Coding information writing and interference measurement reading method and device of nanometer inscribing optical disc

Abstract

The invention provides a coding information writing and interference measurement reading method of a nanometer inscribing optical disc. The method comprises the following steps: carrying out 2m-system data coding on information to be stored to obtain storage numerical codes, each bit of the storage numerical codes respectively corresponding to m pieces of binary information; performing storage digital writing on each storage site in the form of m recording points through a nanometer information writing method, wherein the m recording points correspond to m different pieces of optical path information after information recording; and irradiating one of the read light beams to the storage site, collecting reflected light, performing interference with the fixed-phase light beam of the read light beam, measuring a light intensity interference result, and reading the storage numerical code according to the corresponding relationship between the light intensity interference result and the storage numerical code. The invention also provides a corresponding reading device. According to the method, the information storage capacity is improved through nanometer photoetching, meanwhile, an interference measurement method is adopted as a reading method of the optical disc, and rapid information reading of the optical disc with high storage density can be achieved.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a method and device for writing coded information and interferometric reading of a nano-recorded optical disc. Background technique [0002] With the development of technologies such as gene sequencing and brain activity reading, not only a large amount of data is generated, but also higher requirements are put forward for how to store the data effectively, stably and accurately. Based on the above-mentioned background, the optical disk storage technology has well adapted to the requirements of the times due to its advantages of energy saving, long storage life, good safety and easy processing. As for optical disc technology, the limitation of storage capacity seriously hinders the development of optical disc technology. [0003] In order to increase the capacity of the optical disc, the traditional technical route is to reduce the size of the recording spot. With the successf...

AI Technical Summary

Problems solved by technology

In 2011, the S.W Hell research team proposed a new microscopic technology RESOLFT (reversible saturated optical 'fluorescence' transition between two states) that can be used for super-resolution optical storage reading and writing, using the photocuring and photoswitching properties of green fluorescent protein (rsEGFP) , through the method of super-resolution writing and reading, a high-density optical storage experiment with a dot pitch of 250nm was realized, see [Grotjohann T, Testa I, Leutenegger M, et al.Diffraction-unlimited all-optical imaging and writing with a photochromic GFP[ J].Nature,2011,478(7368):204-208], however, the use of fluorescent protein for data storage greatly reduces the storage stability and storage life of optical discs, and compared with traditional optical disc technology, it also improves CD production cost

Accordingly, Gu Min's research team applied for an international patent, see patent document PCT / AU2013 / 001378, but this solution cannot realize the reading of information written on the optical disc, and the technical route is still unclear

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