Eye-box expanded lens-less holographic near-eye display based on single spatial light modulator and holographic optical element

Erkhembaatar Dashdavaa; Munkh-Uchral Erdenebat; F. M. Fahmid Hossain; Hui-Ying Wu; Ki-Chul Kwon; Kwon-Yeon Lee; Nam Kim

doi:10.1117/12.3002500

13 March 2024 Eye-box expanded lens-less holographic near-eye display based on single spatial light modulator and holographic optical element

Erkhembaatar Dashdavaa, Munkh-Uchral Erdenebat, F. M. Fahmid Hossain, Hui-Ying Wu, Ki-Chul Kwon, Kwon-Yeon Lee, Nam Kim

Author Affiliations +

Proceedings Volume 12910, Practical Holography XXXVIII: Displays, Materials, and Applications; 129100G (2024) https://doi.org/10.1117/12.3002500
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

In this paper, we expand the eyebox size of lens-less holographic near-eye-display (NED) using passive eyebox replication technique that incorporates the spatial light modulator (SLM) and a holographic optical element (HOE). In holographic NEDs, the space-bandwidth product (SBP) of the SLM determines the exit pupil dimensions and corresponding eyebox size. The base eyebox is replicated in horizontal direction by using the horizontal high-order diffractions of the SLM under spherical wave illumination and multiplexed HOE combiner. The HOE combiner is used as a see-through reflective screen for the projected holographic virtual image, and it is fabricated based on two spherical divergent waves recording condition. When a digital blazed grating and a digital lens phase are added to the computed phase hologram sent to the SLM, two spatially separated, horizontal high-order diffraction terms with identical intensity and information can be used for eyebox expansion. When the eyebox size is expanded, the field-of-view (FOV) is not sacrificed; spherical divergence wave illumination alleviates the need for a tradeoff between FOV and eyebox size. Astigmatism distortion introduced during the HOE fabrication was counterbalanced by pre-correcting the target image using a computer-generated, holographic computation algorithm. The experimental results prove that the proposed prototype system is simple and effective to achieve distortion-free reconstruction of 3D virtual image and eyebox extension of lens less holographic NED.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Erkhembaatar Dashdavaa, Munkh-Uchral Erdenebat, F. M. Fahmid Hossain, Hui-Ying Wu, Ki-Chul Kwon, Kwon-Yeon Lee, and Nam Kim "Eye-box expanded lens-less holographic near-eye display based on single spatial light modulator and holographic optical element", Proc. SPIE 12910, Practical Holography XXXVIII: Displays, Materials, and Applications, 129100G (13 March 2024); https://doi.org/10.1117/12.3002500

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available