JPH0726913U - Polarization medium reader - Google Patents

Abstract

(57) [Abstract] [Purpose] A polarizing member having different polarization directions is arranged on a medium such as a card, and the polarizing member is arranged between the light source and the light receiving section, which makes it difficult to counterfeit the card and the device cost. What you can create. [Structure] The medium 1 is a transparent resin card base such as vinyl chloride, a magnetic stripe 2, a wide polarizing member 3 and 4 having different polarization directions, and a narrow polarizing member 3 having different polarization directions. ′ And 4 ′ are arranged and fixed in a bar code form according to specific information. The polarization directions of the polarization members 3, 3'and 4, 4'having different polarization directions are different by, for example, 90 °. In the polarizing medium reader, a light source 5 such as a light emitting element is arranged below the medium 1. On the upper side of the medium 1, a light-receiving unit 8 including a light-receiving element 8 and a polarization member 6 that transmits only light in the polarization direction or a polarization member 7 that transmits only light in the other polarization direction is arranged on the optical path of the light source 5. The polarization members 6 and 7 have different polarization directions, for example, 90 °, the polarization members 3 and 3 ′ and the polarization member 6 are in the same direction, and the polarization members 4 and 4 ′ and the polarization member 7 are in the same direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a polarizing medium reader for reading information by arranging polarizing members having different polarization directions on a medium such as a card to record specific information.

[0002]

[Prior art]

 Conventionally used magnetic cards are easy to falsify the recorded contents and forge the cards, and forgery prevention is strongly required. Further, there are some cards such as optical cards and IC cards which are difficult to forge, but those cards require a very expensive recording / reading device and have a complicated structure.

[0003]

[Problems to be solved by the device]

 The problem to be solved is that it is easy for a magnetic card to falsify the recorded contents and forgery the card, and for cards that are difficult to forge such as an optical card and an IC card. The recording / reading device is very expensive and the structure is complicated. In view of the above-mentioned drawbacks, an object of the present invention is to provide a card and a device which are difficult to forge by arranging polarizing members having different polarization directions on a medium such as a card and disposing the polarizing member between the light source and the light receiving section. It is to propose a polarizing medium reader that can be manufactured at low cost.

[0004]

[Means for solving the problem]

 The present invention is a reader for recording specific information by arranging polarizing members having different polarization directions on a medium such as a card, and arranging the medium between a light source and a light receiving section. However, the gist is that a polarizing member that allows only light of each polarization direction to pass therethrough is arranged between the light source and the light receiving unit.

[0005]

[Action]

 When the medium 1 travels and the light from the light source 5 is applied to and passed through the polarizing members 3, 3'of the medium 1, the light is applied to the polarizing member 6, and the polarizing members 3, 3'and the polarizing member 6 are polarized. Since the directions are the same, the light is transmitted and projected onto the light receiving unit 8 to output a signal. When the light from the light source 5 is applied to the polarizing members 4 and 4'of the medium 1 and then passes through the polarizing member 6, the polarizing members 4 and 4'and the polarizing member 6 have different polarization directions. Therefore, the light is not projected onto the light receiving unit 8 and no signal is output. The output and non-output of the signal from the light receiving portion 8 become signals along the arrangement of the polarizing members 3, 3'and 4, 4'arranged on the medium 1 according to specific information and having different polarization directions.

[0006]

【Example】

 The present invention will be described below with reference to the illustrated embodiments. 1 is a first embodiment, FIG. 1 is a perspective view of a polarization medium reader, FIG. 2 is an explanatory view of the principle that light can be transmitted by polarized light, and FIG. 3 is an explanation of the principle that light cannot be transmitted by polarized light. It is a figure.

In FIG. 1, a medium 1 of a polarizing medium reader is composed of a synthetic resin card base such as transparent vinyl chloride and a magnetic stripe 2 and polarizing members 3 and 4 having wide widths and different polarization directions. Polarizing members 3'and 4'having narrow polarization directions different from each other are arranged and fixed in a bar code according to specific information. The polarization directions of the polarizing members 3, 3'and 4, 4'having different polarization directions are different by 90 °, for example. A magnetic head (not shown) is slidably contacted with the magnetic stripe 2 to record / read information. The card base of the medium 1 may be transparent at least at the positions where the polarizing members 3, 3 ', 4, 4'are fixed. Further, at least the back surface of the medium 1 where the polarizing members 3, 3 ′, 4 and 4 ′ are fixed is preferably coated with a translucent paint.

In FIG. 1, the polarizing medium reader has a light source 5 such as a light emitting element disposed below the medium 1. On the upper side of the medium 1, there are arranged on the optical path of the light source 5 a polarizing member 6 that allows only light of a polarization direction to pass or a polarizing member 7 that allows only light of another polarization direction to pass and a light receiving portion 8 composed of a light receiving element. . The polarization directions of the polarization members 6 and 7 are different by 90 °, for example, the polarization members 3, 3'and the polarization member 6 are in the same direction, and the polarization members 4, 4'and the polarization member 7 are in the same direction. Further, another light source 9 and a light receiving section 10 are arranged on the optical path of the light source 5 beside the light source 5.

In the principle explanatory view of FIG. 2, when the light source 5 passes through the polarizing plates 11 having the same polarization direction, light is transmitted. In the principle explanatory view of FIG. 3, when the light source 5 passes through the polarizing plates 11 and 12 having different polarization directions, it becomes opaque. In the present invention, this principle is adopted.

The operation of the polarization medium reader is such that, when only the polarization member 6 is on the upper side of the medium 1 in FIG. 1, the medium 1 travels along a traveling path (not shown) so that the light from the light source 9 is polarized by the medium 1. When the light is directly projected onto the light receiving section 10 after being applied to 3, 3'and 4, 4 ', the light passes through the polarizing member, so the light is weakened a little and is projected onto the light receiving section 10. , The signal corresponding to the light intensity is output. At this time, if the opaque paint or ink is applied and coated on the opaque medium or the polarizing members 3, 3'and 4, 4 ', the light from the light source 9 is not projected onto the light receiving portion 10, It is detected that it is not a polarizing medium.

When the medium 1 travels and the light of the light source 5 is applied to the polarization members 3, 3 ′ of the medium 1 and passes therethrough, and then the light is applied to the polarization member 6, the polarization members 3, 3 ′ and the polarization member 6 are irradiated. Since the polarization directions are the same, the light is transmitted and projected onto the light receiving unit 8 to output a signal. When the light from the light source 5 is applied to the polarizing members 4 and 4'of the medium 1 and then passes through the polarizing member 6, the polarizing members 4 and 4'and the polarizing member 6 have different polarization directions. Therefore, the light is not projected onto the light receiving unit 8 and no signal is output. The output and non-output of the signal from the light receiving portion 8 become signals along the arrangement of the polarizing members 3, 3'and 4, 4'arranged on the medium 1 according to specific information and having different polarization directions.

In FIG. 1, when there is only the polarization member 7 on the upper side of the medium 1, the medium 1 travels on a traveling path (not shown) and the light of the light source 5 is applied to the polarization members 3 and 3 ′ of the medium 1 and passes therethrough. After that, when light is applied to the polarizing member 7, the polarizing members 3 and 3'and the polarizing member 7 have different polarization directions, so that the polarizing members 3 and 3'are opaque and are not projected onto the light receiving portion 8 and no signal is output. When the light of the light source 5 is applied to the polarizing members 4 and 4'of the medium 1 and passes through, and then the light is applied to the polarizing member 7, the polarizing members 4 and 4'and the polarizing member 7 have the same polarization directions, and thus the light is transmitted. Then, the light is projected onto the light receiving unit 8 and a signal is output. The output and non-output of the signal from the light receiving unit 8 is in line with the arrangement of the polarizing members 3, 3'and 4, 4'having different polarization directions arranged on the medium 1 according to the specific information as described above. It becomes a signal.

The polarization directions of the polarizing members 3, 3'and 4, 4'and the polarizing members 6, 7 can be set appropriately. If the signal from the light receiving portion 8 is recorded in advance on the magnetic stripe 2 through an arithmetic circuit (not shown), it is difficult to forge because it is impossible to visually determine how the polarization directions are different if they match each other. . The magnetic stripe 2 may be omitted, and it may be determined that the medium is a polarizing medium based only on the detection signal.

FIG. 4 is a second embodiment, and FIG. 4 is a perspective view of a polarizing medium reader.

In FIG. 4, the medium 1 is substantially the same as the first embodiment. In FIG. 4, in the polarizing medium reader, light sources 5 and 5 ′ such as light emitting elements are arranged below the medium 1. On the upper side of the medium 1, a light receiving section 8 composed of a light receiving element and a polarizing member 6 that allows only light in the polarization direction to pass through is arranged on the optical path of the light source 5. Further, on the upper side of the medium 1, there is arranged a light receiving portion 8'comprising a polarizing member 7 and a light receiving element for passing only light of other polarization directions on the optical path of the light source 5 '. The polarization directions of the polarization members 6 and 7 are different by 90 °, for example, the polarization members 3, 3'and the polarization member 6 are in the same direction, and the polarization members 4, 4'and the polarization member 7 are in the same direction.

In the second embodiment, the operation of the polarizing medium reader is such that the medium 1 travels on a traveling path (not shown) and the light of the light source 5 is applied to the polarizing members 3 and 3 ′ of the medium 1 and passed. When the post-polarization member 6 is irradiated with light, the polarization members 3, 3'and the polarization member 6 have the same polarization directions, so that the light is transmitted and projected onto the light receiving portion 8 to output a signal. When the light from the light source 5 is applied to the polarizing members 4 and 4'of the medium 1 and then passes through the polarizing member 6, the polarizing members 4 and 4'and the polarizing member 6 have different polarization directions. Therefore, the light is not projected onto the light receiving unit 8 and no signal is output.

Next, when the medium 1 is run and the light of the light source 5 ′ is applied to the polarization members 3 and 3 ′ of the medium 1 and then passed, the light is applied to the polarization member 7, and the polarization members 3 and 3 ′. Since the polarization direction of the polarization member 7 is different, the polarization member 7 becomes opaque and is not projected onto the light receiving portion 8'and no signal is output. When the light of the light source 5'is applied to the polarizing members 4 and 4'of the medium 1 and passes therethrough, and then the light is applied to the polarizing member 7, the polarizing members 4 and 4'and the polarizing member 7 have the same polarization direction. Then, the light is projected onto the light receiving portion 8'and a signal is output.

Output and non-output of signals from the light receiving portions 8 and 8 ′ are similar to those described above, and the polarizing members 3, 3 ′ and 4 having different polarization directions are arranged on the medium 1 according to specific information. The signal follows the arrangement of 4 '. If the signals from the light receiving portions 8 and 8'are recorded in advance on the magnetic stripe 2 through an arithmetic circuit (not shown), it is impossible to visually discern how the polarization directions are different if they match each other. It becomes difficult, and a double check becomes possible by providing two detection systems that transmit the polarizing member 6 and the polarizing member 7.

5 and 6 show a third embodiment, FIG. 5 is a perspective view of a polarizing medium reader, and FIG. 6 is a sectional side view of the medium.

In the medium 1'of the third embodiment, the polarizing members 3, 3'and 4, 4'are fixed to the front surface and the continuous polarizing member 3 is fixed to the back surface thereof, as in the first embodiment. In the polarizing medium reader, a light source 5 such as a light emitting element is arranged below the medium 1 '. On the upper side of the medium 1 ', a light receiving portion 8 composed of a light receiving element is arranged on the optical path of the light source 5. The continuous polarizing member 4 may be fixed to the back surface.

In the operation of the polarizing medium reader in the third embodiment, the medium 1 ′ travels on a traveling path (not shown) and the light of the light source 5 is applied to the continuous polarizing member 3 on the back surface of the medium 1 ′. When the light passes through the polarizing members 3, 3 ′ and 4, 4 ′ on the rear surface after passing through, when the light is applied to the polarizing members 3, 3 ′, since the polarization directions are the same, the light is transmitted and projected onto the light receiving unit 8. Signal is output. When the light from the light source 5 is applied to the continuous polarizing member 3 on the back surface of the medium 1'and passed therethrough, it is applied to the polarizing members 4 and 4'on the front surface. Since ′ has a different polarization direction, it becomes opaque and is not projected onto the light receiving portion 8 and no signal is output.

7 and 8 show a fourth embodiment. FIG. 7 is a side view of the polarizing medium reader, and FIG. 8 is a perspective view of the polarizing medium reader.

The medium 1 ″ of the fourth embodiment is a cardboard made of opaque or transparent vinyl chloride or the like made of a synthetic resin and has a wide magnetic stripe 2 as in the first and second embodiments. Polarizing members 3 and 4 having different polarization directions and polarizing members 3'and 4'having narrow polarization directions and different in polarization direction are arranged and fixed in a bar code according to specific information. A light source 5 such as a light emitting element is provided above the medium 1 ″, and a light receiving portion 8 including a polarizing member 6 or 7 and a light receiving element is disposed on an optical path through which the light reflected from the medium 1 ″ is projected.

In the fourth embodiment, the operation of the polarization medium reader is that the medium 1 ″ travels on a traveling path (not shown) and the light of the light source 5 is applied to the polarization members 3 and 3 ′ of the medium 1 ″ to be reflected. Then, when the polarizing member 6 is irradiated with light, the polarizing members 3 and 3'and the polarizing member 6 have the same polarization directions, so that they are transmitted and projected onto the light receiving portion 8 to output a signal. When the light from the light source 5 is applied to the polarizing members 4 and 4'of the medium 1 "and reflected and the light is applied to the polarizing member 6, the polarizing members 4 and 4'and the polarizing member 6 have different polarization directions, and thus are opaque. The light is not emitted to the light receiving unit 8 and the signal is not output.

When the polarization member 6 is the polarization member 7, the polarization members 3, 3 ′ and the polarization member 7 have different polarization directions, so that they are non-transmissive and are not projected onto the light receiving unit 8 and no signal is output. When the light is applied to the polarizing members 7 by being reflected by the members 4, 4 ′, the polarizing members 4, 4 ′ and the polarizing member 7 have the same polarization directions, and are transmitted and projected onto the light receiving unit 8. The signal is output.

In the above description, the polarization members 3, 3 ′, 4, 4 ′ and the polarization members 6, 7 whose polarization directions are fixed are used, but the liquid crystal having different polarization directions depending on how the electric field is applied. A material may be used and an electric field may be applied to each. When a liquid crystal material is used as a polarizing member in the medium, an electrode is provided in the medium to supply power.

[0027]

[Effect of device]

 Since the present invention is configured as described above, since polarizing members having different polarization directions are arranged on a medium such as a card and the polarizing member is arranged between the light source and the light receiving unit, it is difficult to forge a card. Therefore, it is possible to provide a polarizing medium reader that has an excellent effect in practical use, such as that the device can be manufactured at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a polarizing medium reader.

FIG. 2 is an explanatory view of the principle that light can be transmitted by polarized light.

FIG. 3 is an explanatory view of the principle that light cannot be transmitted due to polarized light.

FIG. 4 is a perspective view of a polarization medium reader according to a second embodiment.

FIG. 5 is a perspective view of a polarization medium reader according to a third embodiment.

FIG. 6 is a sectional side view of the same medium.

FIG. 7 is a side view of a polarizing medium reader according to a fourth embodiment.

FIG. 8 is a perspective view of the polarization medium reader.

[Explanation of symbols]

 1, 1 ', 1 "Medium 3, 3', 4, 4 ', 6, 7 Polarizing member 5, 5' Light source 8, 8 'Light receiving part

Claims (1)

[Scope of utility model registration request] 1. A reader for arranging polarizing members having different polarization directions on a medium such as a card to record specific information and reading the information, wherein the medium is arranged between a light source and a light receiving section. Then, a polarizing medium reader in which a polarizing member that allows only light of each polarization direction to pass through is disposed between the light source and the light receiving unit.