DUPLICATING METHOD OF INFORMATION RECORDING DISC

摘要

PURPOSE:To duplicate an information signal accurately in a short time, by bringing a transparent master in which information signals are recorded in V- shaped pits close contact with a photographic material and performing a transfer through the irradiation of light. CONSTITUTION:A master 1 is overlapped on the surface of a photographic sensing layer 4 of a disc raw material 2 so that the signal recording surface is in contact with each other and light is irradiated from the side of master 1 for exposure. Light absorption and diffusion are performed with the rugged parts of the signals on the master 1 as a lens, and the information signals can accurately be dupulicated in a short time.