| 摘要 |
PROBLEM TO BE SOLVED: To provide a light modulator which has high utilization efficiency of light, can be manufactured at a low cast and has a double-focus lens effect and also to provide an optical head device using the modulator. SOLUTION: Manufacture of this modulator comprises: forming a concentric- circular transparent electrode 6 on the surface of each of a pair of glass substrates 4; further forming a polyimide film 5 on the surface of the transparent electrode 6; then, subjecting the polyimide film 5 to rubbing treatment in a prescribed direction; laminating and sticking together the resulting pair of glass substrates 4 so that the two transparent electrodes 6 are opposite to each other and the rubbing directions of the two polyimide films are consistent with each other; and thereafter, filling the space between the pair of glass substrates 4 with a liquid crystal 7 under vacuum. |
