HoloTile RGB: Ultra-fast single-shot, discretized, full-color computer-generated phase-only holography
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| author | Madsen, Andreas Erik Gejl Glückstad, Jesper |
| author_facet | Madsen, Andreas Erik Gejl Glückstad, Jesper |
| contents | We demonstrate the first use of the HoloTile Computer-Generated Holography (CGH) modality on multi-wavelength targets. Taking advantage of the sub-hologram tiling and Point Spread Function (PSF) shaping of HoloTile allows for reconstruction of high-fidelity, pseudo-digital multi-wavelength images, with well-defined discrete output pixels, without the need for temporal averaging. For each wavelength, the target channels are scaled appropriately, using the same output pixel size. We employ a stochastic gradient descent (SGD) hologram generation algorithm for each wavelength, and display them sequentially on a HoloEye GAEA 2.1 Spatial Light Modulator (SLM) in Color Field Sequential (CFS) phase modulation mode. As such, we get full 8-bit phase modulation at 60 Hz for each wavelength. The reconstructions are projected onto a camera sensor where each RGB image is captured in a single shot. While these show impressive color reconstructions, the method can be adapted to any wavelength combination for use in a plethora of multi-wavelength application. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_11049 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | HoloTile RGB: Ultra-fast single-shot, discretized, full-color computer-generated phase-only holography Madsen, Andreas Erik Gejl Glückstad, Jesper Optics Image and Video Processing We demonstrate the first use of the HoloTile Computer-Generated Holography (CGH) modality on multi-wavelength targets. Taking advantage of the sub-hologram tiling and Point Spread Function (PSF) shaping of HoloTile allows for reconstruction of high-fidelity, pseudo-digital multi-wavelength images, with well-defined discrete output pixels, without the need for temporal averaging. For each wavelength, the target channels are scaled appropriately, using the same output pixel size. We employ a stochastic gradient descent (SGD) hologram generation algorithm for each wavelength, and display them sequentially on a HoloEye GAEA 2.1 Spatial Light Modulator (SLM) in Color Field Sequential (CFS) phase modulation mode. As such, we get full 8-bit phase modulation at 60 Hz for each wavelength. The reconstructions are projected onto a camera sensor where each RGB image is captured in a single shot. While these show impressive color reconstructions, the method can be adapted to any wavelength combination for use in a plethora of multi-wavelength application. |
| title | HoloTile RGB: Ultra-fast single-shot, discretized, full-color computer-generated phase-only holography |
| topic | Optics Image and Video Processing |
| url | https://arxiv.org/abs/2409.11049 |