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JPS59231678A - Bar code reader - Google Patents

Bar code reader

Info

Publication number
JPS59231678A
JPS59231678A JP10714283A JP10714283A JPS59231678A JP S59231678 A JPS59231678 A JP S59231678A JP 10714283 A JP10714283 A JP 10714283A JP 10714283 A JP10714283 A JP 10714283A JP S59231678 A JPS59231678 A JP S59231678A
Authority
JP
Japan
Prior art keywords
light beams
light
bar code
disk
facet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10714283A
Other languages
Japanese (ja)
Inventor
Shunji Kitagawa
俊二 北川
Fumio Yamagishi
文雄 山岸
Kozo Yamazaki
行造 山崎
Shinya Hasegawa
信也 長谷川
Hiroyuki Ikeda
池田　弘之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10714283A priority Critical patent/JPS59231678A/en
Publication of JPS59231678A publication Critical patent/JPS59231678A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10861—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices sensing of data fields affixed to objects or articles, e.g. coded labels
    • G06K7/10871—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices sensing of data fields affixed to objects or articles, e.g. coded labels randomly oriented data-fields, code-marks therefore, e.g. concentric circles-code

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)

Abstract

PURPOSE:To obtain a bar code reader which obtains data with higher efficiency and reads at a high read rate by scanning plural light beams on a bar code simultaneously, and detecting respective scattered light beams. CONSTITUTION:A light beam 2 emitted by a light source 1 such as a laser is split into two light beams 21 and 22 by a beam splitter 3. The beam 21 is made incident to a hologram disk 4 as it is, and the beam 22 is reflected by reflecting mirrors 5 and 6 and is made incident to the disk 4. The disk 4 is divided into eight parts called facet and each incident light beam is scanned repeatedly every time the respective facet 41-48 pass. The light beams 21 and 22 are made incident to the facet 45 and 41 and are diffracted to be profected on the bar code through an optical system which is not shown in a figure; and projection light scattered by the surface is converged to the disk 4 and guided to sensors 9 and 10 through converging mirrors 7 and 8 provided on the optical paths of those light beams.

Description

【発明の詳細な説明】 （ａ１発明の技術分野 本発明はバーコード読取装置に係り、とくに読取り率が
向上されたバーコード装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a1) Technical Field of the Invention The present invention relates to a barcode reading device, and particularly to a barcode device with improved reading rate.

（ｂｌ技術の背景 一般に、Ｐ　ＯＳ　（Ｐｏｉｎｔ−ｏｆ−３ａｌｅ　）
ターミナル等におけるデータ入力においては、商品に添
付されたラベル上に磁気的あるいは光学的に記録された
バーコードを走査して該バーコード情報が読取られる。(Background of BL technology In general, POS (Point-of-3ale)
In inputting data at a terminal or the like, barcode information is read by scanning a barcode magnetically or optically recorded on a label attached to a product.

この場合、光学的読取り方式では過密２回以上の走査が
行われ、取得された複数のデータのうちに一致するもの
が存在する場合にこれを正しいと見なして以後の処理が
行われ、一方、所定回数の走査において取得されたデー
タのうちに一致したデータが存在しない場合には、再読
取りを指示する等の処理が行われる。In this case, the optical reading method performs two or more overcrowded scans, and if there is a match among the multiple pieces of data acquired, it is considered correct and subsequent processing is performed. If matching data does not exist among the data acquired in a predetermined number of scans, processing such as instructing re-reading is performed.

（Ｃ１従来技術と問題点 従来の光学的読取り方式のバーコード読取装置において
は、各時点でバーコードを走査する光ビームは１本であ
り、上記のように複数の読取りデータの照合を行う場合
には、必要なデータを取得するための時間の和だけの時
間を要することが避けられず、これが読取り率の限界と
なる欠点があった。(C1 Prior Art and Problems In conventional optical reading type barcode reading devices, only one light beam scans the barcode at each point in time, and when comparing multiple pieces of read data as described above) has the disadvantage that it inevitably takes the sum of the times to acquire the necessary data, which limits the reading rate.

（ｄ１発明の目的 本発明は、バーコード上に同時に複数の光ビームを走査
してデータの取得効率を高めることにより、読取り率の
高いバーコード読取装置を擢供可ｆｌａとするごとを目
的とする。(d1 Purpose of the Invention The purpose of the present invention is to simultaneously scan a barcode with a plurality of light beams to increase data acquisition efficiency, thereby making it possible to provide a barcode reading device with a high reading rate. do.

（ｅ１発明の構成 本発明は、光ビームを走査して読取るパーコード読取装
置において、同時に複数の光ビームを走査する手段と、
バーコードラベルで散乱されたそれぞれの光ビームを検
出する手段を設けたことを特徴とする。(e1 Structure of the Invention The present invention provides a Parcode reading device that scans and reads a light beam, which includes means for simultaneously scanning a plurality of light beams;
The present invention is characterized by providing means for detecting each light beam scattered by the barcode label.

（ｆ１発明の実施例 以下に本発明の実施例を図面を参照して説明する。(Example of f1 invention Embodiments of the present invention will be described below with reference to the drawings.

図は本発明に係るバーコード読取装置における光ビーム
走査部の構成概要を示し、光ビーム偏向機構としてホロ
グラムディスクを用いている。ホログラムディスクはそ
の表面の感光層に一種の回折格子をなす干渉縞が形成さ
れており、該ホログラムディスクを回転することにより
該干渉縞が移動するのにともなって入射光ビームを偏向
する。The figure shows an outline of the configuration of a light beam scanning section in a barcode reading device according to the present invention, in which a hologram disk is used as a light beam deflection mechanism. A hologram disk has interference fringes forming a kind of diffraction grating formed on a photosensitive layer on its surface, and as the hologram disk is rotated, the interference fringes move and an incident light beam is deflected.

同図において、例えばレーザ等の光源１から出射された
光ビーム２は、例えばハーフミラ−のよウナヒームスプ
リソタ３により２つの光ビーム２１および２２に分離さ
れる。図においては光ビーム２１はそのままホログラム
ディスク４に入射し、光ビーム２２は反射鏡５および６
で反射されてホログラムディスク４に入射する。図にお
いてホログラムディスク４はファセットと称される８つ
の部分に分割されており、入射する光ビームはそれぞれ
のファセット４１．４２．４３、・・・、４８が通過す
るごとに走査が繰り返される。In the figure, a light beam 2 emitted from a light source 1 such as a laser is separated into two light beams 21 and 22 by an unahim splinter 3 such as a half mirror. In the figure, the light beam 21 is directly incident on the hologram disk 4, and the light beam 22 is reflected on the reflecting mirrors 5 and 6.
The light is reflected by the beam and enters the hologram disk 4. In the figure, the hologram disk 4 is divided into eight parts called facets, and the incident light beam is repeatedly scanned each time each facet 41, 42, 43, . . . , 48 passes.

上記のようにして、光ビーム２１および２２はそれぞれ
ファセット４５およびファセット４１に入射して回折さ
れ、図示しない光学系によってバーコード（図示省略）
上に投射され、該バーコード面で散乱された該投射光ビ
ームはホログラムディスク４により、正確には光ビーム
２１の散乱光はファセット４５により、また光ビーム２
２の散乱光はファセット４１により集光され、それぞれ
の光ビームの光路上に設けられている集光鏡７および８
によってセン−４）−９および１０に導かれる。As described above, the light beams 21 and 22 are incident on the facet 45 and the facet 41, respectively, and are diffracted, and a bar code (not shown) is generated by an optical system (not shown).
The projected light beam projected onto the barcode surface and scattered by the barcode surface is transmitted by the hologram disc 4, more precisely, the scattered light of the light beam 21 is transmitted by the facet 45, and the light beam 2
The scattered light of 2 is collected by a facet 41, and collected by focusing mirrors 7 and 8 provided on the optical path of each light beam.
This leads to Sen-4)-9 and 10.

図の場合には２つの光ビーム２１および２２を使用して
１つのバーコードに対して同時に２つのデータが取得さ
れる。すなわち従来の１つの光ビームを使用した場合の
２倍のデータが取得され、これらの間に一致するデータ
が存在することが確認されると読取り完了となり、次の
処理が開始される。In the case shown, two data are acquired simultaneously for one barcode using two light beams 21 and 22. In other words, twice as much data as in the case of using one conventional light beam is acquired, and when it is confirmed that matching data exists between them, reading is completed and the next process is started.

したがって、一致するデータが取得されるまでの時間が
従来の１／２となり、一致するデータが取得できなかっ
た場合の再施行の時間を含めれば、読取り効率は２倍以
上に向上されることになるのである。Therefore, the time it takes to obtain matching data is halved compared to the conventional method, and if you include the time for re-execution when matching data cannot be obtained, the reading efficiency is more than doubled. It will become.

２つ以上の光ビームを使用することにより、さらに読取
り効率を高めることが可能であるのはもちろんである。Of course, it is possible to further increase the reading efficiency by using two or more light beams.

また、光ビームの偏向機構として回転鏡あるいは振動鏡
を用いた場合においても、同様に複数の光ビームを用い
ることにより、読取り効率を向上可能であることば明ら
かである。Furthermore, even when a rotating mirror or a vibrating mirror is used as a light beam deflection mechanism, it is obvious that reading efficiency can be improved by similarly using a plurality of light beams.

（ａ発明の効果 本発明によれば、バーコード読取装置におけるデータ取
得効率を向上可能とする効果がある。(A) Effect of the Invention According to the present invention, there is an effect that data acquisition efficiency in a barcode reading device can be improved.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明に係るバーコード読取装置における光ビーム
走査機構の一例を示す図である。 図において、ｌは光源、２と２１および２２は光ビーム
、３はビームスプリフタ、４はホログラムディスク、５
および６は反射鏡、７および８は集光鏡、９およびｌＯ
はセンサ、４１から４８まではファセットである。The figure is a diagram showing an example of a light beam scanning mechanism in a barcode reading device according to the present invention. In the figure, l is a light source, 2, 21, and 22 are light beams, 3 is a beam splitter, 4 is a hologram disk, and 5
and 6 is a reflecting mirror, 7 and 8 are condensing mirrors, 9 and lO
is a sensor, and 41 to 48 are facets.

Claims (1)

【特許請求の範囲】[Claims] 光ビームを走査して読取るバーコード読取装置において
、同時に複数の光ビームを走査する手段と、バーコード
ラベルで散乱されたそれぞれの光ビームを検出する手段
を設けたことを特徴とするバーコード読取装置。A barcode reading device that scans and reads light beams, characterized in that it includes means for simultaneously scanning a plurality of light beams and means for detecting each light beam scattered by a barcode label. Device.
JP10714283A 1983-06-15 1983-06-15 Bar code reader Pending JPS59231678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10714283A JPS59231678A (en) 1983-06-15 1983-06-15 Bar code reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10714283A JPS59231678A (en) 1983-06-15 1983-06-15 Bar code reader

Publications (1)

Publication Number Publication Date
JPS59231678A true JPS59231678A (en) 1984-12-26

Family

ID=14451573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10714283A Pending JPS59231678A (en) 1983-06-15 1983-06-15 Bar code reader

Country Status (1)

Country Link
JP (1) JPS59231678A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5028770A (en) * 1988-03-08 1991-07-02 Nec Corporation Bar code reading apparatus with laser selection based on a deflector position

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5028770A (en) * 1988-03-08 1991-07-02 Nec Corporation Bar code reading apparatus with laser selection based on a deflector position

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