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Multiplexed Holographic Combiner with Extended Eye Box Fabricated by Wave Front Printing

Wilm, Tobias 1; Kibgies, Jens; Fiess, Reinhold; Stork, Wilhelm 1
1 Institut für Technik der Informationsverarbeitung (ITIV), Karlsruher Institut für Technologie (KIT)

Abstract:

We present an array-based volume holographic optical element (vHOE) recorded as an optical combiner for novel display applications such as smart glasses. The vHOE performs multiple, complex optical functions in the form of large off-axis to on-axis wave front transformations and an extended eye box implemented in the form of two distinct vertex points with red and green chromatic functions. The holographic combiner is fabricated by our extended immersion-based wave front printing setup, which provides extensive prototyping capabilities due to independent wave front modulation and large possible off-axis recording angles, enabling vHOEs in reflection with a wide range of different recording configurations. The presented vHOE is build up as an array of sub-holograms, where each element is recorded with individual optical functions. We introduce a design and fabrication method to combine two angular and two spectral functions in the volume grating of individual sub-holograms, demonstrating complex holographic elements with four multiplexed optical functions comprised in a single layer of photopolymer film. The introduced design and fabrication process allows the precise tuning of the vHOE’s diffractive properties to achieve well-balanced diffraction efficiencies and angular distributions between individual multiplexed functions.


Verlagsausgabe §
DOI: 10.5445/IR/1000156502
Veröffentlicht am 06.03.2023
Originalveröffentlichung
DOI: 10.3390/photonics9060419
Scopus
Zitationen: 4
Web of Science
Zitationen: 2
Dimensions
Zitationen: 4
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technik der Informationsverarbeitung (ITIV)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 15.06.2023
Sprache Englisch
Identifikator ISSN: 2304-6732
KITopen-ID: 1000156502
Erschienen in Photonics
Verlag MDPI
Band 9
Heft 6
Seiten Art.-Nr.: 419
Schlagwörter holography, holographic optical elements, volume hologram, Bragg grating, multiplexing, wave front recording, spatial light modulator, combiner, augmented reality
Nachgewiesen in Web of Science
Dimensions
Scopus
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