SE503429C2 - retroreflector - Google Patents

retroreflector

Info

Publication number
SE503429C2
SE503429C2 SE9402969A SE9402969A SE503429C2 SE 503429 C2 SE503429 C2 SE 503429C2 SE 9402969 A SE9402969 A SE 9402969A SE 9402969 A SE9402969 A SE 9402969A SE 503429 C2 SE503429 C2 SE 503429C2
Authority
SE
Sweden
Prior art keywords
microrelief
layer
mirror
lens
essentially
Prior art date
Application number
SE9402969A
Other languages
Swedish (sv)
Other versions
SE9402969D0 (en
SE9402969L (en
SE503429C3 (en
Inventor
Lars Danielsson
Staffan Niemann
Original Assignee
Industrimateriel Ab
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
Priority claimed from SE9401941A external-priority patent/SE9401941L/en
Application filed by Industrimateriel Ab filed Critical Industrimateriel Ab
Priority to SE9402969A priority Critical patent/SE503429C2/en
Publication of SE9402969D0 publication Critical patent/SE9402969D0/en
Priority to PCT/SE1995/000644 priority patent/WO1995034006A1/en
Publication of SE9402969L publication Critical patent/SE9402969L/en
Publication of SE503429C3 publication Critical patent/SE503429C3/en
Publication of SE503429C2 publication Critical patent/SE503429C2/en

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/12—Reflex reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/18—Diffraction gratings
    • G02B5/1876—Diffractive Fresnel lenses; Zone plates; Kinoforms
    • G02B5/188—Plurality of such optical elements formed in or on a supporting substrate
    • G02B5/1885—Arranged as a periodic array

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

The present invention concerns a retroreflective device that is composed of a number of optical microrelief elements. The retroreflector includes a first layer (12) consisting of a number of densely packed coplanar microrelief lenses, a second layer (14) consisting of a number of densely packed coplanar microrelief mirrors, coated with a reflecting layer (16) on the side opposite to the microrelief lenses, and a third layer (17) in-between the first and the second layer. The first and the second layer are oriented so as to exhibit a multitude of element pairs, each in the form of a microrelief lens (12) and a microrelief mirror (14) with essentially coinciding optical axes. The distance between a microrelief lens (12) and the corresponding microrelief mirror (14) is such that the microrelief mirror is located essentially in the focal plane of the microrelief lens. The microrelief mirror has its equivalent centre of curvature essentially in the centre of the corresponding microrelief lens.
SE9402969A 1994-06-06 1994-09-06 retroreflector SE503429C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9402969A SE503429C2 (en) 1994-06-06 1994-09-06 retroreflector
PCT/SE1995/000644 WO1995034006A1 (en) 1994-06-06 1995-06-02 Optical microrelief retroreflector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9401941A SE9401941L (en) 1994-06-06 1994-06-06 Diffractive retroreflector
SE9402969A SE503429C2 (en) 1994-06-06 1994-09-06 retroreflector

Publications (4)

Publication Number Publication Date
SE9402969D0 SE9402969D0 (en) 1994-09-06
SE9402969L SE9402969L (en) 1995-12-07
SE503429C3 SE503429C3 (en) 1995-12-07
SE503429C2 true SE503429C2 (en) 1996-06-10

Family

ID=26662071

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9402969A SE503429C2 (en) 1994-06-06 1994-09-06 retroreflector

Country Status (2)

Country Link
SE (1) SE503429C2 (en)
WO (1) WO1995034006A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9804247L (en) * 1998-12-08 2000-03-27 East Of Sweden Ab Color selecting retroreflector
SE9903089D0 (en) 1999-09-01 1999-09-01 Sandvik Ab Coated grooving or parting insert
US7727775B2 (en) 2004-10-25 2010-06-01 Willson Richard C Optical microlabels: shapes and reflectors
SE530341C2 (en) * 2006-08-22 2008-05-06 Rolling Optics Method and apparatus for angular determination with retroreflective film

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4036552A (en) * 1975-02-10 1977-07-19 Minnesota Mining And Manufacturing Company Retroreflective material made by recording a plurality of light interference fringe patterns
DK111293D0 (en) * 1993-10-04 1993-10-04 Franke Kell Erik RETROREFLECTIVE FOLI MATERIAL

Also Published As

Publication number Publication date
WO1995034006A1 (en) 1995-12-14
SE9402969D0 (en) 1994-09-06
SE9402969L (en) 1995-12-07

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