DE69512214T2 - Kondensor für Schreibprojektoren - Google Patents
Kondensor für SchreibprojektorenInfo
- Publication number
- DE69512214T2 DE69512214T2 DE69512214T DE69512214T DE69512214T2 DE 69512214 T2 DE69512214 T2 DE 69512214T2 DE 69512214 T DE69512214 T DE 69512214T DE 69512214 T DE69512214 T DE 69512214T DE 69512214 T2 DE69512214 T2 DE 69512214T2
- Authority
- DE
- Germany
- Prior art keywords
- condenser
- projectors
- writing
- writing projectors
- 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 - Fee Related
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
-
- 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
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
- G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Projection Apparatus (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/197,613 US5515123A (en) | 1994-02-17 | 1994-02-17 | Condensers for illumination systems |
PCT/US1995/000431 WO1995022779A1 (en) | 1994-02-17 | 1995-01-12 | Condensers for illumination systems |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69512214D1 DE69512214D1 (de) | 1999-10-21 |
DE69512214T2 true DE69512214T2 (de) | 2000-05-11 |
Family
ID=22730077
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69512214T Expired - Fee Related DE69512214T2 (de) | 1994-02-17 | 1995-01-12 | Kondensor für Schreibprojektoren |
Country Status (9)
Country | Link |
---|---|
US (1) | US5515123A (de) |
EP (1) | EP0745231B1 (de) |
JP (1) | JPH09509262A (de) |
KR (1) | KR100319542B1 (de) |
CN (1) | CN1179225C (de) |
DE (1) | DE69512214T2 (de) |
ES (1) | ES2136276T3 (de) |
SI (1) | SI9520027A (de) |
WO (1) | WO1995022779A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5793159A (en) * | 1996-10-28 | 1998-08-11 | Welch Allyn, Inc. | Lensed end lamp with curved filament for uniform illumination |
US7538874B2 (en) * | 2006-03-23 | 2009-05-26 | Hach Company | Measurement of light from a predefined scatter angle from particulate matter in a media |
DE102009024894A1 (de) * | 2009-06-15 | 2010-12-16 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Projektionsdisplay und dessen Verwendung |
CN102650738A (zh) * | 2011-02-25 | 2012-08-29 | 中强光电股份有限公司 | 照明***及投射装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US934579A (en) * | 1909-04-01 | 1909-09-21 | Zeiss Carl Fa | Deformed collective lens. |
US1507212A (en) * | 1920-11-29 | 1924-09-02 | Eastman Kodak Co | Lens |
US1615674A (en) * | 1922-10-18 | 1927-01-25 | Gen Electric | Lens |
US1946088A (en) * | 1930-07-24 | 1934-02-06 | Rca Corp | Condensing lens system for motion picture projection |
US2587956A (en) * | 1948-05-28 | 1952-03-04 | Fish Schurman Corp | Light projecting apparatus |
US4327972A (en) * | 1979-10-22 | 1982-05-04 | Coulter Electronics, Inc. | Redirecting surface for desired intensity profile |
JPS59204815A (ja) * | 1983-05-09 | 1984-11-20 | Yamagata Daigaku | 照明用照度平均化レンズ |
US4741613A (en) * | 1986-12-19 | 1988-05-03 | Minnesota Mining And Manufacturing Company | Reduced height transmissive overhead projector |
DE3851485T2 (de) * | 1987-07-17 | 1995-01-19 | Dainippon Screen Mfg. Co., Ltd., Kyoto | Optisches System zur Erhöhung der Beleuchtungsstärke in Peripherobjektzonen. |
JPH07104499B2 (ja) * | 1987-07-31 | 1995-11-13 | 大日本スクリーン製造株式会社 | 照明用光学系 |
US5092672A (en) * | 1991-06-07 | 1992-03-03 | Minnesota Mining And Manufacturing Company | Condenser lens system for overhead projector |
US5400094A (en) * | 1993-03-31 | 1995-03-21 | Minnesota Mining And Manufacturing Company | Condensers for overhead projectors |
US5317349A (en) * | 1993-06-29 | 1994-05-31 | Minnesota Mining And Manufacturing Company | Overhead projector with achromatic fresnel lens |
-
1994
- 1994-02-17 US US08/197,613 patent/US5515123A/en not_active Expired - Lifetime
-
1995
- 1995-01-12 DE DE69512214T patent/DE69512214T2/de not_active Expired - Fee Related
- 1995-01-12 WO PCT/US1995/000431 patent/WO1995022779A1/en active IP Right Grant
- 1995-01-12 CN CNB951916394A patent/CN1179225C/zh not_active Expired - Fee Related
- 1995-01-12 JP JP7521792A patent/JPH09509262A/ja not_active Ceased
- 1995-01-12 EP EP95907406A patent/EP0745231B1/de not_active Expired - Lifetime
- 1995-01-12 KR KR1019960704429A patent/KR100319542B1/ko not_active IP Right Cessation
- 1995-01-12 ES ES95907406T patent/ES2136276T3/es not_active Expired - Lifetime
- 1995-01-12 SI SI9520027A patent/SI9520027A/sl unknown
Also Published As
Publication number | Publication date |
---|---|
CN1179225C (zh) | 2004-12-08 |
ES2136276T3 (es) | 1999-11-16 |
EP0745231B1 (de) | 1999-09-15 |
EP0745231A1 (de) | 1996-12-04 |
KR100319542B1 (ko) | 2002-04-22 |
KR970701362A (ko) | 1997-03-17 |
WO1995022779A1 (en) | 1995-08-24 |
SI9520027A (en) | 1996-12-31 |
JPH09509262A (ja) | 1997-09-16 |
US5515123A (en) | 1996-05-07 |
DE69512214D1 (de) | 1999-10-21 |
CN1141084A (zh) | 1997-01-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |