GB691465A - Improvements in photoelectric scanning - Google Patents
Improvements in photoelectric scanningInfo
- 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
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)
- Optical Recording Or Reproduction (AREA)
- Character Input (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.
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)
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 |
-
1949
- 1949-02-16 GB GB427149A patent/GB691465A/en not_active Expired
Cited By (5)
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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