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 stessaInfo
- 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
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)
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)
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)
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 |
-
1981
- 1981-07-23 IT IT23098/81A patent/IT1137756B/it active
- 1981-09-29 US US06/307,127 patent/US4456344A/en not_active Expired - Fee Related
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 |