Застосування наноструктурованих люмінофорів у системах об’ємного оптичного запису

Abstract

The principles of the organization of volume optical recording systems and synthesis of recording medum based on nanostructured pyrazoline luminophores were analyzed. Multi-layer photoluminescent media architecture with sandwich-structure of information and intermediate layers, information coding with lands’ length and peripheral areas was proposed. It was shown that thickness of the information layers depends on the on the information elements depth, while thickness of the intermediate layers depends on optical system objective lens numerical aperture and must be chosen big enough to divide readout signal from different layers. While all the structure of the disc is transparent and homogeneous the parasitic signal will be caused mostly by photoluminescece and absorption of pits areas where laser light is unfocused. For big quantity of layers the level noise will got significant value, so it was suggested to distinguish readout signal as a variable one. A mathematical model for reading data from a multi-layer photoluminescent media is proposed. To make a proper analysis of multi-layer photoluminescent media optimal characteristics it was developed computer simulation of the readout laser beam propagation process. There was built digital interference pattern using input parameters of the multi-layer photoluminescent drive and then calculated the path of the every single light point up to the objective lens. A methodology for estimating the parameters of a storage media based on volumetric optical recording systems which uses comparing of the system architecture parameters and the characteristics of the read-out signal has been developed. The algorithm for determining the optimal architecture of the storage device through the solution of the problem of finding an extremum is proposed.