FR2138678B1 - - Google Patents
Info
- Publication number
- FR2138678B1 FR2138678B1 FR727216440A FR7216440A FR2138678B1 FR 2138678 B1 FR2138678 B1 FR 2138678B1 FR 727216440 A FR727216440 A FR 727216440A FR 7216440 A FR7216440 A FR 7216440A FR 2138678 B1 FR2138678 B1 FR 2138678B1
- Authority
- FR
- France
- 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
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3084—Automatic control in amplifiers having semiconductor devices in receivers or transmitters for electromagnetic waves other than radiowaves, e.g. lightwaves
-
- 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
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
- G01N21/8901—Optical details; Scanning details
- G01N21/8903—Optical details; Scanning details using a multiple detector array
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (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)
- Length Measuring Devices By Optical Means (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1634871A GB1379593A (en) | 1971-05-21 | 1971-05-21 | Device for sensing a moving sheet material for imperfections |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2138678A1 FR2138678A1 (fr) | 1973-01-05 |
FR2138678B1 true FR2138678B1 (fr) | 1973-07-13 |
Family
ID=10075663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR727216440A Expired FR2138678B1 (fr) | 1971-05-21 | 1972-05-03 |
Country Status (7)
Country | Link |
---|---|
US (1) | US3800148A (fr) |
BE (1) | BE782999A (fr) |
CA (1) | CA970451A (fr) |
DE (1) | DE2220592A1 (fr) |
FR (1) | FR2138678B1 (fr) |
GB (1) | GB1379593A (fr) |
IT (1) | IT967037B (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2445544C2 (de) * | 1974-09-24 | 1986-12-18 | Agfa-Gevaert Ag, 5090 Leverkusen | Verfahren und Vorrichtung zur Überprüfung eines fotografischen Filmes auf Rißstellen |
GB1551046A (en) * | 1975-08-27 | 1979-08-22 | Bell & Howell Ltd | Apparatus for determining the position of a spot of light on a plane surgace |
DE2808360C3 (de) * | 1978-02-27 | 1981-09-24 | Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch | Optische Vorrichtung zur Bestimmung des Lichtaustrittswinkels |
US4158778A (en) * | 1978-03-01 | 1979-06-19 | Armstrong Cork Company | Optoelectronic scanning device |
CH626460A5 (fr) * | 1978-12-01 | 1981-11-13 | Radioelectrique Comp Ind | |
US4380032A (en) * | 1980-04-25 | 1983-04-12 | Newell Research Corporation | Tape system with optically contrasting data marks |
JPS56154650A (en) * | 1980-04-30 | 1981-11-30 | Dainippon Screen Mfg Co Ltd | Measuring apparatus of film blackening quantity |
DE3712513A1 (de) * | 1987-04-13 | 1988-11-03 | Roth Electric Gmbh | Verfahren und vorrichtung zur erkennung von oberflaechenfehlern |
DE3805248A1 (de) * | 1988-02-19 | 1989-08-31 | Dietrich Luederitz | Elektronische folienbeobachtungseinrichtung |
WO2000031521A1 (fr) * | 1998-11-20 | 2000-06-02 | Honeywell Inc. | Systeme de controle de feuille en ligne a longueurs d'ondes multiples, sans balayage |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2812447A (en) * | 1956-05-18 | 1957-11-05 | Ca Nat Research Council | Flaw detector for continuous sheet material |
US3096443A (en) * | 1960-06-20 | 1963-07-02 | Jones & Laughlin Steel Corp | Electronic surface inspection system |
US3206606A (en) * | 1961-07-20 | 1965-09-14 | Eastman Kodak Co | Photosensitive inspection method and apparatus |
US3340400A (en) * | 1964-06-11 | 1967-09-05 | Api Instr Company | Dual channel flaw detector having phase comparison feedback for automatic balancing |
US3448279A (en) * | 1966-10-17 | 1969-06-03 | Lindly & Co Inc | Photoelectric defect detector having reflection test transmission test and edgewise test |
US3487222A (en) * | 1967-11-03 | 1969-12-30 | Bausch & Lomb | Automatic gain control for self-calibrating a detection system |
US3534402A (en) * | 1967-12-15 | 1970-10-13 | Honeywell Inc | Apparatus for determining the uniformity of web material |
US3584963A (en) * | 1968-12-27 | 1971-06-15 | Rca Corp | Optical flaw detector |
US3652791A (en) * | 1969-01-08 | 1972-03-28 | Xerox Corp | Circuitry for distinguishing between background and intelligence areas on a document |
US3577039A (en) * | 1969-01-28 | 1971-05-04 | Bendix Corp | Optical apparatus for flaw detection |
-
1971
- 1971-05-21 GB GB1634871A patent/GB1379593A/en not_active Expired
-
1972
- 1972-04-27 DE DE19722220592 patent/DE2220592A1/de active Pending
- 1972-04-28 IT IT86242/72A patent/IT967037B/it active
- 1972-05-03 FR FR727216440A patent/FR2138678B1/fr not_active Expired
- 1972-05-04 BE BE782999A patent/BE782999A/nl unknown
- 1972-05-10 CA CA141,826A patent/CA970451A/en not_active Expired
- 1972-05-19 US US00255087A patent/US3800148A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
GB1379593A (en) | 1975-01-02 |
DE2220592A1 (de) | 1972-12-07 |
US3800148A (en) | 1974-03-26 |
CA970451A (en) | 1975-07-01 |
FR2138678A1 (fr) | 1973-01-05 |
IT967037B (it) | 1974-02-28 |
BE782999A (nl) | 1972-11-06 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |