Panasonic Intellectual Property Management Co., Ltd.

Ryo Ishikawa

Hideaki Yamaguchi

Doukei Nagayasu

Kiyotaka Eizumi

Makoto Ryudo

Hitoshi Nishimura

Jingbo Wang

Masatoshi Nishio

Yoshiaki Takenaka

Shinya Domoto

Naoya Kato

Yasushi Mukai

Takayuki Yamashita

Kenji Hoshino

Hiroyuki Hayashikawa

Masato Maede

Shozo Ochi

Tomonari Nebashi

Mitsuru Mukai

Atsushi Ichinose

Takasi Kakutani

Daiki Imoto

Laser processing head () of the present disclosure includes housing (), transparent protector (), and temperature sensor (). Housing () includes an optical path of processing laser light (LB). Transparent protector () is detachably fixed to housing (), passes processing laser light (LB), and suppresses dust of work material (W) entering into housing (). Here, the dust is generated from the work material (W) irradiated with processing laser light (LB). Temperature sensor () detects the temperature of transparent protector ().

Laser processing head and laser processing system using same

A cooling unit includes a unit main body including a bottom portion, a peripheral wall portion rising from the peripheral edge of the bottom portion, and a seal for sealing an opening of the unit main body. The unit main body is joined to the seal through a plasticized region, and a void is defined in the peripheral wall portion of the unit main body.

Cooling unit and method for manufacturing cooling unit

A laser device includes a laser oscillator configured to emit a laser beam, and an optical unit configured to receive the laser beam and emit the laser beam outside. The optical unit includes: a partially transmissive mirror configured to reflect a part of the laser beam toward the outside and transmit a remaining part of the laser beam; a diffusion plate configured to diffuse the laser beam which has passed through the partially transmissive mirror and deflect the laser beam in a predetermined direction, at a predetermined diffusion angle; and a photodiode configured to receive the laser beam deflected by the diffusion plate, and output an electric signal. The laser device is configured such that deviation of an optical axis of the laser beam is monitored based on the electric signal of the photodiode.

Laser device and laser processing device using same

Laser processing device () includes: laser-beam switching apparatus () that switches between a first optical path and a second optical path as an optical path along which a laser beam is to travel, the first optical path including first fiber (), the second optical path including second fiber () that has a core diameter that is larger than a core diameter of first fiber (); and processing head () that illuminates a same processed point on workpiece () with a laser beam that has passed through the first optical path or the second optical path. When illumination with laser beam that has passed through the first optical path is performed for a predetermined period of time, laser-beam switching apparatus () switches from the first optical path to the second optical path.

Laser processing device and laser processing method

A laser oscillator includes a plurality of laser modules, beam coupler () that couples a plurality of laser beams (LBto LB) emitted from the plurality of laser modules to form a coupled laser beam, beam coupler () emitting the coupled laser beam, and a condensing lens unit having a condensing lens, the condensing lens unit condensing the coupled laser beam to have a given beam diameter and guiding the condensed coupled laser beam to a transmission fiber. Beam coupler () has optical members (OCto OC) configured to change optical paths of laser beams (LBto LB). By changing the optical paths of laser beams (LBto LB) by optical members (OCto OC,) a beam profile of the coupled laser beam emitted from the transmission fiber is changed without adjusting a position of the condensing lens.

Laser oscillator, laser machining device in which same is used, and laser oscillation method

There is provided an optical axis alignment mechanism between the laser oscillator and the optical fiber. The laser oscillator emits laser light, which then emerges from the emission end of the optical fiber via the axis alignment mechanism. Part of the laser light is received on the light-receiving surface of the CCD camera of a laser light evaluator. Thus, the laser light evaluator acquires a light intensity distribution. The light intensity distribution is used by the optical axis alignment mechanism to align the axis of the laser oscillator with the axis of the optical fiber.

Alignment method

A laser device includes a laser oscillator that generates a laser beam, condenser lens that condenses laser beam emitted from the laser oscillator, transmission fiber that includes at least core that transmits laser beam condensed by condenser lens, and cladding provided around core, and a lens driving unit that adjusts a position of condenser lens. The lens driving unit automatically adjusts the position of condenser lens to reduce light intensity of laser beam incident on cladding.

Laser device

A laser processing head includes parallel plate () that shifts an optical axis of a laser beam to be emitted from a top to a bottom of body case () from a first optical axis to a second optical axis, parallel plate () that shift the optical axis of the laser beam from the second optical axis to a third optical axis, and body case () that accommodates holders (and) that respectively hold parallel plates (and). The laser processing head further includes a rotation mechanism that rotates holders (and) around a first rotary axis. Opening () that a laser beam reflected by an incident surface of second parallel plate () passes through is formed in holder (), and light receiving part () that receives the laser beam having passed through opening () is disposed in body case ().

Laser processing head and laser processing device using same

A laser device includes: a laser resonator for emitting a laser beam; a condenser lens for collecting the laser beam emitted from the laser resonator; an optical fiber for transmitting the laser beam collected by the condenser lens; at least one light sensor opposing a light receiving surface of the condenser lens and outside an optical path of the laser beam, the at least one light sensor detecting an amount of return light from the condenser lens; and a controller for determining a presence of an abnormality when a value of the amount detected by the at least one light sensor is greater than a predetermined maximum threshold.

Provided is a power conversion apparatus including: a plurality of power converters including a first power converter and a second power converter simultaneously operated by power supplied via a first connector; and a heat dissipation board having a first pattern formed thereon for distributing the power supplied via the first connector to the first power converter and the second power converter.

Power conversion apparatus

A fiber coupling device () includes the following components: a wedge plate () for receiving light and refracting the light in a predetermined direction, a condenser lens () for collecting the light refracted by the wedge plate (); and an optical fiber () having an incident surface for receiving the light collected by the condenser lens (). The wedge plate () is held rotatable around the optical axis () of the light incident on the wedge plate (). The light refracted by the wedge plate () and collected by the condenser lens () is incident on a different point on the incident surface depending on the rotation angle of the wedge plate ().

Fiber coupling device

A fiber coupling device includes a housing and a window provided in the housing. The fiber coupling device is configured to collectively guide plural laser beams to at least a first fiber, the plurality of laser beams each being emitted from a corresponding one of plural external laser light sources and entering through a laser beam inlet. The housing is configured such that the laser beams enter the housing from the laser beam inlet. The window is provided inside the housing and faces the laser beam inlet. The fiber coupling device is not required to detach when an optical axis is adjusted.

A condenser lens for collecting a laser beam () is disposed between the laser oscillator and the incident end surface of the optical fiber. The laser beam () is divided into a plurality of beams (). The power of the laser beam () is measured and maximized by adjusting the position of the condenser lens. The FFP of the laser beam () is measured and minimized by adjusting the position of the condenser lens. These adjusted positions are stored as the first and second lens positions. The FFP of the laser beam () is measured while the condenser lens is being moved between these positions so as to make the BPP not more than a predetermined value.

Growing community of inventors

Osaka, Japan

Ryo Ishikawa