GB691465A - Improvements in photoelectric scanning - Google Patents

Improvements in photoelectric scanning

Info

Publication number
GB691465A
GB691465A GB427149A GB427149A GB691465A GB 691465 A GB691465 A GB 691465A GB 427149 A GB427149 A GB 427149A GB 427149 A GB427149 A GB 427149A GB 691465 A GB691465 A GB 691465A
Authority
GB
United Kingdom
Prior art keywords
card
photo
cell
column
aperture
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
GB427149A
Inventor
Francis Edward Williams
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.)
Post Office
Original Assignee
Post Office
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 Post Office filed Critical Post Office
Priority to GB427149A priority Critical patent/GB691465A/en
Publication of GB691465A publication Critical patent/GB691465A/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

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)
  • Character Input (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

691,465. Scanning records photo-electrically. POSTMASTER GENERAL. Feb. 15, 1950 (Feb. 16, 1949], No. 4271/49. Class 40 (iii). Marks on a record, postage stamps on envelopes &c. are detected by means of an oscillating mirror which produces an image of the mark on an aperture in a diaphragm behind which is situated a photo-cell, an alternating signal being obtained from the cell as a result of the image movement in and out of the aperture. As shown, light reflected from a column of a record card G is focused by lenses L1, L2 and mirror M which may be concave on to a row of apertures B2 behind each of which is situated a photo-cell (refs. 1 to 9). The mirror is mounted on the reed of an electromagnetic vibratory system O. Fig. 4 shows the image of a card column superimposed on apertures in the diaphragm A. If vertical column 4 is scanned, photo-cell 5 will give an alternating output. The card may then be advanced one column. Alternatively, all the spaces on the record card may be scanned simultaneously if a photo-cell and diaphragm aperture is provided for each card space. The card boundary lines may be marked in a colour to which the photocell is made insensitive, possibly by means of a filter. Specification 468,448 is referred to.
GB427149A 1949-02-16 1949-02-16 Improvements in photoelectric scanning Expired GB691465A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB427149A GB691465A (en) 1949-02-16 1949-02-16 Improvements in photoelectric scanning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB427149A GB691465A (en) 1949-02-16 1949-02-16 Improvements in photoelectric scanning

Publications (1)

Publication Number Publication Date
GB691465A true GB691465A (en) 1953-05-13

Family

ID=9773963

Family Applications (1)

Application Number Title Priority Date Filing Date
GB427149A Expired GB691465A (en) 1949-02-16 1949-02-16 Improvements in photoelectric scanning

Country Status (1)

Country Link
GB (1) GB691465A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274827B (en) * 1963-01-04 1968-08-08 Ex Cell O Corp Device for optical scanning of circular perforations in recording media
EP0425844A2 (en) * 1989-10-30 1991-05-08 Symbol Technologies, Inc. Power saving scanning arrangement
CN114593694A (en) * 2022-03-18 2022-06-07 烟台艾睿光电科技有限公司 Resonant scanning angle detection optical system and method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1274827B (en) * 1963-01-04 1968-08-08 Ex Cell O Corp Device for optical scanning of circular perforations in recording media
EP0425844A2 (en) * 1989-10-30 1991-05-08 Symbol Technologies, Inc. Power saving scanning arrangement
EP0425844A3 (en) * 1989-10-30 1991-12-11 Symbol Technologies, Inc. Power saving scanning arrangement
CN114593694A (en) * 2022-03-18 2022-06-07 烟台艾睿光电科技有限公司 Resonant scanning angle detection optical system and method
CN114593694B (en) * 2022-03-18 2024-04-30 烟台艾睿光电科技有限公司 Resonant scanning angle detection optical system and method

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