| 摘要 |
PURPOSE:To extend the life of a laser system, by using a liquid crystal material as the storage material of the domain forming pattern of a disk for optical memory. CONSTITUTION:A thin-film metallic layer 11 to be used for providing a reflecting surface is formed on a substrate 10 made of glass, plastic, etc., and liquid crystal molecules 12 are regularly arranged in X-axis direction on the layer 11. When the deflected wave surface of writing laser lights is inputted in a specific spot under the condition shown in Fig. (a), part of the liquid crystal molecules 12 is disturbed in orientation and becomes the condition shown in Fig. (b). Reading laser lights are irradiated upon the disturbed liquid crystal molecules 13. The deflected wave surface of the reading laser lights is in X-axis which is the same as the arranging direction of the molecules. The laser lights are scattered and distributed in various directions and only 10% or less quantity of the lights returns to a pickup located above. On the other hand, the laser lights made incident on the liquid crystal molecules 12 which are not distributed in orientation are reflected by the reflecting surface 11 and almost all quantity of the lights is returned to the pickup as shown by Fig. (c). Therefore, the optical characteristic changes at a low temperature and the stability can be maintained for a long time. |
