GB1426230A - Retroreflecting assembly - Google Patents

Retroreflecting assembly

Info

Publication number
GB1426230A
GB1426230A GB2853173A GB2853173A GB1426230A GB 1426230 A GB1426230 A GB 1426230A GB 2853173 A GB2853173 A GB 2853173A GB 2853173 A GB2853173 A GB 2853173A GB 1426230 A GB1426230 A GB 1426230A
Authority
GB
United Kingdom
Prior art keywords
tetrahedra
retro
retroreflecting
june
assembly
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
GB2853173A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1426230A publication Critical patent/GB1426230A/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
    • G02B5/122—Reflex reflectors cube corner, trihedral or triple reflector type
    • G02B5/124—Reflex reflectors cube corner, trihedral or triple reflector type plural reflecting elements forming part of a unitary plate or sheet
    • 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

Landscapes

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

Abstract

1426230 Retro-reflectors L EIGENMANN 15 June 1973 [17 June 1972] 28531/73 Heading G2J A retro-reflector comprises a number of transparent cube-corner tetrahedra 26 arranged over part of the surface of a transparent sphere 20 through which light travels before being retroreflected. The sphere 20 may be glass and the tetrahedra may be formed by growing cubic crystals of e.g. clacium oxalate or spinel on the suface of the glass. Alternatively the reflector may be machined or dieformed.
GB2853173A 1972-06-17 1973-06-15 Retroreflecting assembly Expired GB1426230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2584672A IT1044840B (en) 1972-06-17 1972-06-17 REFINEMENT TO REFLECTIVE MATERIALS IN PARTICULAR FOR ROAD SIGNAGE AND RELATED MATERIALS PERFECTED WITH SECONDARY OPTICAL RETURN BY MEANS OF CUSIC EDGE PRISMS

Publications (1)

Publication Number Publication Date
GB1426230A true GB1426230A (en) 1976-02-25

Family

ID=11217906

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2853173A Expired GB1426230A (en) 1972-06-17 1973-06-15 Retroreflecting assembly

Country Status (3)

Country Link
CA (1) CA988064A (en)
GB (1) GB1426230A (en)
IT (1) IT1044840B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225123A2 (en) * 1985-11-21 1987-06-10 Minnesota Mining And Manufacturing Company A totally internally reflecting thin, flexible film
USRE40227E1 (en) 1985-11-21 2008-04-08 3M Innovative Properties Company Totally internally reflecting thin, flexible film
EP3514581A1 (en) * 2018-01-22 2019-07-24 IMOS Gubela GmbH Retroreflector with a curved surface
EP4198494A1 (en) * 2021-12-20 2023-06-21 M & C TechGroup Germany GmbH Use of spinel, polycrystalline aluminium oxide or aluminium oxynitride as a reflection element in a measuring device for the absorption spectroscopy of gas, this measuring device and method for absorption spectroscopy using the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0225123A2 (en) * 1985-11-21 1987-06-10 Minnesota Mining And Manufacturing Company A totally internally reflecting thin, flexible film
EP0225123A3 (en) * 1985-11-21 1989-07-19 Minnesota Mining And Manufacturing Company A totally internally reflecting thin, flexible film
JP3262230B2 (en) 1985-11-21 2002-03-04 ミネソタ マイニング アンド マニュファクチュアリング コンパニー Ray conduit
USRE40227E1 (en) 1985-11-21 2008-04-08 3M Innovative Properties Company Totally internally reflecting thin, flexible film
EP3514581A1 (en) * 2018-01-22 2019-07-24 IMOS Gubela GmbH Retroreflector with a curved surface
US11029456B2 (en) 2018-01-22 2021-06-08 Imos Gubela Gmbh Retroreflector having a curved surface
EP4198494A1 (en) * 2021-12-20 2023-06-21 M & C TechGroup Germany GmbH Use of spinel, polycrystalline aluminium oxide or aluminium oxynitride as a reflection element in a measuring device for the absorption spectroscopy of gas, this measuring device and method for absorption spectroscopy using the same
WO2023118171A1 (en) * 2021-12-20 2023-06-29 M&C Techgroup Germany Gmbh Spinel, polycrystalline aluminium oxide or aluminium oxynitride as a reflective element in a measuring device for absorption-spectroscopic gas measurement, and absorption-spectroscopic method

Also Published As

Publication number Publication date
IT1044840B (en) 1980-04-21
CA988064A (en) 1976-04-27

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Legal Events

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