WO1998007279A1 - Dispositif d'affichage de projection extremement efficace possedant des diviseurs de faisceau de polarisation a couche mince - Google Patents
Dispositif d'affichage de projection extremement efficace possedant des diviseurs de faisceau de polarisation a couche mince Download PDFInfo
- Publication number
- WO1998007279A1 WO1998007279A1 PCT/CA1997/000567 CA9700567W WO9807279A1 WO 1998007279 A1 WO1998007279 A1 WO 1998007279A1 CA 9700567 W CA9700567 W CA 9700567W WO 9807279 A1 WO9807279 A1 WO 9807279A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- thin film
- polarized
- display system
- projection display
- Prior art date
Links
- 239000010409 thin film Substances 0.000 title claims abstract description 207
- 239000000758 substrate Substances 0.000 claims abstract description 38
- 238000003384 imaging method Methods 0.000 claims description 101
- 230000003287 optical effect Effects 0.000 claims description 58
- 230000010287 polarization Effects 0.000 claims description 52
- 239000004973 liquid crystal related substance Substances 0.000 claims description 15
- 239000003086 colorant Substances 0.000 claims description 12
- 239000011521 glass Substances 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 8
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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
-
- 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]
- H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
- H04N9/3105—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators
-
- 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
Definitions
- Pile-of-plates polarizers consist of a stack of parallel transparent plates that are placed in series. They are mainly used in the ultraviolet and infrared parts of the spectrum. Normally, light is incident at each interface at the Brewster angle such that all thep- polarized light and only some of the ⁇ -polarized light is transmitted. If a sufficient number of such plates are placed in series, the transmitted light can be highly polarized and have a high extinction ratio. Although these polarizers act over a very broad spectral region, their angular field is limited. Reflection polarizers are based on a similar principle but use light reflected from one or more surfaces to polarize a light beam. One advantage of this polarizer is that its performance is independent of the wavelength. However, its performance is very sensitive to the angle of the incident beam. An additional complication is that the reflected light propagates in a different direction from that of the incident light.
- the means for combining the encoded beams is preferably the same discriminator employed to separate the uncoded beams in to s- and p- polarized beams, in which case the encoded beams are reflected back into the device in accordance with a scheme that depends on the type of spatial modulators employed. However, this is not necessary and it is equally possible to combine the beams with a second similar polarizing beam discriminator downstream of the first. Instead of reflecting the encoded beams back into the first device, the encoded beams are transmitted to a second device where they are combined into the output beam.
- Fig. 5. shows another three-dimensional view of the phase change on reflection fo ⁇ p- polarized light as in Fig. 4;
- Fig. 13 shows the calculated transmittance curves for s-polarized light as a function of wavelength ratio for the same thin film systems as shown in Fig. 12.
- the angle of incidence ⁇ is 57.3°.
- Fig. 14 shows the calculated reflectance curves for / ⁇ -polarized light as a function of wavelength ratio for the same thin film systems as shown in Fig. 12.
- the angle of incidence #> is 57.3°.
- Fig. 25 is a cross-sectional view of another embodiment of a thin film polarizing device in accordance with the present invention.
- the device acts also as a polarizer and only reflected / ⁇ -polarized light is used;
- the basic structure 186 has (2Z.-1 ) alternatively low and high refractive index layers and the layers are embedded between two identical substrates
- the shapes of the two prisms 250 and 254 are different.
- the thin film coating is also deposited at the hypotenuse interface.
- the thin film polarizing device is also configured as a reflective polarizer and only the reflected -polarized light is used.
- the transmitted s- polarized light is absorbed by a light absorber 256.
- a light absorber 256 In the arrangements shown in Figs. 26 and
- the transmitted s-polarized light exiting the end face 409 is then incident upon the second "X" colour cube 447.
- the coating 460 reflects red light and transmits green light.
- the coating 461 reflects blue light and transmits green light.
- the red, green and blue light beams are separated by the second "X" colour cube 447 and are incident upon the three corresponding monochrome reflective imaging elements 443, 444, and 445 respectively. These monochrome reflective imaging elements are fed with the corresponding colour images. For "on" pixels, the polarization of the light is rotated 90° by all three imaging elements, therefore the s-polarized light becomes as p-polarized.
- DMDs is reflected at an "off angle about 20° from the incident beam and is directed to the second polarizing device 400 2 . Since the polarization is not changed by the DMD and light is reflected again by the second thin film polarizing device 400 2 and is projected to a screen 406. For “off pixels, the light from the DMD is reflected at an "off angle about 60° from the incident beam and is out of the collecting angle of the projection lens and is absorbed by an absorber. In this case, the projected image only consists of s-polarized light.
- the offset is approximately a distance between the eyes of an average person or a distance related thereto and to the nature of the camera lenses employed.
- the scene recorded by the first camera is viewed by only one of the viewer's eyes.
- the scene recorded by the second camera is viewed by the other of the viewer's eyes.
- the configuration shown and described with reference to Fig. 52 lends itself to this 3-D recording and viewing.
- the thin film polarizing device acts both as the first and as the second polarizer. It has high transmittance and reflectance for the desired polarization, broad bandwidth, larger angular field and very high extinction ratios for both transmitted and reflected light. All light is used for imaging and no light is lost due to undesired polarization and by the thin film polarizing device. Therefore, it solves the problems associated with the use of dichroic sheet polarizers in conventional liquid crystal displays.
- the preferred display systems are high efficient and can employ high power light sources because of the use of both planes of polarization and the non-absorbing nature of the thin film polarizing devices.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
Dispositif d'affichage de projection comprenant un diviseur/combineur de faisceau de polarisation à couche mince comportant un premier et un deuxième substrats transmettant la lumière sous forme de prismes, ainsi qu'une pluralité de couches minces situées entre les prismes. Ces couches minces possèdent des épaisseurs prédéterminées et des indices de réfraction permettant de séparer la lumière en faisceaux lumineux s-polarisés et p-polarisés. On utilise simultanément à la fois la réflexion intérieure totale frustrée et l'interférence des couches minces, de manière à permettre la transmission de la lumière s-polarisée et la réflexion de la lumière p-polarisée sur une plage importante de longueurs d'ondes et d'angles d'incidence. Ce dispositif comprend, de plus, deux modulateurs de lumière spatiaux servant à coder une image à projeter. On obtient un affichage tridimensionnel en appliquant un signal différent à chaque modulateur spatial.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US09/051,403 US5982541A (en) | 1996-08-12 | 1997-08-13 | High efficiency projection displays having thin film polarizing beam-splitters |
| EP97935403A EP0855121A1 (fr) | 1996-08-13 | 1997-08-13 | Dispositif d'affichage de projection extremement efficace possedant des diviseurs de faisceau de polarisation a couche mince |
| CA002233597A CA2233597C (fr) | 1996-08-12 | 1997-08-13 | Dispositif d'affichage de protection extremement efficace possedant des diviseurs de faisceau de polarisation a couche mince |
| US08/967,497 US5884383A (en) | 1995-06-06 | 1997-11-11 | Method of securing a coupling to an end of a composite pipe |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/694,415 US5912762A (en) | 1996-08-12 | 1996-08-12 | Thin film polarizing device |
| CA2,183,188 | 1996-08-13 | ||
| CA002183188A CA2183188A1 (fr) | 1996-08-13 | 1996-08-13 | Ecran de projection a rendement eleve comportant un diviseur de faisceau a polarisation en couches minces |
| US2341296P | 1996-08-14 | 1996-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1998007279A1 true WO1998007279A1 (fr) | 1998-02-19 |
Family
ID=46203175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CA1997/000567 WO1998007279A1 (fr) | 1995-06-06 | 1997-08-13 | Dispositif d'affichage de projection extremement efficace possedant des diviseurs de faisceau de polarisation a couche mince |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2233597C (fr) |
| WO (1) | WO1998007279A1 (fr) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1095297A1 (fr) * | 1999-05-11 | 2001-05-02 | Thomson-Csf | Separateur de polarisations |
| US6310712B1 (en) | 1997-10-29 | 2001-10-30 | Teloptics Corporation | Discrete element light modulating microstructure devices |
| US6462873B1 (en) * | 2000-07-14 | 2002-10-08 | Univ Hong Kong Science & Techn | Polarizing beam splitter |
| WO2004004326A1 (fr) * | 2002-06-27 | 2004-01-08 | Koninklijke Philips Electronics N.V. | Diviseur de faisceau a trajet optique replie pour ecran de retroprojection |
| DE10361915A1 (de) * | 2003-12-29 | 2005-07-28 | Bausenwein, Bernhard, Dr. | 2-Kanal-Stereo-Bildanzeigevorrichtung mit mikroelektromechanischen Systemen |
| EP1008895A4 (fr) * | 1998-05-20 | 2005-12-07 | Fujitsu General Ltd | Projecteur a cristaux liquides |
| EP1585344A3 (fr) * | 1998-09-29 | 2008-01-02 | Sony Corporation | Dispositif d'affichage de type projecteur |
| US10477194B2 (en) | 2012-04-25 | 2019-11-12 | 3M Innovative Properties Company | Two imager projection device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988010545A1 (fr) * | 1987-06-19 | 1988-12-29 | Fraunhofer-Gesellschaft Zur Förderung Der Angewand | Dispositif de projection |
| EP0361559A2 (fr) * | 1988-08-26 | 1990-04-04 | Koninklijke Philips Electronics N.V. | Dispositif de projection d'image |
| US5181054A (en) * | 1990-08-10 | 1993-01-19 | Thomson-Csf | Device for the projection of images using two orthogonal components of light polarization |
| EP0560636A1 (fr) * | 1992-03-13 | 1993-09-15 | Sharp Kabushiki Kaisha | Dispositif d'affichage à crystal liquide du type à projection |
| WO1993024857A1 (fr) * | 1992-06-01 | 1993-12-09 | Bell Communications Research, Inc. | Systeme d'affichage independant de la polarisation |
| US5453859A (en) * | 1993-06-03 | 1995-09-26 | Matsushita Electric Industrial Co., Ltd. | Polarization beam splitter and projection display apparatus |
| US5517340A (en) * | 1995-01-30 | 1996-05-14 | International Business Machines Corporation | High performance projection display with two light valves |
| WO1997007418A1 (fr) * | 1995-08-14 | 1997-02-27 | National Research Council Of Canada | Dispositif polarisant a couches minces |
-
1997
- 1997-08-13 WO PCT/CA1997/000567 patent/WO1998007279A1/fr not_active Application Discontinuation
- 1997-08-13 CA CA002233597A patent/CA2233597C/fr not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988010545A1 (fr) * | 1987-06-19 | 1988-12-29 | Fraunhofer-Gesellschaft Zur Förderung Der Angewand | Dispositif de projection |
| EP0361559A2 (fr) * | 1988-08-26 | 1990-04-04 | Koninklijke Philips Electronics N.V. | Dispositif de projection d'image |
| US5181054A (en) * | 1990-08-10 | 1993-01-19 | Thomson-Csf | Device for the projection of images using two orthogonal components of light polarization |
| EP0560636A1 (fr) * | 1992-03-13 | 1993-09-15 | Sharp Kabushiki Kaisha | Dispositif d'affichage à crystal liquide du type à projection |
| WO1993024857A1 (fr) * | 1992-06-01 | 1993-12-09 | Bell Communications Research, Inc. | Systeme d'affichage independant de la polarisation |
| US5453859A (en) * | 1993-06-03 | 1995-09-26 | Matsushita Electric Industrial Co., Ltd. | Polarization beam splitter and projection display apparatus |
| US5517340A (en) * | 1995-01-30 | 1996-05-14 | International Business Machines Corporation | High performance projection display with two light valves |
| WO1997007418A1 (fr) * | 1995-08-14 | 1997-02-27 | National Research Council Of Canada | Dispositif polarisant a couches minces |
Non-Patent Citations (2)
| Title |
|---|
| BERGSTEIN LEONARD: "Novel Thin-Film Polarizer for the Visible and Infra-red", JOURNAL OF THE OPTICAL SOCIETY OF AMERICA: PAPER NUMBER TUD18 OF THE 1971 SPRING MEETING OF THE OPTICAL SOCIETY OF AMERICA, TUCSON, AZ, USA, vol. 61, 5 April 1971 (1971-04-05) - 8 April 1971 (1971-04-08), NEW YORK US, pages 24A, XP002045068 * |
| LEES DAVID ET AL: "Versatile Frustrated-Total-Reflection Polarizer for the Infrared", OPTICS LETTERS, vol. 4, no. 2, February 1979 (1979-02-01), WASHINGTON US, pages 66 - 67, XP002045069 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6310712B1 (en) | 1997-10-29 | 2001-10-30 | Teloptics Corporation | Discrete element light modulating microstructure devices |
| EP1008895A4 (fr) * | 1998-05-20 | 2005-12-07 | Fujitsu General Ltd | Projecteur a cristaux liquides |
| EP1585344A3 (fr) * | 1998-09-29 | 2008-01-02 | Sony Corporation | Dispositif d'affichage de type projecteur |
| EP1095297A1 (fr) * | 1999-05-11 | 2001-05-02 | Thomson-Csf | Separateur de polarisations |
| US6462873B1 (en) * | 2000-07-14 | 2002-10-08 | Univ Hong Kong Science & Techn | Polarizing beam splitter |
| WO2004004326A1 (fr) * | 2002-06-27 | 2004-01-08 | Koninklijke Philips Electronics N.V. | Diviseur de faisceau a trajet optique replie pour ecran de retroprojection |
| DE10361915A1 (de) * | 2003-12-29 | 2005-07-28 | Bausenwein, Bernhard, Dr. | 2-Kanal-Stereo-Bildanzeigevorrichtung mit mikroelektromechanischen Systemen |
| DE10361915B4 (de) * | 2003-12-29 | 2009-03-05 | Bausenwein, Bernhard, Dr. | 2-Kanal-Stereo-Bildanzeigevorrichtung mit mikroelektromechanischen Systemen |
| US10477194B2 (en) | 2012-04-25 | 2019-11-12 | 3M Innovative Properties Company | Two imager projection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2233597C (fr) | 2004-02-24 |
| CA2233597A1 (fr) | 1998-02-19 |
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