HK190596A - Double-sided grooved fresnel lens for overhead projector - Google Patents
Double-sided grooved fresnel lens for overhead projectorInfo
- Publication number
- HK190596A HK190596A HK190596A HK190596A HK190596A HK 190596 A HK190596 A HK 190596A HK 190596 A HK190596 A HK 190596A HK 190596 A HK190596 A HK 190596A HK 190596 A HK190596 A HK 190596A
- Authority
- HK
- Hong Kong
- Prior art keywords
- double
- fresnel lens
- overhead projector
- sided grooved
- grooved fresnel
- Prior art date
Links
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)
- Optical Elements Other Than Lenses (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Endoscopes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/285,531 US4900129A (en) | 1988-12-16 | 1988-12-16 | Dual grooved Fresnel lens for overhead projection |
Publications (1)
Publication Number | Publication Date |
---|---|
HK190596A true HK190596A (en) | 1996-10-25 |
Family
ID=23094645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
HK190596A HK190596A (en) | 1988-12-16 | 1996-10-17 | Double-sided grooved fresnel lens for overhead projector |
Country Status (11)
Country | Link |
---|---|
US (1) | US4900129A (xx) |
EP (1) | EP0375152B1 (xx) |
JP (1) | JPH02220001A (xx) |
KR (1) | KR0145724B1 (xx) |
AU (1) | AU617557B2 (xx) |
CA (1) | CA2003077C (xx) |
DE (1) | DE68921967T2 (xx) |
ES (1) | ES2070182T3 (xx) |
HK (1) | HK190596A (xx) |
MY (1) | MY104273A (xx) |
YU (1) | YU237989A (xx) |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
US5803568A (en) * | 1994-02-16 | 1998-09-08 | Minnesota Mining And Manufacturing Company | Dual grooved Fresnel lens for overhead projection |
WO1995025288A1 (de) * | 1994-03-17 | 1995-09-21 | Bifocon Optics Forschungs- Und Entwicklungsgmbh | Zonenlinse |
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 |
ES2238829T3 (es) * | 1998-04-22 | 2005-09-01 | Teijin Chemicals, Ltd. | Procedimiento de moldeo por inyeccion-compresion destinado a un producto opticamente formado. |
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 |
US10592080B2 (en) | 2014-07-31 | 2020-03-17 | Microsoft Technology Licensing, Llc | Assisted presentation of application windows |
US10678412B2 (en) | 2014-07-31 | 2020-06-09 | Microsoft Technology Licensing, Llc | Dynamic joint dividers for application windows |
US10254942B2 (en) | 2014-07-31 | 2019-04-09 | Microsoft Technology Licensing, Llc | Adaptive sizing and positioning of application windows |
US11086216B2 (en) | 2015-02-09 | 2021-08-10 | Microsoft Technology Licensing, Llc | Generating electronic components |
US9513480B2 (en) | 2015-02-09 | 2016-12-06 | Microsoft Technology Licensing, Llc | Waveguide |
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 |
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 |
US9535253B2 (en) | 2015-02-09 | 2017-01-03 | Microsoft Technology Licensing, Llc | Display system |
US9423360B1 (en) | 2015-02-09 | 2016-08-23 | 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 |
JP7414826B2 (ja) * | 2018-12-18 | 2024-01-16 | ルポルド アンド スティーブンズ インコーポレイテッド | フレネルレンズを有する照光式レチクルシステム |
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)
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 |
-
1988
- 1988-12-16 US US07/285,531 patent/US4900129A/en not_active Expired - Lifetime
-
1989
- 1989-11-16 EP EP89311880A patent/EP0375152B1/en not_active Expired - Lifetime
- 1989-11-16 DE DE68921967T patent/DE68921967T2/de not_active Expired - Fee Related
- 1989-11-16 CA CA002003077A patent/CA2003077C/en not_active Expired - Fee Related
- 1989-11-16 ES ES89311880T patent/ES2070182T3/es not_active Expired - Lifetime
- 1989-11-21 AU AU45377/89A patent/AU617557B2/en not_active Ceased
- 1989-11-22 MY MYPI89001624A patent/MY104273A/en unknown
- 1989-12-15 YU YU237989A patent/YU237989A/sh unknown
- 1989-12-15 KR KR1019890018618A patent/KR0145724B1/ko not_active IP Right Cessation
- 1989-12-15 JP JP89324189A patent/JPH02220001A/ja active Pending
-
1996
- 1996-10-17 HK HK190596A patent/HK190596A/xx not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
YU237989A (sh) | 1992-07-20 |
MY104273A (en) | 1994-02-28 |
EP0375152A2 (en) | 1990-06-27 |
CA2003077A1 (en) | 1990-06-16 |
EP0375152B1 (en) | 1995-03-29 |
ES2070182T3 (es) | 1995-06-01 |
JPH02220001A (ja) | 1990-09-03 |
AU4537789A (en) | 1990-06-21 |
DE68921967T2 (de) | 1995-11-09 |
EP0375152A3 (en) | 1991-08-28 |
DE68921967D1 (de) | 1995-05-04 |
US4900129A (en) | 1990-02-13 |
KR0145724B1 (ko) | 1998-10-01 |
KR900010427A (ko) | 1990-07-07 |
CA2003077C (en) | 1997-09-30 |
AU617557B2 (en) | 1991-11-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |
Effective date: 20031116 |
|
PC | Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee) |