JIG FOR MULTI-FACE FORMATION OF HOLOGRAM ORIGINAL PLATE AND MULTI-FACE FORMATION OF HOLOGRAM ORIGINAL PLATE BY USING THE SAME

摘要

PURPOSE: To prevent the generation of openings between hologram original plates by installing frame materials and upper surface plate consisting of a material having a small coefft. of thermal expansion on a lower surface plate consisting of a material having the coefft. of thermal expansion approximately equivalent to the coefft. of thermal expansion of the hologram original plates. ;CONSTITUTION: The frame materials (square plates) 12 which are subjected to a treatment to smooth the surface and consist of the material, such as Ti or W, having the small coefft. of thermal expansion (thermal contraction) are fixed by means of fixing screws 13 onto the lower surface plate 11 consisting of the material, such as Ni or Fe, having the coefft. of thermal expansion (thermal contraction) approximately equivalent to the coefft. of thermal expansion of the hologram original plates to form a recessed part having a muti-face original plate shape. The upper surface plate 15 which consists of the material, such as Ti or W, having the small coefft. of thermal expansion (thermal contraction) and has a projecting part of the shape fitting into the recessed part is installed thereon. The generation and expansion of the openings in the joint parts by the thermal expansion and contraction caused by a temp. change in a hot pressing at the time of joining the hologram original plates to a backing base material via hangs are suppressed in such a manner.;COPYRIGHT: (C)1993,JPO&Japio