Mitsubishi Heavy Industries Limited

Riken Corporation

Institute for Laser Technology

Masashi Iwashimizu

Satoshi Wada

Shingo Nishikata

Atsushi Ochiai

Kazunori Masukawa

Hiroyuki Daigo

Toshikazu Ebisuzaki

Yoshiyuki Takizawa

Shinji Motokoshi

Masayuki Maruyama

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

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

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.

Growing community of inventors

Tokyo, Japan

Masashi Iwashimizu