ES2129812T3 - Lente de fresnel doblemente surcada para una proyeccion elevada. - Google Patents

Lente de fresnel doblemente surcada para una proyeccion elevada.

Info

Publication number
ES2129812T3
ES2129812T3 ES95911701T ES95911701T ES2129812T3 ES 2129812 T3 ES2129812 T3 ES 2129812T3 ES 95911701 T ES95911701 T ES 95911701T ES 95911701 T ES95911701 T ES 95911701T ES 2129812 T3 ES2129812 T3 ES 2129812T3
Authority
ES
Spain
Prior art keywords
fresnel lens
high projection
lens double
double crossed
crossed
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 - Lifetime
Application number
ES95911701T
Other languages
English (en)
Inventor
Stephen K Eckhardt
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Application granted granted Critical
Publication of ES2129812T3 publication Critical patent/ES2129812T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
    • 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)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)

Abstract

UNA LENTE DE FRESNEL (10) SE OPTIMIZA PARA UN PROYECTOR ELEVADO MEDIANTE EL INCREMENTO DE SU EFICIENCIA DE TRANSMISION A TRAVES DE UN EQUILIBRADO DE LAS PERDIDAS DEBIDAS AL BLOQUEO DEL ELEVADOR Y A LA REFLEXION SUPERFICIAL E INTRODUCIENDO UNA ABERRACION DE COMA EN LA LENTE DE FRESNEL (10) QUE REDUZCA EL TAMAÑO DE LA IMAGEN PROYECTADA (37) DEL FILAMENTO DE LA FUENTE DE LUZ (30).
ES95911701T 1994-02-16 1995-02-16 Lente de fresnel doblemente surcada para una proyeccion elevada. Expired - Lifetime ES2129812T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19714994A 1994-02-16 1994-02-16

Publications (1)

Publication Number Publication Date
ES2129812T3 true ES2129812T3 (es) 1999-06-16

Family

ID=22728247

Family Applications (1)

Application Number Title Priority Date Filing Date
ES95911701T Expired - Lifetime ES2129812T3 (es) 1994-02-16 1995-02-16 Lente de fresnel doblemente surcada para una proyeccion elevada.

Country Status (8)

Country Link
US (1) US5803568A (es)
EP (1) EP0745228B1 (es)
JP (1) JPH09509263A (es)
KR (1) KR100342724B1 (es)
CN (1) CN1051157C (es)
DE (1) DE69509074T2 (es)
ES (1) ES2129812T3 (es)
WO (1) WO1995022772A1 (es)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3655972B2 (ja) * 1996-08-16 2005-06-02 大日本印刷株式会社 反射型スクリーン及び前方投影システム
JP5053531B2 (ja) * 2005-09-14 2012-10-17 スリーエム イノベイティブ プロパティズ カンパニー フレネルレンズ
US7684126B2 (en) * 2006-02-24 2010-03-23 3M Innovative Properties Company Fresnel field lens
DE102009001102A1 (de) * 2009-02-24 2010-08-26 Evonik Röhm Gmbh Verfahren und Bemessungsregel zur Dimensionierung und Herstellung von Fresnel-Linsen zur Licht-Fokussierung
JP2013033163A (ja) * 2011-08-03 2013-02-14 Tomy Co Ltd 投影装置
JP6370626B2 (ja) * 2014-07-24 2018-08-08 オリンパス株式会社 照明光学系、照明装置、及び照明光学素子
US10468566B2 (en) * 2017-04-10 2019-11-05 Ideal Industries Lighting Llc Hybrid lens for controlled light distribution

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE761741C (de) * 1940-01-11 1954-03-01 Klangfilm G M B H Stufenlinse mit Stufen auf beiden Seiten
US3334958A (en) * 1963-08-07 1967-08-08 Minnesota Mining & Mfg Nested fresnel-type lenses
DD107347A1 (es) * 1973-06-14 1974-07-20
FR2472197A1 (fr) * 1979-12-18 1981-06-26 Cintra Daniel Lentille de fresnel et son application a la television
US4741613A (en) * 1986-12-19 1988-05-03 Minnesota Mining And Manufacturing Company Reduced height transmissive overhead projector
US4900129A (en) * 1988-12-16 1990-02-13 Minnesota Mining And Manufacturing Company Dual grooved Fresnel lens for overhead projection
US5296882A (en) * 1992-12-21 1994-03-22 Minnesota Mining And Manufacturing Company Overhead projector with catadioptric fresnel lens
US5317349A (en) * 1993-06-29 1994-05-31 Minnesota Mining And Manufacturing Company Overhead projector with achromatic fresnel lens
US5504544A (en) * 1994-11-23 1996-04-02 Minnesota Mining And Manufacturing Company Projector with multiple lamp light source

Also Published As

Publication number Publication date
CN1051157C (zh) 2000-04-05
US5803568A (en) 1998-09-08
EP0745228A1 (en) 1996-12-04
KR100342724B1 (ko) 2002-12-05
WO1995022772A1 (en) 1995-08-24
CN1141080A (zh) 1997-01-22
JPH09509263A (ja) 1997-09-16
EP0745228B1 (en) 1999-04-14
DE69509074T2 (de) 1999-12-09
KR970701357A (ko) 1997-03-17
DE69509074D1 (de) 1999-05-20

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