Multiple wavelength time-of-flight sensor based on time-correlated single-photon counting

2005 ◽  
Vol 76 (8) ◽  
pp. 083112 ◽  
Author(s):  
Gerald S. Buller ◽  
Ross D. Harkins ◽  
Aongus McCarthy ◽  
Philip A. Hiskett ◽  
Gordon R. MacKinnon ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Time Of Flight ◽  
Single Photon Counting ◽  
Multiple Wavelength

Time-of-flight range profiling using time-correlated single-photon counting

2007 ◽  
Author(s):  
Lars Sjöqvist ◽  
Markus Henriksson ◽  
Per Jonsson ◽  
Ove Steinvall
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Time Of Flight ◽  
Single Photon Counting ◽  
Flight Range

scholarly journals Subcentimeter depth resolution using a single-photon counting time-of-flight laser ranging system at 1550 nm wavelength

2007 ◽  
Vol 32 (15) ◽  
pp. 2266 ◽  
Author(s):  
Ryan E. Warburton ◽  
Aongus McCarthy ◽  
Andrew M. Wallace ◽  
Sergio Hernandez-Marin ◽  
Robert H. Hadfield ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Time Of Flight ◽  
Depth Resolution ◽  
Laser Ranging ◽  
Single Photon Counting ◽  
Counting Time

Three-Dimensional Laser Imaging in an Archaeological Context

2005 ◽  
Author(s):  
Andrew M. Wallace
Keyword(s):  
Laser Beam ◽  
Laser Scanning ◽  
Single Photon ◽  
Photon Counting ◽  
Three Dimensional ◽  
Time Of Flight ◽  
Attractive Alternative ◽  
Laser Imaging ◽  
Single Photon Counting ◽  
Measured Time

This chapter discusses the strengths and weaknesses of techniques of 3D laser imaging based on time of flight and triangulation. Laser scanning by triangulation is a fully developed technology. Through this method, it is now possible to create faithful 3D datasets from a reasonable range of surface materials. However, laser scanning has some certain drawbacks, restricting their universal applicability. For surfaces with concavities or with intricate details, occlusion may occur due to the necessary separation of the viewpoint between the viewing camera and the laser projector. In addition, the data may be corrupted by false and poor returns caused by variable material reflectance. In the time of flight system, the distance is measured by measuring the time for a focused laser beam to impact on and return from the surface of interest. In this method, the distance is computed and a 3D image can be created if the laser beam is scanned across the target. Although, the time of flight method is a more attractive alternative as it eliminates occlusion, it has disadvantages as well. The time resolution necessary to measure the range to sub-millimetre accuracy is difficult to achieve and the measured time is also affected by the magnitude of the returned signal. In addition to reviewing the pros and cons of this current technology, the chapter also discusses the development of a new approach to time-of-flight laser imaging based on time-correlated single photon counting. This new method has various advantages compared to the old methods. It has the ability to make 3D measurements on distance, poorly reflecting or transparent surfaces.

Long-range time-of-flight scanning sensor based on high-speed time-correlated single-photon counting

2009 ◽  
Vol 48 (32) ◽  
pp. 6241 ◽  
Author(s):  
Aongus McCarthy ◽  
Robert J. Collins ◽  
Nils J. Krichel ◽  
Verónica Fernández ◽  
Andrew M. Wallace ◽  
...  
Keyword(s):  
Long Range ◽  
High Speed ◽  
Single Photon ◽  
Photon Counting ◽  
Time Of Flight ◽  
Single Photon Counting

Time-of-flight optical ranging system based on time-correlated single-photon counting

1998 ◽  
Vol 37 (31) ◽  
pp. 7298 ◽  
Author(s):  
John S. Massa ◽  
Gerald S. Buller ◽  
Andrew C. Walker ◽  
Sergio Cova ◽  
Manikam Umasuthan ◽  
...  
Keyword(s):  
Single Photon ◽  
Photon Counting ◽  
Time Of Flight ◽  
Single Photon Counting
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