KR900010427A - 오버헤드 포르젝터용 이중 홈형 프레이널 렌즈 - Google Patents

오버헤드 포르젝터용 이중 홈형 프레이널 렌즈 Download PDF

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Publication number
KR900010427A
KR900010427A KR1019890018618A KR890018618A KR900010427A KR 900010427 A KR900010427 A KR 900010427A KR 1019890018618 A KR1019890018618 A KR 1019890018618A KR 890018618 A KR890018618 A KR 890018618A KR 900010427 A KR900010427 A KR 900010427A
Authority
KR
South Korea
Prior art keywords
fresnel
lens
double grooved
frequency
circumferential surface
Prior art date
Application number
KR1019890018618A
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English (en)
Other versions
KR0145724B1 (ko
Inventor
프랑크 밴더워프 데니스
Original Assignee
도날드 밀러 셀
미네소타 마이닝 앤드 매뉴팩츄어링 컴패니
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.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=23094645&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=KR900010427(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 도날드 밀러 셀, 미네소타 마이닝 앤드 매뉴팩츄어링 컴패니 filed Critical 도날드 밀러 셀
Publication of KR900010427A publication Critical patent/KR900010427A/ko
Application granted granted Critical
Publication of KR0145724B1 publication Critical patent/KR0145724B1/ko

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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)
  • Overhead Projectors And Projection Screens (AREA)
  • Lenses (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Endoscopes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

내용 없음

Description

오버헤드 포르젝터용 이중 홈형 프레이널 렌즈
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명에 따른 이중 홈형 프레이널 렌즈의 단면도.

Claims (3)

  1. 단일의 렌즈 시이트재가 각 주면상에 홈형 프레이널 소자를 갖도록한 이중 홈형 프레이널 렌즈에 있어서, 모아레플린지를 감소시키기 위해 상기 렌즈의 일주면상에 있는 프레이널 소자의 홈빈도수가 상기 렌즈의 타주면상에 있는 프레이널 소자의 홈빈도수에 대해 최소한 4배이고, 상기 타주면상에 있는 상기 프레이널 소자의 홈빈도수에 대해 정수배가 되지 않도록 구성된 것을 특징으로 하는 이중 홈형 프레이널 렌즈.
  2. 제1항에 있어서, 상기 일주면상에 있는 상기 프레이널 소자의 상기 홈빈도수는 상기 타주면상에 있는 상기 프레이널 소자의 홈빈도수에 대해 약 4.74배인 것을 특징으로 하는 이중 홈형 프레이널 렌즈.
  3. 제1항에 있어서, 상기 렌즈의 각 주면상에 있는 프레이널 소자의 홈폭은 가변 가능한 것을 특징으로 하는 이중 홈형 프레이널 렌즈.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890018618A 1988-12-16 1989-12-15 오버헤드 프로젝터용 이중 홈형 프레이널 렌즈 KR0145724B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US285,531 1988-12-16
US07/285,531 US4900129A (en) 1988-12-16 1988-12-16 Dual grooved Fresnel lens for overhead projection
US285531 1988-12-16

Publications (2)

Publication Number Publication Date
KR900010427A true KR900010427A (ko) 1990-07-07
KR0145724B1 KR0145724B1 (ko) 1998-10-01

Family

ID=23094645

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890018618A KR0145724B1 (ko) 1988-12-16 1989-12-15 오버헤드 프로젝터용 이중 홈형 프레이널 렌즈

Country Status (11)

Country Link
US (1) US4900129A (ko)
EP (1) EP0375152B1 (ko)
JP (1) JPH02220001A (ko)
KR (1) KR0145724B1 (ko)
AU (1) AU617557B2 (ko)
CA (1) CA2003077C (ko)
DE (1) DE68921967T2 (ko)
ES (1) ES2070182T3 (ko)
HK (1) HK190596A (ko)
MY (1) MY104273A (ko)
YU (1) YU237989A (ko)

Families Citing this family (28)

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JPH02153328A (ja) * 1988-12-05 1990-06-13 Sumitomo Electric Ind Ltd 光源装置
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
EP0745228B1 (en) * 1994-02-16 1999-04-14 Minnesota Mining And Manufacturing Company Dual grooved fresnel lens for overhead projection
US5982543A (en) * 1994-03-17 1999-11-09 Bifocon Optics Forschungs-Und Entwicklungsgmbh Zoned lens
US6778326B1 (en) * 1995-03-29 2004-08-17 Eastman Kodak Company Combined heat filter and condenser lens, a projection type apparatus using such, and a method for fabricating it
EP1434080A3 (en) * 1998-04-22 2004-12-15 Teijin Chemicals, Ltd. Spectacle lens
US7009789B1 (en) * 2000-02-22 2006-03-07 Mems Optical, Inc. Optical device, system and method
EP1639398B9 (en) 2003-06-30 2012-02-22 Werner Fiala Intra-ocular lens or contact lens exhibiting large depth of focus
US7690814B2 (en) * 2005-03-10 2010-04-06 Honeywell International Inc. Luminaire with a one-sided diffuser
US10074683B2 (en) 2013-08-23 2018-09-11 Semiconductor Components Industries, Llc Imaging systems having lens substrates with total internal reflection mitigation structures
US10678412B2 (en) 2014-07-31 2020-06-09 Microsoft Technology Licensing, Llc Dynamic joint dividers for application windows
US10592080B2 (en) 2014-07-31 2020-03-17 Microsoft Technology Licensing, Llc Assisted presentation of application windows
US10254942B2 (en) 2014-07-31 2019-04-09 Microsoft Technology Licensing, Llc Adaptive sizing and positioning of application windows
US9513480B2 (en) 2015-02-09 2016-12-06 Microsoft Technology Licensing, Llc Waveguide
US9535253B2 (en) 2015-02-09 2017-01-03 Microsoft Technology Licensing, Llc Display system
US10018844B2 (en) 2015-02-09 2018-07-10 Microsoft Technology Licensing, Llc Wearable image display system
US9827209B2 (en) 2015-02-09 2017-11-28 Microsoft Technology Licensing, Llc Display system
US11086216B2 (en) 2015-02-09 2021-08-10 Microsoft Technology Licensing, Llc Generating electronic components
US9423360B1 (en) 2015-02-09 2016-08-23 Microsoft Technology Licensing, Llc Optical components
US10317677B2 (en) 2015-02-09 2019-06-11 Microsoft Technology Licensing, Llc Display system
US9429692B1 (en) 2015-02-09 2016-08-30 Microsoft Technology Licensing, Llc Optical components
US10215890B2 (en) 2016-05-18 2019-02-26 Google Llc Optical field curvature control using multi-layer Fresnel lens in VR display
DE102016109647B4 (de) 2016-05-25 2022-08-25 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung Linse und Leuchte mit einer solchen Linse
CN106772718B (zh) * 2017-01-16 2018-11-02 广州弥德科技有限公司 菲涅尔透镜及具有该菲涅尔透镜的显示装置
US20200192075A1 (en) * 2018-12-18 2020-06-18 Leupold & Stevens, Inc. Illuminated reticle system with fresnel lens
DE102020006276A1 (de) 2020-10-13 2022-04-14 Helge Moritz Regenbogen-Fresnel-Prisma Dispersives, flaches Element zur Erzeugung eines künstlichen und gebogenen Regenbogens
JP2023139896A (ja) * 2022-03-22 2023-10-04 ソニーグループ株式会社 レンズ系及び画像表示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972593A (en) * 1974-07-01 1976-08-03 Minnesota Mining And Manufacturing Company Louvered echelon lens
US4044889A (en) * 1976-09-13 1977-08-30 Seymour Orentreich Cosmetic container including integrated lens structure
JPS57109618A (en) * 1980-12-27 1982-07-08 Dainippon Printing Co Ltd Both faces fresnel lens and its manufacture
JPS5995525A (ja) * 1982-11-24 1984-06-01 Mitsubishi Rayon Co Ltd 背面投影スクリ−ン

Also Published As

Publication number Publication date
EP0375152A3 (en) 1991-08-28
CA2003077C (en) 1997-09-30
KR0145724B1 (ko) 1998-10-01
AU617557B2 (en) 1991-11-28
AU4537789A (en) 1990-06-21
HK190596A (en) 1996-10-25
US4900129A (en) 1990-02-13
YU237989A (sh) 1992-07-20
EP0375152A2 (en) 1990-06-27
EP0375152B1 (en) 1995-03-29
CA2003077A1 (en) 1990-06-16
JPH02220001A (ja) 1990-09-03
DE68921967T2 (de) 1995-11-09
DE68921967D1 (de) 1995-05-04
MY104273A (en) 1994-02-28
ES2070182T3 (es) 1995-06-01

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