Cyber Laser Inc.

Nec Corporation

Tetsumi Sumiyoshi

Hitoshi Sekita

Akira Watanabe

Tadashi Okuno

Susumu Tsujikawa

Yoshio Otani

Hiroshi Tsugita

Akira Shiratori

A method for removing and modifying a protrusion by using a short pulse laser is provided for modifying a color filter. In a color filter modifying method, a transparent substrate () is scanned with a beam in a parallel direction, while irradiating a protrusion () generated on the color filters (---) formed on a transparent substrate () with a beam collected by a high NA condensing lens (), and a protrusion () is removed or modified.

Substrate manufacturing method including protrusion removing step

A problem diagnosis method and problem repair method for a laser device are provided. The method includes measuring the intensity of scattered light generated by an optical part inside the laser device; referring to data indicating a temporal change in the scattered light predicted under predetermined operating conditions of the laser device, and predicting the seriousness of the problem from the intensity of scattered light; and determining what kind of maintenance work is necessary based on the seriousness of the problem. Additionally, the seriousness of the problem in the optical part can be predicted by executing fuzzy logic based on membership functions defining the relationship between scattered light intensity and the seriousness of problems of optical parts.

Problem diagnosis method and problem repair method for laser device

The invention offers a low-noise, compact, high-efficiency light generating device and an irradiation method thereof for use in medical applications. A fundamental harmonic laser head is composed of a quasi-continuous wave oscillation mode laser diode (QCW-LD) a laser crystal a rear mirror and an output mirror The QCW-LD is driven by an LD power source capable of modulating the pulse waveform in time. A beam adjusting portion comprises a wave plate, a polarizer, a lens and an isolator. A wavelength converting portion is an optical parametric oscillator (OPO) comprising a non-linear optical crystal an OPO input mirror and an OPO output mirror

Light generating device and laser device using said light generating device

A laser radiation device comprises a pumping light emission section, a fiber laser device and a beam guiding section. The pumping light emission section generates and emits pumping light. In the fiber laser device, an optical fiber doped with laser ions is excited by the pumping light and thereby a laser beam including two or more wavelength components is generated. The beam guiding section guides the laser beam into desired place and direction. The laser beam including the two or more wavelength components having characteristic effects are focused by a beam shaping section and applied to the surface of an object. When holmium ions are doped in the optical fiber of the fiber laser device as the laser ions, a laser beam including a 3 &mgr;m band component (which is suitable for precise incision of a living body) and a 2 &mgr;m band component (which is suitable for tissue coagulation and hemostasis) is emitted by the fiber laser device, and the two wavelength components are applied to the surface of the object maintaining coaxiality, thereby the two effects of the two wavelength components are attained simultaneously on the object. The laser radiation device including only one laser device can be implemented with low manufacturing cost and in a small size.

Laser radiation device employing a fiber laser capable of emitting a laser beam including two or more wavelength components

A laser oscillation device, which has an optical fiber where laser ion is doped; an excitation emission element that generates one laser beam including multiple wavelength components by exciting the laser ion in the optical fiber by light emission; a total reflection element that is located at one end of the optical fiber and reflects uniformly laser beam with multiple wavelengths; a separation optical element that is located at another end of the optical fiber and separates laser beam into beams with multiple wavelengths; and a plurality of partial reflection element that reflect separately laser beams with multiple wavelengths separated by the separation optical element.

Growing community of inventors

Tokyo, Japan

Tetsumi Sumiyoshi