JP3012700U - prepaid card - Google Patents

Abstract

(57) [Summary] [Object] To provide a prepaid card in which information is coded and recorded by a combination of fine diffraction grating patterns formed by a diffraction grating having a specific grating direction and spatial frequency. [Structure] A diffraction grating pattern group formed by combining a plurality of diffraction grating patterns formed by forming a diffraction grating having a specific diffraction direction and spatial frequency in a minute area is provided, and this diffraction grating pattern group is used as a data code. And

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a prepaid card in which information is coded and recorded by a combination of fine diffraction grating patterns formed by a specific diffraction grating.

[0002]

[Prior art]

 Conventionally, prepaid card specific information for identification has been formed on the prepaid card, for example, in embossed characters on the prepaid card.

However, when the prepaid card is forged, various anti-counterfeit measures are taken, and the signature of the prepaid card holder, the attachment of the hologram sheet, and the diffraction grating pattern composed of the diffraction grating・ Measures such as forming patterns were taken.

[0004]

[Problems to be solved by the device]

 However, since the hologram and the diffraction grating are visually discriminated, the reading device does not read the hologram and the diffraction grating, and since there is no information in them, it was possible to confirm their existence. Even so, there is a problem in that it is not possible to make a true / false determination in the original sense because the prepaid card specific information and the prepaid card identification information cannot be obtained.

[0005]

[Means for Solving the Problems]

 The present invention, which has been made to achieve the above-mentioned target, provides a diffraction grating pattern group in which a plurality of diffraction grating patterns are formed by forming a diffraction grating having a specific diffraction direction and spatial frequency in a minute area. It is characterized in that the pattern group is provided as a data code on the prepaid card.

[0006]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 shows a mark 1 in which a diffraction grating pattern group representing a specific numerical value of the present invention is arranged as a combination of numerical values such as numbers, and this mark 1 is a minute grating having a diffraction grating having a specific diffraction direction and spatial frequency. The diffraction grating pattern 1a formed in the area is used as a minimum unit, and the diffraction grating pattern 1a is used in combination of a plurality of diffraction directions and spatial frequencies of the same type, or a plurality of diffraction directions and spatial frequencies of different types. The diffraction grating pattern group 1 is formed by the combination of.

To further describe the present embodiment in detail, the mark 1 in FIG. 2 is composed of an array of several diffraction grating pattern groups 1 to 4, and the diffraction grating pattern groups 1 to 4 are rectangular microscopic areas. The diffraction grating pattern 1a on which the diffraction grating is formed is composed of four pieces.

For reading the diffraction grating pattern groups 1 to 4, as shown in FIG. 1, a laser oscillator is arranged as a laser light irradiation means at a predetermined interval at a position orthogonal to the mark 20 of the prepaid card 10. , There are four types of the directions of the diffraction gratings that form the mark 20, and there are a plurality of light receiving elements, which are photodiodes that receive the diffracted light from the diffraction grating pattern groups 1 to 4 formed by the combination, depending on the direction of the diffracted light. Individually provided. The laser light having a beam diameter of 1 mm, which is emitted from the laser oscillator to the diffraction grating pattern groups 1 to 4, is reflected by the diffraction grating pattern groups 1 to 4, and the diffracted light is circularly arranged at eight positions. The light is detected by the light receiving element, and the code is recognized by a discriminating device (not shown).

Then, the respective diffraction grating pattern groups 1 to 4 are sequentially read, the numbers thereof are discriminated, and the unique code set in the prepaid card 10 corresponding to the mark 20 can be obtained.

[0010]

EFFECTS OF THE INVENTION According to the present invention, a diffraction grating pattern, which has been formed on a prepaid card to prevent forgery and is used only for visual identification, can be discriminated by mechanical reading, and a code can be obtained. It becomes possible to retain the converted information, and it is difficult to forge, so it has high usability.

[Brief description of drawings]

FIG. 1 is a plan view of a prepaid card of the present invention.

FIG. 2 is a mark in which a diffraction grating pattern group of the present invention is arranged.

[Explanation of symbols]

 1a, 1b, 1c, 1d Diffraction grating patterns 1 to 4 Diffraction grating pattern group 10 Prepaid card 20 Mark

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication G06K 19/00

Claims (1)

[Scope of utility model registration request] 1. A prepaid card in which a diffraction grating pattern group, which is a combination of a plurality of diffraction grating patterns formed by forming a diffraction grating having a specific diffraction direction and a spatial frequency in a minute area, is provided, and the diffraction grating pattern group is used as a data code. A prepaid card characterized by being provided above.