CA944987A - Optical interference authenticating means - Google Patents

Optical interference authenticating means

Info

Publication number
CA944987A
CA944987A CA132,683A CA132683A CA944987A CA 944987 A CA944987 A CA 944987A CA 132683 A CA132683 A CA 132683A CA 944987 A CA944987 A CA 944987A
Authority
CA
Canada
Prior art keywords
optical interference
authenticating means
interference authenticating
optical
interference
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
CA132,683A
Other versions
CA132683S (en
Inventor
Kenneth M. Baird
Jerzy A. Dobrowolski
Philip D. Carman
Allan J. Waldorf
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.)
National Research Council of Canada
Original Assignee
National Research Council of Canada
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 National Research Council of Canada filed Critical National Research Council of Canada
Priority to CA132,683A priority Critical patent/CA944987A/en
Priority to GB2673A priority patent/GB1394021A/en
Priority to US400939A priority patent/US3858977A/en
Application granted granted Critical
Publication of CA944987A publication Critical patent/CA944987A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/28—Interference filters
    • G02B5/285—Interference filters comprising deposited thin solid films
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
    • G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
    • G07D7/12—Visible light, infrared or ultraviolet radiation
    • G07D7/1205—Testing spectral properties

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Optics & Photonics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Credit Cards Or The Like (AREA)
  • Optical Filters (AREA)
CA132,683A 1972-01-18 1972-01-18 Optical interference authenticating means Expired CA944987A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA132,683A CA944987A (en) 1972-01-18 1972-01-18 Optical interference authenticating means
GB2673A GB1394021A (en) 1972-01-18 1973-01-01 Optical interference authenticating arrangement
US400939A US3858977A (en) 1972-01-18 1973-09-26 Optical interference authenticating means

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA132,683A CA944987A (en) 1972-01-18 1972-01-18 Optical interference authenticating means

Publications (1)

Publication Number Publication Date
CA944987A true CA944987A (en) 1974-04-09

Family

ID=4092096

Family Applications (1)

Application Number Title Priority Date Filing Date
CA132,683A Expired CA944987A (en) 1972-01-18 1972-01-18 Optical interference authenticating means

Country Status (2)

Country Link
CA (1) CA944987A (en)
GB (1) GB1394021A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649462A (en) * 1984-10-12 1987-03-10 Canadian Patents And Development Limited Viewing angle color sensitive lighting accessory
US5271644A (en) * 1991-08-29 1993-12-21 Canadian Bank Note Company, Limited Security device comprising optically variable data and method for making the same

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4589686A (en) * 1980-11-05 1986-05-20 Mcgrew Stephen P Anticounterfeiting method and device
US4892385A (en) * 1981-02-19 1990-01-09 General Electric Company Sheet-material authenticated item with reflective-diffractive authenticating device
JPS58501318A (en) * 1981-08-24 1983-08-11 コモンウエルス　サイエンテイフイツク　アンド　インダストリアル　リサ−チ　オ−ガニゼ−シヨン Bank notes or other security tokens
US4832424A (en) * 1982-09-30 1989-05-23 Mcgrew Stephen P White-light viewable, cylindrical holograms and method of spatially filtering wavefronts
CN108196329B (en) * 2017-12-19 2020-05-01 中国航空工业集团公司洛阳电光设备研究所 Preparation method of medium-wave infrared medium reinforced metal high-reflection film
CN113147216B (en) * 2021-05-24 2022-09-13 中钞印制技术研究院有限公司 Optical anti-counterfeiting element, detection method and device thereof, manufacturing method and device thereof, and security article

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649462A (en) * 1984-10-12 1987-03-10 Canadian Patents And Development Limited Viewing angle color sensitive lighting accessory
US5271644A (en) * 1991-08-29 1993-12-21 Canadian Bank Note Company, Limited Security device comprising optically variable data and method for making the same

Also Published As

Publication number Publication date
GB1394021A (en) 1975-05-14

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