GB1406296A - Method and apparatus for measuring optical irregularities in an article - Google Patents
Method and apparatus for measuring optical irregularities in an articleInfo
- Publication number
- GB1406296A GB1406296A GB4376472A GB4376472A GB1406296A GB 1406296 A GB1406296 A GB 1406296A GB 4376472 A GB4376472 A GB 4376472A GB 4376472 A GB4376472 A GB 4376472A GB 1406296 A GB1406296 A GB 1406296A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sheet
- detector
- radiation
- sheet material
- optical irregularities
- 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
- G01N21/84—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
- G01N21/892—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles characterised by the flaw, defect or object feature examined
- G01N21/896—Optical defects in or on transparent materials, e.g. distortion, surface flaws in conveyed flat sheet or rod
Abstract
1406296 Investigating sheet material SAINTGOBAIN INDUSTRIES 21 Sept 1972 [24 Sept 1971] 43764/72 Heading G1A In a scanning apparatus for detecting optical irregularities in moving sheet material two slits 1, and 3 are twice as wide as the other and a lens 2, are arranged as shown so that when slit 1 is illuminated, a narrow beam of radiation impinges on the sheet material and is subsequently received by a differential photo-electrical cell 4 having two sensitive areas 5, 5a, the output signal of the differential photo-cell being a function of any displacement of the slit image (from AoBo to A<SP>1</SP> B<SP>1</SP>) due to any optical irregularities present The detector's output is fed to a recorder (35), Fig.6 (not shown) via a low pass filter, a high pass filter, a differentiator and a rectifier. A more detailed embodiment, Figs.6, 7, 8, 9, 10 and 11 (not shown), incorporating the above arrangement is disclosed. In another embodiment, Fig.4 (not shown) the slits &c. and the detector are on the same side of the sheet with a mirror on the other side so that the radiation beam passes through the sheet twice. In a modification of this, Fig.5 (not shown), without the mirror the detector is positioned to receive radiation reflected off the surface of the sheet facing the apparatus or the detector is positioned to receive radiation internally reflected off the "back" surface after radiation has entered the sheet.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7134556A FR2153817A5 (en) | 1971-09-24 | 1971-09-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1406296A true GB1406296A (en) | 1975-09-17 |
Family
ID=9083467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4376472A Expired GB1406296A (en) | 1971-09-24 | 1972-09-21 | Method and apparatus for measuring optical irregularities in an article |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS4842790A (en) |
| AR (1) | AR198958A1 (en) |
| AU (1) | AU4701672A (en) |
| BE (1) | BE789192A (en) |
| BR (1) | BR7206599D0 (en) |
| CA (1) | CA999065A (en) |
| DD (1) | DD99855A5 (en) |
| DE (1) | DE2246468A1 (en) |
| ES (1) | ES406936A1 (en) |
| FR (1) | FR2153817A5 (en) |
| GB (1) | GB1406296A (en) |
| HU (1) | HU166296B (en) |
| IT (1) | IT985523B (en) |
| SE (1) | SE386274B (en) |
| ZA (1) | ZA726393B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5531441A (en) * | 1978-08-28 | 1980-03-05 | Hitachi Plant Eng & Constr Co | Piping washing method |
| JPS5535985A (en) * | 1978-09-08 | 1980-03-13 | Hitachi Plant Eng & Constr Co | Piping washing method |
| JPS5653323Y2 (en) * | 1979-09-29 | 1981-12-11 | ||
| FR2591341B1 (en) * | 1985-12-10 | 1988-02-19 | Saint Gobain Vitrage | TECHNIQUE FOR DETECTING OPTICAL DEFECTS ON A GLASS PRODUCTION LINE |
| JP6683464B2 (en) * | 2015-12-07 | 2020-04-22 | 大和製罐株式会社 | Internal pressure inspection device for sealed containers |
-
0
- BE BE789192D patent/BE789192A/en unknown
-
1971
- 1971-09-24 FR FR7134556A patent/FR2153817A5/fr not_active Expired
-
1972
- 1972-09-18 HU HUSA2403A patent/HU166296B/hu unknown
- 1972-09-19 ZA ZA726393A patent/ZA726393B/en unknown
- 1972-09-19 SE SE7212095A patent/SE386274B/en unknown
- 1972-09-21 AR AR244206A patent/AR198958A1/en active
- 1972-09-21 CA CA152,244A patent/CA999065A/en not_active Expired
- 1972-09-21 JP JP47094184A patent/JPS4842790A/ja active Pending
- 1972-09-21 GB GB4376472A patent/GB1406296A/en not_active Expired
- 1972-09-22 DE DE2246468A patent/DE2246468A1/en active Pending
- 1972-09-22 AU AU47016/72A patent/AU4701672A/en not_active Expired
- 1972-09-22 BR BR006599/72A patent/BR7206599D0/en unknown
- 1972-09-22 ES ES406936A patent/ES406936A1/en not_active Expired
- 1972-09-22 DD DD165815A patent/DD99855A5/xx unknown
- 1972-09-23 IT IT70010/72A patent/IT985523B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| BE789192A (en) | 1973-03-22 |
| SE386274B (en) | 1976-08-02 |
| AU4701672A (en) | 1974-03-28 |
| AR198958A1 (en) | 1974-07-31 |
| ES406936A1 (en) | 1975-09-01 |
| CA999065A (en) | 1976-10-26 |
| JPS4842790A (en) | 1973-06-21 |
| IT985523B (en) | 1974-12-10 |
| HU166296B (en) | 1975-02-28 |
| FR2153817A5 (en) | 1973-05-04 |
| ZA726393B (en) | 1973-06-27 |
| BR7206599D0 (en) | 1973-07-19 |
| DD99855A5 (en) | 1973-08-20 |
| DE2246468A1 (en) | 1973-03-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3781531A (en) | Flaw detector system utilizing a laser scanner | |
| GB1156969A (en) | Non-Contacting Gauge | |
| US2812447A (en) | Flaw detector for continuous sheet material | |
| GB1513611A (en) | Surface profile measuring apparatus | |
| GB1466118A (en) | System for determining the nature of optical distortion in glass | |
| GB1352727A (en) | Method and device for detecting surface defects of a substan tially smooth material | |
| GB1430547A (en) | Inspection of containers | |
| GB1362319A (en) | Apparatus and method for measuring the width of a strip | |
| GB1341135A (en) | Apparatus for inspecting filamentary material | |
| GB1079618A (en) | Arrangements for determining the structure of thin, partly transparent materials suchas textile and paper materials | |
| GB1002390A (en) | Improvements in processes and apparatus for the electro-optical testing of webs or sheets of paper or like materials | |
| GB1254325A (en) | Apparatus for testing the continuity of photographic film | |
| GB1406296A (en) | Method and apparatus for measuring optical irregularities in an article | |
| GB1362320A (en) | Apparatus for detecting apertures in a web of material | |
| GB1213145A (en) | Apparatus for the detection of flaws in a transparent material | |
| GB1399706A (en) | Optical scanning device | |
| US3881102A (en) | Electro-optical sensing apparatus | |
| GB1320718A (en) | Colour sensitometric apparatus | |
| GB963587A (en) | A device for indicating marks and the like on a surface | |
| GB1195840A (en) | Scanning Interferometer Using Wedge for Producing Fringes | |
| GB1274297A (en) | Method and apparatus for detecting defects in glass | |
| GB1338611A (en) | Method and apparatus for detecting faults in sheet glass | |
| GB1395910A (en) | Method of and apparatus for gauging the sizes of articles | |
| GB1364269A (en) | Apparatus for examining reflecting surfaces | |
| US3792262A (en) | Scanning initiation position detecting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |