HK6783A - Adaptive threshold optical reader - Google Patents

Adaptive threshold optical reader

Info

Publication number
HK6783A
HK6783A HK67/83A HK6783A HK6783A HK 6783 A HK6783 A HK 6783A HK 67/83 A HK67/83 A HK 67/83A HK 6783 A HK6783 A HK 6783A HK 6783 A HK6783 A HK 6783A
Authority
HK
Hong Kong
Prior art keywords
card
holder
reference voltage
photodiode
dot
Prior art date
Application number
HK67/83A
Other languages
English (en)
Inventor
Richard John Casaly
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 HK6783A publication Critical patent/HK6783A/xx

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)
HK67/83A 1978-09-18 1983-02-24 Adaptive threshold optical reader HK6783A (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 (1)

Publication Number Publication Date
HK6783A true HK6783A (en) 1983-02-24

Family

ID=26713392

Family Applications (1)

Application Number Title Priority Date Filing Date
HK67/83A HK6783A (en) 1978-09-18 1983-02-24 Adaptive threshold optical reader

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
WO1988006339A1 (fr) * 1987-02-12 1988-08-25 Dai Nippon Insatsu Kabushiki Kaisha Procede d'enregistrement et de reproduction de donnees pour une carte optique
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
JP2005072925A (ja) 2003-08-25 2005-03-17 Nec Kansai Ltd 光電流・電圧変換回路
JP2005072924A (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
FR2436448B1 (fr) 1986-10-17
IT7950262A0 (it) 1979-09-14
IT1120575B (it) 1986-03-26
DE2937315A1 (de) 1980-03-27
CA1129549A (fr) 1982-08-10
AU5027079A (en) 1980-03-27
FR2436448A1 (fr) 1980-04-11
BR7905873A (pt) 1980-05-27
AU528801B2 (en) 1983-05-12
NL7906448A (nl) 1980-03-20
CH632098A5 (fr) 1982-09-15
GB2031630B (en) 1982-06-23
PH19179A (en) 1986-01-23
GB2031630A (en) 1980-04-23

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Legal Events

Date Code Title Description
PE Patent expired