JPH10177618A - Hologram film bar code and optical reading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To add large amounts of information to a limited bar code face and to apply this system to various fields in which information amounts are insufficient in a conventional bar code. SOLUTION: A hologram film bar code 4 is constituted so that plural bands of hologram films 3 are arranged in parallel like a bar code. Also, an optical reading device 5 which reads data by irradiating a medium with light and by conducting scanning while detecting the strength of a reflected light from the medium is provided with a first light source 6 which irradiates the medium at a first angle, a first optical reading port 7 which detects the strength of the reflected light which is light from the light source 6 irradiating on the medium to be reflected, a second light source 8 which irradiates the medium at a second angle and a second optical reading port 9 which detects the strength of the reflected light which is light from the light source 8 irradiating on the medium to be reflected. The hologram film bar code 4 as the medium is scanned, bar code data are obtained from the first optical reading port 7 and the other extended data are obtained from the second optical reading port 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hologram film barcode and an optical reader, and more particularly, to a storage medium in a key bypass system by improving data processing efficiency and a reader therefor.

[0002]

2. Description of the Related Art FIG. 10 is an explanatory view of the prior art, and is an enlarged plan view showing a conventional bar code. As shown in this figure, the conventional bar code device uses a bar code combined with a black bar 1 and a space 2 (white) having different thicknesses, irradiates the bar code with light, and scans the bar code. Utilizing that weak reflected light is obtained in the portion 1 and strong reflected light is obtained in the space 2, the bar code information is obtained by converting the level of the reflected light.

[0003]

However, in the prior art having the above-described structure, the amount of information that can be held as a barcode is limited, and the barcode cannot cope with the amount of information required for various applications at present. It's gone.

[0004]

The present invention is characterized in that a hologram film barcode is constructed by arranging a plurality of hologram film bands in parallel in a barcode shape. In addition, in an optical reading device that irradiates the medium with light and scans while detecting the intensity of reflected light from the medium to read data, a first light source that irradiates the medium at a first angle, A first light reading port for detecting the intensity of the reflected light reflected by the light from the light source hitting the medium;
A second light source that irradiates the medium at an angle of, and a second light reading port that detects the intensity of the reflected light that is reflected by the light from the second light source hitting the medium are provided. It is characterized in that scanning is performed, bar code data is obtained by the first optical reading port, and other extended data can be obtained from the second optical reading port.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is an explanatory view showing the present embodiment, and is a perspective view of a hologram film barcode.

Reference numeral 3 in FIG. 1 denotes a hologram film as a medium according to the present embodiment, in which a plurality of strips having different thicknesses are arranged in a bar code form with a space 2 therebetween to form a hologram film bar code 4. I do. In this example, a hologram film 3 is used in place of a normal barcode black bar. FIG. 2 is a side view showing the optical reader according to the embodiment. In FIG. 2, reference numeral 5 denotes an optical reading device, and the hologram bar code 4 is arranged at the bottom of the drawing to read.

Reference numeral 6 denotes a first light source, and 7 denotes a first optical reading port, which is provided on the lower surface side of the optical reading device 5 in the drawing. The light emitted from the light source 6 is reflected almost perpendicularly to the hologram barcode surface, and the reflected light is reflected by the light reading port 7.
The light source 6 and the optical reading port 7 are arranged so as to be incident on the light source 6. Reference numeral 8 denotes a second light source, and 9 denotes a second optical reading port, which are provided on the lower surface side of the optical reading device 5 in the drawing. Light source 8
The light source 8 and the light reading port 9 are arranged such that the light irradiated from the light source is reflected at a predetermined angle that is not perpendicular to the hologram barcode surface, and the reflected light enters the light reading port 9.

FIG. 3 is a perspective explanatory view showing the operation of the present embodiment, and the operation of the present embodiment will be described with reference to FIG. The optical reading device 5 moves so as to vertically cross each hologram film 3 and space 2 in the longitudinal direction of the barcode (for example, scanning while moving from left to right in FIG. 3). At this time, the light source 6 and the light source 8 irradiate the bar code surface at a predetermined angle.

A first angle (α angle) which is an angle of the light source 6
Is substantially perpendicular to the bar code surface, and reflected light from the bar code surface enters the optical reading port 7 as shown by the solid arrow in the figure, and detects the level of the reflected light in the scanning direction. The second angle (β angle) which is the angle of the light source 8 is α
The angle is an oblique direction different from the angle. As shown by the dashed arrow in the figure, the reflected light from the barcode surface enters the optical reading port 9 and detects the level of the reflected light in the scanning direction.

Here, since the hologram film 3 can obtain light and dark by interference of light in a certain direction, even if the same hologram film 3 is used, if the hologram film 3 is arranged in a different direction, the intensity of reflected light is different. For example, both the hologram film 3a and the hologram film 3b have a low reflected light level with respect to the light having the α angle, but the hologram film 3a has a high reflected light level with respect to the light having the β angle, and the hologram film 3b has a low reflected light level. If the hologram films 3a and 3b are set to be lower, the light reading port 7 corresponding to the light source 6 always detects low-level reflected light with respect to all the hologram films 3, so that both the hologram films 3a and 3b have the conventional black color. Works like a bar.

On the other hand, in the optical reading port 9 corresponding to the light source 8,
High level light is detected for the hologram film 3a, and low level light is detected for the hologram film 3b. For the space 2, both the optical reading port 7 and the optical reading port 9 detect high-level light.

As described above, the hologram film 3 is changed to α
For all angles of light, set the reflected light level to be low, for β angle light, some have a higher reflected light level, others have a lower reflected light level By setting to, conventional barcode data can be obtained from the optical reading port 7, and extended data can be obtained from the optical reading port 9.

FIG. 4 is a graph showing an example of data obtained by the present embodiment. FIG. 4 (I) shows conventional bar code data obtained at the optical reading port 7, and FIG. 4 (II).
Indicates extended data obtained at the optical reading port 9. The resulting data is digitized and used to decrypt the assigned information.

FIG. 5 is an explanatory view showing a modification of the present embodiment. As shown in FIG. 5, a black bar 1 is arranged in the same manner as in the prior art, and a hologram film 10 is arranged in a portion which was a conventional space. The hologram film barcode 11 may be configured as follows. [Second Embodiment] FIG. 6 is an explanatory view showing the present embodiment, and is a perspective view of a hologram film barcode. As shown in FIG. 6, a hologram film barcode 13 is formed by using a hologram film 12 instead of the conventional black bar and space. However,
The reflection angle of the hologram film 12 differs in a plurality of directions for each region.

FIG. 7 is a perspective explanatory view showing the operation of the present embodiment, and the operation of the present embodiment will be described with reference to FIG. The optical reading device 5 moves in the longitudinal direction of the barcode (for example, scanning while moving from left to right in FIG. 7). At this time, the light source 6 and the light source 8 irradiate the bar code surface at a predetermined angle.

A first angle (α) which is the angle of the first light source 6
Corner) is substantially perpendicular to the bar code surface, and as shown by the solid line arrow in the figure, the reflected light from the bar code surface
And the level of the reflected light in the scanning direction is detected. The second angle (β angle) which is the angle of the second light source 8 is an angle from an oblique direction different from the α angle. As shown by the dashed arrow in the figure, the reflected light from the barcode surface enters the second light reading port 9 and detects the level of the reflected light in the scanning direction.

Since the hologram film 12 can obtain light and dark by interference of light in a certain direction, even if the same hologram film 12 is used, if the hologram film 12 is arranged in a different direction, the intensity of reflected light is different. The hologram barcode according to the present embodiment has a high reflected light level only for light at the β angle (shown as 12a), and has a high reflected light level only for light at the α angle (shown as 12b). ), The reflected light level is low for both the α-angle and β-angle light (12
Indicated as c. ) Of three types of hologram films 12.

By scanning this hologram barcode, conventional barcode data and extended barcode data can be obtained. FIG. 8 is a graph showing an example of data obtained according to the present embodiment, and FIG.
8 shows conventional barcode data obtained at the optical reading port 7, and FIG. 8 (II) shows extended data obtained at the optical reading port 9.

The obtained data is digitized and used for decoding the assigned information. FIG. 9 is an explanatory view showing a modification of the present embodiment. As shown in FIG. 9, a part of the hologram barcode is used as a normal reflection film 14 (having the same incident angle and reflection angle) as the hologram film bar. The code 15 may be configured.

Further, if the film is made transparent and sealed, it is not necessary to provide a special barcode printing area as in the prior art, and the hologram film barcode of the present invention can be applied to a normal printing surface. In the above-described first and second embodiments, an example is described in which the α angle is substantially vertical so that only the barcode data portion can be read even when a conventional optical reading device is used. Although described, the angle is not limited to this, and the α angle can be set arbitrarily (however, α ≠ β).

[0021]

As described in detail above, a hologram barcode using a hologram film is read by an optical reader capable of scanning by irradiating light of the first and second angles, respectively, to obtain a normal hologram barcode. In addition to obtaining barcode data, it is also possible to obtain extended data, and it is possible to add a large amount of information to a limited barcode surface, and the amount of information is insufficient with conventional barcodes This has the effect of being applicable to various fields.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a first embodiment.

FIG. 2 is a side view showing the optical reading device according to the embodiment;

FIG. 3 is a perspective explanatory view showing the operation of the first embodiment.

FIG. 4 is a graph showing an example of data obtained according to the first embodiment;

FIG. 5 is an explanatory diagram showing a modification of the first embodiment.

FIG. 6 is an explanatory view showing a second embodiment.

FIG. 7 is an explanatory perspective view showing the operation of the second embodiment.

FIG. 8 is a graph showing an example of data obtained according to the second embodiment.

FIG. 9 is an explanatory diagram showing a modification of the second embodiment.

FIG. 10 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 Reference Signs List 3 hologram film 4 hologram film barcode 5 optical reader 6 first light source 7 first light reading port 8 second light source 9 second light reading port 10 hologram film 11 hologram film barcode 12 hologram film 13 hologram film Barcode 14 Reflective film 15 Hologram film barcode

Claims (3)

[Claims] 1. A hologram film barcode comprising a plurality of hologram film bands arranged in parallel in a barcode shape. 2. The method according to claim 1, wherein the light reflected at a first angle reflects strong or weak reflected light and the light reflected at a second angle reflects strong or weak light. In this manner, the hologram film bands are selected and arranged in such a manner that the reflected light for light from the first angle becomes bar code data and the reflected light for light from the second angle becomes other data. A hologram film barcode characterized by the following. 3. An optical reading device for irradiating a medium with light and scanning while detecting the intensity of reflected light from the medium to read data, comprising: a first light source for irradiating the medium at a first angle; A first light reading port for detecting the intensity of light reflected by the light from the first light source hitting the medium; a second light source for irradiating the medium at a second angle; and a second light source. And a second optical reading port for detecting the intensity of reflected light reflected by the medium when the bar code data is acquired by the first optical reading port and other data is obtained from the second optical reading port. An optical reading device characterized by being able to acquire a.