| 摘要 |
PURPOSE:To enable multiple wavelength recording by using an inorganic matrix with rare earth ions dispersed into it for a recording matrix. CONSTITUTION:The optical information recording medium uses the inorganic matrix with rare earth ions dispersed as the recording matrix, and for example, it is composed by laminating plural recording matrices different in the inorganic matrices on a transparent base plate by sputtering or the like method. The rare earth ions exhibit sharp absorption spectra, and the positions of the peaks are slightly shifted by the synthetic methods of the inorganic matrices, the kinds of materials, the kinds of rare earth ions, and the like, thus permitting multiplication of recording to be executed by allowing each piece of information to correspond to each of the absorption spectra. |
