JP2790365B2 - Record slip - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a record slip that records information on various articles, outdoor facilities, individuals, and the like.

[Conventional technology]

For example, in boxes packed with various commodities and deliverables, various information related to such articles are stored in various widths in order to calculate sales figures, manage inventory, and sort and streamline operations. A bar code label that is coded and recorded as a bar (stick) is affixed and widely used.

[Problem to be solved]

By the way, such a barcode label has a configuration in which a black bar is printed on a label usually formed of white paper or the like. However, in such a bar code label, if the bar portion is faded and thinned due to, for example, sunlight (ultraviolet rays), the information recorded on the bar code label may not be read reliably and accurately. There is. As described above, a bar code label obtained by simply printing a bar of black or the like on paper or the like has a problem in durability, weather resistance, and the like, and is particularly problematic for use outdoors.

Accordingly, the present invention has been made in view of the above-described conventional problems,
Provided is a recording form that can reliably and accurately record information over a long period of time and can read optical information without fear of occurrence of reading failure due to fading or the like. The purpose is to do so.

[Means for solving the problem]

That is, the record slip of the present invention is provided between the first and second polarizers whose polarization planes are displaced from each other by a predetermined angle, and the first and second polarizers having a shape corresponding to recording information. And a reflector for reflecting incident light.

[Action]

According to the recording sheet of the present invention, of the light incident on the first polarizing plate, only the light going to the reflector is reflected at a high reflectance, and the light traveling between the reflectors is mostly the second polarizing plate. The information can be read out optically from the difference in the amount of return light correlated with the presence or absence of the reflection plate.

〔Example〕

An embodiment of the present invention will be described below with reference to the accompanying drawings.

The recording slip of the present invention includes a first polarizing plate 1, a reflecting plate 2,
And the second polarizing plate 3.

The first polarizing plate 1 has a polarization axis 1a in the X direction perpendicular to the direction in which the reflecting plate 2 is disposed (Y direction) in this embodiment, and the transmission axis direction is constant. There is used a polymer having a predetermined thickness which is provided with dichroism by stretching in the direction to align the long chain-like polymer in the direction.

The reflecting plate 2 reflects the light incident toward the upper surface that is in contact with the first polarizing plate 1 with a high reflectance.
Arranged between the first and second polarizing plates 1 and 3 according to the recorded information.
A plate material such as aluminum (Al) or stainless steel whose upper surface is mirror-finished to increase the reflectance is used. The reflectors 2 are arranged at a width w and an arrangement interval t according to recording information, and as shown in FIG. 2, a space where the reflectors 2 are not provided (hereinafter referred to as a groove 4). ) Corresponds to a black bar portion in a conventional barcode label, and the portion of the reflector 2 corresponds to a white background portion.

The second polarizing plate 3 is formed of the same material as the first polarizing plate 1, but its transmission axis direction is a polarization direction along the Y direction orthogonal to the first polarization plate 1, that is, along the Y direction. Configuration.

Therefore, in this embodiment, for example, as shown in FIG. 3, a semiconductor laser (not shown) emits laser light (λ) of a predetermined wavelength toward the first polarizing plate 1.

Then, for example, the laser beam (α) traveling toward a predetermined region of the first polarizing plate 1 corresponding to the portion where the reflection plate 2 is present is partially absorbed by the first polarizing plate 1 with a predetermined polarization plane. The light reaches the reflector 2 after being scattered / reflected and partially transmitted. Then, the transmitted laser light is reflected at a high reflectance on the upper surface of the reflection plate 2, then returns to the first polarizing plate 1 again, passes through the first polarizing plate 1, and returns.

Further, the laser beam (β) transmitted through the first polarizing plate 1 toward the groove 4 where the reflection plate 2 does not exist, passes through the groove 4, and the phase of the incident light and the lattice phase of the polarizing plate 3 are π / Since the two are different, the incident light is scattered and reflected by the polarizing plate 3, and the reflection of the laser light (β) in the incident direction is greatly reduced.

In this manner, the width of the reflection plate 2 and the width of the groove 4 are optically detected from the difference in the amount of reflected light greatly different depending on the presence or absence of the reflection plate 2, and the recorded information is read from these data. Can be.

〔effect〕

As described above, according to the recording form according to the present invention, of the light incident on the first polarizing plate, only the light going to the reflecting plate is reflected at a high reflectance, and the groove between the reflecting plates is Most of the light traveling in the opposite direction is scattered and reflected by the second reflector, so that the reflection in the incident direction is greatly reduced. By optically detecting the difference in the amount of return light, information can be reliably and accurately obtained. The bar code can be read, and unlike a bar code on which a conventional black bar is printed, there is no fear of fading due to sunlight or the like, and it is suitable for long-term outdoor use.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a record slip according to the present invention, and FIG.
FIG. 3 is a plan view showing a record form according to the present invention, and FIG. 3 is an enlarged sectional view showing the operation of the record form according to the present invention. 1a: polarization plane, 1,3 ... first and third polarization planes, 2: reflection plate.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroyuki Ohata 1-10-12 Ueno, Taito-ku, Tokyo Inside Japan Electric Seiki Co., Ltd. (72) Inventor Hiroo Wakami 5-7-1 Shiba, Minato-ku, Tokyo (56) References JP-A-4-115386 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G06K 19/00

Claims (1)

(57) [Claims] 1. A first and a second polarizing plate having polarizing planes shifted from each other by a predetermined angle, and provided between the first and the second polarizing plate in a shape corresponding to recording information. And a reflector for reflecting incident light.