GB1429290A - Scanning - Google Patents
ScanningInfo
- Publication number
- GB1429290A GB1429290A GB5426571A GB5426571A GB1429290A GB 1429290 A GB1429290 A GB 1429290A GB 5426571 A GB5426571 A GB 5426571A GB 5426571 A GB5426571 A GB 5426571A GB 1429290 A GB1429290 A GB 1429290A
- Authority
- GB
- United Kingdom
- Prior art keywords
- web
- control
- scanning
- signal
- reference line
- 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
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
- G01N21/5907—Densitometers
- G01N21/5911—Densitometers of the scanning type
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
1429290 Scanning a web with a rotating block; automatic control of web position J T RILEY 23 Feb 1973 [23 Nov 1971] 54265/71 Headings G2J and G3R [Also in Division G1] In a device for scanning a web 20 light from a source 1 is caused to repeatedly scan across the web at a constant angle of incidence by a rotating glass block 4 and radiation reflected off the web is directed by a solid light guide, Figs. 3 and 5 (not shown), on to a photo-cell whose output is processed by an analyzing and control circuit Figs. 8 and 9 (not shown), to detect any changes in the web's surface characteristics (i.e. the position of a reference line running parallel to and adjacent to the edge of the web) in order to provide a control signal to adjust the movement of the web (i.e. control the running of the web so that the reference line is alway passing beneath the web in the same position relative to the device). A further photocell may be provided, Figs. 4 and 8 (not shown), at the edge of the web to provide a signal indicating the beginning and ending of each scan, the signal being used by the control circuit with the scanning signal to measure the time elapsed between them and to convert this to a D.C. voltage which is used for retro-active control of the web's position. A block diagram of a suitable electronic circuit, Fig. 8 (not shown), is disclosed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5426571A GB1429290A (en) | 1971-11-23 | 1971-11-23 | Scanning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5426571A GB1429290A (en) | 1971-11-23 | 1971-11-23 | Scanning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1429290A true GB1429290A (en) | 1976-03-24 |
Family
ID=10470442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5426571A Expired GB1429290A (en) | 1971-11-23 | 1971-11-23 | Scanning |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1429290A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232268A (en) * | 1989-05-18 | 1990-12-05 | Mitsubishi Electric Corp | "Optical deflector and display unit using the same" |
| US5189545A (en) * | 1989-05-18 | 1993-02-23 | Mitsubishi Denki Kabushiki Kaisha | Optical deflector and display unit using the same |
| US6088025A (en) * | 1995-08-24 | 2000-07-11 | Matsushita Electric Industrial Co., Ltd. | Terminal device with built-in image sensor |
-
1971
- 1971-11-23 GB GB5426571A patent/GB1429290A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232268A (en) * | 1989-05-18 | 1990-12-05 | Mitsubishi Electric Corp | "Optical deflector and display unit using the same" |
| US5189545A (en) * | 1989-05-18 | 1993-02-23 | Mitsubishi Denki Kabushiki Kaisha | Optical deflector and display unit using the same |
| US6088025A (en) * | 1995-08-24 | 2000-07-11 | Matsushita Electric Industrial Co., Ltd. | Terminal device with built-in image sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3096443A (en) | Electronic surface inspection system | |
| GB1421571A (en) | Apparatus for measuring the speed and direction of movement of an object | |
| ES8400525A1 (en) | Railway work machine | |
| US3364358A (en) | Measuring apparatus for measuring a linear dimension of a body | |
| ES470724A1 (en) | Web scanning apparatus | |
| GB806891A (en) | Methods and apparatus for testing material | |
| GB1371912A (en) | Web inspection apparatus | |
| GB1429290A (en) | Scanning | |
| US3060791A (en) | Geometrical gauging apparatus | |
| GB1246756A (en) | Measuring dimensions of objects | |
| GB963587A (en) | A device for indicating marks and the like on a surface | |
| GB1322087A (en) | Spectrum analysis systems using optical correlation techniques particularly useful in pulse modulated doppler radar systems | |
| US3881102A (en) | Electro-optical sensing apparatus | |
| GB1528195A (en) | Apparatus for the determination of extreme density values in a transparent original | |
| GB1366369A (en) | Detection of faults on surfaces | |
| GB1484148A (en) | Apparatus for determining the transverse position of a surface defect in a sheet material moving longitudinally | |
| GB1078703A (en) | Method and apparatus for data processing | |
| GB1523604A (en) | Method of measuring the roughness of a surface | |
| GB1426836A (en) | Method of and apparatus for measuring a light reflective measurement plane from a reference plane | |
| JPS56137102A (en) | Range finder | |
| GB1157880A (en) | Checking Device for Marks on a Continuously Moving Band | |
| US3792262A (en) | Scanning initiation position detecting device | |
| JPS57143764A (en) | Head position detector | |
| JPS57182112A (en) | Range detector | |
| JPS5694248A (en) | Detector for foreign matter on surface |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |