A 32×32 Pixel 0.46-to-0.75THz Light-Field Camera SoC in 0.13μ m CMOS

A 32×32 Pixel 0.46-to-0.75THz Light-Field Camera SoC in 0.13μ m CMOS
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采用 0 13μ m CMOS 的 32×32 像素 0 46-to 0 75THz 光场相机 SoC

DOI:
10.1109/isscc42613.2021.9365832
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发表时间:
2021
期刊:
2021 IEEE International Solid- State Circuits Conference (ISSCC)
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通讯作者:
R. Jain
R. Jain
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作者:
R. Jain

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光场(LF)是指在空间中的空间方向性的光流。在LF成像中,沿着沿着不同的位置和方向记录光线,并且利用反向传播重建3D场景[1]。现代可见光LF相机在兆像素(Mpx)计数焦平面阵列(FPA)顶部组装一个透镜阵列,以便每个透镜(宏像素)提供空间采样,而透镜内的焦平面像素(子像素)提供角度采样[2]。同样,THz LF相机可以实现实时3D透视成像,用于检查和筛选应用[3]。不幸的是,太赫兹Mpx FPA是不可行的,因为大的太赫兹像素面积(>10×可见光像素)将需要晶圆级FPA制造,导致不切实际的成本和工艺变化。多芯片封装是扩展THz FPA像素数的替代方案,但它需要具有串行数据接口(小引脚数)的紧凑型THz相机IC,以实现密集集成。
Light-field (LF) refers to the spatio-directional light flow in space. In LF imaging, light rays are recorded along different positions and directions, and a 3-D scene is reconstructed with back-propagation [1]. Modern visible-light LF cameras assemble a lens array atop a megapixel (Mpx) count focal-plane array (FPA), such that each lens (macro-pixel) provides spatial sampling while the FPA pixels within a lens (sub-pixels) provide angular sampling [2]. Likewise, THz LF cameras can allow real-time 3D see-through imaging for inspection and screening applications [3]. Unfortunately, THz Mpx FPAs are infeasible as a large THz pixel area (>10× visible-light pixel) would require wafer-scale FPA fabrication, leading to impractical costs and process variations. Multi-chip packaging is an alternative for scaling the THz FPA pixel count, but it requires compact THz camera ICs with serial data interfaces (small pin count) to allow dense integration.
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