Holographic waveguide head-up display with 2-D pupil expansion and longitudinal image magnification
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CraigTDraper_revisedfinal.pdf
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Final Accepted Manuscript
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OPTICAL SOC AMERCitation
Draper, C. T., Bigler, C. M., Mann, M. S., Sarma, K., & Blanche, P. A. (2019). Holographic waveguide head-up display with 2-D pupil expansion and longitudinal image magnification. Applied Optics, 58(5), A251-A257.Journal
APPLIED OPTICSRights
© 2019 Optical Society of America.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
Head-up displays (HUDs) are used in aircraft to overlay relevant flight information on the vehicle’s externals for pilots to view with continued focus on the far field. In these systems, the field of view (FOV) is traditionally limited by the size of the projection optics. Though classical HUD systems take a significant amount of space in the flight deck, they have become a necessity in avionic transportation. Our research aims to reduce the size of the HUD footprint while offering a wide FOV projected in the far field with an expanded pupil. This has been accomplished by coupling the image-bearing light into a waveguide under total internal reflection conditions, redirecting that light in the orthogonal direction, and then outcoupling the light toward the pilot. Each step was achieved using holographic optical elements. The injection hologram has optical power to obtain longitudinal magnification, whereas the redirection hologram expands the pupil in one dimension and the extraction hologram expands the pupil in a second dimension. Varying diffraction efficiency along the direction of the light propagation ensures even image intensity throughout the expanded pupil. We used ray tracing optical simulations to optimize the design of the system and present a fully operational demonstrator of the HUD. This HUD produces an image with a FOV of 24°×12.6° at a viewing distance of 4.5 in. (114 mm) from the waveguide, with infinite longitudinal magnification and 1.9× by 1.6× horizontal and vertical pupil expansion, respectively.Note
12 month embargo; posted 2 January 2019ISSN
1559-128X2155-3165
Version
Final accepted manuscriptSponsors
Honeywell International Inc. [6400282571, 6400327460, 6400368337]; National Science Foundation (NSF) Arizona TRIF program; Western Alliance to Expand Student Opportunities [f18ur041/f2018ur0052]; REU IOU-NA program [EEC-0812072, EEC-1659510, IIP-1640329]; Technology Research Initiative FundingAdditional Links
https://www.osapublishing.org/abstract.cfm?URI=ao-58-5-A251ae974a485f413a2113503eed53cd6c53
10.1364/AO.58.00A251