Journal
OPTICS EXPRESS
Volume 27, Issue 2, Pages 1683-1692Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.001683
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Funding
- National Natural Science Foundation of China (NSFC) [61575024, 61420106014]
- UK Government's Newton Fund
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The contradiction between the field of view (FOV). luminance uniformity (LU) and weight has always restricted the development of augmented reality display systems. An on-axis near-eye display (NED) system based on directional scattering holographic waveguide (DSHW) and curved goggle is proposed in order to realize a large FOV with high LU, light weight. and conformal design capability. The DSHW which consists of a linear volume holographic grating and holographic diffuser is used to deliver the virtual image and construct a transparent directional emission display screen with high LU. The curved goggle is used to project the image on the display screen into human eye and form a large FOV, with a suitable exit pupil diameter (EPD) and eye relief distance (ERF) and while keeping the external scene visible. Our proposed NED achieved an FOV of 44 degrees horizontal (H) x 12 degrees vertical (V) easily, which is almost consistent with the theoretical design. The EPD is 6 mm, ERF is 18.6 mm. and LU is about 88.09% at full viewing angle. The system is lightweight and flexible, which can be further applied in the nem-generation, integrated protection-display helmet system through conformal optical design. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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