Dual-focal-plane augmented reality head-up display using a single picture generation unit and a single freeform mirror

Zong Qin*, Shih Ming Lin, Kuang Tso Luo, Cheng Huan Chen, Yi-Pai Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Two or more focal planes are required in augmented reality head-up displays (AR HUDs) to respectively present basic and interactive driving information to car drivers; whereas, solutions using two separated picture generation units (PGUs) with two sets of optics incur increased cost, reduced reliability, and expanded volume. To develop an AR HUD using a single PGU and a single curved mirror, we propose to set two logically separated regions on a single PGU and optically relay one of them to a new position to create two focal planes. A single freeform mirror acquired through careful optical and mechanical design optimization produces high image quality in an eyebox of 120 mm by 60 mm, simultaneously for a far image (9 m, 10° by 3°) and a near image (2.5 m, 6° by 2°). Finally, an AR HUD product with a compact volume of 8.5 L is fabricated to experimentally verify the design.

Original languageEnglish
Pages (from-to)5366-5374
Number of pages9
JournalApplied Optics
Volume58
Issue number20
DOIs
StatePublished - 1 Jan 2019

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