HK1002042A1 - Transparent optically variable device - Google Patents

Transparent optically variable device

Info

Publication number
HK1002042A1
HK1002042A1 HK98101052A HK98101052A HK1002042A1 HK 1002042 A1 HK1002042 A1 HK 1002042A1 HK 98101052 A HK98101052 A HK 98101052A HK 98101052 A HK98101052 A HK 98101052A HK 1002042 A1 HK1002042 A1 HK 1002042A1
Authority
HK
Hong Kong
Prior art keywords
optically variable
variable device
transparent optically
absorber layers
layer coating
Prior art date
Application number
HK98101052A
Other languages
English (en)
Inventor
Roger W Phillips
Paul G Coombs
Original Assignee
Flex Products 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 Flex Products Inc filed Critical Flex Products Inc
Publication of HK1002042A1 publication Critical patent/HK1002042A1/xx

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
    • G02B5/286—Interference filters comprising deposited thin solid films having four or fewer layers, e.g. for achieving a colour effect
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S283/00—Printed matter
    • Y10S283/902—Anti-photocopy

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Filters (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)
  • Prostheses (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Vehicle Body Suspensions (AREA)
  • Toys (AREA)
  • Endoscopes (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
HK98101052A 1989-04-26 1998-02-11 Transparent optically variable device HK1002042A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/343,893 US5278590A (en) 1989-04-26 1989-04-26 Transparent optically variable device

Publications (1)

Publication Number Publication Date
HK1002042A1 true HK1002042A1 (en) 1998-07-24

Family

ID=23348127

Family Applications (1)

Application Number Title Priority Date Filing Date
HK98101052A HK1002042A1 (en) 1989-04-26 1998-02-11 Transparent optically variable device

Country Status (10)

Country Link
US (1) US5278590A (el)
EP (1) EP0395410B1 (el)
JP (1) JP2831095B2 (el)
AT (1) ATE156916T1 (el)
CA (1) CA2015301C (el)
DE (1) DE69031240T2 (el)
DK (1) DK0395410T3 (el)
ES (1) ES2104582T3 (el)
GR (1) GR3024543T3 (el)
HK (1) HK1002042A1 (el)

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Also Published As

Publication number Publication date
EP0395410A2 (en) 1990-10-31
CA2015301A1 (en) 1990-10-26
DE69031240D1 (de) 1997-09-18
EP0395410B1 (en) 1997-08-13
ATE156916T1 (de) 1997-08-15
EP0395410A3 (en) 1991-02-27
DK0395410T3 (da) 1998-03-30
ES2104582T3 (es) 1997-10-16
CA2015301C (en) 1999-09-21
JPH03129303A (ja) 1991-06-03
DE69031240T2 (de) 1997-12-04
US5278590A (en) 1994-01-11
JP2831095B2 (ja) 1998-12-02
GR3024543T3 (en) 1997-12-31

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20070426