A laser beam machining apparatus including a laser beam irradiation unit, the laser beam irradiation unit including: a laser beam oscillator for oscillating a laser beam; a beam splitter by which the laser beam oscillated by the laser beam oscillator is split into a first laser beam and a second laser beam; a rotary half-wave plate disposed between the laser beam oscillator and the beam splitter; a condenser lens disposed in a first optical path for guiding the first laser beam split by the beam splitter; a first reflecting mirror disposed in a second optical path for guiding the second laser beam split by the beam splitter; a first quarter-wave plate disposed between the beam splitter and the first reflecting mirror; a second reflecting mirror disposed in a third optical path for splitting thereinto the second laser beam returned to the beam splitter through the second optical path; a second quarter-wave plate disposed between the beam splitter and the second reflecting mirror; and a cylindrical lens disposed between the beam splitter and the second quarter-wave plate.

Laser beam machining apparatus

PROBLEM TO BE SOLVED: To provide a fragile material dividing and cutting apparatus capable of dividing and cutting even a thick fragile material with high precision in a short time. SOLUTION: The laser beam L emitted from a laser oscillator 12 is expanded cylindrically by first and second axicon lenses 14A and 14B which constitute a condensing means 13 and subsequently condensed by a third axicon lens 14C and a convex lens 15. The laser beam becomes a condensing beam C, which is positioned at the almost central part of the fragile material 2 and becomes half or above the thickness of the fragile material 2 in focal depth, by the condensing means and, when the condensing beam is moved along a dividing and cutting scheduled line by a moving means 5, a modified region T is formed to a part where the condensing beam passes. By forming a crack to the surface of the fragile material from both ends of the modified region, the fragile material can be divided and cut. COPYRIGHT: (C)2006,JPO&NCIPI

Method and apparatus for dividing and cutting fragile material

A method and apparatus utilizing a prediction guided decimated search motion estimation algorithm are provided. The prediction guided decimated search motion estimation algorithm generates a motion vector used to encode a macroblock in a frame from a video sequence. The algorithm includes generating full-pixel seed vectors, performing a full-pixel search around the generated seed vectors, which is followed by a fractional pixel search. The full-pixel seed vectors generated are a predicted motion vector and a hierarchical motion vector. A fractional pixel search may be conducted around a final motion vector generated by the full-pixel search and may include a half-pixel search and a quarter-pixel search. The prediction guided decimated search motion estimation algorithm can be implemented in both software and hardware. The algorithm is characterized by improved efficiency, scalability, and decreased complexity.

Motion estimation using prediction guided decimated search

A laser optical device includes a laser oscillator, a beam shaping optical device for shaping a laser beam emitted from the oscillator to form a shaped laser beam, and a plurality of incidence lenses arranged to make the portions of the shaped laser beam incident on the incidence lenses equal. The device further includes beam transmitting optical fibers for receiving laser beams into which the laser beam passed through the incidence lenses is divided.

Laser optical device

PURPOSE:To restrain the unevenness at a joint part in the scanning range of laser beam irradiation and to shorten the time needed to recrystallization, in a laser beam annealing device for executing the recrystallization of silicon thin film by the irradiation of the laser beam CONSTITUTION:Energy of the laser beam 2 from a laser oscillator 1 is changed with an attenuator 3 and the uniformity of the energy is improved with a homogenizer 4 After deciding the energy of the laser beam 2 through a lens system 5, the laser beam is transmitted to a beam dividing system 6 and divided into plural laser beams 2a, 2b and irradiates the silicon film 8 on a substrate 7 shifted toward two dimensions

Laser beam annealing device

PURPOSE:To widen a processable region by disposing aspherical lenses which make uniform the sectional intensity of the laser beam emitted from a laser transmitter and plural rows of condenser lenses on the plane in the optical path of the laser beam made uniform by the above-mentioned lenses. CONSTITUTION:The sectional intensity distribution of the laser beam 2a having a gauss distribution is made uniform by using the aspherical lenses 3, 4. The uniformized laser beam 2b is projected to a condensing optical device 8 constituted of several pieces of the condenser lenses 11. Since the intensity of the incident laser beams on the respective condenser lenses is uniform, the laser energy density at the respective processing points condensed by the condenser lenses is equaled as well. The uniform processing of even the central part and peripheral part of the processing region is possible in this way and further, the effective utilization of the greater part of the energy of the laser beam for processing is possible and, therefore, the processable region is widened.

Laser processing device

PROBLEM TO BE SOLVED: To locally form a spray coating on a work with excellent accuracy by covering a part, in which the thermal spraying is unnecessary, of a traveling work to be thermally sprayed by a circulating shield material to perform the thermal spraying, and successively scraping the thermally spraying material adhered to the shield material. SOLUTION: A work 10 to be thermally sprayed is successively moved in the arrow direction by a moving means 11 such as a belt conveyor, and the thermal spraying material is ejected from a thermal spraying means 20 at the thermal spraying position A to form a sprayed coating. Approximately rectangular shield members 30, 31 stretched across four pulleys 32 are driven in the arrow direction to cover a part of the work where the thermal spraying material is unnecessary at the thermal spraying position A. The thermally sprayed work 10 is successively carried out by the moving means 11, and at the same time, the shield members 30, 31 are also moved from the thermal spraying position A to an evacuation position B, unnecessary adhered deposition is successively removed by a scraping means 40, and again circulated to the thermal spraying position A. The thermal spraying can be performed to the work 10 keeping constantly a correct thermal spraying boundary.

Method for masking in thermal spraying and device therefor

PROBLEM TO BE SOLVED: To perform the welding between laminated plates at an appropriate welding position by easily positioning the focal point of the laser beam in the direction of the plate lamination of the laminated plates SOLUTION: In the positioning method of the moving direction (b) of a core plate group of the focal point 11, when an X-drive screw 29 of an XY stage 9 is operated, and an optical fiber connection part 5 is shifted by ΔA in the direction (b), the pre-adjustment optical path is changed to the post-adjustment optical path, and the focal point 11 is moved in the direction (b) by ΔB When the focal distance of condenser lenses 2, 3 are f1, f2 respectively, the movement ΔB of the focal point 11 by the movement ΔA of the optical fiber connection part 5 can be obtained by the formula of ΔB=ΔA×f2/f1 ΔB equals to the total error in which the error from the initially set value of the thickness of a metallic plate stock 33 for cores is added by the prescribed number, and the laser beam can be focused to an appropriate welding position by operating the X-drive screw 29 to move the optical fiber connection part 5 in the direction (b) by ΔA to satisfy the relationship of the formula for positioning

Laser beam emission lens-barrel, and laminated plate manufacturing press

PROBLEM TO BE SOLVED: To provide a laser beam machining device and a method therefor suitable for working in need of high accuracy SOLUTION: A laser beam machining device 10 is equipped with a table 20 to hold a work 24 and a moving mechanism (motor 22 etc), to move the table 20 to a first direction (X direction) On the other hand, the laser system has a laser oscillator 32 to emit laser beam, a mask 52 to arrange the laser beam emitted from the laser oscillator into a prescribed sectional shape, and a rotary mirror 44 or the like to scan the arranged laser beam into a second direction (Y direction) perpendicular to the first direction with regard to the work

Laser beam machining device and method therefor

PROBLEM TO BE SOLVED: To enable a positional adjustment by adjusting an inclination of a shaft even though a force-fitting allowance is small and a vertical precision of the shaft is not satisfactory. SOLUTION: An inclination between a shaft 2 and the surface of a supporting base body 1 at an attaching base part 2a of the shaft 2 as a center is adjusted by a plastic deformation when contraction and solidification owing to cooling are caused from temperature rising or a molten state owing to heating or/and melting in a part irradiated with laser beams 3 in the vicinity of the attaching base part 2a of the shaft 2 by cooling after the vicinity part of the attaching base part of the shaft 2 whose one end is attached to the supporting base body 1 is rradiated with the laser beams 3 from one side to heat and melt it.

Inclination adjusting method of shaft and its device

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