CA1129549A - Lecteur optique de signaux de seuil - Google Patents

Lecteur optique de signaux de seuil

Info

Publication number
CA1129549A
CA1129549A CA334,234A CA334234A CA1129549A CA 1129549 A CA1129549 A CA 1129549A CA 334234 A CA334234 A CA 334234A CA 1129549 A CA1129549 A CA 1129549A
Authority
CA
Canada
Prior art keywords
signal
card
optical
adaptive
adaptive threshold
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.)
Expired
Application number
CA334,234A
Other languages
English (en)
Inventor
Richard J. 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
Application granted granted Critical
Publication of CA1129549A publication Critical patent/CA1129549A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • Artificial Intelligence (AREA)
  • Toxicology (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Electronic Switches (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Credit Cards Or The Like (AREA)
CA334,234A 1978-09-18 1979-08-22 Lecteur optique de signaux de seuil Expired CA1129549A (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US94320178A 1978-09-18 1978-09-18
US943,201 1978-09-18
US036,686 1979-05-07
US06/036,686 US4230265A (en) 1979-05-07 1979-05-07 Adaptive threshold optical reader

Publications (1)

Publication Number Publication Date
CA1129549A true CA1129549A (fr) 1982-08-10

Family

ID=26713392

Family Applications (1)

Application Number Title Priority Date Filing Date
CA334,234A Expired CA1129549A (fr) 1978-09-18 1979-08-22 Lecteur optique de signaux de seuil

Country Status (11)

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

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3855635T2 (de) * 1987-02-12 1997-05-28 Dainippon Printing Co Ltd Methode zur datenspeicherung und -wiedergabe für eine optische karte
FR2650416B1 (fr) * 1989-07-28 1995-04-21 Adventure Systeme de transmission d'informations, objet portatif et lecteur utilisables dans un tel systeme
EP1026619A3 (fr) * 1999-02-04 2001-09-19 Matsushita Electronics Corporation Lecteur d'informations optiques et système de lecture d'informations optiques
JP2005072924A (ja) * 2003-08-25 2005-03-17 Nec Kansai Ltd 光電流・電圧変換回路
JP2005072925A (ja) 2003-08-25 2005-03-17 Nec Kansai Ltd 光電流・電圧変換回路
DE102004024038A1 (de) * 2004-05-10 2005-12-01 Gardena Manufacturing Gmbh Programmiereinrichtung und Lesegerät für Bewässerungseinrichtungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2100346A5 (fr) * 1970-07-14 1972-03-17 Honeywell Inf Systems Italia
DE2153910C3 (de) * 1971-10-29 1974-10-17 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zum Auswerten des Ausgangssignals einer optischen Meßeinrichtung
US3789215A (en) * 1972-09-08 1974-01-29 Ibm Photosensitive document detector with automatic compensation
US3872434A (en) * 1973-12-05 1975-03-18 Recognition Equipment Inc Dynamic sample-by-sample automatic gain control

Also Published As

Publication number Publication date
NL7906448A (nl) 1980-03-20
IT1120575B (it) 1986-03-26
DE2937315A1 (de) 1980-03-27
GB2031630A (en) 1980-04-23
GB2031630B (en) 1982-06-23
IT7950262A0 (it) 1979-09-14
AU528801B2 (en) 1983-05-12
AU5027079A (en) 1980-03-27
BR7905873A (pt) 1980-05-27
FR2436448A1 (fr) 1980-04-11
HK6783A (en) 1983-02-24
PH19179A (en) 1986-01-23
FR2436448B1 (fr) 1986-10-17
CH632098A5 (fr) 1982-09-15

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Legal Events

Date Code Title Description
MKEX Expiry