JP6481433B2 - Recording medium and method - Google Patents

Description

  The present invention relates to a storage medium and method.

  In general, the following efforts are being made to preserve historically valuable items and landscapes.

  First, for articles, strict storage and restoration of originals, production of replicas that are faithful to the originals, digital data generation by photographing, digital data generation by shape measurement, reproduction of digital data by computer graphics and virtual reality video, Restoration.

  In addition, in the landscape, a mechanism for maintaining a landscape such as a landscape ordinance, duplication or restoration of digital data by computer graphics or virtual reality video can be mentioned.

  However, some of the originals may be difficult to store or display due to deterioration over time, such as weathering, and may be producing duplicates that are faithful to the originals. There is a problem that the time is huge.

  In the landscape, there is a problem that it is difficult to restore what has already been lost due to its vastness.

  In order to solve these problems, work to save articles and landscapes as digital data of computer graphics or virtual reality video is progressing.

  However, digital data is only utilized, and a technique for safely storing digital data for a long time has not been established.

  For example, lithographic, wooden and bamboo tans are known as recording media in which information has been recorded in ancient times and remain today, but these are extremely low in recording density and are not suitable for recording digital data.

  In addition, for example, magnetic disks and optical disks are generally known as recording media having a high recording density suitable for recording digital data. However, these have been damaged or corroded due to deterioration over time. May be impossible to read in a few years and optical discs in decades.

  On the other hand, it has been proposed to use quartz glass or sapphire which is a crystal of aluminum oxide as a recording medium for storing digital data for a long time (see, for example, Patent Document 1).

  However, there is a problem that quartz glass and sapphire are very expensive.

Further, in the proposal of Patent Document 1, for writing digital data to a recording medium, data on the first coordinate axis is converted into data on the second coordinate axis by performing two-dimensional inverse Fourier transform and recorded. For storing digital data from a recording medium, the first data is obtained by performing a one-dimensional Fourier transform on information obtained by irradiating the recording medium with electromagnetic waves. Data on coordinate axes is obtained, and the method for writing and reading digital data is very complex.

  In addition, there is no guarantee that such a very complicated method of writing and reading digital data will remain in the future, and if lost, the recording medium will be digitally recorded on the recording medium, even if it is free from deterioration over time. There is a problem that it becomes difficult to analyze the data.

International Publication No. 2010/050370

  The present invention has been made to solve such problems, and it is an object of the present invention to be able to store digital data at a high recording density, easily in an analysis, and at a low cost for an ultra-long term.

In order to solve the above-mentioned problems in the present invention, the invention of claim 1 is a recording medium on which digital data is recorded by attaching an optically readable point to a plate-like transparent resin. There,
9 rows of dots in 3 rows in the direction horizontal to the surface of the plate in 3 rows in the thickness direction of the plate as one unit,
A point is always attached as a reference point indicating the existence of a unit in the dotted area in the first row and the first column,
The recording medium is characterized in that 8-bit digital data is recorded depending on whether or not dots are attached to eight dot-like regions other than the first row and the first column.

The invention of claim 2, the transparent resin is obtained by a recording medium according to claim 1, wherein a is any one of transparent polyethylene terephthalate resin, transparent polycarbonate resin, a transparent acrylic resin is there.

The invention of claim 3 is a method for recording digital data by attaching an optically readable point to a plate-like transparent resin,
9 rows of dots in 3 rows in the direction horizontal to the surface of the plate in 3 rows in the thickness direction of the plate as one unit,
Always attach a point to the dotted area in the first row and first column as a reference point indicating the existence of the unit,
The recording method is characterized in that 8-bit digital data is recorded depending on whether or not dots are added to eight point-like regions other than the first row and the first column.

According to a fourth aspect of the present invention, in the recording method according to the third aspect, the transparent resin is any one of a transparent polyethylene terephthalate resin, a transparent polycarbonate resin, and a transparent acrylic resin. is there.

  According to the first aspect of the present invention, digital data is recorded by attaching an optically readable point to the transparent resin, and the fourth aspect of the invention is optically applied to the transparent resin. Since digital data is recorded by adding a readable point, if ultraviolet rays are blocked, the digital data can be stored in a readable manner with a high-magnification loupe at a low cost for over 100 years.

  Further, in the invention of claim 1, nine dotted areas of 3 rows and 3 columns are set as one unit, and dots are always given as reference points indicating the existence of units in the dotted area of the first row and the first column. Since 8-bit digital data is recorded depending on whether or not dots are attached to the eight dot-like areas other than the first row and the first column, the invention of claim 4 is the third row and the third column. Nine dot-like areas are taken as one unit, and dots are always given as reference points indicating the existence of units in the dot-like area in the first row and the first column, and the eight dot-like areas other than the first row and the first column. Since 8-bit digital data is recorded depending on whether a dot is added or not, digital data can be easily stored at high recording density.

  According to a second or fifth aspect of the present invention, the transparent resin is plate-shaped, and includes nine rows of nine dot-shaped regions in three rows in the thickness direction of the plate and in a direction horizontal to the surface of the plate as one unit. Therefore, a large number of recording media can be stored without being bulky.

  In the invention of claim 3 or 6, the transparent resin is any one of a transparent polyethylene terephthalate resin, a transparent polycarbonate resin and a transparent acrylic resin. Can be saved for 100 years.

  As described above, the present invention has an effect that digital data can be stored at a high recording density, easily analyzed, and at a low cost for an ultra-long term.

1 is a cross-sectional view of an example of a recording medium of the present invention. The figure explaining an example of the method of attaching the point which can be read optically to transparent resin.

  Hereinafter, an embodiment of the present invention will be described.

  First, the recording medium of the present invention will be described.

  In the recording medium of the present invention, digital data is recorded by attaching an optically readable point to a transparent resin, and nine dotted areas of 3 rows and 3 columns are defined as one unit. A point is always given as a reference point indicating the existence of a unit in the dotted area in the first row and the first column, and 8 bits depending on whether or not dots are added to the eight dotted areas other than the first row and the first column. Digital data is recorded.

  For example, the dotted area in the first row and the second column is at the 1's place, the dotted area in the first row and the third column is at the second position, the dotted area in the second row and the first column is at the third position, and the second row is 2 The dotted area in the column is the 4th place, the dotted area in the 2nd and 3rd column is the 5th place, the dotted area in the 3rd row and 1st column is the 6th place, and the dotted shape in the 3rd and 2nd column The dotted area in the third place and the third row and third column is in the eighth place, the dotted area to which the optically readable point is attached is 1, and the optically readable point 8 bits of digital data are recorded with a dot-like area that is not marked with "0" as 0.

  An example in which the recording medium of the present invention is a transparent resin plate and nine rows of three dots in a direction parallel to the surface of the plate in three rows in the thickness direction of the plate is taken as one unit. It is shown in 1.

  In FIG. 1, in the first unit A, an optically readable point 2 is attached only to the dotted area in the first row and first column as a reference point indicating the presence of the first unit A. Since the eight dot-like areas other than the column are not transparently read and remain transparent, 00000000 in binary notation is recorded.

  In FIG. 1, in the second unit B, an optically readable point 2 is added to the dotted area in the first row and the first column as a reference point indicating the presence of the second unit B, and The dot-like area in the first row and the second column is not transparently pointed and remains transparent, and can be read optically in the dot-like area in the first row and the third column at the second place. An optically readable point 2 is added to the dot-like region in the second row and the first column at the third place, and an optical point is added to the dot-like region in the second row and the second column at the fourth place. The readable dot 2 is attached, and the optically readable dot 2 is attached to the dot-like region in the second row and third column at the fifth place, and the dot shape in the third row and first column at the sixth place. Is marked with an optically readable point 2, and the optically readable point is not attached to the dotted area in the third row and second column of the 7th place, and remains transparent. of Since optically in punctate regions of row 3 column remains clear no point readable attached, 00111110 binary is recorded.

  In FIG. 1, in the third unit C, an optically readable point 2 is added to the dotted area in the first row and the first column as a reference point indicating the presence of the third unit C, and the first row and the first column. Since the point 2 which can be read optically is also attached to the eight dot-like regions other than the eyes, binary 11111111 is recorded.

  The transparent resin of the recording medium of the present invention may be a resin that is transparent, inexpensive, and excellent in durability. Examples thereof include a transparent polyethylene terephthalate resin, a transparent polycarbonate resin, and a transparent acrylic resin.

  In the case of transparent polyethylene terephthalate resin, transparent polycarbonate resin, and transparent acrylic resin, it can be stored for several hundred years if only ultraviolet rays can be blocked.

  On the other hand, vinyl chloride resins and polystyrene resins are not suitable as transparent resins for the recording medium of the present invention because they have low solvent resistance and may be difficult to wipe off mold on the surface.

  In order to read digital data with the recording medium of the present invention, a known optical reading method, for example, using a high-magnification magnifying glass, first, it is always arranged at intervals of three dotted areas. 3 points and 3 columns as a reference point, and for each reference point, find a point-like region of 3 rows and 3 columns with the point-like region to which the reference point is attached as the first row and the first column. If dots are attached to 8 point-like areas other than the 1st row and 1st column of the row-and-column dotted area, a dot is attached. Since it is not attached, it can be performed by reading 8-bit digital data.

  Next, an example of a method for attaching an optically readable point to a transparent resin will be described.

  For example, as shown in FIG. 2, an optically readable dot is attached to a transparent resin by using a laser exposure machine including a laser issuing device 11, a shutter 12, and a condenser lens 13. The focal point of the laser is adjusted by the condenser lens 13 to each dot-like region to be marked, and the laser irradiation intensity is controlled by the shutter 12 using a resin material, and each dot-like region to be marked is clouded. You can do this by adding a dot.

  Currently, a laser exposure machine having an accuracy of about 3600 dpi is commercially available. If 9 dots of 3 rows and 3 columns are defined as one unit, and a space corresponding to one dot is provided between two adjacent dots, one unit has 6 dots square. It is necessary, and the length of one side of the square that one unit occupies in the transparent resin is (25.4 mm ÷ 3600 dpi) × 1 inch when the transparent resin is dotted with an accuracy of 3600 dpi, since 1 inch is 25.4 mm. 6≈0.04233 mm. In other words, 8-bit digital data can be recorded per approximately 0.04233 mm square.

  If the laser light is made green or blue with a short wavelength and the accuracy of the condenser lens is increased, digital data can be recorded at a higher density.

  In addition, if a plurality of lasers are irradiated simultaneously, a plurality of dot-like regions can be clouded at a time to make dots, and the recording speed can be increased.

DESCRIPTION OF SYMBOLS 1 ... Transparent resin board 2 ... Point 11 ... Laser issuing apparatus 12 ... Shutter 13 ... Condensing lens A ... 1st unit B ... 2nd unit C ... 3rd unit

Claims (4)

A recording medium on which digital data is recorded by attaching an optically readable point to a plate-like transparent resin,
9 rows of dots in 3 rows in the direction horizontal to the surface of the plate in 3 rows in the thickness direction of the plate as one unit,
A point is always attached as a reference point indicating the existence of a unit in the dotted area in the first row and the first column,
8. A recording medium, wherein 8-bit digital data is recorded depending on whether or not dots are attached to eight dot-like areas other than the first row and the first column. The transparent resin is a transparent polyethylene terephthalate resin, transparent polycarbonate resin, the recording medium according to claim 1, wherein a is any one of transparent acrylic resin. A method of recording digital data by attaching optically readable dots to a plate-like transparent resin,
9 rows of dots in 3 rows in the direction horizontal to the surface of the plate in 3 rows in the thickness direction of the plate as one unit,
Always attach a point to the dotted area in the first row and first column as a reference point indicating the existence of the unit,
8. A recording method comprising: recording 8-bit digital data depending on whether or not dots are added to eight point-like regions other than the first row and the first column. 4. The recording method according to claim 3 , wherein the transparent resin is any one of a transparent polyethylene terephthalate resin, a transparent polycarbonate resin, and a transparent acrylic resin.

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