| 摘要 |
<p>The light from the image forming element 2 is reflected by the PBS 8, and is incident on the »/4 plate 7 so that this light is converted into circularly polarized light. Subsequently, the light is subjected to a reflection/diffraction effect and image focusing effect by the reflective type HOE 6. Then, this light again passes through the »/4 plate 7, and is transmitted through the PBS 8. As a result, the light enters the eye of the user after being synthesized with light from the outside world. The system is devised so that the relationships of -5 < ¸1 < 5 and |¸1 - ¸2| < 3 are established between the angle of incidence ¸1 (°) at which the principal rays emitted from the center of the display part of the image forming means are incident on the reflective type holographic optical element, and the reflection/diffraction angle ¸2 (°) when this light is diffracted/reflected by the reflective type holographic optical element. This makes it possible to achieve the improvement of the image quality of the display image in cases where the center of the pupil of the eye of the user deviates from the center of the exit pupil of the image combiner.</p> |
