JP2007310036A5 - - Google Patents
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- JP2007310036A5 JP2007310036A5 JP2006137099A JP2006137099A JP2007310036A5 JP 2007310036 A5 JP2007310036 A5 JP 2007310036A5 JP 2006137099 A JP2006137099 A JP 2006137099A JP 2006137099 A JP2006137099 A JP 2006137099A JP 2007310036 A5 JP2007310036 A5 JP 2007310036A5
- Authority
- JP
- Japan
- Prior art keywords
- light
- beam splitter
- polarization beam
- image
- polarization
- 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.)
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- 230000003287 optical Effects 0.000 claims 5
- 238000005286 illumination Methods 0.000 claims 4
- 238000000926 separation method Methods 0.000 claims 4
- 230000002194 synthesizing Effects 0.000 claims 4
- 238000002834 transmittance Methods 0.000 claims 4
- 230000015572 biosynthetic process Effects 0.000 claims 3
- 238000003786 synthesis reaction Methods 0.000 claims 3
- 230000000051 modifying Effects 0.000 claims 2
- FKDHHVKWGRFRTG-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine Chemical compound [N-]1OC(=N)C=[N+]1N1CCOCC1 FKDHHVKWGRFRTG-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
Claims (3)
前記照明系は、偏光変換素子を有しており、光源からの無偏光光を所定の偏光に変換し、
前記色分離合成系は、前記照明系からの白色光をRGBに分離して、前記ライトバルブに導き、各画像光を合成する手段であり、
前記色分離合成系は、照明系から出射された光のうちRB成分を反射させ、G成分を透過させて、色分離するダイクロイックミラーと、RB成分の光のうちのRとBのいずれか一方の光の偏波面を90°回転させ、他方の光は偏波面を変化させないことによって、Rの光をS偏光、Bの光をP偏光とする波長選択性位相板と、Rの光をRのライトバルブ側に反射させ、Bの光をBのライトバルブ側に透過するプリズム形状のRB用の偏光ビームスプリッターと、前記ライトバルブで画像変調を受けた画像光であって前記RB用の偏光ビームスプリッターから出射した後のBの光を検光する偏光板と、前記ダイクロイックミラーを透過したGの光をGのライトバルブ側に導くプリズム形状のG用の偏光ビームスプリッターと、前記Gのライトバルブで画像変調を受けた画像光であって前記G用の偏光ビームスプリッターから出射した後の光を検光する偏光板と、前記RGBの画像光を合成して前記投射光学系に導くとともに、Rの光を検光する作用を有する合成プリズムと、から構成され、
前記Gのライトバルブに入射する光線角度をθ、前記G用の偏光ビームスプリッターの屈折率をnとするとき、前記Gの偏光ビームスプリッターの膜面の光線入射角度βは、
β=45°+sin−1(1/n×sinθ)
と表され、前記ダイクロイックミラーの光線入射角度αは、
α=45°−θ
と表され、
前記波長選択性位相板において透過率が5%となる長波長側の波長をWaとしたとき、W<Waなる波長域Wの前記Gの偏光ビームスプリッターの膜面へ角度βで入射した光について、前記所定の偏波面がライトバルブに入射する光の前記G用の偏光ビームスプリッターの透過率を100%としたとき、該偏波面を90°回転した光の前記透過率が5%以下となることを特徴とする画像投射装置。 An image projection apparatus comprising a light source, an illumination optical system, a color separation / synthesis system, a reflective light valve as an image forming element, and a projection optical system,
The illumination system has a polarization conversion element, converts non-polarized light from the light source into predetermined polarized light,
The color separation / synthesis system is means for separating the white light from the illumination system into RGB, guiding it to the light valve, and synthesizing each image light,
Prior Symbol color separation synthesis system reflects the RB component of light emitted from the illumination system, by transmitting the G component, and the dichroic mirror for color separation, either R and B of the light of the RB components By rotating the polarization plane of one light by 90 ° and not changing the polarization plane of the other light, a wavelength-selective phase plate with R light as S-polarized light and B light as P-polarized light, and R light as is reflected on the light valve side of the R, and the polarization beam splitter for RB prism shape that transmits light of B to the light valve side of B, the use RB an image light received images modulated by the light valve a polarizing plate for analyzing the light of B after emitted from the polarization beam splitter, a polarization beam splitter for G prism-shaped guiding light G having passed through the dichroic mirror to the light valve side of G, said G Light bar A polarizing plate for analyzing the light after exiting an image light undergoing image modulation from the polarization beam splitter for the G in Bed, guides the projection optical system by combining the image light of the RGB, a composite prism having a function for analyzing the light of R, is composed of,
The ray angle incident on the light valve of the G theta, when the refractive index of the polarization beam splitter over for the G and n, light incident angle β of the film surface of the polarizing beam splitter of said G is
β = 45 ° + sin −1 (1 / n × sin θ)
The light incident angle α of the dichroic mirror is
α = 45 ° -θ
And
With respect to light incident at an angle β on the film surface of the G polarization beam splitter in the wavelength region W where W <Wa, where Wa is the wavelength on the long wavelength side where the transmittance is 5% in the wavelength selective phase plate. , when the previous SL predetermined polarization plane defined as 100% transmittance of the polarization beam splitter of the for G light incident on the light valve, the transmittance of light by rotating the polarization plane 90 ° 5% or less and An image projection apparatus characterized by comprising:
Ts(β)≦5%
を満足することを特徴とする請求項1に記載の画像投射装置。 When the predetermined polarization plane is P-polarized light and the transmittance with S-polarized light at an incident angle β to the film surface of the polarization beam splitter in the G optical path is Ts (β)
Ts (β) ≦ 5%
The image projection apparatus according to claim 1, wherein:
Rp(β)≦5%
を満足することを特徴とする請求項1に記載の画像投射装置。 The predetermined polarization plane is S-polarized light, and the reflectance with P-polarized light at an incident angle β to the film surface of the polarization beam splitter in the Green optical path is Rp (β)
Rp (β) ≦ 5%
The image projection apparatus according to claim 1, wherein:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006137099A JP5074704B2 (en) | 2006-05-16 | 2006-05-16 | Image projection device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006137099A JP5074704B2 (en) | 2006-05-16 | 2006-05-16 | Image projection device |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2007310036A JP2007310036A (en) | 2007-11-29 |
JP2007310036A5 true JP2007310036A5 (en) | 2009-07-02 |
JP5074704B2 JP5074704B2 (en) | 2012-11-14 |
Family
ID=38842969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006137099A Expired - Fee Related JP5074704B2 (en) | 2006-05-16 | 2006-05-16 | Image projection device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP5074704B2 (en) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3544282B2 (en) * | 1996-05-09 | 2004-07-21 | パイオニア株式会社 | Projection type image display device |
JPH11295658A (en) * | 1998-04-07 | 1999-10-29 | Sony Corp | Liquid crystal projector |
JP3762272B2 (en) * | 2001-09-04 | 2006-04-05 | キヤノン株式会社 | Color separation / synthesis optical system, image display optical system, and projection type image display apparatus |
JP2003233124A (en) * | 2002-02-13 | 2003-08-22 | Minolta Co Ltd | Projection optical system |
JP2006071761A (en) * | 2004-08-31 | 2006-03-16 | Canon Inc | Polarizing beam splitter and image display device using the same |
JP5127143B2 (en) * | 2006-02-09 | 2013-01-23 | キヤノン株式会社 | Color separation optical system and image projection apparatus |
-
2006
- 2006-05-16 JP JP2006137099A patent/JP5074704B2/en not_active Expired - Fee Related
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