Multi-wavelength stacked fluorescent data memory and device fabrication and reading method

Abstract

The invention discloses a multi-wavelength laminated fluorescence data memory, a device manufacturing method of the multi-wavelength laminated fluorescence data memory and a reading method of the multi-wavelength laminated fluorescence data memory, and belongs to an optical information storage technology. The multi-wavelength laminated fluorescence data memory, the device manufacturing method and the reading method provided by the invention have a thought that incident laser is used and is irradiated onto an information layer to be read of a fluorescence memory; fluorescence signals are generated when fluorescence media in a groove of an information bit of the information layer absorbs energy; the wavelength of the fluorescence signals is different from that of others, so that a CCD (Charge Coupled Device) detector uses one filter plate to filter out the signals with the wavelength beyond the wavelength of the fluorescence excited by the information layer to be read, and a CCD is enabled to only receive the fluorescence signals of the information layer to be read; and after the reading completion of one layer of information, a computer is used for controlling a filter to be switched to the filter plate corresponding to the information layer to be read. The condition that the fluorescence signals received by the CCD only contain the signals of the information layer to be read is ensured, so that the goal of layer selection is achieved.

Description

technical field [0001] The invention belongs to the technology of optical information storage, and in particular relates to the production of fluorescent materials and a memory reading method. Background technique [0002] Optical data storage technologies such as CD and DVD discs have been widely used in audio-visual and computer data storage fields. Optical information storage technology is a technology that irradiates the medium with laser light, causes physical and chemical changes in the medium through the interaction between the laser and the medium, and stores information. In order to meet the needs of the development of computer technology, the data storage capacity of storage devices is increasing at a rate of 60% every year. At present, people are trying to find ways to further increase the storage capacity of the memory. At this stage, the method of increasing the capacity of storage devices is to increase the magnetic and The storage density of optical recording...

AI Technical Summary

Problems solved by technology

Multilayer optical discs were proposed by Philips and IBM. However, as far as multilayer optical discs are concerned, existing multilayer optical discs produce signals that are difficult to distinguish and accept, such as interference, scattering, and inner layer crosstalk, due to the coherent characteristics of the probe beam[ Yang Shuguang, Zhang Fumei. Research on Multilayer Fluorescent Disc-C3D Technology [J]. Disc Technology, 2000 (5): 19-23

[0004] Therefore, for multi-layer memory, it is not only required to be able to store sufficient information, to respond quickly, but also to require a high signal-to-noise ratio, which is difficult to achieve with existing technologies.

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