| 摘要 |
<p>A scanning optical device includes a number of independently moveable optical heads H1, H2. Radiation generated by a radiation source is split and made incident on the heads H1, H2 simultaneously. The separate radiation beams 35, 36 are generated by splitting a single radiation beam into two orthogonally polarized radiation beams 35, 36. The separate radiation beams are then capable of similar radial areas of the optical record carrier 2 to be read.</p> |
