JP2003337375A5 - - Google Patents
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- JP2003337375A5 JP2003337375A5 JP2002145161A JP2002145161A JP2003337375A5 JP 2003337375 A5 JP2003337375 A5 JP 2003337375A5 JP 2002145161 A JP2002145161 A JP 2002145161A JP 2002145161 A JP2002145161 A JP 2002145161A JP 2003337375 A5 JP2003337375 A5 JP 2003337375A5
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- axis
- projector
- optical
- polarization separation
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- 230000003287 optical effect Effects 0.000 claims 28
- 238000000926 separation method Methods 0.000 claims 19
- 230000010287 polarization Effects 0.000 claims 18
- 238000005286 illumination Methods 0.000 claims 11
- 239000004973 liquid crystal related substance Substances 0.000 claims 9
- 230000005540 biological transmission Effects 0.000 claims 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000013078 crystal Substances 0.000 claims 1
- 238000003786 synthesis reaction Methods 0.000 claims 1
Claims (14)
この照明装置からの偏光光束を変調する透過型液晶パネルと、
この透過型液晶パネルの出射面側に配置された偏光分離素子であって、入射面が光軸に対して略４５度傾斜した状態で配置され、前記透過型液晶パネルの透過光を２つの直交成分に分離して、一方の直線偏光を透過し、他方の直線偏光を反射する偏光分離素子と、
この偏光分離素子の出射面側又は反射面側に配置された出射側偏光板と、
この出射側偏光板を透過した光束をスクリーン上などに拡大投写する投写レンズと、を備えたプロジェクタにおいて、
前記照明装置と前記出射側偏光板との間に、前記偏光分離素子における光束の偏光軸の回転を補償する光学補償板をさらに備えたことを特徴とするプロジェクタ。An illumination device that emits a polarized light beam;
A transmissive liquid crystal panel that modulates a polarized light beam from the illumination device;
A polarization separation element disposed on the output surface side of the transmissive liquid crystal panel, the incident surface being disposed with an inclination of approximately 45 degrees with respect to the optical axis, and transmitting light transmitted through the transmissive liquid crystal panel in two orthogonal directions A polarization separation element that separates into components and transmits one linearly polarized light and reflects the other linearly polarized light;
An exit-side polarizing plate disposed on the exit surface side or the reflection surface side of the polarization separation element;
In a projector provided with a projection lens that enlarges and projects the light beam that has passed through the output-side polarizing plate onto a screen or the like,
A projector, further comprising an optical compensator that compensates for rotation of a polarization axis of a light beam in the polarization separation element between the illumination device and the output-side polarizing plate.
この照明装置からの偏光光束を変調する透過型液晶パネルと、
この透過型液晶パネルの出射面側に配置された偏光分離素子であって、入射面が光軸に対して略４５度傾斜した状態で配置され、前記透過型液晶パネルの透過光を２つの直交成分に分離して、一方の直線偏光を透過し、他方の直線偏光を反射する偏光分離素子と、
前記偏光分離素子で分離された一方の出力光をスクリーン上などに拡大投写する投写レンズと、を備えたプロジェクタにおいて、
前記照明装置と前記偏光分離素子との間に、前記偏光分離素子における光束の偏光軸の回転を補償する光学補償板をさらに備えたことを特徴とするプロジェクタ。An illumination device that emits a polarized light beam;
A transmissive liquid crystal panel that modulates a polarized light beam from the illumination device;
A polarization separation element disposed on the output surface side of the transmissive liquid crystal panel, the incident surface being disposed with an inclination of approximately 45 degrees with respect to the optical axis, and transmitting light transmitted through the transmissive liquid crystal panel in two orthogonal directions A polarization separation element that separates into components and transmits one linearly polarized light and reflects the other linearly polarized light;
In a projector comprising a projection lens that enlarges and projects one output light separated by the polarization separation element onto a screen or the like,
A projector further comprising an optical compensation plate for compensating for rotation of a polarization axis of a light beam in the polarization separation element between the illumination device and the polarization separation element.
前記光学補償板は、入射面が前記偏光分離素子の透過軸と反射軸とで構成される第１の平面に垂直な軸を回転軸として、光軸に対して所定角度傾斜した状態で配置された光学補償板であることを特徴とするプロジェクタ。The projector according to claim 1 or 2,
The optical compensator is disposed in a state in which an incident surface is inclined at a predetermined angle with respect to an optical axis with an axis perpendicular to a first plane constituted by a transmission axis and a reflection axis of the polarization separation element as a rotation axis. A projector characterized by being an optical compensator.
前記光学補償板は、遅相軸が前記第１の平面に垂直な軸を回転軸として、光軸に対して前記所定角度傾斜している光学補償板であることを特徴とするプロジェクタ。The projector according to claim 3, wherein
The projector according to claim 1, wherein the optical compensator is an optical compensator in which a slow axis is inclined at the predetermined angle with respect to an optical axis with an axis perpendicular to the first plane as a rotation axis.
前記光学補償板は、前記透過型液晶パネルと平行に配置されるとともに、遅相軸が前記偏光分離素子の透過軸と反射軸とで構成される第１の平面に垂直な軸を回転軸として、光軸に対して所定角度傾斜している光学補償板であることを特徴とするプロジェクタ。The projector according to claim 1 or 2,
The optical compensator is disposed in parallel with the transmissive liquid crystal panel, and a slow axis is an axis perpendicular to a first plane formed by the transmission axis and the reflection axis of the polarization separation element. A projector comprising an optical compensator inclined at a predetermined angle with respect to the optical axis.
前記光学補償素子は、複屈折率フィルム、一軸性単結晶又は液晶フィルムであることを特徴とするプロジェクタ。The projector according to any one of claims 1 to 5,
The projector according to claim 1, wherein the optical compensation element is a birefringence film, a uniaxial single crystal, or a liquid crystal film.
前記偏光分離素子は、その偏光分離面が誘電体多層膜又は回折格子により構成されてなることを特徴とするプロジェクタ。The projector according to any one of claims 1 to 6,
The polarization separation element has a polarization separation surface formed of a dielectric multilayer film or a diffraction grating.
前記偏光分離素子は、貼り合わせ面が偏光分離面になるように２枚の三角柱プリズムを貼り合わせて得られる直方体プリズムであって、その光軸方向に平行な辺の長さが光軸に直交する方向に平行ないずれの辺の長さより短い直方体プリズムであることを特徴とするプロジェクタ。The projector according to any one of claims 1 to 7,
The polarization separation element is a rectangular parallelepiped prism obtained by bonding two triangular prisms so that the bonding surface is a polarization separation surface, and the length of the side parallel to the optical axis direction is orthogonal to the optical axis A projector having a rectangular parallelepiped shorter than the length of any side parallel to the direction to be projected.
前記照明装置と前記透過型液晶パネルとの間に、入射側偏光板をさらに備えたことを特徴とするプロジェクタ。The projector according to any one of claims 1 to 8,
A projector further comprising an incident-side polarizing plate between the illumination device and the transmissive liquid crystal panel.
この照明装置からの光をダイクロイックミラーの作用により複数の色光に分離する色分離装置と、
この色分離装置で分離された複数の色光をそれぞれ変調する複数の電気光学変調装置と、
前記電気光学変調装置で変調された色光を合成する色合成装置と、
この色合成装置で合成された光をスクリーン上などに投写する投写レンズと、を備えたプロジェクタにおいて、
前記照明装置と前記電気光学変調装置との間に、前記色分離装置における偏光光束の偏光軸の回転を補償する光学補償板をさらに備えたことを特徴とするプロジェクタ。An illumination device that emits a polarized light beam;
A color separation device that separates light from the illumination device into a plurality of color lights by the action of a dichroic mirror;
A plurality of electro-optic modulation devices that respectively modulate a plurality of color lights separated by the color separation device;
A color synthesizer that synthesizes the color light modulated by the electro-optic modulator;
In a projector including a projection lens that projects light synthesized by the color synthesis device onto a screen or the like,
A projector further comprising an optical compensation plate for compensating for rotation of a polarization axis of a polarized light beam in the color separation device between the illumination device and the electro-optic modulation device.
前記光学補償素子は、前記色分離装置における前記照明装置に最も近い側に配置されたダイクロイックミラーと、前記電気光学変調装置との間に、各色光毎に配置されてなることを特徴とするプロジェクタ。The projector according to claim 10, wherein
The projector is characterized in that the optical compensation element is arranged for each color light between a dichroic mirror arranged on the side of the color separation device closest to the illumination device and the electro-optic modulation device. .
前記光学補償板は、入射面が前記ダイクロイックミラーの透過軸と反射軸とで構成される第２の平面に垂直な軸を回転軸として、光軸に対して所定角度傾斜した状態で配置された光学補償板であることを特徴とするプロジェクタ。The projector according to claim 10 or 11,
The optical compensator is disposed in a state where the incident surface is inclined at a predetermined angle with respect to the optical axis, with the axis perpendicular to the second plane formed by the transmission axis and the reflection axis of the dichroic mirror as a rotation axis A projector characterized by being an optical compensator.
前記光学補償板は、遅相軸が前記第２の平面に垂直な軸を回転軸として、光軸に対して前記所定角度傾斜している光学補償板であることを特徴とするプロジェクタ。The projector according to claim 12, wherein
The projector according to claim 1, wherein the optical compensator is an optical compensator inclined at the predetermined angle with respect to the optical axis with a slow axis as an axis of rotation that is perpendicular to the second plane.
前記光学補償板は、前記光軸に対して垂直に配置されるとともに、遅相軸が前記ダイクロイックミラーの透過軸と反射軸とで構成される第２の平面に垂直な軸を回転軸として、光軸に対して所定角度傾斜している光学補償板であることを特徴とするプロジェクタ。The projector according to claim 10 or 11,
The optical compensator is disposed perpendicular to the optical axis, and a slow axis is an axis perpendicular to a second plane constituted by a transmission axis and a reflection axis of the dichroic mirror, A projector comprising an optical compensator inclined at a predetermined angle with respect to an optical axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002145161A JP2003337375A (en) | 2002-05-20 | 2002-05-20 | Projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002145161A JP2003337375A (en) | 2002-05-20 | 2002-05-20 | Projector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003337375A JP2003337375A (en) | 2003-11-28 |
| JP2003337375A5 true JP2003337375A5 (en) | 2005-10-06 |
Family
ID=29704597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002145161A Withdrawn JP2003337375A (en) | 2002-05-20 | 2002-05-20 | Projector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003337375A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4652110B2 (en) * | 2005-04-21 | 2011-03-16 | 株式会社日立製作所 | Projection-type image display device |
| JP4967253B2 (en) * | 2005-05-20 | 2012-07-04 | ソニー株式会社 | Optical device and projection device |
| WO2007021981A2 (en) * | 2005-08-12 | 2007-02-22 | Colorlink, Inc. | Contrast enhancement for liquid crystal based projection systems |
| US7673993B2 (en) * | 2005-12-22 | 2010-03-09 | 3M Innovative Properties Company | Projection system using reflective polarizers |
| JP5423768B2 (en) * | 2011-11-04 | 2014-02-19 | ソニー株式会社 | Optical device and projection device |
-
2002
- 2002-05-20 JP JP2002145161A patent/JP2003337375A/en not_active Withdrawn
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