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Abstract:
We present a method for expanding the eye-box in retinal projection augmented reality (AR) near-eye displays using an off-axis metalens. Retinal projection is capable of maintaining clear virtual images over a broad depth of field; however, the small eye-box posesa challenge in practical applications. Here, we designed an off-axis meta-lens with a working wavelength of 633 nm, a radius of 12.5μm, and a focal point at coordinates (5, 0, 30) to compensate for the retinal projection's viewpoint. The designed module is position edanterior to the human eye, and light passing through the off-axismeta-lens is focused onto the plane of the pupil. We can also design an off-axis meta-lens with a displacement along the y-axis to achieve two-dimensional pupil expansion. Finally, using a Gaussian light source within the FDTD (Finite-Difference Time-Domain) software, we constructed an 'H' pattern as the light source. After passing through the designed off-axis meta-lens, the 'H' pattern forms an image magnified by a factor of two at twice the focal length, with a horizontal deviation of 10 μm from the center, which meets the design specifications. © 2025, John Wiley and Sons Inc. All rights reserved.
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ISSN: 0097-966X
Year: 2025
Issue: S1
Volume: 56
Page: 973-975
Language: English
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SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
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Chinese Cited Count:
30 Days PV: 3
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