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Graph."],"published-print":{"date-parts":[[2023,8]]},"abstract":"<jats:p>In this paper, we present a novel method the \u00e9tendue expansion of near-eye holographic displays through the generation of a sparse eye-box. Conventional holographic near-eye displays have suffered from narrow field of view or narrow eye-box due to the limited \u00e9tendue supported by a spatial light modulator. We focus on the fact that these displays typically form a dense eye-box, which could be an excessive investment of the limited \u00e9tendue. By rearranging the eye-box in a sparse manner, the practical \u00e9tendue can be extended. With a properly designed sparse eye-box shape, it can provide the 3D holographic images and ensure continuous light entrance to the pupil. To create a sparse eye-box, we utilize a lens array as an eyepiece lens. We optimize the spatial light modulator's phase profile for the proposed system and analyze the impact of the use of the lens array eyepiece on the holographic image quality. In particular, we focus on the lens array specification of the lenslet pitch and the focal length, deriving feasible specifications based on our analysis. We experimentally demonstrate a near eye see-through display using the proposed system and verify the \u00e9tendue expansion.<\/jats:p>","DOI":"10.1145\/3592441","type":"journal-article","created":{"date-parts":[[2023,7,26]],"date-time":"2023-07-26T14:29:21Z","timestamp":1690381761000},"page":"1-13","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":20,"title":["\u00c9tendue Expansion in Holographic Near Eye Displays through Sparse Eye-box Generation Using Lens Array Eyepiece"],"prefix":"10.1145","volume":"42","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8693-1700","authenticated-orcid":false,"given":"Minseok","family":"Chae","sequence":"first","affiliation":[{"name":"Seoul National University, Seoul, South Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7019-2798","authenticated-orcid":false,"given":"Kiseung","family":"Bang","sequence":"additional","affiliation":[{"name":"Seoul National University, Seoul, South Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8404-1947","authenticated-orcid":false,"given":"Dongheon","family":"Yoo","sequence":"additional","affiliation":[{"name":"Seoul National University, Seoul, South Korea"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9554-4438","authenticated-orcid":false,"given":"Yoonchan","family":"Jeong","sequence":"additional","affiliation":[{"name":"Seoul National University, Seoul, South Korea"}]}],"member":"320","published-online":{"date-parts":[[2023,7,26]]},"reference":[{"key":"e_1_2_2_1_1","volume-title":"Neural\\' {E} tendue Expander for Ultra-Wide-Angle High-Fidelity Holographic Display. arXiv preprint arXiv:2109.08123","author":"Baek Seung-Hwan","year":"2021","unstructured":"Seung-Hwan Baek, Ethan Tseng, Andrew Maimone, Nathan Matsuda, Grace Kuo, Qiang Fu, Wolfgang Heidrich, Douglas Lanman, and Felix Heide. 2021. 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