Optically encoded particles with grey scale spectra

The invention concerns a particle having a grey scale code embedded in its physical structure by refractive index changes between different regions of the particle.

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Bibliographische Detailangaben
Hauptverfasser:	SAILOR MICHAEL J, MEADE SHAWN O
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING HANDLING RECORD CARRIERS INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS TESTING
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Beschreibung
Zusammenfassung:	The invention concerns a particle having a grey scale code embedded in its physical structure by refractive index changes between different regions of the particle.