GB1044950A - Improvements in or relating to optical elements for photo-electric sensing devices - Google Patents

Improvements in or relating to optical elements for photo-electric sensing devices

Info

Publication number
GB1044950A
GB1044950A GB4394162A GB4394162A GB1044950A GB 1044950 A GB1044950 A GB 1044950A GB 4394162 A GB4394162 A GB 4394162A GB 4394162 A GB4394162 A GB 4394162A GB 1044950 A GB1044950 A GB 1044950A
Authority
GB
United Kingdom
Prior art keywords
photo
relating
optical elements
sensing devices
light
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
GB4394162A
Inventor
David Michael Orme Slocombe
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.)
ENGLISH ELECTRIC LEO MARCONI C
Original Assignee
ENGLISH ELECTRIC LEO MARCONI C
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 ENGLISH ELECTRIC LEO MARCONI C filed Critical ENGLISH ELECTRIC LEO MARCONI C
Priority to GB4394162A priority Critical patent/GB1044950A/en
Publication of GB1044950A publication Critical patent/GB1044950A/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
    • G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms

Abstract

1,044,950. Sensing records. ENGLISH ELECTRICLEO-MARCONI COMPUTERS Ltd. Feb. 20, 1964 [Nov. 20, 1962], No. 43941/62. Heading G4M. [Also in Division G1] Light from a source (not shown) enters a transparent block 1 through surface 5 and falls on a record 13 after passing through surfaces 3a, 3b. Silicon photo-cells 8, 9 detect light which is reflected by the record 13 and which re-enters block 1 through respective surfaces 3a, 3b. An opaque barrier 4 prevents light entering at 3a from reaching photo-cell 9 and light entering at 3b from reaching photo-cell 8. As a data mark passes beneath surfaces 3a, 3b, spaced pulses of opposite polarity are produced by photo-cells 8, 9 and a circuit 16 rejects all other signals.
GB4394162A 1962-11-20 1962-11-20 Improvements in or relating to optical elements for photo-electric sensing devices Expired GB1044950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4394162A GB1044950A (en) 1962-11-20 1962-11-20 Improvements in or relating to optical elements for photo-electric sensing devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4394162A GB1044950A (en) 1962-11-20 1962-11-20 Improvements in or relating to optical elements for photo-electric sensing devices

Publications (1)

Publication Number Publication Date
GB1044950A true GB1044950A (en) 1966-10-05

Family

ID=10431039

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4394162A Expired GB1044950A (en) 1962-11-20 1962-11-20 Improvements in or relating to optical elements for photo-electric sensing devices

Country Status (1)

Country Link
GB (1) GB1044950A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487551A1 (en) * 1980-07-25 1982-01-29 Videoton Elekt Vallalat Opto-electronic code character reader - has light source with multiple photodetectors forming multi-linear or concentric array and light barrier for light path
EP0244092A1 (en) * 1986-04-28 1987-11-04 Sira Limited Optical apparatus and method for examining an object
EP0524336A1 (en) * 1991-07-25 1993-01-27 International Business Machines Corporation An optical device for sensing marks

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487551A1 (en) * 1980-07-25 1982-01-29 Videoton Elekt Vallalat Opto-electronic code character reader - has light source with multiple photodetectors forming multi-linear or concentric array and light barrier for light path
EP0244092A1 (en) * 1986-04-28 1987-11-04 Sira Limited Optical apparatus and method for examining an object
US4851696A (en) * 1986-04-28 1989-07-25 Sira Limited Apparatus for receiving radiation only within predetermined angular limits
EP0524336A1 (en) * 1991-07-25 1993-01-27 International Business Machines Corporation An optical device for sensing marks

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