论文标题
被动微米尺度的飞行时间与阳光干涉法
Passive Micron-scale Time-of-Flight with Sunlight Interferometry
论文作者
论文摘要
我们引入了一种干涉技术，用于在微米轴向分辨率下进行被动飞行时间的成像和深度感测。我们的技术使用全场米歇尔森干涉仪，修改后将阳光用作唯一的光源。阳光的较大光谱带宽使得通过简单的轴向扫描操作获得微米分辨率的时间分辨场景响应。此外，阳光的角度带宽使得捕获飞行时间测量值对间接照明效应不敏感，例如反射和地下散射。我们构建了一个实验性原型，该原型在户外，在阳光直射的情况下操作，并在不利的环境条件下（例如机器振动和车辆交通）。我们首次使用该原型来证明被动成像功能，例如微米尺度的深度感知可靠的，以通过扩散器进行间接照明，直接成像和成像。
We introduce an interferometric technique for passive time-of-flight imaging and depth sensing at micrometer axial resolutions. Our technique uses a full-field Michelson interferometer, modified to use sunlight as the only light source. The large spectral bandwidth of sunlight makes it possible to acquire micrometer-resolution time-resolved scene responses, through a simple axial scanning operation. Additionally, the angular bandwidth of sunlight makes it possible to capture time-of-flight measurements insensitive to indirect illumination effects, such as interreflections and subsurface scattering. We build an experimental prototype that we operate outdoors, under direct sunlight, and in adverse environment conditions such as machine vibrations and vehicle traffic. We use this prototype to demonstrate, for the first time, passive imaging capabilities such as micrometer-scale depth sensing robust to indirect illumination, direct-only imaging, and imaging through diffusers.
