AI Article Synopsis
- Two or more focal planes are necessary for AR head-up displays (HUDs) to provide both basic and interactive driving information, but traditional methods using multiple picture generation units (PGUs) are costly and less reliable.
- To address this challenge, the proposed solution integrates a single PGU with a curved mirror that creates two focal planes by optically relaying one of the output areas.
- The final design achieves high image quality across specified eyepoints and has been successfully fabricated into a compact 8.5 L AR HUD for experimental testing.
Article 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.
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| http://dx.doi.org/10.1364/AO.58.005366 | DOI Listing |
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