| 摘要 |
PURPOSE:To hold uniform brightness on the whole plane by laminating light transmissible sheets having a refractive index different from that of a plate-like base on the base so that the end parts of the sheets in the base are arranged like steps and respective sheets are separated with intervals. CONSTITUTION:The light transmissible sheets 2A-2F having the refractive index different from that of the plate-like base 1 are laminated with intervals in the base so that the end parts of the sheets in the base are arranged like steps. A base sheet 1a for constituting the base 1 is arranged, the sheet 2F is arranged on the sheet 1A and a base sheet 1B is arranged on the side of the sheet 1A. Then, a base sheet 1C is laminated on the sheets 2F, 1B and the sheets 2E-2A and base sheets 1D-1M are successively laminated. These laminated array are pressed by means of a heat making machine under heating to obtain an optical transmitter. Thus, the plane-like light source having uniform brightness on the whole plane can be obtained. |
