| 摘要 |
<p>An optical see-through glass type display device (100) comprises: an image projector (140) to project a virtual image; a first optical element (130) configured to induce light of the virtual image; and a second optical element (120) including a first reflective surface (122a) for reflecting light coming from the front of the second optical element (120) backwards, and a second reflective surface (124a) for retroreflecting light coming from the rear of the second optical element (120). The second optical element (120) can be switched between a first state wherein reflection is possible on the first and second reflective surfaces (122a, 124a), and a second state wherein reflection is impossible on the first and second reflective surfaces (122a, 124a).</p> |
