| 摘要 |
Information-recording process in which a pulsed laser produces recording marks in the form of crisply-defined areas of surface relief on the surface of a recording medium such as APIEZON W wax, iodine doped epoxy resin, and other materials. The medium is selectively producable in different density states by cooling it at a selected cooling rate from the molten state, and can be switched between said states by controlled exposure to the laser light, thus permitting recording, erasing, and recording on the medium. The permits very small marks of less than 1 micron diameter to be produced using a diffraction-limited spot of light, and as surface relief of high aspect ratio can be obtained at low power levels, it is possible to achieve high packing densities and high signal to noise ratio at low energy costs. |
