GB988440A - Method and apparatus for detecting a mark on a translucent sheet - Google Patents
Method and apparatus for detecting a mark on a translucent sheetInfo
- Publication number
- GB988440A GB988440A GB4543763A GB4543763A GB988440A GB 988440 A GB988440 A GB 988440A GB 4543763 A GB4543763 A GB 4543763A GB 4543763 A GB4543763 A GB 4543763A GB 988440 A GB988440 A GB 988440A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- photo
- electric cell
- sheet
- mirror
- 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
- 239000011521 glass Substances 0.000 abstract 2
- 239000005357 flat glass Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
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
- G01N21/55—Specular reflectivity
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)
- Geophysics And Detection Of Objects (AREA)
Abstract
<PICT:0988440/C1/1> Score lines along which sheet glass is to be subsequently cut are detected by passing through the material a thin-beam of light and detecting variations in the amount of light passed when the beam encounters a line. Light from a lamp 4 illuminates a slit 19 to form a thin beam of light parallel to the lines on a glass sheet moving across the window 21. The light passing is reflected by a mirror 41 to pass back through the glass sheet to a photo-electric cell 30. Slits 50 and 40 are located in front of the mirror 41 and the photo-electric cell 30 respectively. Each score line gives rise to photo-electric cell pulses when it crosses the axes X-X1 and Y-Y1, and the first only of these may be selected by using it to trigger a monostable blanking circuit having a time constant greater than the interval between the pulses. The light source and photo-electric cell may be displaced through 90 degrees to a plane at right angles to the direction of sheet feed, in which case only one pulse is produced.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR915676A FR1347223A (en) | 1962-11-16 | 1962-11-16 | Method and device for detecting a pattern on a translucent sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB988440A true GB988440A (en) | 1965-04-07 |
Family
ID=8790964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4543763A Expired GB988440A (en) | 1962-11-16 | 1963-11-18 | Method and apparatus for detecting a mark on a translucent sheet |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE639792A (en) |
| ES (1) | ES293559A1 (en) |
| FR (1) | FR1347223A (en) |
| GB (1) | GB988440A (en) |
-
0
- BE BE639792D patent/BE639792A/xx unknown
-
1962
- 1962-11-16 FR FR915676A patent/FR1347223A/en not_active Expired
-
1963
- 1963-11-15 ES ES0293559A patent/ES293559A1/en not_active Expired
- 1963-11-18 GB GB4543763A patent/GB988440A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES293559A1 (en) | 1964-04-16 |
| FR1347223A (en) | 1963-12-27 |
| BE639792A (en) |
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