검색
검색 팝업 닫기

Ex) Article Title, Author, Keywords

Article

Research Paper

Journal of the Optical Society of Korea 2015; 19(6): 614-618

Published online December 25, 2015 https://doi.org/10.3807/JOSK.2015.19.6.614

Copyright © Optical Society of Korea.

Design of a See-Through Head-Mounted Display with a Freeform Surface

Junhua Wang, Yuechao Liang, and Min Xu

Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China

Received: October 26, 2015; Accepted: November 18, 2015

Abstract

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.

Keywords: Head-mounted display, Freeform surface, Combiner, Coaxial relay lenses,

OCIS codes: 080.3620; 080.2740; 110.2960; 080.2208