Abstract
An augmented reality (AR) near-eye display using Pancharatnam-Berry (PB) phase lenses is proposed. PB phase lenses provide different optical effects depending on the polarization state of the incident light. By exploiting this characteristic, it is possible to manufacture an AR combiner with a small form factor and a large numerical aperture value. The AR combiner adopted in the proposed system operates as a convex lens for right-handed circularly polarized light and operates as transparent glass for left-handed circularly polarized light. By merging this combiner with a transparent screen, such as diffuser-holographic optical elements (DHOEs), it is possible to make an AR near-eye display with a small form factor and a wide field of view. In addition, the proposed AR system compensates the chromatic aberration that occurs in PB phase lens by adopting three-layered DHOEs. The operating principle of the proposed system is covered, and its feasibility is verified with experiments and analysis.
Highlights
Augmented reality (AR) near-eye displays have been in the limelight for the past few years
One linear polarizer is attached behind the LDHOEs, and the other is placed in front of the laser projector
A quarter wave plate (QWP) is located between the PBLIC and LDHOEs to modulate the polarization states
Summary
Augmented reality (AR) near-eye displays have been in the limelight for the past few years. Meta Company released an AR display named Meta 2 to the commercial market[1] This device provides a 90-degree field of view (FOV) using a freeform half-mirror. If HOE or DOE lenses are used as imaging optics, severe astigmatism occurs[15] To avoid this issue, HOEs or DOEs have been applied to provide a Maxwellian view or holography in several studies, but these systems require additional cost to achieve a sufficient eye box[16,17]. There have been studies related to AR combiners using polarization characteristics to achieve high numerical aperture (NA), such as an anisotropic lens or a metasurface lens[18,19] These systems represent full-color virtual images with a sufficient FOV by adopting the polarization multiplexing method. A detailed explanation of the system and experimental results are covered
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