KR940010750A - 배면반사방식 텔레비전용 투사렌즈시스템 - Google Patents
배면반사방식 텔레비전용 투사렌즈시스템 Download PDFInfo
- Publication number
- KR940010750A KR940010750A KR1019920019859A KR920019859A KR940010750A KR 940010750 A KR940010750 A KR 940010750A KR 1019920019859 A KR1019920019859 A KR 1019920019859A KR 920019859 A KR920019859 A KR 920019859A KR 940010750 A KR940010750 A KR 940010750A
- Authority
- KR
- South Korea
- Prior art keywords
- lens
- optical power
- lens system
- projection lens
- aspherical
- Prior art date
Links
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 (6)
- 음극선관의 형광면에 결상된 화상을 배면의 반사거울로 확대투사하기 위한 배면반사방식TV용 투사렌즈시스템에 있어서, 상기 반사거울쪽으로부터 상기 음극선관을 향해 광축을 따라 순차적으로 위치하는 광축영역은 옵티컬파워가 거의 없고 주변으로 갈수록 약한 양의 옵티컬파워를 갖는 제1렌즈; 강한 양의 옵티컬파워를 가지며 적어도 한면이 비구면인 양면볼록형상의 제2렌즈; 강한 음의 옵티컬파워를 가지며 적어도 한면이 비구면인 양면 오목형상의 제3렌즈; 강한 양의 옵티컬파워를 가지며 적어도 한면이 비구면인 양면볼록형상의 제4렌즈; 및 약한 음의 옵티컬파워를 가지며 적어도 한면이 비구면인 C자 형상의 제5렌즈를 포함하는 것을 특징으로 하는 배면반사방식TV용 투사렌즈시스템.
- 제1항에 있어서, 상기 음극선관의 형광면과 상기 제5렌즈사이에는 제5렌즈와 거의 동일한 굴절율을 갖는 냉각용 냉매가 위치하는 것을 특징으로 하는 배면반사방식TV용 투사렌즈시스템.
- 제1항에 있어서, 상기 렌즈시스템이 갖는 총 옵티컬파워에 대한 제2도는 제4렌즈의 옵티컬파워비는 1.0보다 크고 1.3보다 작으며, 상기 총 옵티컬파워에 대한 상기 제3렌즈의 옵티컬파워비의 절대값은 0.9보다 크고 1.4보다 작은 것을 특징으로 하는 배면반사방식TV용 투사렌즈시스템.
- 제1항에 있어서, 상기 제3렌즈에 대한 상기 제2렌즈의 굴절율 및 분사값의 절대값은 각각0.13 및 25.0보다 큰 것을 특징으로 하는 배면반사방식TV용 투사렌즈시스템.
- 제1항에 있어서, 상기 제4렌즈는 50.0보다 작은 분산값을 갖는 것을 특징으로 하는 배면반사방식TV용 투사렌즈시스템.
- 제1항에 있어서, 상기 제4렌즈와 제5렌즈사이의 거리 및 제1렌즈와 제2렌즈사이의 거리는 조절가능한 것을 특징으로 하는 배면반사방식TV용 투사렌즈시스템.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
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 true KR940010750A (ko) | 1994-05-26 |
KR0138743B1 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 |
---|---|
US5452132A (en) | 1995-09-19 |
KR0138743B1 (ko) | 1998-05-15 |
JPH06208054A (ja) | 1994-07-26 |
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