IT1137756B - Lente di fresnel prefezionata e procedimento e stampo per l'ottenimento della stessa - Google Patents

Lente di fresnel prefezionata e procedimento e stampo per l'ottenimento della stessa

Info

Publication number
IT1137756B
IT1137756B IT23098/81A IT2309881A IT1137756B IT 1137756 B IT1137756 B IT 1137756B IT 23098/81 A IT23098/81 A IT 23098/81A IT 2309881 A IT2309881 A IT 2309881A IT 1137756 B IT1137756 B IT 1137756B
Authority
IT
Italy
Prior art keywords
prefected
mold
obtaining
same
fresnel lens
Prior art date
Application number
IT23098/81A
Other languages
English (en)
Other versions
IT8123098A0 (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 IT8123098A0 (it) 1981-07-23
IT1137756B true 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
US6084670A (en) * 1997-03-11 2000-07-04 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
US4456344A (en) 1984-06-26
IT8123098A0 (it) 1981-07-23

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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