Cruz, Maria-Luisa

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Wide-angle color holographic near eye display with full bandwidth frequency multiplexing
(Springer Science and Business Media LLC, 2025-04-30)
Maksymilian Chlipala
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Cruz, Maria-Luisa
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Juan Martinez-Carranza
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Moncy Idicula
;
Rafal Kukolowicz
<jats:title>Abstract</jats:title> <jats:p>Wide-angle holographic near-eye displays (HNEDs) face challenges in achieving high frame rates, full-color, high-resolution images, and shallow depth of field. Existing full-color methods either rely on time multiplexing or suffer from reduced image resolution due to the applied filtering of the available spatial bandwidth of the light modulator. To address these limitations, we propose a non-pupil HNED system that reconstructs large 3D full-color scenes from a single hologram using RGB LED illumination. The non-pupil architecture allows employing an incoherent LED source, which offers reduced speckle noise and high imaging resolution. This is, to our knowledge, the first wide-angle 3D color holographic display to use a single spatial light modulator (SLM) at full frame rate. Our system is supported by a developed computer generation hologram (CGH) method, which maximizes the SLM’s bandwidth for color coding and improves the speed of RGB CGH calculations. Additionally, we introduce a frequency filter design to simplify color coding and illumination alignment. Through optical reconstructions, we demonstrate that our method preserves 3D depth and color distribution, achieving high-resolution color holographic video without compromising refresh rate or hologram bandwidth.</jats:p>
15
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Multi-view computer-generated hologram for display projection using Fourier and spatial domain segmentation
(2022)
Cruz, Maria-Luisa
2 37
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In-line cell-phone holographic microscope using plane wave illumination and an iterative algorithm
(2023)
Cruz, Maria-Luisa
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Mariana Martínez-Márquez
;
Luis Torres-Plumarejo
<jats:p>We propose an in-line cell-phone holographic microscope in combination with an iterative algorithm to retrieve the complex field of microscopic samples with high resolution at low cost.</jats:p>
23
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Local zoom issue in holographic 3D display
(IOP Publishing, 2026-07-20)
Wang, Fan
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Starobrat, Joanna
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Wang, Yujie
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Goto, Masato
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Udjaja, Yogi
In near-eye displays such as AR/VR, users often utilize gesture recognition to selectively zoom into regions of interest for detailed observation of local scenes. If the scene is reconstructed from a hologram, zooming in on the scene requires scaling the original hologram. However, scaling a hologram inevitably leads to depth distortion, which causes the reconstructed scene to shift from its original focal plane. A brute-force solution is to re-calculate the hologram from the scaled raw data (e.g. RGB-D data), but this is computationally prohibitive for the real-time interactive scaling expected in near-eye displays. In this paper, we propose a concise and efficient second-pass propagation method. Based on the theoretical relationship between the scaling ratio and depth distortion, the proposed method restores the scaled hologram to its original depth, enabling depth-preserved scaling display. Since the compensation is performed directly on existing holograms without requiring full re-calculation, this method is computationally lightweight and ideally suited for the demands of real-time interaction. Both simulations and optical experiments were conducted on holograms generated by various algorithms. The results confirm the inherent issues of conventional hologram scaling and verify the effectiveness of our proposed method. © 2026 The Author(s). Published by IOP Publishing Ltd. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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Simple method for hologram multiplexing using vertical interlacing
(2024-01-01)
Cruz, Maria-Luisa
;
Tomasz Kozacki
12
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Phase retrieval from two-plane holograms with unknown separation distance in a portable digital holographic microscope
(Optica Publishing Group, 2025)
Cruz, Maria-Luisa
;
Montoya Marzquez, Orlando
11
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Full image reconstruction with reduced speckle noise, from a partially illuminated Fresnel hologram, using a structured random phase
(2019)
Cruz, Maria-Luisa
Scopus© Citations 10 1 4
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High-quality 3D image display using a low-resolution spatial light modulator in phase and amplitude mode.
(Optica Publishing Group, 2025)
Cruz, Maria-Luisa
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Gilardi Velázquez, Héctor Eduardo
14
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Engagement in a Virtual Reality Game with Gesture Hand Interface. An Empirical Evaluation of User Engagement Scale (UES)
(2017)
Landa-Avila, Irma Cecilia
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Cruz, Maria-Luisa
Scopus© Citations 7 2 6
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Autonomous generation of extended images of dynamic phase objects in a depth volume sample using a simple focusing criterion and K-means clustering
(2017)
Cruz, Maria-Luisa
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Alcaraz Rivera, Miguel
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Pinhas Girshovitz
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Natan T. Shaked
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Bahram Javidi
1 8

Cruz, Maria-Luisa

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