TagsOptical coherence tomography
Tag: optical coherence tomography
Authentication technique composite substrates
Composite substrates that contain paper and polymer layers with the same thickness as traditional security paper are novel options for security documents, and unique...
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Saudi Arabia opens up more visas upon arrival
Passport holders with US, Schengen or UK tourist or commercial visas can now obtain tourist visas upon arrival into Saudi Arabia.
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Deffractive optical Variable device
An optically variable feature composed of grids that diffract light. This allows various images and effects to be generated, including colour changes (shifts) as...