IT8123098A0 - Lente di fresnel perfezionata eprocedimento e stampo perl'ottenimento della stessa. - Google Patents

Lente di fresnel perfezionata eprocedimento e stampo perl'ottenimento della stessa.

Info

Publication number
IT8123098A0
IT8123098A0 IT8123098A IT2309881A IT8123098A0 IT 8123098 A0 IT8123098 A0 IT 8123098A0 IT 8123098 A IT8123098 A IT 8123098A IT 2309881 A IT2309881 A IT 2309881A IT 8123098 A0 IT8123098 A0 IT 8123098A0
Authority
IT
Italy
Prior art keywords
mold
procedure
obtaining
same
fresnel lens
Prior art date
Application number
IT8123098A
Other languages
English (en)
Other versions
IT1137756B (it
Inventor
Abramo Bordignon
Original Assignee
Atb 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 Atb Spa filed Critical Atb Spa
Priority to IT23098/81A priority Critical patent/IT1137756B/it
Publication of IT8123098A0 publication Critical patent/IT8123098A0/it
Priority to US06/307,127 priority patent/US4456344A/en
Application granted granted Critical
Publication of IT1137756B publication Critical patent/IT1137756B/it

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
IT23098/81A 1981-07-23 1981-07-23 Lente di fresnel prefezionata e procedimento e stampo per l'ottenimento della stessa IT1137756B (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
IT23098/81A IT1137756B (it) 1981-07-23 1981-07-23 Lente di fresnel prefezionata e procedimento e stampo per l'ottenimento della stessa
US06/307,127 US4456344A (en) 1981-07-23 1981-09-29 Fresnel lens, and a method and mold for manufacturing it

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT23098/81A IT1137756B (it) 1981-07-23 1981-07-23 Lente di fresnel prefezionata e procedimento e stampo per l'ottenimento della stessa

Publications (2)

Publication Number Publication Date
IT8123098A0 true IT8123098A0 (it) 1981-07-23
IT1137756B IT1137756B (it) 1986-09-10

Family

ID=11203759

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23098/81A IT1137756B (it) 1981-07-23 1981-07-23 Lente di fresnel prefezionata e procedimento e stampo per l'ottenimento della stessa

Country Status (2)

Country Link
US (1) US4456344A (it)
IT (1) IT1137756B (it)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61130903A (ja) * 1984-11-30 1986-06-18 Hitachi Ltd フレネルレンズとその製造方法
US4804970A (en) * 1985-05-06 1989-02-14 Harris Corp. Equiphase refractive antenna lens
US5235467A (en) * 1990-03-23 1993-08-10 Zeni Lite Buoy Co., Limited Cylindrical lens and a manufacturing method for the same
US5667291A (en) 1995-05-23 1997-09-16 Surgical Acuity, Inc. Illumination assembly for dental and medical applications
EP1396737A3 (en) * 1997-03-11 2004-12-29 Nihon Kohden Corporation Particle analyzer and composite lens formed by integrally joining plural lens elements of different focal points
JP2001318430A (ja) * 2000-05-10 2001-11-16 Kuraray Co Ltd 背面投射型スクリーン
KR100845536B1 (ko) * 2000-12-11 2008-07-10 다이니폰 인사츠 가부시키가이샤 프레넬 렌즈용 금형 가공 방법, 이 가공 방법에 의해 가공된 금형 및 프레넬 렌즈
US7736021B2 (en) * 2001-02-24 2010-06-15 Dennis J Solomon Beam optics and color modifier system
JP4313686B2 (ja) * 2004-01-29 2009-08-12 富士フイルム株式会社 輪帯光学素子用金型の製造方法
JP4658667B2 (ja) * 2005-04-19 2011-03-23 富士フイルム株式会社 輪帯光学素子の製造方法および輪帯光学素子用金型の製造方法
US8628321B2 (en) * 2010-10-13 2014-01-14 Microsoft Corporation Molding of nonuniform object having undercut structure
CN102230980B (zh) * 2011-06-24 2013-06-19 佘晓峰 高光效的聚光太阳能菲涅尔透镜制作方法
DE102011115756B4 (de) * 2011-09-30 2015-01-15 Auer Lighting Gmbh Scheinwerfer
US9201228B1 (en) 2013-02-27 2015-12-01 Focal Technologies, Inc. Light processing system
CN108254812A (zh) * 2017-12-13 2018-07-06 天水星火机床有限责任公司 一种菲涅尔透镜及其加工装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR902370A (fr) * 1943-03-03 1945-08-29 Zeiss Carl Procédé de fabrication d'une pièce optique ayant un effet analogue à celui de la lentille de fresnel
US2510344A (en) * 1945-03-17 1950-06-06 Rca Corp Viewing screen

Also Published As

Publication number Publication date
IT1137756B (it) 1986-09-10
US4456344A (en) 1984-06-26

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19940726