-condensing optics system is configured so that beam diameters of second laser beams emitted from the light-condensing optics system are minimal on a target face, and a distance between a center of each second laser beam and the optical axis on the target face is smaller than a beam radius of each second laser beam on the target face.

Laser beam irradiation apparatus and laser beam irradiation system

An underwater acoustic deception system deceives a sensor installed on a threat existing in or on water by acoustic effect in order to protect ships from the threat. The underwater acoustic deception system is provided with a control device, a laser oscillator and emission optical system. The control device determines a focusing position to focus a laser beam () in water in order to generate bubbles () at a desired position with a desired scale and emission parameters of the laser beam (). The laser oscillator generates the laser beam () configured to focus in water and generate bubbles. The emission optical system emits the generated laser beam () to the focusing position. The underwater acoustic deception system deceives an arbitrary sensor existing in the water by acoustic effect of the bubbles () on the surroundings.

Underwater acoustic deception system and underwater acoustic deception method

A laser beam is condensed in a close position to a target object in underwater so as to generate an air bubble or plasma. The target object is efficiently destroyed by a shock by the air bubble or the plasma.

Underwater object destruction system and underwater object destruction method

A driving optical system is used to observe a disturbance of a wavefront of reference light received from a target and generate a wavefront in a conjugate relationship with the wavefront. A plurality of control signals are generated on a basis of a plurality of Zernike coefficients calculated as a Zernike polynomial which approximates the wavefront disturbance in order to respectively drive a plurality of deformable mirrors included in the driving optical system. An adaptive optical system is provided which can optically compensate a wavefront disturbance derived from an atmospheric fluctuation even in a case of radiating laser light to a target moving at a high speed.

Adaptive optical system and adaptive optical method comprising a controller with Zernike coefficients and Zernike polunomial calculation

A solid obstacle is removed with a high-power laser beam to establish a transmission path for a spatial laser communication. When a space in which the laser beam is transmitted is blocked off by the solid obstacle, the spatial laser communication cannot be carried out.

Laser communication system and laser communication method

A method of irradiating an electromagnetic pulse includes specifying a position of a target having electronic equipment; setting the light-condensing point based on the position of the target; and condensing the laser beam to generate plasma in the light-condensing point such that the electromagnetic pulse generated from the plasma is irradiated to the electronic equipment. In this way, a method and system for irradiating an electromagnetic pulse are realized which can irradiate the electromagnetic pulse of a large output while restraining diffusion of the electromagnetic pulse.

Method of irradiating electromagnetic pulse and electromagnetic pulse irradiating system

A laser array device includes a first lens tube () through which a first laser beam () passes, a second lens tube () through which a second laser beam () passes, a support mechanism () disposed to support the first lens tube () and the second lens tube to be parallel to each other, a first lens () arranged in the first lens tube (), and a second lens () arranged in the second lens tube (). A first temperature-rise suppressing mechanism () is disposed in the first lens tube () to suppress temperature rise of the first lens tube ().

Laser array device

An electromagnetic pulse protecting method includes: searching a threatthat generates an electromagnetic pulse; and generating plasmain a light-condensed pointby condensing a laser beamon a light-condensed pointin response to detection of the threat. Thus, various protection objects which contain a protection object having an electric opening indispensably can be protected from an attack by the electromagnetic pulse.

Electromagnetic pulse protection method and electromagnetic pulse protection system

This solid laser amplification device has: a laser medium part that has a solid medium, into which a laser light enters from an entrance part and from which the laser light (L) is emitted to the outside from an exit part, and an amplification layer, which is provided on the surface of the medium, receives the laser light in the medium, and amplifies and reflects said light toward the exit part; a microchannel cooling part that cools the amplification layer; and a thermally conductive part that is provided so as to make contact between the amplification layer and the cooling part and transfers the heat of the amplification layer to the cooling part.

Solid laser amplification device

A solid laser amplification device having a laser medium that has a solid medium, into which a laser light enters and from which the laser light is emitted, and an amplification layer, provided on the surface of the medium, receives the laser light in the medium, and amplifies and reflects the light toward the exit; and a microchannel cooling part that has a plurality of cooling pipelines, into which a cooling solvent is conducted and which are arranged parallel to the surface of the amplification layer, and a cooling surface, at the outer periphery of the cooling pipelines and attached on the surface of the amplification layer, the microchannel cooling part cooling the amplification layer. The closer the position of the cooling pipeline to a position facing a section of the amplification layer that receives the laser light, the greater the cooling force exhibited by the cooling part.

Growing community of inventors

Tokyo, Japan

Shingo Nishikata