METHOD FOR RESTORING OPTICAL CARD

摘要

PURPOSE:To repair flaws which are generated on the front side of a transparent base material and cause troubles at the time of optical recording and reproducing of information and to permit recording and reproducing again by coating a transparent resin having about the same refractive index as the refractive index on the front side of the transparent base material onto the flawed surface of said material. CONSTITUTION:The flaws which are generated on the front side of the transparent base material of a DRAW type optical card formed by laminating an optical recording layer and the transparent base material having track grooves successively on a card base material and cause troubles at the time of optical recording and reproducing of information are repaired by coating the transparent resin having about the same refractive index as the refractive index on the surface side of the transparent base material onto the flawed surface and curing the same to form the transparent resin layer on said surface. The transparent resin layer and the front side of the transparent base material are thereby finished to nearly the same degree of the refractive index and the reexecution of the recording and reproducing is permitted.