Information processing system

Abstract

In an information storage device in which small compartments each for storing information are arranged three-dimensionally inside a solid body, the solid body having at least one pair of parallel planar portions on its surface is used for a memory medium. The information to be stored is divided into bits and stored in discrete minute areas that distribute three-dimensionally inside the memory medium. Anisotropy is given to the pitch of the memory cell and the pitch in a direction right-angled to the planar portion is made larger than the pitch in the parallel direction. Moreover, the data such that given n-bits are used as a unit is converted into a digital format such that m-bits larger than n are used as a unit and the number of included ‘1s’ is smaller than n, which is recorded in the memory medium. When recording the data on the medium, pieces of the data expressed by the m-bits are arranged on the plate in the right-angle direction.

1 . An information processing system, comprising:
 a memory medium that has a first plane and stores data in a plurality of minute areas being arranged three-dimensionally;   a lighting unit for irradiating an electromagnetic wave onto the first plane of the memory medium;   a receiving unit for receiving the electromagnetic wave that is transmitted through the memory medium or the electromagnetic wave that was radiated after the electromagnetic wave was absorbed; and   an arithmetic unit for performs an arithmetic operation based on information obtained in the receiving unit to obtain position information of the data that is three-dimensionally arranged;   wherein the plurality of minute areas are arranged so that a minimum pitch in a normal direction of the first plane may become larger than a minimum pitch in a direction perpendicular to the normal.   
     
     
         2 . The information processing system according to  claim 1 ,
 wherein denoting the refractive index of the memory medium by n, the size of the minute area in a direction perpendicular to the normal by Dx, the size of the minute area in the normal direction by Dy, the size of a gap of the two minute areas in a direction perpendicular to the normal thereof by Sx, the size of a gap of the two minute areas in the normal direction by Sy, and a maximum of the angle that a travelling direction of the electromagnetic, wave and the normal make by θ a ,   the size of the pitch satisfies
     n =sin(θ a )/sin(θ im ),
 
     S   x   /D   y >tan(θ im ), and
 
   ( S   x   +D   x )/( S   y   +D   y )<tan(θ im ).
 
   
     
     
         3 . The information processing system according to  claim 1 ,
 wherein, denoting the refractive index of the memory medium by n, an angle at which reflectance of a P-polarization component of the electromagnetic wave in a first plane becomes zero by θ b , the size of the minute area in a direction perpendicular to the normal thereof by D x , the size of the minute area in the normal direction by D y , the size of a gap between the two minute areas in the direction perpendicular to the normal by S x , and the size of a gap between the two minute areas in the normal direction by S y ,   the size of the pitch satisfies
     n =sin(θ b )/sin(θ im ),
 
     S   x   /D   y >tan(θ im ), and
 
   ( S   x   +D   x )/( S   y   +D   y )<tan(θ im ).
 
   
     
     
         4 . The information processing system according to  claim 1 ,
 wherein the memory medium is a square pillar including the first plane, and the area of the first plane is larger than the area of a plane perpendicular to the first plane.   
     
     
         5 . The information processing system according to  claim 1 ,
 wherein the memory medium stores data of n-bits (n is a natural number) as data expressed by m-bits (m is a natural number larger than n), and the data of n-bits is converted so that the number of either ‘1’ or ‘0’ may become smaller than the n.   
     
     
         6 . An information processing system, comprising:
 a memory medium for storing data in a plurality minute areas being three-dimensionally arranged;   a lighting unit for irradiating an electromagnetic wave onto the memory medium;   a receiving unit for receiving the electromagnetic wave that is transmitted through the memory medium or the electromagnetic wave radiated after the memory medium absorbed the electromagnetic wave; and   an arithmetic unit that performs an arithmetic operation on information acquired by the receiving unit and outputs the data according to a request from the outside;   wherein the memory medium stores data of n-bits (n is a natural number) as data expressed by m-bits (m is a natural number larger than n), and the data of m-bits is converted so that the number of either ‘1s’ or ‘0s’ may become smaller than the n.   
     
     
         7 . The information processing system according to  claim 1 , wherein the memory medium is fused silica or aluminum oxide. 
     
     
         8 . The information processing system according to  claim 1 , wherein at least a part of the minute areas inside the memory medium is different from the memory medium surrounding the minute areas in the refractive index or an absorption factor of the electromagnetic wave. 
     
     
         9 . The information processing system according to  claim 1 , wherein a frequency of the electromagnetic wave that is absorbed to or radiated from the minute area inside the memory medium differs depending on a position inside the memory medium. 
     
     
         10 . The information processing system according to  claim 1 , wherein the information processing system has a function of rotating the memory medium to a travelling direction of the irradiating electromagnetic wave. 
     
     
         11 . The information processing system according to  claim 6 , wherein the memory medium is fused silica or aluminum oxide. 
     
     
         12 . The information processing system according to  claim 6 , wherein at least a part of the minute areas inside the memory medium is different from the memory medium surrounding the minute areas in the refractive index or an absorption factor of the electromagnetic wave. 
     
     
         13 . The information processing system according to  claim 6 , wherein a frequency of the electromagnetic wave that is absorbed to or radiated from the minute area inside the memory medium differs depending on a position inside the memory medium. 
     
     
         14 . The information processing system according to  claim 6 , wherein the information processing system has a function of rotating the memory medium to a travelling direction of the irradiating electromagnetic wave.