| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light-emitting device having simple configuration, which can emit only the light polarized in one direction. <P>SOLUTION: The light-emitting device is so constructed that a light-emitting element 12, a quarter-wavelength film 14 and a reflecting-polarized film 15 are laminated in this order on a light-reflecting body. With this configuration, an incoherent light L1 which is emitted from the light-emitting element 12 is transmitted through the quarter-wavelength film 14, and next only a p-polarized light L2, for example, of the transmitted light is transmitted through the reflecting-polarized film 15, while an s-polarized light L3 of the transmitted light is reflected by the reflecting-polarized film 15. The reflected s-polarized light L3 is transmitted through the quarter-wavelength film 14 and becomes a circularly polarized light L4. The circularly polarized light L4 is reflected by a light-reflecting plane 11a and becomes a circularly polarized light L5, having reverse direction for rotation. The circularly polarized light L5 is transmitted through the quarter-wavelength film 14 and becomes an p-polarized light L6. The p-polarized light L6 is transmitted through the reflection polarization film 15, as it is. Consequently, the incoherent light L1, which is emitted from the light-emitting element 12 can be outputted, without an additional polarization conversion element or the like, by converting the incoherent light L1 into a single polarized light (p-polarized lights L2 and L6). <P>COPYRIGHT: (C)2005,JPO&NCIPI |
