| CPC G02B 27/0172 (2013.01) [G02B 6/0035 (2013.01); G02B 2027/0178 (2013.01)] | 7 Claims |
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1. An optical device comprising:
a light guide with a main surface;
a plurality of half mirrors arranged in the light guide; and
an incident angle adjusting member,
the light guide being an optical member for guiding incident image light from one part to other part by the light guiding nature of the main surface;
each of the plurality of half mirrors being an optical member displaying a virtual image as a display image by entering into a human eye as the virtual image after making the image light traveling through the light guide by the light guide nature thereof emit outside, and having a reflection characteristic for a part of the image light to be reflected on a back surface opposing to the human eye;
the incident angle adjusting member being an optical member for adjusting the incident angle of the image light on the main surface of the light guide in accordance with the reflection characteristics of each of the plurality of half mirrors to form an image light not satisfying the total reflection condition on the main surface in an other part of the image light, to balance the brightness of the displayed image.
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