Abstract: 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 (2) is scanned with a beam in a parallel direction, while irradiating a protrusion (8) generated on the color filters (3-1, 3-2, 3-3) formed on a transparent substrate (2) with a beam collected by a high NA condensing lens (18), and a protrusion (8) is removed or modified.

Abstract: 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 (2) is scanned with a beam in a parallel direction, while irradiating a protrusion (8) generated on the color filters (3-1, 3-2, 3-3) formed on a transparent substrate (2) with a beam collected by a high NA condensing lens (18), and a protrusion (8) is removed or modified.

Abstract: 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.

Abstract: [PROBLEMS] To provide a method and an apparatus for cutting a conductive link of a redundant circuit in a semiconductor circuit. [MEANS FOR SOLVING PROBLEMS] A method is provided for selectively cutting a plurality of conductive links embedded in a protection layer which covers at least the conductive links in a semiconductor device formed on a semiconductor substrate. A focused beam is aligned with a target link, a first pulsed laser beam having a short laser wavelength of 400 nm or shorter and a second pulsed laser beam having a wavelength longer than 400 nm are generated, the first and the second pulsed laser beams are overlapped and applied onto the conductive link from over the protection layer. Preferably, the second pulsed laser is applied after the first pulsed layer in terms of time.

Abstract: A problem diagnosis method and problem repair method for a laser device such as laser treatment devices used in the medical field and laser processing devices used in industrial fields, capable of detecting problems in laser devices early and reducing the time required for maintenance work on the laser devices are provided. The method comprises a step of measuring the intensity of scattered light generated by an optical part inside the laser device; a step of 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 a step of determining what kind of maintenance work is necessary based on the seriousness of the problem.

Abstract: A laser device that generates a CW laser beam in the ultraviolet range with a wavelength of less than 200 nm by inputting two laser beams having different wavelengths to a nonlinear optical crystal which is, for example, a CLBO crystal, to perform sum frequency mixing, and among the two laser beams, at least one laser beam is output from a fiber laser device. Thereby, the volume of the laser device portion of a processing device or a measuring device that uses an ultraviolet laser beam can be made small, and the effective use of workspace can be realized.

Abstract: 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 106 is composed of a quasi-continuous wave oscillation mode laser diode (QCW-LD) 101, a laser crystal 103, a rear mirror 104 and an output mirror 105. The QCW-LD 101 is driven by an LD power source 102 capable of modulating the pulse waveform in time. A beam adjusting portion 108 comprises a wave plate, a polarizer, a lens and an isolator. A wavelength converting portion 112 is an optical parametric oscillator (OPO) comprising a non-linear optical crystal 109, an OPO input mirror and an OPO output mirror 111.

Abstract: 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.

Abstract: 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.

Abstract: 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 106 is composed of a quasi-continuous wave oscillation mode laser diode (QCW-LD) 101, a laser crystal 103, a rear mirror 104 and an output mirror 105. The QCW-LD 101 is driven by an LD power source 102 capable of modulating the pulse waveform in time. A beam adjusting portion 108 comprises a wave plate, a polarizer, a lens and an isolator. A wavelength converting portion 112 is an optical parametric oscillator (OPO) comprising a non-linear optical crystal 109, an OPO input mirror and an OPO output mirror 111.