Kabushiki Kaisha Toshiba

Hitachi Communication Technologies, Ltd.

Keiichi Hirota

Hiroshi Nomura

Masahiro Yoshida

Itaru Chida

Kazuyuki Hori

Takuya Uehara

Akira Ito

Takeshi Maehara

Yuji Ishida

Jun Semboshi

Setsu Yamamoto

Hiroya Ichikawa

Shouhei Murakami

Katsunori Shiihara

Hidekazu Sasaki

Toshiaki Kurokawa

Kota Nomura

Yasuaki Tokunaga

Tomoki Suetake

A laser irradiation device in which laser light is adjusted to create a laser beam, including a protective glass window arranged in an emission region that emits the laser beam; a reflection mechanism that passes the laser beam and reflects visible light; a wavelength-dependent optical screening mechanism that cuts off light of a wavelength region other than visible light from the light that is reflected by the reflection mechanism; image pickup camera configured to capture the visible light reflected with the reflection optical element; and an image adjustment lens unit that adjusts an image in the visible light that is input from the wavelength-dependent optical screening mechanism. The wavelength-dependent optical screening mechanism is provided between the reflection optical element and the image camera.

Laser irradiation device and method of diagnosing the health of a laser irradiation head

A laser irradiation apparatus of the embodiment includes: a laser light transmission mechanism to guide laser light from a laser light source and emit the laser light from a laser light emission part; a condensing mechanism to condense the laser light; a pipe state casing to house and hold the condensing mechanism inside thereof and have an opening part to irradiate the laser light; a fluid supply mechanism to supply a fluid into the casing to emit the fluid from the opening part; a positioning mechanism provided at the casing to keep a distance from the condensing mechanism to the processing object constant by being brought into contact with the processing object; and a fluid guide mechanism to guide the fluid emitted from the opening part to flow between the casing and the processing object along an axial direction of the casing.

Laser irradiation apparatus and laser irradiation method

In a time-interleaved AD converter which combines together low-speed high-resolution AD converters for effective high speed operation, various deterioration factors possessed by each of the converters, including DC offset, conversion gain error, sampling timing error, and a frequency characteristic, need to be compensated. The compensation is performed through nonlinear filter operation in which a constant term is added to linear filter operation. A high-speed low-resolution AD converter is separately used, and through adaptive signal processing in which an output signal thereof is defined as an instruction signal, a compensation coefficient is calculated. In this condition, the compensation can be performed without the influence of quantization noise attributable to the high-speed low-resolution AD converter.

Time-interleaved AD converter

Growing community of inventors

Yokohama, Japan

Keiichi Hirota