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Design of a See-Through Head-Mounted Display with a Freeform Surface
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 Title & Authors
Design of a See-Through Head-Mounted Display with a Freeform Surface
Wang, Junhua; Liang, Yuechao; Xu, Min;
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This paper described an off-axis head-mounted display system. It is composed of a 7-piece coaxial relay lens group and a freeform surface combiner. This configuration has a simple structure and a wide field of view (FOV). In this design, a freeform surface is chosen as the combiner, to simplify the structure and attain good image quality. We generated this freeform surface by considering both coordinates and normals of discrete data points. Moreover, we realize a coaxial structure in the relay lens group, which is compact and benefits from a loose tolerance requirement. The HMD system we finally realized has a 40° × 30° FOV and 15-mm exit pupil diameter.
Head-mounted display;Freeform surface;Combiner;Coaxial relay lenses;
 Cited by
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