Abstract

Multispectral and 3-D imaging are useful for a wide variety of applications, adding valuable spectral and depth information for image analysis. Single-photon avalanche diode (SPAD) based imaging systems provide photon time-of-arrival information, and can be used for imaging with time-correlated single photon counting techniques. Here we demonstrate an LED based synchronised illumination system, where temporally structured light can be used to relate time-of-arrival to specific wavelengths, thus recovering reflectance information. Cross-correlation of the received multi-peak histogram with a reference measurement yields a time delay, allowing depth information to be determined with cm-scale resolution despite the long sequence of relatively wide (~10 ns) pulses. Using commercial LEDs and a SPAD imaging array, multispectral 3-D imaging is demonstrated across 9 visible wavelength bands.
LanguageEnglish
Pages35485-35498
Number of pages14
JournalOptics Express
Volume27
Issue number24
DOIs
Publication statusPublished - 25 Nov 2019

Fingerprint

light emitting diodes
avalanche diodes
photons
arrivals
image analysis
histograms
wavelengths
cross correlation
counting
time lag
illumination
reflectance
pulses

Keywords

  • SPAD
  • light-emitting diode
  • imaging
  • time-of-flight

Cite this

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title = "Multispectral time-of-flight imaging using light-emitting diodes",
abstract = "Multispectral and 3-D imaging are useful for a wide variety of applications, adding valuable spectral and depth information for image analysis. Single-photon avalanche diode (SPAD) based imaging systems provide photon time-of-arrival information, and can be used for imaging with time-correlated single photon counting techniques. Here we demonstrate an LED based synchronised illumination system, where temporally structured light can be used to relate time-of-arrival to specific wavelengths, thus recovering reflectance information. Cross-correlation of the received multi-peak histogram with a reference measurement yields a time delay, allowing depth information to be determined with cm-scale resolution despite the long sequence of relatively wide (~10 ns) pulses. Using commercial LEDs and a SPAD imaging array, multispectral 3-D imaging is demonstrated across 9 visible wavelength bands.",
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author = "Griffiths, {Alexander D.} and Haochang Chen and Li, {David Day-Uei} and Henderson, {Robert K.} and Johannes Herrnsdorf and Dawson, {Martin D.} and Strain, {Michael J.}",
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AU - Dawson, Martin D.

AU - Strain, Michael J.

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