Abstract: In a hearth liner wherein an evaporation material is adhered to a substrate to form an optical thin film thereon, the present invention is directed to prevent bumping (splashing) when the evaporation material is irradiated by an electron beam from an electron gun to melt and vaporize thereof. A hearth liner of a vacuum evaporation apparatus wherein the electron beam from the electron gun is irradiated on the evaporation material to form an optical thin film on a substrate, wherein the cross-section shape of an evaporation material storage part of the hearth liner is a shallow semicircular (spherical) shape (bowl shape).

Abstract: A memory accessing system for vector data processed, or to be processed, by a vector processing apparatus comprising plural vector processing units, each unit performing vector data processing for a corresponding portion of vector data elements, the elements being ordered and the vector data processing being carried out in the order of the elements. The system comprises plural memory access units corresponding to the plural vector processing units, each thereof accessing a predetermined portion of the elements of vector data in a main memory.