| 摘要 |
PURPOSE: To enable a focused light beam to be used as a heat source by heating the prescribed region of an amorphous solid provided with a first refractive index and converting it into a second refractive index. CONSTITUTION: This optical storage device 40 is provided with a motor 52 and designed to move a disk 48 having a write laser 44, a read laser 46 and a storage medium 50. In addition, the laser 44 is provided with a function for supplying a laser beam 58 to the upper face 60 of the disk 48 through a lens 59. Then, an amorphous solid is selected that has a first refractive index, the lens 59 supplying a laser beam 61 focused on the surface 60 of the disk 48. As a result, with the prescribed region of the amorphous solid heated by the beam 61, the refractive index is converted to a second refractive index. Consequently, using a material with a sufficiently high crystallizing temperature or a melting point, the amorphous can be converted without overwriting through the crystallization of the material. Incidentally, reading is possible repeatedly by writing this information on a carbon film. |
