Optical memory device and method for fabricating optical memory device, and method and apparatus for lamination with filmy member

Abstract

An optical memory device is specifically so designed that, when an reference beam is applied thereto, the entire information area of its core layer can receive the reference beam all at a time to surely reconstruct a correct image. The optical memory device includes a core layer and a cladding layer laminated on both surfaces of the core layer. In this device, at least one interface between the core layer and the cladding layer has a concave and convex pattern for information to form a waveguide and a reference beam is introduced into the core layer through the end of the waveguide for reconstructing the information recorded in the concave and convex pattern for information, and the degree of bending, &Dgr;t, of the core layer at the end of the information area in which the concave and convex pattern for information is formed satisfies the condition represented by &Dgr;t≦d−t, in which d indicates the vertical width of the reference beam, and t indicates the thickness of the core layer in the information area.