| 摘要 |
PROBLEM TO BE SOLVED: To effectively direct the reflected and scattered light to a viewer to a viewer side by inclining the major axis of acicular magnetic particles from a substrate surface by the magnetic field from conductive wires. SOLUTION: A magnetization surface 3 is formed on one surface of a thin transparent substrate 1 by depositing a perpendicularly magnetized film 2 having easy magnetization in the normal direction with the surface. The parallel arranged conductive wires 4 are arranged along the other surface. The conductive wires 4 are formed by arranging the conductive wires extending in one direction in parallel at specified intervals and are impressed with the currents of the same magnitude and direction from the current supply sources sides connected to the respective wire ends. Acicular magnetic particles 6 are sprayed on the magnetization surface 3 and are adhered to the magnetization surface 3. The acicular magnetic particles 6 are so arrayed that the major axis thereof faces the normal direction of the magnetization surface 3 in the state that the currents are not impressed on the conductive wires 4. When the currents are so impressed on the conductive wires 4 as to flow in the prescribed direction, the major axis of the acicular magnetic particles 6 incline according to the intensity of the magnetic fields. Namely, the angle of inclination is controlled according to the current values of the conductive wires 4. |
