GB988440A - Method and apparatus for detecting a mark on a translucent sheet - Google Patents

Method and apparatus for detecting a mark on a translucent sheet

Info

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
Application number
GB4543763A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie de Saint Gobain SA
Original Assignee
Compagnie de Saint Gobain SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie de Saint Gobain SA filed Critical Compagnie de Saint Gobain SA
Publication of GB988440A publication Critical patent/GB988440A/en
Expired legal-status Critical Current

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
    • G01N21/55—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)
GB4543763A 1962-11-16 1963-11-18 Method and apparatus for detecting a mark on a translucent sheet Expired GB988440A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR915676A FR1347223A (fr) 1962-11-16 1962-11-16 Procédé et dispositif pour détecter un tracé sur une feuille translucide

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 (enExample)
ES (1) ES293559A1 (enExample)
FR (1) FR1347223A (enExample)
GB (1) GB988440A (enExample)

Also Published As

Publication number Publication date
FR1347223A (fr) 1963-12-27
ES293559A1 (es) 1964-04-16
BE639792A (enExample)

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