DE2425855A1 - Photoelectric reader unit for optically scanned patterns - has luminous diode and circular photocell - Google Patents

Photoelectric reader unit for optically scanned patterns - has luminous diode and circular photocell

Info

Publication number
DE2425855A1
DE2425855A1 DE19742425855 DE2425855A DE2425855A1 DE 2425855 A1 DE2425855 A1 DE 2425855A1 DE 19742425855 DE19742425855 DE 19742425855 DE 2425855 A DE2425855 A DE 2425855A DE 2425855 A1 DE2425855 A1 DE 2425855A1
Authority
DE
Germany
Prior art keywords
photocell
light
emitting diode
luminous diode
circular
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.)
Granted
Application number
DE19742425855
Other languages
German (de)
Other versions
DE2425855C2 (en
Inventor
Walter Prof Bruch
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.)
Deutsche Thomson oHG
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19742425855 priority Critical patent/DE2425855C2/en
Publication of DE2425855A1 publication Critical patent/DE2425855A1/en
Application granted granted Critical
Publication of DE2425855C2 publication Critical patent/DE2425855C2/en
Expired legal-status Critical Current

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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
    • G06K7/10841—Particularities of the light-sensitive elements

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)
  • Facsimile Scanning Arrangements (AREA)
  • Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)

Abstract

The luminous diode (5) is placed in the inner opening of the circular photocell (4) and both are designed as semiconductor bodies on the same sublayer. Between the luminous diode and the photocell there is a circular shield (6) which is so dimensioned that light from the luminous diode cannot reach the photocell directly. The unit can have a common terminal for the luminous diode and the photocell and two other terminals (9, 10) for the diode and the photocell. The photocell can be thicker than the luminous diode. This prevents light from the diode from reaching the photocell directly.

Description

Fotoelektrische Leseeinheit zum Lesen optisch abtastbarer Vorlagen Bei Geräten der elektrischen Nachrichtentechnik beste oft die Aufgabe, optisch auf einen Träger aufgebrachte Marken opto-elektronisch zu lesen. Es ist z.B. bekannt, ein Tonband auf der Rückseite mit optischen Marken zu versehen, die bestimmte Bandstellen markieren und mit einem optoelektronischen Wandler gelesen werden. Auch zum opto-elektronischen Lesen sonstiger Schriftstücke werden solche Einheiten benötigt.Photoelectric reading unit for reading optically scannable documents When it comes to electrical communications equipment, it is often the best job to look at it read marks applied to a carrier opto-electronically. For example, it is known to provide optical marks on the back of a tape, indicating certain parts of the tape mark and read with an optoelectronic converter. Also to the opto-electronic Reading other documents such units are required.

Es ist eine Einheit bekannt ('tHandbuch der Bildtelegraphie und des Fernsehens" von Fritz Schröter 1932 Seite 21), bei der das von einer Lichtquelle ausgehende Licht über optische Mittel auf die Vorlage geworfen und das von der Vorlage rflektierte Licht von einer Fotozelle aufgefangen wird. Die Fotozelle ist dabei ringförmig mit einer Öffnung ausgebildet, wobei das von der Lichtquelle ausgehende Licht durch diese Öffnung gelangt. Diese Einheit besteht also aus mehreren Teilen, die zueinander justiert werden müssen.It is a unit known ('tHandbuch der Bildtelegraphie and des Television "by Fritz Schröter 1932 page 21), in which the from a light source outgoing light thrown onto the template via optical means and that from the template reflected light is captured by a photocell. The photocell is included ring-shaped with an opening, the emanating from the light source Light passes through this opening. This unit consists of several parts, which have to be adjusted to each other.

Der Erfindung liegt die Aufgabe zugrunde, die einzelnen Teile so zu einer Einheit zusammenzufassen, daß keine Justierung mehr notwendig ist.The invention is based on the object of the individual parts to summarize a unit that no more adjustment is necessary.

Diese Aufgabe wird durch die im Anspruch 1 beschriebene Erfindung gelöst. Vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen angegeben.This object is achieved by the invention described in claim 1 solved. Advantageous embodiments of the invention are given in the subclaims.

Durch die erfindungsgemäße Lösung ergibt sich ein kleines kompaktes Bauteil, das sowohl die Leuchtdiode als auch die Fotozelle enthalt. Dieses Bauteil braucht dann nur in die richtige Lage zu der abzutastenden Vorlage gebracht zu werden, während eine Justierung zwischen Lichtquelle und Fotozelle nicht erforderlich ist Die Erfindung wird anhand der Zeichnung erläutert. Darin zeigen Figur 1 den prinzipiellen Aufbau der erfindungsgemäßen Einheit und Figur 2 eine besondere Ausführungsform der Erfindung.The solution according to the invention results in a small, compact one Component that contains both the light emitting diode and the photocell. This component then only needs to be brought into the correct position for the original to be scanned, while an adjustment between the light source and the photocell is not required The invention is explained with reference to the drawing. FIG. 1 shows the basic one Structure of the unit according to the invention and FIG. 2 shows a special embodiment the invention.

Figur 1 zeigt ein Tonband 1, das auf seiner Rückseite mit Marken 2 versehen ist. Diese Marken bestehen aus dunklen Streifen, die bestimmte Bandstellen markierten und optisch lesbar sind. Auf in n Halbleiter-Substrat 3 ist eine ringförmige FotozelleKals Halbleiterkörper aufgebracht. In der inneren Offnung der Fotozelle 4 ist eine Leuchtdiode 5, z B.FIG. 1 shows a tape 1 which is marked 2 on its rear side is provided. These marks consist of dark stripes that mark specific tape locations are marked and optically legible. On in n semiconductor substrate 3 is an annular Photocell Applied as a semiconductor body. In the inner opening of the photocell 4 is a light emitting diode 5, e.g.

eine Gallium-Arsenid-Diode, als Halbleiter auf das Substrat 3 aufgebracht. Zwischen Fotozelle 4 und Leuchtdiode 5 ist eine ringförmige Abschirmung 6 vorgesehen. Fotozelle 4 und Leuchtdiode 5 haben einen gemeinsamen Anschluß 8, der mit Erde verbunden ist. An den zweiten Einschluß 9 der Leuchtdiode 5 ist eine Batterie il angeschlossen, die die Diode 5 zum Leuchten bringt. Das von der Diode 5 ausgehende Licht läuft entlang den Linicn 7, wird an dem Tonband 1 reflektiert und trifft dann aus die ringförmige Fotozelle 4. Bei einem Transport des Tonbandes 1 in Richtung 12 werden dadurch an der Ausgangsklemme 10 der Fotozelle 4 Impulse 13 erzeugt, die den Marken 2 entsprechen. Die ringförmige Abschirmung 6 verhindert, daß das von der Leuchtdiode 5 ausgehende Licht auf direktem Wege zu der Fotozelle 4 gelangt.a gallium arsenide diode, applied to the substrate 3 as a semiconductor. An annular shield 6 is provided between the photocell 4 and the light-emitting diode 5. Photo cell 4 and light emitting diode 5 have a common connection 8, which is connected to earth is. A battery il is connected to the second inclusion 9 of the light-emitting diode 5, which makes the diode 5 glow. The light emanating from diode 5 runs along the lines 7, is reflected on the tape 1 and then hits the ring-shaped photocell 4. When the tape 1 is transported in direction 12 this generates 4 pulses 13 at the output terminal 10 of the photocell, which mark the 2 correspond. The annular shield 6 prevents that from the light emitting diode 5 outgoing light reaches the photocell 4 in a direct way.

Figur 2 ist die Fotozelle 4 dicker ausgebildet als die Leuchtdiode 5, so daß die Fotozelle 4 die Leuchtdiode 5 nach oben überragt. Dadurch wird verhindert, daß das von der Leuchtdiod-e 5 ausgehende Licht entlang der Linie 7 direkt, also nicht über das Tonband 1, auf die Fotozelle 4 gelangt. Die Abschirmung 6 gemäß Figur l kann dann entfallen. Die erfindungsgemäß Einheit stellt also einen kompakten tIalbleiterkörper dar, der nur mit den Anschlüßen 8,9,10 gemäß Figur versehen ist.FIG. 2, the photocell 4 is made thicker than the light-emitting diode 5, so that the photocell 4 protrudes above the light-emitting diode 5 upwards. This prevents that the light emanating from the LED-e 5 along the line 7 directly, that is does not reach the photocell 4 via tape 1. The shield 6 according to FIG l can then be omitted. The unit according to the invention thus constitutes a compact semiconductor body represents, which is only provided with the connections 8,9,10 according to the figure.

Claims (4)

PatentansprücheClaims 1. Fotoelektrische Leseeinheit zum Lesen optisch atjtastharer Vorlagen bestehend aus einer Licht auf die Vorlage werfenden Leuchtdiode und einer das von der Vorlage reflektierte Licht aufnehmenden ringförmigen Fotozelle, dadurch gekennzeichnet, daß die Leuchtdiode (5) in der inneren Öffnung der ringförmigen Fotozelle (4) angeordnet ist und beide als Halbleiterkörper auf demselben Substrat ausgebildet sind.1. Photoelectric reading unit for reading optically atjtastharer documents consisting of a light-emitting diode that throws light on the template and one of the original light-receiving ring-shaped photocell, characterized in, that the light-emitting diode (5) is arranged in the inner opening of the annular photocell (4) and both are formed as semiconductor bodies on the same substrate. 2. Einheit nach Anspruch 1, dadurch gekennzeichnet, daB zwischen der Leuchtdiode (5) und der Fotozelle (4) eine so bemessene ringförmige Abschirmung (6) vorgesehen ist, daß das Licht von der Leuchtdiode (5) nicht auf direkten Weg zur Fotozelle (4) gelangen kann.2. Unit according to claim 1, characterized in that between the Light-emitting diode (5) and the photocell (4) a ring-shaped shielding dimensioned in this way (6) it is provided that the light from the light emitting diode (5) is not on a direct path can reach the photocell (4). 3. Einheit nach Anspruch 1, dadurch gekennzeichnet, daß die Einheit eine für die Leuchtdiode (5) und die Fotozelle (4) gemeinsame Anschlußklemme (8) und zwei weitere Anschlußklemmen (9, 10) für die beuchtdiodc (5) bzw. die Fotozelle (4) aufweist 3. Unit according to claim 1, characterized in that the unit one for the light emitting diode (5) and the photocell (4) common connection terminal (8) and two further connection terminals (9, 10) for the beuchtdiodc (5) or the photocell (4) 4. Einheit nach Anspruch 1, dadurch gekennzeichnet, daß die Fotozelle (4) dicker ist als die Leuchtdiode (5).4. Unit according to claim 1, characterized in that the photocell (4) is thicker than the light emitting diode (5).
DE19742425855 1974-05-28 1974-05-28 Photoelectric reading unit for reading optically scannable documents Expired DE2425855C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19742425855 DE2425855C2 (en) 1974-05-28 1974-05-28 Photoelectric reading unit for reading optically scannable documents

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742425855 DE2425855C2 (en) 1974-05-28 1974-05-28 Photoelectric reading unit for reading optically scannable documents

Publications (2)

Publication Number Publication Date
DE2425855A1 true DE2425855A1 (en) 1975-12-11
DE2425855C2 DE2425855C2 (en) 1982-09-23

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3128187A1 (en) * 1981-07-16 1983-02-03 Joachim 8068 Pfaffenhofen Sieg OPTO-ELECTRONIC COMPONENT
EP0168699A2 (en) * 1984-07-20 1986-01-22 International Business Machines Corporation Electro-optical servo transducer head
EP0435109A2 (en) * 1989-12-22 1991-07-03 Nippon Steel Corporation A sensor assembly for sensing printed marks on a print medium
EP2124263A2 (en) * 2008-05-21 2009-11-25 Gwangju Institute of Science and Technology Reflection type optical sensor device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417234A (en) * 1962-06-21 1968-12-17 Svenska Dataregister Ab Record reading apparatus and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417234A (en) * 1962-06-21 1968-12-17 Svenska Dataregister Ab Record reading apparatus and method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3128187A1 (en) * 1981-07-16 1983-02-03 Joachim 8068 Pfaffenhofen Sieg OPTO-ELECTRONIC COMPONENT
EP0168699A2 (en) * 1984-07-20 1986-01-22 International Business Machines Corporation Electro-optical servo transducer head
EP0168699A3 (en) * 1984-07-20 1989-01-25 International Business Machines Corporation Electro-optical servo transducer head
EP0435109A2 (en) * 1989-12-22 1991-07-03 Nippon Steel Corporation A sensor assembly for sensing printed marks on a print medium
EP0435109A3 (en) * 1989-12-22 1992-10-14 Synergy Computer Graphics Corporation A sensor assembly for sensing printed marks on a print medium
EP2124263A2 (en) * 2008-05-21 2009-11-25 Gwangju Institute of Science and Technology Reflection type optical sensor device
EP2124263A3 (en) * 2008-05-21 2012-11-07 Gwangju Institute of Science and Technology Reflection type optical sensor device

Also Published As

Publication number Publication date
DE2425855C2 (en) 1982-09-23

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D2 Grant after examination
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Owner name: TELEFUNKEN FERNSEH UND RUNDFUNK GMBH, 3000 HANNOVE

8339 Ceased/non-payment of the annual fee