| 摘要 |
<p>An optical device for combining at least two sub-beams (bG, bR, bB) of different colours to one colour beam (bC) is described, which device comprises at least one colour-selective reflector (21, 23) which is arranged on a transparent plate-shaped substrate (20, 22). By using a correction element (45a, 45b) composed of a first sub-element chosen from the group of cylindrical lens and obliquely arranged spherical lens, and a second sub-element chosen from the group of plane-parallel plate, wedge and prism, aberrations caused by the substrate in a sub-beam can be corrected.</p> |
