GB1229109A - - Google Patents

Info

Publication number
GB1229109A
GB1229109A GB1229109DA GB1229109A GB 1229109 A GB1229109 A GB 1229109A GB 1229109D A GB1229109D A GB 1229109DA GB 1229109 A GB1229109 A GB 1229109A
Authority
GB
United Kingdom
Prior art keywords
june
opposide
ricoh
headings
render
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
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 filed Critical
Publication of GB1229109A publication Critical patent/GB1229109A/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
    • G02B5/12—Reflex reflectors
    • G02B5/126—Reflex reflectors including curved refracting surface
    • G02B5/128—Reflex reflectors including curved refracting surface transparent spheres being embedded in matrix

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Road Signs Or Road Markings (AREA)

Abstract

1,229,109. Reflex reflectors; projection screens. RICOH K.K. June 17, 1969 [June 25, 1968], No.30493/69. Headings G2A and G2J. A transparent element 11 has two opposide partspherical surfaces 11a, 11b which have a common centre of curvature 0 but different radii and a reflective coating covering the part-spherical surface 11a that has the larger radius to render it internally reflective. A plurality of the elements may be arranged to form a road sign or a projection screen.
GB1229109D 1968-06-25 1969-06-17 Expired GB1229109A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4436368 1968-06-25

Publications (1)

Publication Number Publication Date
GB1229109A true GB1229109A (en) 1971-04-21

Family

ID=12689411

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1229109D Expired GB1229109A (en) 1968-06-25 1969-06-17

Country Status (3)

Country Link
DE (1) DE1932259A1 (en)
FR (1) FR2011644A1 (en)
GB (1) GB1229109A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0029611B1 (en) * 1979-11-27 1985-07-31 D. Swarovski & Co. Retroreflection plate
DE2947719C2 (en) * 1979-11-27 1981-08-27 D. Swarovski & Co., 6112 Wattens, Tirol Retroreflector plate
DE3011955C2 (en) * 1980-03-27 1982-05-13 D. Swarovski & Co., 6112 Wattens, Tirol Retroreflector sheet and process for making the same
DE3931022A1 (en) * 1989-09-16 1991-03-28 Hommelwerke Gmbh OPTICAL RETROR REFLECTOR

Also Published As

Publication number Publication date
DE1932259A1 (en) 1970-01-22
FR2011644A1 (en) 1970-03-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee