Related Experiment Video
Updated: Aug 15, 2026
06:25
Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
Published on: February 12, 2014
Fast SPAD-array timing-error correction with time-referencing for non-line-of-sight imaging
Optics Express
|August 14, 2026
Summary
This study introduces a fast algorithm to fix timing errors in single-photon counting detectors. It improves temporal alignment and enables more accurate non-line-of-sight reconstructions without external calibration.
Area of Science:
- Photonics and Optical Engineering
- Instrumentation and Measurement Science
Background:
- Manufacturing variations in SPAD arrays cause pixel-dependent timing errors.
- These errors lead to temporal broadening, degrading signal reconstruction accuracy.
Purpose of the Study:
- To develop a fast calibration and correction algorithm for TCSPC timing errors.
- To improve temporal alignment and accuracy in NLOS reconstructions using SPAD arrays.
Main Methods:
- A pre-computed lookup table equalizes pixel-dependent time-bin widths.
- An absolute time reference is established using intrinsic LOS signal features for NLOS reconstruction.
Main Results:
- The algorithm effectively compensates for pixel-dependent timing variations.
- Improved temporal alignment was demonstrated in experimental and simulated data.
- Accurate non-line-of-sight reconstructions were achieved without external calibration.
Conclusions:
- The developed algorithm offers a robust solution for timing errors in SPAD-based TCSPC.
- It enhances the accuracy of temporal measurements and NLOS imaging.
- The method eliminates the need for complex external calibration procedures.
Related Concept Videos
01:14NMR Spectrometers: Resolution and Error Correction
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
01:26Errors in Global Positioning System
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...