ES219944U - Una pantalla de proyeccion frontal. - Google Patents
Una pantalla de proyeccion frontal.Info
- Publication number
- ES219944U ES219944U ES0219944U ES219944U ES219944U ES 219944 U ES219944 U ES 219944U ES 0219944 U ES0219944 U ES 0219944U ES 219944 U ES219944 U ES 219944U ES 219944 U ES219944 U ES 219944U
- Authority
- ES
- Spain
- Prior art keywords
- sheet
- angle
- sides
- translation
- machine
- 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.)
- Granted
Links
Classifications
-
- 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
- G03B21/602—Lenticular screens
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Una pantalla de proyección frontal hecha con una hoja de material transmisor de la luz, teniendo dicha hoja una superficie frontal y una superficie posterior, y una pluralidad de crestas paralelas que están dispuestas sobre dicha superficie posterior, caracterizada por el hecho de que dicho material transmisor de luz tiene un ángulo crítico predeterminado de reflexión interna menor de 45°, teniendo cada una de dichas crestas costados curvados que terminan en une punta dichos costados curvados hacia afuera con respecto a dicha hoja a un ángulo igual o mayor que 45 grados en un punto inmediatamente adyacente a dicha hoja, mientras que el ángulo entre una línea tangente a dichos costados y el, plano definido por dicha hoja disminuye continuamente a medida que dichos costados curvados se aproximan a dicha punta, y el ángulo comprendido entre una línea tangente a dichos costados y dicha hoja es mayor o igual que dicho ángulo crítico predeterminado de reflexión interna en dichas puntas, pero menor de 45 grados.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31088272A | 1972-11-30 | 1972-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| ES219944U true ES219944U (es) | 1976-11-01 |
| ES219944Y ES219944Y (es) | 1977-03-01 |
Family
ID=23204494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES1973219944U Expired ES219944Y (es) | 1972-11-30 | 1973-11-29 | Una pantalla de proyeccion frontal. |
Country Status (26)
| Country | Link |
|---|---|
| US (1) | US3782805A (es) |
| JP (1) | JPS5342252B2 (es) |
| AR (1) | AR201491A1 (es) |
| AT (1) | AT340173B (es) |
| AU (1) | AU472576B2 (es) |
| BE (1) | BE807792A (es) |
| BR (1) | BR7309380D0 (es) |
| CA (1) | CA991896A (es) |
| CH (1) | CH561433A5 (es) |
| CS (1) | CS177157B2 (es) |
| DD (1) | DD108389A5 (es) |
| DE (1) | DE2358675C3 (es) |
| ES (1) | ES219944Y (es) |
| FR (1) | FR2209464A5 (es) |
| GB (1) | GB1402228A (es) |
| HU (1) | HU168801B (es) |
| IE (1) | IE38541B1 (es) |
| IL (1) | IL43716A (es) |
| IN (1) | IN138598B (es) |
| LU (1) | LU68875A1 (es) |
| NL (1) | NL166796C (es) |
| OA (1) | OA04573A (es) |
| PL (1) | PL94148B1 (es) |
| SE (1) | SE394527B (es) |
| SU (1) | SU670246A3 (es) |
| ZA (1) | ZA738878B (es) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3966301A (en) * | 1974-12-19 | 1976-06-29 | Qantix Corporation | Transparent screen having intermittent portions for reducing reflection from ambient light |
| US3938876A (en) * | 1974-12-19 | 1976-02-17 | Qantix Corporation | Front projection screen made from a transparent material |
| JPS5189419A (es) * | 1975-02-03 | 1976-08-05 | ||
| JPS5211033A (en) * | 1975-07-09 | 1977-01-27 | Kanteitsukusu Corp | Screen |
| US4012115A (en) * | 1975-07-10 | 1977-03-15 | Qantix Corporation | Sawtooth shaped front screen |
| AT368640B (de) * | 1976-09-13 | 1982-10-25 | Izon Corp | Mikrobildprojektor |
| US4497860A (en) * | 1978-12-18 | 1985-02-05 | Minnesota Mining And Manufacturing Company | Imageable prismatic array |
| US4206969A (en) * | 1979-04-11 | 1980-06-10 | Minnesota Mining And Manufacturing Company | Directional front projection screen |
| US4387959A (en) * | 1981-01-06 | 1983-06-14 | Zenith Radio Corporation | Rear projection screen |
| US5237449A (en) * | 1991-01-29 | 1993-08-17 | Nelson Optics Company, Inc. | Biased lenticular sign system |
| US6967053B1 (en) | 1999-01-21 | 2005-11-22 | Reflexite Corporation | Durable, open-faced retroreflective prismatic construction |
| US20050185279A1 (en) * | 1999-01-21 | 2005-08-25 | Reflexite Corporation | Durable, open-faced retroreflective prismatic construction |
| GB9926315D0 (en) * | 1999-11-05 | 2000-01-12 | Microgrin Limited | Diffusion or projection screen |
| JP2001221975A (ja) * | 2000-02-10 | 2001-08-17 | Fujitsu Ltd | 光学装置 |
| JP2006267222A (ja) * | 2005-03-22 | 2006-10-05 | Toshiba Corp | 投射型スクリーンおよび画像投影システム |
| WO2008109420A2 (en) * | 2007-03-02 | 2008-09-12 | Technology Solutions & Invention Llc | Two-sided corner-cube retroreflectors and methods of manufacturing the same |
| US7974005B2 (en) * | 2007-12-12 | 2011-07-05 | Texas Instruments Incorporated | Display screen for use in front projectors |
| US8568002B2 (en) * | 2010-03-05 | 2013-10-29 | Southpac Trust International Inc., Trustee of the LDH Trust | Light diffusion and condensing fixture |
| WO2017115166A1 (en) * | 2015-12-28 | 2017-07-06 | Kriezman Omri | Parking gate barrier rod projecting system |
| CN114488678B (zh) * | 2018-03-22 | 2023-06-30 | 深圳光峰科技股份有限公司 | 曲面屏幕及其微结构设置方法和投影系统 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US595273A (en) * | 1897-12-07 | soper | ||
| US2351034A (en) * | 1944-06-13 | Optical system composed of | ||
| US2180093A (en) * | 1936-03-10 | 1939-11-14 | Persons Majestic Mfg Company | Reflecting device |
| US2175067A (en) * | 1938-04-23 | 1939-10-03 | Holophane Co Inc | Prismatic reflector |
| US2551954A (en) * | 1947-02-21 | 1951-05-08 | John L Lehman | Lighting device having a lens which gives a long and relatively narrow area of illumination |
| US2991693A (en) * | 1956-07-23 | 1961-07-11 | American Optical Corp | Front projection screen |
-
1972
- 1972-11-30 US US00310882A patent/US3782805A/en not_active Expired - Lifetime
-
1973
- 1973-11-21 ZA ZA738878A patent/ZA738878B/xx unknown
- 1973-11-22 SE SE7315806A patent/SE394527B/xx unknown
- 1973-11-22 IE IE2124/73A patent/IE38541B1/xx unknown
- 1973-11-23 CH CH1653773A patent/CH561433A5/xx not_active IP Right Cessation
- 1973-11-23 AU AU62854/73A patent/AU472576B2/en not_active Expired
- 1973-11-24 DE DE2358675A patent/DE2358675C3/de not_active Expired
- 1973-11-26 AT AT987773A patent/AT340173B/de active
- 1973-11-26 BE BE138157A patent/BE807792A/xx unknown
- 1973-11-27 GB GB5493773A patent/GB1402228A/en not_active Expired
- 1973-11-27 AR AR251196A patent/AR201491A1/es active
- 1973-11-28 IL IL43716A patent/IL43716A/xx unknown
- 1973-11-28 LU LU68875A patent/LU68875A1/xx unknown
- 1973-11-28 IN IN2622/CAL/73A patent/IN138598B/en unknown
- 1973-11-28 CA CA186,877A patent/CA991896A/en not_active Expired
- 1973-11-29 BR BR9380/73A patent/BR7309380D0/pt unknown
- 1973-11-29 OA OA55073A patent/OA04573A/xx unknown
- 1973-11-29 JP JP13394573A patent/JPS5342252B2/ja not_active Expired
- 1973-11-29 ES ES1973219944U patent/ES219944Y/es not_active Expired
- 1973-11-29 SU SU731980089A patent/SU670246A3/ru active
- 1973-11-29 HU HUKA1395A patent/HU168801B/hu unknown
- 1973-11-29 DD DD174964A patent/DD108389A5/xx unknown
- 1973-11-30 NL NL7316470.A patent/NL166796C/xx not_active IP Right Cessation
- 1973-11-30 FR FR7342785A patent/FR2209464A5/fr not_active Expired
- 1973-11-30 CS CS8271A patent/CS177157B2/cs unknown
- 1973-11-30 PL PL1973166956A patent/PL94148B1/pl unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR7309380D0 (pt) | 1974-09-05 |
| LU68875A1 (es) | 1974-01-29 |
| AR201491A1 (es) | 1975-03-21 |
| BE807792A (fr) | 1974-03-15 |
| CA991896A (en) | 1976-06-29 |
| US3782805A (en) | 1974-01-01 |
| FR2209464A5 (es) | 1974-06-28 |
| AU472576B2 (en) | 1976-05-27 |
| ES219944Y (es) | 1977-03-01 |
| AT340173B (de) | 1977-11-25 |
| GB1402228A (en) | 1975-08-06 |
| JPS501726A (es) | 1975-01-09 |
| IL43716A (en) | 1975-12-31 |
| AU6285473A (en) | 1975-05-29 |
| ATA987773A (de) | 1977-03-15 |
| DE2358675C3 (de) | 1978-10-05 |
| CS177157B2 (es) | 1977-07-29 |
| NL7316470A (es) | 1974-06-04 |
| JPS5342252B2 (es) | 1978-11-10 |
| OA04573A (fr) | 1980-05-31 |
| HU168801B (es) | 1976-07-28 |
| IE38541B1 (en) | 1978-04-12 |
| DE2358675B2 (de) | 1978-01-19 |
| IL43716A0 (en) | 1974-03-14 |
| NL166796C (nl) | 1981-09-15 |
| ZA738878B (en) | 1974-10-30 |
| DE2358675A1 (de) | 1974-06-06 |
| DD108389A5 (es) | 1974-09-12 |
| PL94148B1 (es) | 1977-07-30 |
| NL166796B (nl) | 1981-04-15 |
| CH561433A5 (es) | 1975-04-30 |
| SE394527B (sv) | 1977-06-27 |
| IN138598B (es) | 1976-02-28 |
| SU670246A3 (ru) | 1979-06-25 |
| IE38541L (en) | 1974-05-30 |
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