Provided is a laser annealing device provided with an irradiation unit in which a plurality of lens arrays each comprising one or more lenses are arranged at a first interval, wherein, while scanning a substrate having: a plurality of first area arrays each of which comprises one or more areas to be irradiated and which are arranged at the first interval; and a plurality of second area arrays which are arranged apart from the first area arrays toward one side in a direction orthogonal to the first area arrays by a second interval smaller than the first interval, the irradiation unit irradiates the areas to be irradiated with a laser beam through the one or more lenses. At least one type of area array, in one pixel unit row that comprises a plurality of area arrays including the first and second area arrays, is irradiated with a laser by use of a lens array different from the ones used for the other types of area arrays.

The present disclosure provides single-piece objects and methods for forming such objects. Such single-piece objects may be bicycle frames.

A method includes aligning a plurality i of juxtaposable laser lines in order to form a continuous overall laser line suitable for heat treating a planar substrate capable of being made to move rectilinearly in a first direction, each laser line being formed by a module that emits a laser line onto the surface S of the planar substrate, on which surface a heat treatment is capable of being carried out.

Systems and methods for additive manufacturing, and, in particular, such methods and apparatus as employ pulsed lasers or other heating arrangements to create metal droplets from donor metal micro wires, which droplets, when solidified in the aggregate, form 3D structures. A supply of metal micro wire is arranged so as to be fed towards a nozzle area by a piezo translator. Near the nozzle, an end portion of the metal micro wire is heated (e.g., by a laser pulse or an electric heater element), thereby causing the end portion of the metal micro wire near the nozzle area to form a droplet of metal. A receiving substrate is positioned to receive the droplet of metal jetted from the nozzle area.

The invention provides a method of manufacturing a press formed product which reduces the welding time and enhances the productivity. First, a main steel plate and a reinforcement steel plate are bonded by laser welding a superposed portion of the main steel plate and the reinforcement steel plate to form a superposed blank member. This superposed blank member is heated to higher temperature than the austenite transformation temperature to transform the superposed blank member into austenite. The superposed blank member transformed into austenite is then press formed and rapidly cooled with dies at the same time to be transformed into martensite, thereby forming a press formed product.

In the state in which a laser beam is split in such a manner that multiple focal points that line up along a first direction parallel to a specific crystal plane of a single-crystal material that configures an ingot are formed, the ingot and the multiple focal points are relatively moved along a second direction parallel to this specific crystal plane to form a separation layer. In this case, modified parts are formed with each of the multiple focal points being the center of the modified part. In addition, it becomes easier for cracks to extend from these modified parts along the specific crystal plane. Thus, in this case, the cracks formed inside the ingot can be made longer without setting the output power of the laser beam higher. As a result, it becomes possible to improve the throughput in manufacturing a substrate from the ingot.

A laser apparatus may include a spectrum controller and a spectrum modulator. The spectrum controller may control a center wavelength and/or a bandwidth of a spectrum of a laser beam. The spectrum modulator may modulate the spectrum of the laser beam having the center wavelength and/or the bandwidth controlled by the spectrum controller. Thus, the laser beam may have the spectrum optimal for a semiconductor fabrication process. Particularly, the substrate may be accurately diced using the laser beam having the optimal spectrum.

A laser device for additive manufacturing and an operation method thereof are provided. The laser device has a laser generation unit, a spectroscopic unit, a control unit, and a lens assembly unit. A laser beam is split into two or more beams by disposing the spectroscopic unit and the lens assembly unit. Thus, a roughness of a process surface and a process time can be reduced.

A functional member includes: a plurality of microneedles on a surface. Further, the microneedles adjacent to each other are spaced apart by a pitch ranging from 1 to 500 m, and the microneedles have a diameter ranging from 0.25 to 250 m and have a height ranging from 5 to 200 m.

A method includes projecting energy onto an annular edge of a glass substrate. The annular edge includes a first roughness. The first roughness is reduced to a second roughness with the energy. The energy reduces the first roughness without changing a roundness of the annular edge of the glass substrate.