KR940011595B1 - 투영 스크린용 프레스넬 렌즈 및 이를 구비하는 칼라 투영 tv시스템 - Google Patents
투영 스크린용 프레스넬 렌즈 및 이를 구비하는 칼라 투영 tv시스템 Download PDFInfo
- Publication number
- KR940011595B1 KR940011595B1 KR1019860009767A KR860009767A KR940011595B1 KR 940011595 B1 KR940011595 B1 KR 940011595B1 KR 1019860009767 A KR1019860009767 A KR 1019860009767A KR 860009767 A KR860009767 A KR 860009767A KR 940011595 B1 KR940011595 B1 KR 940011595B1
- Authority
- KR
- South Korea
- Prior art keywords
- angle
- lens
- fresnel lens
- projection
- cutting
- Prior art date
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- 230000000630 rising effect Effects 0.000 claims description 16
- 230000001174 ascending effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims 1
- 210000001747 pupil Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000013515 script Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/72—Modifying the appearance of television pictures by optical filters or diffusing screens
-
- 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
- G03B21/54—Accessories
- G03B21/56—Projection screens
- G03B21/60—Projection screens characterised by the nature of the surface
- G03B21/62—Translucent screens
- G03B21/625—Lenticular translucent screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Transforming Electric Information Into Light Information (AREA)
- Lenses (AREA)
Abstract
Description
Claims (6)
- 빛이 적어도 하나의 투명 렌즈로부터 투영 스크린상에 투영되는 투영 시스템에서 사용된 투영 스크린용 프레스넬 렌즈가 프레스넬 렌즈의 표면상에 절자 표면 및 상승 표면에 의해 각각 구성된 다수의 절자면을 가지며, 절자 표면이 상기 하나의 표면과 함께 절자면 각을 형성하고, 상승 표면이 상기 하나의 표면에 수직으로 상승각을 형성하며, 절자면 각이 프레스넬 렌즈의 중심으로 부터 상기 렌즈의 바깥족 엣지로 증가하는 투영 스크린용 프레스넬 렌즈에 있어서, 효율 및 해상을 증가하기 위하여, 상승각이 프레스넬 렌즈의 중심으로 부터 바깥쪽 엣지로 변하는 것을 특징으로 하는 투명 스크린용 프레스넬 렌즈.
- 여러개인 투영 시스템에서 사용된 투영 스크린용 프레스넬 렌즈에 있어서, 상기 프레스넬 렌즈가 상기 렌즈의 중심으로부터 상기 절자면의 방사상 거리의 함수에 따라 변하는 상승각을 갖는 절자면을 포함하며, 상기 함수가 거의 선형인 것을 특징으로 하는 투영 스크린용 프레스넬 렌즈.
- 제 1 항 또는 2항에 있어서, 상기 프레스넬 렌즈의 절자면이 상기 스크린의 시청면과 면해 있는 것을 특징으로 하는 투영 스크린용 프레스넬 렌즈.
- 제 1 항,2항 또는 3항에 있어서, 상기 상승각이 최소치를 가지며, 산정된 최적 각이 상기 최소치를 초과하는 상기 렌즈의 중심으로부터 떨어져 있는 절자면에서만 변하는 것을 특징으로 하는 투명 스크린용 프레스넬 렌즈.
- 제 1 항,2항,3항 또는 4항에 있어서, 각 절자면에서 최적 상승각이 절자면의 제 1 엣지를 통한 최상 광선의 굴절각 및 동일한 절자면의 제 2 엣지를 통한 최하부 광선의 굴절각의 평균인 것을 특징으로 하는 투영 스크린용 프레스넬 렌즈.
- 1차 칼라를 위한 세개의 영상원, 세개의 투영 렌즈 및 하나의 투영 스크린을 갖는 칼라 투영 TV시스템에 있어서, 투영 스크린이 제 1 항,2항,3항,4항 또는 5항중 어느 한 항에서 청구된 바와같은 프레스넬 렌즈를 구비하는 것을 특징으로 하는 투영 스크린용 TV 시스템.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL800012 | 1985-11-20 | ||
US06/800,012 US4824227A (en) | 1985-11-20 | 1985-11-20 | Optimum riser angle for fresnel lenses in projection screens |
Publications (2)
Publication Number | Publication Date |
---|---|
KR870005550A KR870005550A (ko) | 1987-06-09 |
KR940011595B1 true KR940011595B1 (ko) | 1994-12-22 |
Family
ID=25177299
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019860009767A KR940011595B1 (ko) | 1985-11-20 | 1986-11-19 | 투영 스크린용 프레스넬 렌즈 및 이를 구비하는 칼라 투영 tv시스템 |
Country Status (8)
Country | Link |
---|---|
US (1) | US4824227A (ko) |
EP (1) | EP0223310B1 (ko) |
JP (1) | JPH07121131B2 (ko) |
KR (1) | KR940011595B1 (ko) |
CA (1) | CA1268065A (ko) |
DE (1) | DE3669056D1 (ko) |
DK (1) | DK174671B1 (ko) |
SG (1) | SG85990G (ko) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0320887B1 (en) * | 1987-12-14 | 1993-08-11 | Ichikoh Industries Limited | Method for forming fresnel-type prism lens |
JP2686536B2 (ja) * | 1988-05-20 | 1997-12-08 | パイオニア株式会社 | ファイバー型光波長変換装置 |
KR950015238A (ko) * | 1993-11-05 | 1995-06-16 | 배순훈 | 포커스 에러 검출장치 |
JPH10282310A (ja) * | 1997-04-11 | 1998-10-23 | Dainippon Printing Co Ltd | フレネルレンズシート及び透過型スクリーン |
US6807020B2 (en) | 2002-08-01 | 2004-10-19 | Jenmar Visual Systems | Lens optimization and color correction for image projection systems |
US6700713B2 (en) * | 2002-08-01 | 2004-03-02 | Jenmar Visual Systems | Lens optimization for image projection systems |
US6867928B2 (en) * | 2002-08-01 | 2005-03-15 | Jenmar Visual Systems | Method and apparatus for correcting visual aberrations in image projection systems |
FR2855273A1 (fr) * | 2003-05-20 | 2004-11-26 | Thomson Licensing Sa | Lentille de fresnel a eclairer sous incidence elevee |
US20050041307A1 (en) * | 2003-07-22 | 2005-02-24 | Stephen Barone | Directed Fresnel lenses |
JP4967247B2 (ja) * | 2004-11-01 | 2012-07-04 | 株式会社日立製作所 | 画像表示装置及びそれに用いるスクリーン |
US7740354B2 (en) | 2006-10-25 | 2010-06-22 | Volk Donald A | Multi-layered gradient index progressive lens |
US7735998B2 (en) | 2006-10-25 | 2010-06-15 | Volk Donald A | Multi-layered multifocal lens with blended refractive index |
FR2995408B1 (fr) * | 2012-09-10 | 2016-11-18 | Soitec Solar Gmbh | Lentille de fresnel avec angle de depouille variable |
EP4239378A1 (en) * | 2016-09-13 | 2023-09-06 | Facebook Technologies, LLC | Fresnel lens with dynamic draft for reduced optical artifacts |
CN110161597B (zh) | 2018-02-12 | 2021-11-16 | 玉晶光电(厦门)有限公司 | 菲涅耳透镜 |
TWI651549B (zh) * | 2018-02-12 | 2019-02-21 | 玉晶光電股份有限公司 | 菲涅耳透鏡 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2200646A (en) * | 1938-02-28 | 1940-05-14 | John D Strong | Transparent projection screen |
DE2519617A1 (de) * | 1975-05-02 | 1976-11-11 | Agfa Gevaert Ag | Projektionsschirm |
US4457594A (en) * | 1980-09-08 | 1984-07-03 | B Optical | Fresnel lens projection system with high gain screen |
US4391495A (en) * | 1981-06-02 | 1983-07-05 | The Austin Company | Image display system |
US4398810A (en) * | 1982-02-18 | 1983-08-16 | B Optical | Fresnel lens system |
JPS59140434A (ja) * | 1982-10-08 | 1984-08-11 | Mitsubishi Rayon Co Ltd | 背面投影スクリ−ン |
-
1985
- 1985-11-20 US US06/800,012 patent/US4824227A/en not_active Expired - Lifetime
-
1986
- 1986-11-13 CA CA000522907A patent/CA1268065A/en not_active Expired - Lifetime
- 1986-11-17 DE DE8686202025T patent/DE3669056D1/de not_active Expired - Lifetime
- 1986-11-17 EP EP86202025A patent/EP0223310B1/en not_active Expired - Lifetime
- 1986-11-17 DK DK198605479A patent/DK174671B1/da not_active IP Right Cessation
- 1986-11-18 JP JP61273055A patent/JPH07121131B2/ja not_active Expired - Lifetime
- 1986-11-19 KR KR1019860009767A patent/KR940011595B1/ko not_active IP Right Cessation
-
1990
- 1990-10-24 SG SG859/90A patent/SG85990G/en unknown
Also Published As
Publication number | Publication date |
---|---|
SG85990G (en) | 1991-01-04 |
JPH07121131B2 (ja) | 1995-12-20 |
EP0223310A2 (en) | 1987-05-27 |
KR870005550A (ko) | 1987-06-09 |
EP0223310B1 (en) | 1990-02-14 |
DK174671B1 (da) | 2003-08-25 |
EP0223310A3 (en) | 1987-10-28 |
DK547986D0 (da) | 1986-11-17 |
DE3669056D1 (de) | 1990-03-22 |
JPS62175087A (ja) | 1987-07-31 |
CA1268065A (en) | 1990-04-24 |
US4824227A (en) | 1989-04-25 |
DK547986A (da) | 1987-05-21 |
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