CA2202759C - Dispositif d'observation et procede pour verifier simultanement les caracteristiques de changements de couleurs optiques d'un dispositif a variations optiques - Google Patents

Dispositif d'observation et procede pour verifier simultanement les caracteristiques de changements de couleurs optiques d'un dispositif a variations optiques Download PDF

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Publication number
CA2202759C
CA2202759C CA002202759A CA2202759A CA2202759C CA 2202759 C CA2202759 C CA 2202759C CA 002202759 A CA002202759 A CA 002202759A CA 2202759 A CA2202759 A CA 2202759A CA 2202759 C CA2202759 C CA 2202759C
Authority
CA
Canada
Prior art keywords
viewing
optically variable
angle
pattern
light
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 - Fee Related
Application number
CA002202759A
Other languages
English (en)
Other versions
CA2202759A1 (fr
Inventor
Charles T. Markantes
Roger W. Phillips
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.)
Viavi Solutions Inc
Original Assignee
Optical Coating Laboratory Inc
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 Optical Coating Laboratory Inc filed Critical Optical Coating Laboratory Inc
Priority claimed from PCT/US1995/013456 external-priority patent/WO1996013801A1/fr
Publication of CA2202759A1 publication Critical patent/CA2202759A1/fr
Application granted granted Critical
Publication of CA2202759C publication Critical patent/CA2202759C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G01N21/8803—Visual inspection

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)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Credit Cards Or The Like (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Spectrometry And Color Measurement (AREA)
CA002202759A 1994-10-27 1995-10-19 Dispositif d'observation et procede pour verifier simultanement les caracteristiques de changements de couleurs optiques d'un dispositif a variations optiques Expired - Fee Related CA2202759C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US33090294A 1994-10-27 1994-10-27
US08/330,902 1994-10-27
PCT/US1995/013456 WO1996013801A1 (fr) 1994-10-27 1995-10-19 Dispositif d'observation et procede pour verifier simultanement les caracteristiques de changements de couleurs optiques d'un dispositif a variations optiques

Publications (2)

Publication Number Publication Date
CA2202759A1 CA2202759A1 (fr) 1996-05-09
CA2202759C true CA2202759C (fr) 2006-08-01

Family

ID=36764281

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002202759A Expired - Fee Related CA2202759C (fr) 1994-10-27 1995-10-19 Dispositif d'observation et procede pour verifier simultanement les caracteristiques de changements de couleurs optiques d'un dispositif a variations optiques

Country Status (1)

Country Link
CA (1) CA2202759C (fr)

Also Published As

Publication number Publication date
CA2202759A1 (fr) 1996-05-09

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