PT1258846E - FRESNEL LENS SEGMENTED - Google Patents

FRESNEL LENS SEGMENTED

Info

Publication number
PT1258846E
PT1258846E PT02010315T PT02010315T PT1258846E PT 1258846 E PT1258846 E PT 1258846E PT 02010315 T PT02010315 T PT 02010315T PT 02010315 T PT02010315 T PT 02010315T PT 1258846 E PT1258846 E PT 1258846E
Authority
PT
Portugal
Prior art keywords
segments
fresnel lens
segmented
lens
band
Prior art date
Application number
PT02010315T
Other languages
Portuguese (pt)
Inventor
Piero Camillo Gusi
Original Assignee
Vimar Spa
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 Vimar Spa filed Critical Vimar Spa
Publication of PT1258846E publication Critical patent/PT1258846E/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Lenses (AREA)
  • Inorganic Insulating Materials (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Abstract

A segmented Fresnel lens with a spherical surface is described, comprising a plurality of Fresnel lens segments able to concentrate the respective detection rays onto an optical sensor (10) disposed in the focal region (11) of the lens, the lens (1) having two bands one above the other (5, 6) on the outside, each with nine plastic segments (S), whilst said Fresnel lens segments or radiation segments are (17) in number, thus distributed from bottom to top on four bands one above the other: three segments in the bottom band (C), five segments in the middle band (B), six segments in the middle band (A) and three segments in the top band (D). <IMAGE>
PT02010315T 2001-05-17 2002-05-07 FRESNEL LENS SEGMENTED PT1258846E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2001MI001024A ITMI20011024A1 (en) 2001-05-17 2001-05-17 SEGMENTED FRESNEL LENS

Publications (1)

Publication Number Publication Date
PT1258846E true PT1258846E (en) 2005-04-29

Family

ID=11447684

Family Applications (1)

Application Number Title Priority Date Filing Date
PT02010315T PT1258846E (en) 2001-05-17 2002-05-07 FRESNEL LENS SEGMENTED

Country Status (6)

Country Link
EP (1) EP1258846B1 (en)
AT (1) ATE284563T1 (en)
DE (1) DE60202167T2 (en)
ES (1) ES2233741T3 (en)
IT (1) ITMI20011024A1 (en)
PT (1) PT1258846E (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10663628B1 (en) 2018-06-11 2020-05-26 Toyota Motor Engineering & Manufacturing North America, Inc. Cloaking devices with fresnel mirrors and plane mirrors and vehicles comprising the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0484293B1 (en) * 1990-10-29 1994-01-12 TEKNOX S.r.l. Infrared presence sensor
US5442178A (en) * 1994-03-18 1995-08-15 Hubbell Incorporated Cross-over field-of-view composite Fresnel lens for an infrared detection system

Also Published As

Publication number Publication date
DE60202167T2 (en) 2005-12-08
ES2233741T3 (en) 2005-06-16
ATE284563T1 (en) 2004-12-15
EP1258846A3 (en) 2003-05-21
EP1258846A2 (en) 2002-11-20
ITMI20011024A1 (en) 2002-11-17
DE60202167D1 (en) 2005-01-13
ITMI20011024A0 (en) 2001-05-17
EP1258846B1 (en) 2004-12-08

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