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2013 | OriginalPaper | Chapter

SPAD-Based Sensors

Authors : Edoardo Charbon, Matt Fishburn, Richard Walker, Robert K. Henderson, Cristiano Niclass

Published in: TOF Range-Imaging Cameras

Publisher: Springer Berlin Heidelberg

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Abstract

3D imaging and multi-pixel rangefinding constitute one of the most important and innovative fields of research in image sensor science and engineering in the past years. In rangefinding, one computes the Time-Of-Flight of a ray of light, generated by a mono-chromatic or wide-spectral source, from the source through the reflection of a target object and to a detector. There exist at least two techniques to measure the Time-Of-Flight (TOF): a direct and an indirect technique. In direct techniques (D-TOF), the time difference between a START pulse, synchronized with the light source, and a STOP signal generated by the detector is evaluated. In indirect techniques (I-TOF), a continuous sinusoidal light wave is emitted and the phase difference between outgoing and incoming signals is measured. From the phase difference, the time difference is derived using well-known formulae.
Footnotes
1
The preposition “above” is used because researchers working with APDs consider the cathode to be the terminal with the higher voltage.
 
2
Termed after the similarity to a Geiger counter.
 
3
PDE is defined as the multiplication of fill facto and PDP.
 
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Metadata
Title
SPAD-Based Sensors
Authors
Edoardo Charbon
Matt Fishburn
Richard Walker
Robert K. Henderson
Cristiano Niclass
Copyright Year
2013
Publisher
Springer Berlin Heidelberg
DOI
https://doi.org/10.1007/978-3-642-27523-4_2

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