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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.20376 |
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| _version_ | 1866912854465052672 |
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| author | Cerioni, Alessandro Trezzi, Samuele Astarita, Marco Ongarello, Tommaso Cesaratto, Anna Cerullo, Giulio Bassi, Andrea Valentini, Gianluca Pozzi, Paolo |
| author_facet | Cerioni, Alessandro Trezzi, Samuele Astarita, Marco Ongarello, Tommaso Cesaratto, Anna Cerullo, Giulio Bassi, Andrea Valentini, Gianluca Pozzi, Paolo |
| contents | We introduce a novel interferometric approach for suppressing zero-order diffraction (ZOD) in phase-only computer-generated holography. The technique relies on the destructive interference between the zeroth-order light and a suppression beam in a plane optically conjugated to the spatial light modulator (SLM). A camera-in-the-loop (CITL) calibration procedure retrieves the optimal pixel-wise phase map that cancels out the ZOD component with high precision, while preserving the full modulation depth of the SLM. Experimental demonstrations on point-cloud and 2D/3D holograms achieve up to 99% suppression of the ZOD intensity, without loss of image quality or field of view. Once calibrated, the correction can be applied to any hologram without recomputation, enabling real-time operation and robust performance over time. This method removes a long-standing barrier to the practical deployment of full-field holography, facilitating the development of compact, high-fidelity holographic engines for augmented and mixed reality displays. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_20376 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Zero-Order Diffraction Suppression in Full Field-of-View Computer Generated Holography: A Camera In the Loop Interferometric Approach Cerioni, Alessandro Trezzi, Samuele Astarita, Marco Ongarello, Tommaso Cesaratto, Anna Cerullo, Giulio Bassi, Andrea Valentini, Gianluca Pozzi, Paolo Optics Applied Physics We introduce a novel interferometric approach for suppressing zero-order diffraction (ZOD) in phase-only computer-generated holography. The technique relies on the destructive interference between the zeroth-order light and a suppression beam in a plane optically conjugated to the spatial light modulator (SLM). A camera-in-the-loop (CITL) calibration procedure retrieves the optimal pixel-wise phase map that cancels out the ZOD component with high precision, while preserving the full modulation depth of the SLM. Experimental demonstrations on point-cloud and 2D/3D holograms achieve up to 99% suppression of the ZOD intensity, without loss of image quality or field of view. Once calibrated, the correction can be applied to any hologram without recomputation, enabling real-time operation and robust performance over time. This method removes a long-standing barrier to the practical deployment of full-field holography, facilitating the development of compact, high-fidelity holographic engines for augmented and mixed reality displays. |
| title | Zero-Order Diffraction Suppression in Full Field-of-View Computer Generated Holography: A Camera In the Loop Interferometric Approach |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2601.20376 |