Abstract: A light-emitting device is described that includes a plurality of partially drivable light sources, and a color conversion component configured to convert at least part of incident light from at least part of the light sources and emit outgoing light falling in a different wavelength region from the incident light, where the color conversion component includes a pyrromethene derivative.

Abstract: An apparatus and a method for producing a casting mold are provided, according to which the casting mold having a complex shape can be obtained with stable quality. The apparatus comprises a mold having a cavity therein, a steam supply unit, a steam supply passage connected to the cavity, steam discharge passages, flow regulators disposed in the steam discharge passages to regulate an amount of the steam discharged from the cavity, and a control unit for controlling the flow regulators. After a resin-coated sand prepared by coating a refractory aggregate with a binder resin is injected into the cavity of the heated mold, superheated steam is supplied into the cavity. At this time, the control unit controls the flow regulators such that the cavity is uniformly filled with the superheated steam.

Abstract: An apparatus and a method for producing a casting mold are provided, according to which the casting mold having a complex shape can be obtained with stable quality. The apparatus comprises a mold having a cavity therein, a steam supply unit, a steam supply passage connected to the cavity, steam discharge passages, flow regulators disposed in the steam discharge passages to regulate an amount of the steam discharged from the cavity, and a control unit for controlling the flow regulators. After a resin-coated sand prepared by coating a refractory aggregate with a binder resin is injected into the cavity of the heated mold, superheated steam is supplied into the cavity. At this time, the control unit controls the flow regulators such that the cavity is uniformly filled with the superheated steam.

Abstract: A measuring apparatus is disclosed in which a surface to be measured in scanned by a scanning beam essentially normally incident upon the surface and the angular deviation of the beam of light regularly reflected from the surface is detected to measure the flatness of the surface. When the surface to be measured is such one which includes a low reflective part on which diffraction and/or scatter of light take place, and a high reflective part which may be considered almost to be a mirror surface, the measurement of flatness thereof is very difficult or impossible to carry out. This is applied, for example, to a semiconductor silicon wafer having thereon patterns for IC, LSI and the like.

Abstract: A measuring apparatus is disclosed in which a surface to be measured is scanned by a scanning beam and the angular deviation of the scanning beam of light regularly reflected from the surface is detected to know the flatness of the surface. The measuring apparatus includes an optical system for projecting the scanning beam obliquely on the surface to increase the amount of the regularly reflected light from the surface so that measurement of the flatness of even such surface containing roughened surface areas or light scattering surface area can be made with the measuring apparatus.

Abstract: A process for metal plating shaped articles, such as cast or molded articles of synthetic resins, includes the steps of (a) diffusing or scattering numerous fine metal particles (or pieces) over the surface and outermost layer of the articles, (b) etching exposed surfaces of the metal particles, (c) performing thereafter metal plating, (d) and thereby solidly combining or joining the plating layer and the articles through the medium of the fine metal particles, whereby the resulting plated articles are extremely eminent in abrasion and shock resistance which is essentially useful for casting and molding patterns or core boxes.

Abstract: A process for the manufacture of resin coated sand by mixing under agitation a mass of sand upon heated and with solid ammonia-catalyzed resol having methylol index 15 - 30 and softening point higher than 80.degree.C.