| 摘要 |
<p>An optical projector arrangement comprises a light source (1) light from which is formed a collimated beam travelling along an axis (5) by optics (2, 4). The light is split into red, green and blue components travelling in different paths by a splitter (8), these being subsequently recombined by a synthesiser (30) to continue along the axis (5) to a projection lens (32). A respective liquid crystal modulator (22, 23, 25) is included in each different path. In order to increase the optical length of the path taken by the green component to be equal to the lengths of the paths (7, 9) taken by the red and blue components, a path length compensator (34) is included in the path for the green component, which path would otherwise be along the axis (5) for the whole of its length.</p> |
