Patent ID: 8599658

Claim:
Method for 3D recording of data on a medium formed from a transparent photosensitive material including at least one dopant, said method including: a first step of calibrating and checking a first pulsed light source including calibrating the number of pulses, the level of fluence of each pulse emitted and the rate of the pulses; and a step of inscribing an area of the material, wherein the fluence of each pulse emitted, the number of pulses and the rate of the pulses are suitable for irradiating the material in said area such as to form fluorescent clusters stabilized from the dopant, each cluster forming a fluorescent emitter, the spectrum and the intensity of fluorescence of which correspond to a signature for encoding a data word, said stabilized clusters being obtained while minimizing the modification of the refractive index and the absorption coefficient of the medium in a wavelength range from visible to near infrared.