FR2436448A1 - FLEXIBLE THRESHOLD OPTICAL READER - Google Patents

FLEXIBLE THRESHOLD OPTICAL READER

Info

Publication number
FR2436448A1
FR2436448A1 FR7923108A FR7923108A FR2436448A1 FR 2436448 A1 FR2436448 A1 FR 2436448A1 FR 7923108 A FR7923108 A FR 7923108A FR 7923108 A FR7923108 A FR 7923108A FR 2436448 A1 FR2436448 A1 FR 2436448A1
Authority
FR
France
Prior art keywords
signal
optical
encoded information
threshold
optical reader
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
FR7923108A
Other languages
French (fr)
Other versions
FR2436448B1 (en
Inventor
Richard John Casaly
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.)
Transaction Technology Inc
Original Assignee
Transaction Technology Inc
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
Priority claimed from US06/036,686 external-priority patent/US4230265A/en
Application filed by Transaction Technology Inc filed Critical Transaction Technology Inc
Publication of FR2436448A1 publication Critical patent/FR2436448A1/en
Application granted granted Critical
Publication of FR2436448B1 publication Critical patent/FR2436448B1/en
Expired 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
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device
    • 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
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light

Abstract

L'invention concerne un lecteur optique à seuil souple pour détecter une information codée optique quand elle est placée dans un trajet optique. Selon l'invention, il comporte une source de lumière 18, un détecteur de lumière 22, produisant un signal de sortie selon l'énergie lumineuse qu'il détecte, un moyen 36, 38 sensible à ce signal de sortie qui, dans un premier état, produit un signal de seuil souple quand il n'y a pas d'information codée optique et dans un second état, il produit un signal d'information représentant le signal de sortie du détecteur quand il y a une information codée optique, un moyen 32 stockant le signal de seuil souple, et un moyen 28 sensible au signal de seuil souple stocké et à un signal d'information pour détecter la présence d'une information codée optique au-dessus d'un seuil. L'invention s'applique notamment aux cartes de crédit.A flexible threshold optical reader for detecting optical encoded information as it is placed in an optical path is provided. According to the invention, it comprises a light source 18, a light detector 22, producing an output signal according to the light energy that it detects, a means 36, 38 sensitive to this output signal which, in a first state, produces a soft threshold signal when there is no optical encoded information and in a second state, it produces an information signal representing the output signal of the detector when there is optical encoded information, a means 32 storing the soft threshold signal, and means 28 responsive to the stored soft threshold signal and to an information signal for detecting the presence of optical encoded information above a threshold. The invention applies in particular to credit cards.

FR7923108A 1978-09-18 1979-09-17 FLEXIBLE THRESHOLD OPTICAL READER Expired FR2436448B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94320178A 1978-09-18 1978-09-18
US06/036,686 US4230265A (en) 1979-05-07 1979-05-07 Adaptive threshold optical reader

Publications (2)

Publication Number Publication Date
FR2436448A1 true FR2436448A1 (en) 1980-04-11
FR2436448B1 FR2436448B1 (en) 1986-10-17

Family

ID=26713392

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7923108A Expired FR2436448B1 (en) 1978-09-18 1979-09-17 FLEXIBLE THRESHOLD OPTICAL READER

Country Status (11)

Country Link
AU (1) AU528801B2 (en)
BR (1) BR7905873A (en)
CA (1) CA1129549A (en)
CH (1) CH632098A5 (en)
DE (1) DE2937315A1 (en)
FR (1) FR2436448B1 (en)
GB (1) GB2031630B (en)
HK (1) HK6783A (en)
IT (1) IT1120575B (en)
NL (1) NL7906448A (en)
PH (1) PH19179A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650416A1 (en) * 1989-07-28 1991-02-01 Adventure INFORMATION TRANSMISSION SYSTEM, PORTABLE OBJECT AND READER FOR USE IN SUCH A SYSTEM

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU592930B2 (en) * 1987-02-12 1990-01-25 Dai Nippon Insatsu Kabushiki Kaisha Method for recording and reproducing data for an optical card
EP1026619A3 (en) * 1999-02-04 2001-09-19 Matsushita Electronics Corporation Optical information reader and optical information reading system
JP2005072924A (en) * 2003-08-25 2005-03-17 Nec Kansai Ltd Photoelectric current and voltage converting circuit
JP2005072925A (en) 2003-08-25 2005-03-17 Nec Kansai Ltd Photoelectric current and voltage converting circuit
DE102004024038A1 (en) * 2004-05-10 2005-12-01 Gardena Manufacturing Gmbh Programming device and reader for irrigation devices

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100346A5 (en) * 1970-07-14 1972-03-17 Honeywell Inf Systems Italia
DE2153910A1 (en) * 1971-10-29 1973-08-02 Licentia Gmbh ARRANGEMENT FOR EVALUATING THE OUTPUT SIGNAL OF A MEASURING DEVICE
FR2199400A5 (en) * 1972-09-08 1974-04-05 Ibm
US3872434A (en) * 1973-12-05 1975-03-18 Recognition Equipment Inc Dynamic sample-by-sample automatic gain control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100346A5 (en) * 1970-07-14 1972-03-17 Honeywell Inf Systems Italia
DE2153910A1 (en) * 1971-10-29 1973-08-02 Licentia Gmbh ARRANGEMENT FOR EVALUATING THE OUTPUT SIGNAL OF A MEASURING DEVICE
FR2199400A5 (en) * 1972-09-08 1974-04-05 Ibm
US3872434A (en) * 1973-12-05 1975-03-18 Recognition Equipment Inc Dynamic sample-by-sample automatic gain control

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/75 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2650416A1 (en) * 1989-07-28 1991-02-01 Adventure INFORMATION TRANSMISSION SYSTEM, PORTABLE OBJECT AND READER FOR USE IN SUCH A SYSTEM
WO1991002328A1 (en) * 1989-07-28 1991-02-21 Adventure Data transmission system, portable object and reader usable in such a system

Also Published As

Publication number Publication date
IT7950262A0 (en) 1979-09-14
GB2031630B (en) 1982-06-23
HK6783A (en) 1983-02-24
DE2937315A1 (en) 1980-03-27
AU5027079A (en) 1980-03-27
IT1120575B (en) 1986-03-26
NL7906448A (en) 1980-03-20
AU528801B2 (en) 1983-05-12
CH632098A5 (en) 1982-09-15
CA1129549A (en) 1982-08-10
GB2031630A (en) 1980-04-23
BR7905873A (en) 1980-05-27
FR2436448B1 (en) 1986-10-17
PH19179A (en) 1986-01-23

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