Abstract: A method of manufacturing an optical member includes: providing a polycrystalline wavelength conversion member including phosphor particles and having a first surface and a second surface opposite to the first surface; forming a modified portion inside the wavelength conversion member by focusing laser light inside the wavelength conversion member; and cleaving the wavelength conversion member with the modified portion being a starting point, which includes pressing the wavelength conversion member from a first surface side.

Abstract: Provided is a precise alignment method for an optical component that positions a slider to X-axis and Y-axis coordinates of maximal intensity in a manner such that frame images of a laser beam passing through an optical waveguide are captured while relatively moving the slider and a semiconductor laser device at a uniform speed in the X and Y directions, the X-axis coordinate of the maximal intensity is calculated by performing a fitting calculation only in the X direction, frame images of a laser beam passing through the optical waveguide are captured by relatively moving the slider and the semiconductor laser device at a uniform speed only in the Y direction while the X-axis coordinate is fixed, and the Y-axis coordinate of the target maximal intensity is calculated by performing a fitting calculation only in the Y direction.

Abstract: Provided is a precise alignment method for an optical component that positions a slider to X-axis and Y-axis coordinates of maximal intensity in a manner such that frame images of a laser beam passing through an optical waveguide are captured while relatively moving the slider and a semiconductor laser device at a uniform speed in the X and Y directions, the X-axis coordinate of the maximal intensity is calculated by performing a fitting calculation only in the X direction, frame images of a laser beam passing through the optical waveguide are captured by relatively moving the slider and the semiconductor laser device at a uniform speed only in the Y direction while the X-axis coordinate is fixed, and the Y-axis coordinate of the target maximal intensity is calculated by performing a fitting calculation only in the Y direction.

Abstract: An abrasive is produced by crushing a cured product of a phenol resin composition into particles, and washing with water and drying the particles. The phenol resin composition may comprise as principal constituents a phenol resin and an organic filler, or a phenol resin, an organic filler and an inorganic filler.

Abstract: The apparatus for sealing the heads of containers with a biaxially oriented plastic film comprises a horizontal conveyor for conveying the containers to be sealed, and a horizontal endless belt disposed above the conveyor in parallel thereto and including a lower traveling portion adapted to be driven in the same direction as the conveyor at a speed equal to the speed of the conveyor.