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JSSC 2019第11期Power Management

A 512-Pixel 51-kHz-Frame-Rate Dual-Shank Lens-Less Filter-Less Si ngle-Photon Av

提出一种植入式单光子成像器，集成于单芯片CMOS，具有512像素和51kHz帧率。
512像素, 51kHz帧率, 3.4mm×600µm×400µm成像范围
单光子成像CMOS集成植入式无透镜时间门控
▸创新点1：双柄无透镜无滤光片设计，通过去除传统光学元件，显著减小系统体积，实现最小侵入式植入，适用于高密度神经成像应用。
▸创新点2：时间门控角度敏感检测系统，替代传统光学滤波和聚焦元件，通过时间门控技术实现高精度光子检测，提升系统灵敏度和分辨率。
▸创新点3：3D荧光源位置计算重建，利用计算成像算法在3.4 mm × 600 µm × 400 µm体积内精确重建荧光源位置，实现高空间分辨率的3D成像。
▸创新点4：单片CMOS集成512个单光子雪崩二极管，结合6位深度像素内存储器和片上数字时间转换器，实现高帧率（51 kHz）和高动态范围成像。
Abstract
We present an implantable single-photon shank- based imager, monolithically integrated onto a single CMOS IC. The imager comprises of 512 single-photon avalanche diodes distributed along two shanks, with a 6-bit depth in-pixel memory and an on-chip digital-to-time converter. To scale down the system to a minimally invasive form factor, we substitute optical filtering and focusing elements with a time-gated, angle-sensitive detection system. The imager computationally reconstructs the position of