KR0138743B1 - 배면투사방식 텔레비젼용 투사렌즈시스템 - Google Patents
배면투사방식 텔레비젼용 투사렌즈시스템Info
- Publication number
- KR0138743B1 KR0138743B1 KR1019920019859A KR920019859A KR0138743B1 KR 0138743 B1 KR0138743 B1 KR 0138743B1 KR 1019920019859 A KR1019920019859 A KR 1019920019859A KR 920019859 A KR920019859 A KR 920019859A KR 0138743 B1 KR0138743 B1 KR 0138743B1
- Authority
- KR
- South Korea
- Prior art keywords
- lens
- projection
- optical power
- lens system
- aspherical
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 230000005499 meniscus Effects 0.000 claims abstract description 4
- 239000006185 dispersion Substances 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000003507 refrigerant Substances 0.000 claims description 3
- 230000004075 alteration Effects 0.000 abstract description 18
- 239000011521 glass Substances 0.000 description 5
- 206010010071 Coma Diseases 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 201000009310 astigmatism Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
- H04N5/7408—Direct viewing projectors, e.g. an image displayed on a video CRT or LCD display being projected on a screen
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
- G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/60—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having five components only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
- G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components only
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Lenses (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
Description
Claims (9)
- CRT스크린에 직각인 광축을 따라 순차적으로 배열된 다수의 렌즈를 갖는 배면투사방식TV용 투사렌즈시스템에 있어서,적어도 한 면이 비구면이고, 중심부는 거의 옵티컬파워가 없고, 주변부는 약한 양의 옵티컬파워를 갖는 제 1렌즈;강한 양의 옵티컬파워를 가지며, 적어도 한면이 비구면이고, 양면볼록(bi-convex)형상인 제 2렌즈;강한 음의 옴지컬파워를 가지며, 적어도 한면이 비구면이고, 양면오목(bi-concave)형상인 제 3렌즈;강한 양의 옵티컬파워를 가지며, 적어도 한면이 비구면이고, 양면볼록 형상인 제 4렌즈; 및약한 음의 옵티컬파워를 가지며, 적어도 한면이 비구면이고, 초승달(meniscus) 형상인 제 5렌즈를 포함하는 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 1렌즈 내지 제 5렌즈의 중심으로 상기 광축이 통과하는 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 5렌즈와 CRT의 형광면사이에, 제 5렌즈와 거의 동일한 굴절률을 갖는 냉매가 채워진 냉각수단을 추가로 포함하는 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 3렌즈의 옵티컬파워는 상기 투사렌즈시스템의 전체 옵티컬파워의 대부분을 차지하는 것을 특징으로 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 전체 옵티컬파워(KO)에 대한 상기 제 3렌즈(L3)의 옵티컬파워(K3)비의 절대값(|K3/K0|)은 0.9보다 크고 1.4보다 작은 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 2렌즈의 굴절률(N2)과 제 3렌즈의 굴절률(N3)간의 차이 절대값은 0.13 보다 큰 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 2렌즈의 분산값(V2)과 제 3렌즈의 분산값(V3)간의 차이 절대값은 25.0 보다 큰 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 4렌즈의 분산값(V4)은 50.0 보다 큰 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
- 제 1항에 있어서, 상기 제 4렌즈와 제 5렌즈간의 거리 및 제 1렌즈와 제 2렌즈간의 거리는 상관으로 가변되는 것을 특징으로 하는 배면투사방식TV용 투사렌즈시스템.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920019859A KR0138743B1 (ko) | 1992-10-28 | 1992-10-28 | 배면투사방식 텔레비젼용 투사렌즈시스템 |
JP5219647A JPH06208054A (ja) | 1992-10-28 | 1993-09-03 | 背面投射方式tv用投射レンズシステム |
US08/141,939 US5452132A (en) | 1992-10-28 | 1993-10-28 | Projection lens system for rear type projection television |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019920019859A KR0138743B1 (ko) | 1992-10-28 | 1992-10-28 | 배면투사방식 텔레비젼용 투사렌즈시스템 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR940010750A KR940010750A (ko) | 1994-05-26 |
KR0138743B1 true KR0138743B1 (ko) | 1998-05-15 |
Family
ID=19341863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019920019859A KR0138743B1 (ko) | 1992-10-28 | 1992-10-28 | 배면투사방식 텔레비젼용 투사렌즈시스템 |
Country Status (3)
Country | Link |
---|---|
US (1) | US5452132A (ko) |
JP (1) | JPH06208054A (ko) |
KR (1) | KR0138743B1 (ko) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5946142A (en) | 1995-12-11 | 1999-08-31 | Hitachi Ltd. | Projection lens system and projection image display apparatus using the same |
JPH10133102A (ja) * | 1996-10-30 | 1998-05-22 | Fuji Photo Optical Co Ltd | 色補正と温度補償のなされたレンズ |
JP3551058B2 (ja) * | 1999-01-21 | 2004-08-04 | 株式会社日立製作所 | 投写型画像ディスプレイ装置 |
JP2003295243A (ja) * | 2002-04-04 | 2003-10-15 | Canon Inc | 高調波光源装置、その駆動方法、およびそれを用いた画像表示装置、画像形成装置、光記録装置 |
CN102854611B (zh) * | 2011-06-29 | 2015-05-20 | 亚洲光学股份有限公司 | 微小型成像镜头 |
CN105223674A (zh) * | 2014-06-25 | 2016-01-06 | Kolen株式会社 | 成像镜头系统 |
CN104407431B (zh) * | 2014-12-05 | 2017-11-17 | 宁波舜宇车载光学技术有限公司 | 一种光学镜头 |
CN105652414B (zh) * | 2016-03-28 | 2018-04-17 | 中山依瓦塔光学有限公司 | 一种鱼眼镜头消紫边光学系统及其应用的镜头 |
TWI721211B (zh) * | 2017-09-08 | 2021-03-11 | 揚明光學股份有限公司 | 鏡頭及包含其之投影裝置 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4815831A (en) * | 1985-07-11 | 1989-03-28 | U.S. Precision Lens, Incorporated | Projection lens with color correction |
JPS62148914A (ja) * | 1985-12-23 | 1987-07-02 | Canon Inc | ビデオプロジエクタ−レンズ |
JPH0750245B2 (ja) * | 1987-03-31 | 1995-05-31 | 松下電器産業株式会社 | 投影レンズ |
JP2859405B2 (ja) * | 1990-09-13 | 1999-02-17 | 株式会社日立製作所 | 投写用レンズ装置及びそれを用いたプロジェクションテレビジョン装置 |
US4963007A (en) * | 1989-09-05 | 1990-10-16 | U.S. Precision Lens, Inc. | Color corrected projection lens |
-
1992
- 1992-10-28 KR KR1019920019859A patent/KR0138743B1/ko not_active IP Right Cessation
-
1993
- 1993-09-03 JP JP5219647A patent/JPH06208054A/ja active Pending
- 1993-10-28 US US08/141,939 patent/US5452132A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH06208054A (ja) | 1994-07-26 |
KR940010750A (ko) | 1994-05-26 |
US5452132A (en) | 1995-09-19 |
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Legal Events
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