| 摘要 |
PURPOSE:To allow the image transmission of only when an image is made incident from a specific direction by forming the image transmission body in such a manner that the center of a refractive index distribution exists in the position deviated from the center of the optical transmission body and the refractive index distribution changes continuously toward the outer periphery of the optical transmission body. CONSTITUTION:Of >=2 kinds of polymerizable mixtures, the polymer mixture which generates the higher refractive index is used for the inside of an unpolymerized molding and the polymer mixture which generates the lower refractive index is used for the part nearer the periphery of the unpolymerized molding. The image transmission body, the refractive index distribution of which decrease gradually from the center thereof toward the outer periphery, is, therefore, obtd. The image transmission body, the refractive index distribution of which increase from the center thereof toward the outer peripheral part is obtd. if the above are reversed. The image transmission only when the light is made incident from the specific direction is possible in this way. |
