Nec Corporation

Mitsubishi Electric Corporation

Mitsubishi Electronic Corporation

Naoyuki Nakamura

Masaki Seguchi

Tatsuya Yamamoto

Takao Nakagawa

Tadashi Tsukamoto

Takashi Tachikawa

Hiroshi Kurakane

Toshikatsu Hosoi

Junichi Nishimae

Hiroyuki Murai

Shuichi Fujikawa

Tomotaka Katsura

Akinori Nishio

Daiji Morita

Kazuki Kuba

Kyohei Ishikawa

Kenji Saruta

Akihiro Ueno

A laser machining apparatus includes: a laser oscillator to emit a laser beam; a focusing lens to irradiate a workpiece with the laser beam; a focus position control mechanism disposed between the laser oscillator and the focusing lens and disposed on the optical path of the laser beam and that controls the divergence angle of the laser beam and the incident diameter of the laser beam incident on the focusing lens; a laser beam deflector to deflect the laser beam before the laser beam is incident on the focusing lens; and an emitting angle control mechanism to control the emitting angle of the laser beam that exits from the focusing lens after being deflected by the laser beam deflector.

Laser machining apparatus and laser machining method

A laser machining apparatus includes: a laser oscillator that emits laser light having a plurality of wavelengths; a transmission diffractive optical element that allows the laser light to pass therethrough; a machining lens that concentrates the laser light that has passed through the transmission diffractive optical element; a distance adjustment mechanism that changes a distance between the transmission diffractive optical element and the machining lens; and an angle adjustment mechanism that changes an angle of the transmission diffractive optical element to switch between a state in which the laser light is dispersed by the transmission diffractive optical element and then enters the machining lens and a state in which the laser light enters the machining lens without being dispersed by the transmission diffractive optical element.

Laser machining head and laser machining apparatus

A laser processing head apparatus with a camera monitor includes a light source for illumination having a near-infrared laser diode that generates a near-infrared laser beam of which upper limit value is a wavelength of a laser beam for processing, and out of processing point-emitted light, a processing point-reflected laser beam and illumination light for imaging, which have passed through a condensed lens and a laser beam reflection mirror and are directed to the camera respectively. An optical filter blocks transmission of the processing point-emitted light and the processing point-reflected laser beam, and transmits the illumination light for imaging.

Laser processing head apparatus with camera monitor

A laser processing device including: a laser oscillator; a processing table; a transmission optical system for transmitting laser light emitted from the laser oscillator to the processing table; a processing head for condensing and radiating the laser light transmitted via the transmission optical system to an object to be processed; a moving mechanism for changing a relative position between the object to be processed and the laser light to be radiated to the object to be processed; and a variable curvature spherical mirror. The transmission optical system includes a reflective beam expander mechanism for collimating and magnifying the laser light from the laser oscillator. The reflective beam expander mechanism includes a spherical mirror and a concave mirror having different curvatures in two orthogonal axes.

Laser processing device

There are provided a CPU connection circuit and a method by two CPUs by alternately conducting a changeover between two buffers disposed there between to prevent an event that data processing cannot be fully executed by the CPU on the receiving side. There is included a memory controller which monitors whether or not an amount of data stored by a CCPUin either one of buffersandreaches a predetermined threshold value; when the amount of data stored by the CCPUin the bufferreaches the threshold value, the memory controller requests an ACPUto acquire the data stored in the buffer and changes the storage destination of data from the CCPU to the other one of the buffers; the threshold value is a value more than a unit quantity of data which the CCPUsends to the buffer

CPU connection circuit, data processing apparatus, arithmetic processing device, portable communication terminal using these modules and data transfer

There are provided a CPU connection circuit and a method wherein the CPU connection circuit is a circuit to be employed by two CPUs by alternately conducting a changeover between two buffers disposed therebetween to prevent an event that data processing cannot be fully executed by the CPU on the receiving side. There is included a memory controllerwhich monitors whether or not an amount of data stored by a CCPUin either one of buffersandreaches a predetermined threshold value; when the amount of data stored by the CCPUin the bufferreaches the threshold value, the memory controllerrequests an ACPUto acquire the data stored in the buffer and changes the storage destination of data from the CCPU to the other one of the buffers; the threshold value is a value more than a unit quantity of data which the CCPUsends to the buffer

CPU connection circuit, data processing apparatus, arithmetic processing device, portable communication terminal using these modules and data transfer method

When a mobile station enters into a service area of a non-subscriber communication system and uses it with a roaming service, the mobile station receives system information from a repeater station of the communication system, recognizes user interface information included in the system information, and switches the user interface of the subscriber communication system to a user interface of the non-subscriber communication system corresponding to the recognized user interface information. Thus, the mobile station can effectively use the roaming service and thereby conveniently use the mobile communication system.

Mobile communication system

In an automatic gain control circuit which has a variable gain amplifier 30 for amplifying an input TDM reception signal 160 in accordance with a controllable gain, an analog-to-digital converter 40 for converting an amplified TDM reception signal 170 into a digital signal 180, and control section 50 for determining an optimized value of the controllable gain in response to the digital signal 180 so as to supply the variable gain amplifier 30 with the optimized value of the controllable gain, the optimized value of the controllable gain is determined by the use of a signal of the time slot S(-1) immediately before the predetermined time slot S(0) when receiving the input TDM reception signal 160.

Growing community of inventors

Tokyo, Japan

Naoyuki Nakamura