| 摘要 |
The wide angle lens system described herein allows projection devices (e.g., rear projection display devices) to be more compact than would otherwise be possible. The lens system includes a wide angle lens stage (450) and relay lens stage (430). When operating as a projection device, the relay lens stage projects a distorted intermediate image located at an intermediate prism (440) to the wide angle lens stage, which projects the image for display. The distortion cause by the relay lens stage compensates (i.e., is approximately equal and opposite) for the distortion caused by the wide angle stage. |
