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Sub-surface characterisation of latest-generation identification documents using optical coherence tomography.

Manuel J Marques1, Robert Green2, Roberto King3

  • 1Applied Optics Group, School of Physical Sciences, University of Kent, Canterbury CT2 7NH, United Kingdom.

Science & Justice : Journal of the Forensic Science Society
|March 19, 2021
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Summary
This summary is machine-generated.

Optical Coherence Tomography (OCT) non-destructively visualizes security features in modern passports and ID cards. This advanced imaging technique helps authorities detect sophisticated document forgeries with high accuracy.

Keywords:
Document inspectionNon-destructive imagingOptical coherence tomographyOptical methodsQuestioned documents

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Area of Science:

  • Forensic Science
  • Optical Imaging
  • Document Security

Background:

  • International border security relies on authenticating identity documents.
  • Increasingly sophisticated security features are embedded in modern passports and ID cards.
  • Detecting advanced counterfeits non-destructively and efficiently remains a challenge.

Purpose of the Study:

  • To investigate the application of Optical Coherence Tomography (OCT) for assessing security features in identification documents.
  • To demonstrate OCT's capability for non-destructive, sub-surface imaging of embedded security features.
  • To address the need for advanced methods to identify sophisticated document forgeries.

Main Methods:

  • Application of Optical Coherence Tomography (OCT) imaging.
  • Imaging of specimen passports and national ID cards.
  • Non-destructive, sub-surface visualization of security features.

Main Results:

  • OCT successfully provided quantitative visualization of embedded security features.
  • The technique allowed for sub-surface imaging of translucent security elements.
  • Demonstrated the potential for high-throughput, sensitive, and selective forgery detection.

Conclusions:

  • Optical Coherence Tomography is a viable tool for assessing security features in polycarbonate-based identity documents.
  • OCT enables non-destructive, in-depth analysis crucial for combating sophisticated document forgery.
  • This imaging modality offers a promising solution for enhancing border security and identity verification.