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1. (WO2011148113) METHOD FOR WRITING AND READING DATA BY FLUORESCENCE ON A LIGHT-SENSITIVE SUBSTRATE, AND RELATED SUBSTRATE AND DEVICES

Pub. No.:    WO/2011/148113    International Application No.:    PCT/FR2011/051219
Publication Date: Fri Dec 02 00:59:59 CET 2011 International Filing Date: Sat May 28 01:59:59 CEST 2011
IPC: G11B 7/0045
G11B 7/005
G01N 21/27
G01N 21/64
G11B 7/013
G02B 21/00
G11B 7/00
G11B 7/125
G11B 7/135
Applicants: UNIVERSITE BORDEAUX 1
CANIONI, Lionel, Stéphane
CARDINAL, Thierry
BOUSQUET, Bruno
ROYON, Arnaud
BELLEC, Matthieu
BOURHIS, Kevin
PAPON, Gautier
LEGROS, Philippe
Inventors: CANIONI, Lionel, Stéphane
CARDINAL, Thierry
BOUSQUET, Bruno
ROYON, Arnaud
BELLEC, Matthieu
BOURHIS, Kevin
PAPON, Gautier
LEGROS, Philippe
Title: METHOD FOR WRITING AND READING DATA BY FLUORESCENCE ON A LIGHT-SENSITIVE SUBSTRATE, AND RELATED SUBSTRATE AND DEVICES
Abstract:
The invention relates to a method for the three-dimensional recording of data on a substrate made of a transparent light-sensitive material including at least one dopant, said method including: a first step of calibrating and testing a pulsed light source, which includes calibrating the number of pulses, the level of fluence of each pulse emitted and the pulse rate; a step of inscribing an area of the material. The fluence of each pulse emitted, the number of pulses and the pulse rate are suitable for irradiating the material in said area such as to form stabilised fluorescent aggregates from the dopant while minimising the modification of the refractive index and the absorption coefficient of the substrate in a wavelength spectrum from visible to near infrared.