实现高速全彩全息成像，单次拍摄还原高保真彩色图像。
HoloTile RGB: Ultra-fast single-shot, discretized, full-color computer-generated phase-only holography
- 分块全息叠加+点扩散函数调制，实现伪数字像素输出。
- 每波长8位相位调制，60Hz刷新，单帧捕获彩色图像。
- 适用于任意波长组合，适合高速多波段成像应用。
我们首次将HoloTile计算全息技术应用于多波长目标。利用子全息图拼接和点扩散函数（PSF）调控，无需时间平均即可重建高保真、伪数字的多波长图像，输出像素离散且定义清晰。各波长通道按比例缩放，保持相同输出像素尺寸。采用随机梯度下降（SGD）算法为每个波长生成全息图，并在HoloEye GAEA 2.1空间光调制器上以颜色场顺序（CFS）相位调制模式依次显示。实现每波长60Hz下8位相位调制。重构图像投射至相机传感器，每个RGB图像在单次曝光中捕获。该方法展现出色彩还原效果，可适配任意波长组合，适用于多种多波长应用场景。
原文摘要 · Abstract (English)
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.
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