| 摘要 |
<p>A head mounted display system (10) is shown having a single optical element (28). The single optical element (28) has three optical surfaces. An entrance surface (S1) receives a video image directly from a display (26). A reflective surface (S2) reflects the vieo image from the entrance surface (S1) to an exit surface (S3) wherein the user views the video image directly through the exit surface (S3). The three optical surfaces are shaped to generate a virtual image that is magnified, appears at a distance from the user and is substantially free from distortion, astigmatism and chromatic aberrations. The optical element (28) is adjustably mounted on a frame (12) to accommodate users with different interpupillary distances and to vary the apparent distance between the user and virtual image.</p> |
