JPS6065383A - Bar code reader - Google Patents

Abstract

PURPOSE:To improve the reading probability by dividing the light given from a light source into plural beams with dividing means such as a half mirror, a beam splitter, etc. and scanning each beam by a hologram disk. CONSTITUTION:The light given from a light source 12 is divided into plural beams by a half mirror or a beam splitter 13 and scanned by a hologram disk 19. These scan beams 22 and 22' are modulated by a bar code 24 and reflected. The reflected beams 23 and 23' pass again through the hologram 19 to be focused and reflected by perforated mirrors 15 and 16 to be detected by photodetectors 17 and 18 respectively. Therefore plural scan beams exist in a space above a window 21. This increases the number of scan beams crossing the bar codes and improves the reading probability.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a barcode reading device using a Schiff hologram scanner.

Prior Art and Problems Recently, barcode reading devices (devices that read codes that are a combination of several bars of different widths printed on the exterior of a product and input them into a computer) have been developed to save labor at supermarket registers. Fj) has come to be used.

For this device, a hologram scanner that uses a hologram as a light focusing element and a light controlling element to converge and settle the laser beam is suitable, so this hologram scanner, X I often get rejected.

FIG. 1 is a diagram for explaining the construction of a y-tree (4") to a barcode reading device, and in the same figure, 1 is an outer casing.

2 is a He-Ne laser as a light source; 3 is a perforated mirror for separating the signal beam from the transmitting source; 4 is a hologram disk having a plurality of zone grades; 5 is its drive motor; and 6 is a hologram disk. The window mounted on the operation surface of the housing, 7 is a scanning light, 8 is a signal-X, and 9 is a 9°C detector.

Reference numerals 10 and 10 each indicate a number 1 code printed on the exterior of the product.

The operation of this device is such that the scanning beam 07 that has passed through the perforated mirror 3' (L) is converged and deflected by the hologram disk 4, and is emitted from the window 6.1:, jl, and scans the code 10 on the product. ru. The scattered light 8 modulated by the barcode 10 is then converged by the hologram disk 4, reflected by the perforated mirror 3, and then detected by the light detector 9.

In this standard barcode reader, reading loss is 1J [
In order to improve the presence of the scanning beam (1 square in the area) However, the 97th increase in the number of revolutions of the hologram disk is the upper limit of the strength of the hologram disk. .

) Otsu 1” Eye of the Moon [” 9 Invention 0. In view of the above conventional problems, is it possible to increase the cost? The presence of a scanning beam in the reading area of the tin is a per-hole that improves the 1θ゛L capture rate by increasing the 41M rate.
1) The purpose is to provide a reading experience.

According to the present invention, there is provided a barcode reading device comprising a light source and a hologram disk fitting 11itt L for scanning the light from the source.
, the light from the source is split into beams using a splitting means such as a half mirror or a beam snoritter.
L, , each of its beams', 1 hologram disk is scanned by a bar code 11, tj, which is marked by li, by broadcasting to 2:'i. achieved.

Examples of the invention Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows a barcode reading device according to the present invention (11-
This is a diagram for explaining purposes only, and in the diagram, 11 is a housing;
12 is an I (c-ne, 1; 3Pi half mirror or beam silicate) as a light source; 14 is a mirror; 15
．． 16 is for scanning light and 1d principal amount! A mirror with a hole for tipping, 17.18 is a photodetector, 19 is a hologram disk, 20 is a motor for driving it, 21 is a window provided on the operation surface of the claw body, 22.22' is a scanning)'e , 23.2
3' indicates a signal light, and 24 indicates the entire bar code of the product.

In the present embodiment, as shown in FIG. of. The signal light beams 23 and z3' are reflected by the IL, and are collected by the mirrors 15 and 16 with holes. Back'0 detection'r:i
As detected in 17 and 1.8, respectively, stone C
There is.

This north sea urchin is composed of / ζ book'#: The distribution is always multiple C
The scanning light beams (Igl, lzl, two) are present in the space above the window 21, and the number of scans to cut the barcode by one yellow line increases compared to the conventional method. The probabilities are the same.

More than the effects of the invention, in detail 1 (as explained in 1), the bar 1 according to the present invention
- By dividing the light sound from the light source into multiple parts and depleting the fixed light by +61 simple ]1q configuration, the barcode reading probability can be increased by 2 times without increasing the cost. This is a great effect.

4. 1'U-side If'! jP-Na explanation 2! 'y
11'21 is a diagram for explaining a conventional barcode reading device, and FIG. 7132 is a barcode reading device according to the present invention.
: This is a diagram that does not explain everything.

1': On the ζ1 plane, 11 is the housing, 12 is the light source, 13
14 is a mirror, 15.16 is a hole, a side mirror, 17, 1st/yo light detector, 19 iqt Ho 1
21 is a window, 22.22' is a scanning light, 23.23' is a direct code light, and 24 is a no-code.

patent applicant Fujitsu Limited patent application agent Patent attorney Akira Aoki Patent Attorney Nishidate No. 11 1) Yukio Patent Attorney Yama 1] Akira

Claims (1)

[Claims] 1. In a barcode reading device that is equipped with a light source and a porodaram disk that scans the light from the light source,
A bar code reading device characterized in that the light from the C light source is divided into a plurality of beams by a dividing means such as a 71-fum mirror or a beam snoritter, and each of the beams is entirely scanned across a hologram disk.