FR2693561B1 - Polarized light source and overhead projector using this source. - Google Patents
Polarized light source and overhead projector using this source.Info
- Publication number
- FR2693561B1 FR2693561B1 FR9209007A FR9209007A FR2693561B1 FR 2693561 B1 FR2693561 B1 FR 2693561B1 FR 9209007 A FR9209007 A FR 9209007A FR 9209007 A FR9209007 A FR 9209007A FR 2693561 B1 FR2693561 B1 FR 2693561B1
- Authority
- FR
- France
- Prior art keywords
- source
- polarized light
- overhead projector
- light source
- projector
- 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
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3066—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state involving the reflection of light at a particular angle of incidence, e.g. Brewster's angle
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3167—Modulator illumination systems for polarizing the light beam
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Polarising Elements (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9209007A FR2693561B1 (en) | 1992-07-10 | 1992-07-10 | Polarized light source and overhead projector using this source. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9209007A FR2693561B1 (en) | 1992-07-10 | 1992-07-10 | Polarized light source and overhead projector using this source. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2693561A1 FR2693561A1 (en) | 1994-01-14 |
FR2693561B1 true FR2693561B1 (en) | 1994-09-30 |
Family
ID=9432112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9209007A Expired - Fee Related FR2693561B1 (en) | 1992-07-10 | 1992-07-10 | Polarized light source and overhead projector using this source. |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2693561B1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0950000A (en) * | 1995-06-02 | 1997-02-18 | Matsushita Electric Ind Co Ltd | Polarizing direction converting illumination device and projection type picture display device |
DE19545821A1 (en) * | 1995-12-08 | 1997-06-12 | Friedrich Dipl Ing Luellau | Device for exposing printing plates |
FR2754355B1 (en) * | 1996-10-08 | 1998-12-04 | Corning Inc | CONVERTER OF NATURAL WHITE LIGHT TO PLANE POLARIZED LIGHT |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH061303B2 (en) * | 1984-11-20 | 1994-01-05 | ソニー株式会社 | Polarized illumination device |
FR2670024B1 (en) * | 1990-11-30 | 1994-03-18 | Scanera Sc | POLARIZED LIGHT PRODUCTION DEVICE. |
US5387953A (en) * | 1990-12-27 | 1995-02-07 | Canon Kabushiki Kaisha | Polarization illumination device and projector having the same |
-
1992
- 1992-07-10 FR FR9209007A patent/FR2693561B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2693561A1 (en) | 1994-01-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |