Abstract
The development of single-photon counting detectors and arrays has made tremendous steps in recent years, not the least because of various new applications, e.g., LIDAR devices. In this work, a 3D imaging device based on real thermal light intensity interferometry is presented. By using gated SPAD technology, a basic 3D scene is imaged in reasonable measurement time. Compared to conventional approaches, the proposed synchronized photon counting allows the use of more light modes to enhance 3D ranging performance. Advantages like robustness to atmospheric scattering or autonomy by exploiting external light sources can make this ranging approach interesting for future applications.
Highlights
We propose a novel photon counting technique, synchronizing the two single-photon avalanche diode (SPAD) detectors by using gated SPAD technology in order to leverage the performance of our 3D imaging intensity interferometer
In this paper we introduce an intensity interferometry-based device that only uses the inherent fluctuations of real thermal light to perform time-offlight imaging and measure the topography of a real 3D object
In order to leverage the performance of our 3D imaging intensity interferometer, we propose a novel photon counting technique, synchronizing the two SPAD detectors by using gated SPAD technology
Summary
A. Main contributions The following bullet points highlight our main contributions:. To the best of our knowledge, we are the first to build a 3D imaging system based on intensity interferometry only using a thermal light source. We present a first example scan, 3D imaging a basic scene with a depth resolution of ∆d = 1.7 mm. Our system can achieve sub-millimeter depth precision (∆d = 0.3 mm is experimentally demonstrated), independently from the standoff distance. We propose a novel photon counting technique, synchronizing the two SPAD detectors by using gated SPAD technology in order to leverage the performance of our 3D imaging intensity interferometer. The approach improves our acquisition time by a factor > 2
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