Abstract: An optical path structure of a laser processing machine that irradiates a laser beam from a processing head to a workpiece to perform laser processing, includes: a casing that has an opening, a light leading unit that includes a bend block including a bend mirror which deflects a laser beam traveling within the casing toward a side of the opening and an optical path tube which protrudes from the bend block toward the side of the opening for leading the laser beam to the processing head, a sealing member that is arranged at an edge part of the opening, a moving member that is abutting against the sealing member, that slides with respect to the sealing member, and that is fixed to the light leading unit, and a drive unit that integrally moves the moving member and the light leading unit in a longitudinal direction of the moving member.

Abstract: A laser machining device according to the invention is provided with a laser oscillator for generating a laser beam, a main deflecting galvannometer mirror, an F? lens, and a sub-deflecting means arranged in an optical path between the laser oscillator and the main deflecting galvanometer mirror. A means for splitting a laser beam is provided, and the sub-deflecting means is inserted into the optical path of one of the split laser beams. At the same time, both the split laser beams are incident from the same main deflecting galvannometer mirror to the F? lens, and a numerical aperture in the optical system constituted by the main deflecting galvannometer mirror, the F? lens, and an object is set to be not more than 0.08.

Abstract: The present invention relates to a content providing system which can provide a user with a desirable content in a short time. This content providing system comprises content package receiving means for receiving a content package including a content and attribute information concerning an attribute of the content; content package extracting means for extracting a specific content package from received content packages; content package storing means including a specific area for storing the specific content package; content package alteration control means for erasing the content package stored in the specific area and so forth and inhibiting the user from erasing the detail of the content package and so forth according to an instruction signal; content package reading means for reading out the content package; and content providing means for providing the content included in the content package.

Abstract: The present invention relates to a laser beam machine having a laser oscillator, for generating a laser beam; a light path system, including galvano mirrors and an f&thgr; lens that form a light path along which the laser beam emitted by the laser oscillator is guided to an object; and a diffractive optical element, located along the light path leading from the laser oscillator to the galvano mirrors.

Abstract: A laser machining device according to the invention is provided with a laser oscillator for generating a laser beam, a main deflecting galvannometer mirror, an F&thgr; lens, and a sub-deflecting means arranged in an optical path between the laser oscillator and the main deflecting galvanometer mirror. A means for splitting a laser beam is provided, and the sub-deflecting means is inserted into the optical path of one of the split laser beams. At the same time, both the split laser beams are incident from the same main deflecting galvannometer mirror to the F&thgr; lens, and a numerical aperture in the optical system constituted by the main deflecting galvannometer mirror, the F&thgr; lens, and an object is set to be not more than 0.08.

Abstract: In a laser machining apparatus comprising a deflector for changing a direction of a laser beam outputted from a laser oscillator, and a converging lens for refracting the laser beam introduced from the deflector and focusing the laser beam onto a work to be machined, a lens position adjusting unit is provided for changing a relative position between a plurality of lenses constituting the converging lens and the lens position adjusting unit change the relative positions of the lenses so as to cancel a change in refractance of the lenses due to a change in the temperature.

Abstract: A positioning control apparatus for accurately positioning a tool and workpiece and for reducing the vibration related to positioning. The system comprises a machining table fitted with a workpiece and designed to be movable on a bed. A first detector detects the acceleration of the machining table in a moving direction, and a second detector detects the acceleration in the moving direction of a tool fitted to a column that also is coupled with the bed. The outputs of the first and second detectors are used to suppress the relative vibration of the workpiece fitted to the machining table and the tool fitted to the column in the moving direction.

Abstract: A laser cutting machine in which a laser beam is condensed by a machining lens, and while the laser beam thus condensed is being applied to a workpiece, the laser beam and the workpiece are moved relative to each other, to cut the workpiece, the laser cutting machine comprising optical axis moving means for moving the laser beam applied to the machining lens in parallel with an optical axis to a desired position on the machining lens, and optical axis movement control means for controlling the optical axis moving means in conformance with a program provided for a cutting locus to control the relative movement of the condensed laser beam and workpiece, so that the laser cutting machine which is not expensive, and can form a cut in a workpiece in such a manner that the cut is not tapered in section, without lowering the machining accuracy is obtained.