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    • 1. 发明授权
    • Infrared polarizer
    • 红外线偏振片
    • US5513035A
    • 1996-04-30
    • US294951
    • 1994-08-24
    • Yoshito MiyatakeShinya Sannohe
    • Yoshito MiyatakeShinya Sannohe
    • G02B5/30G02B27/28H04N9/31G02B1/08G02B1/10
    • H04N9/3167G02B27/283G02B5/3033H04N9/3105
    • A polarizer comprising; a substrate transparent to a light of actual use and optical thin films of a higher refractive index than that of said substrate deposited on both surfaces of said substrate. The substrate is arranged so as to receive the incident light obliquely thereto. When the incident angle and the thickness of the optical thin film are optimally selected, the transmittance for the P polarized light can be made approximately 100%, while that for the S polarized light very small. The polarizer can extract a substantially linearly polarized light from natural light, A projection image display system has the polarizer as its pre-polarizer. The polarizer is also useful for infrared radiation.
    • 一种偏振器,包括: 对实际使用的光透明的衬底和比沉积在所述衬底的两个表面上的所述衬底的折射率更高的光学薄膜。 基板被布置成倾斜地接收入射光。 当光学薄膜的入射角度和厚度被最佳选择时,P偏振光的透射率可以大致为100%,而S偏振光的透射率非常小。 偏振器可以从自然光中提取基本上线性的偏振光。投影图像显示系统具有偏振器作为其预偏振器。 偏振器也可用于红外辐射。
    • 5. 发明授权
    • Polarization beam splitter and projection display apparatus
    • 极化分束器和投影显示装置
    • US5453859A
    • 1995-09-26
    • US252319
    • 1994-06-01
    • Shinya SannoheYoshito Miyatake
    • Shinya SannoheYoshito Miyatake
    • G02B5/30G02B27/28G02F1/1335G02F1/13357H04N9/31G03B21/14
    • G02B27/283G02F1/133536G02F1/13362G02F2001/13355
    • A polarization beam splitter which includes a first prism, a second prism, and a dielectric multilayer film which is sandwiched between the first and second prisms is disclosed. The dielectric multilayer film comprising: a plurality of high refractive index layers having a refractive index higher than refractive indices of the first and second prisms; a plurality of intermediate refractive index layers having a refractive index lower than the refractive index of the high refractive index layers; and a plurality of low refractive index layers having a refractive index lower than the refractive index of the intermediate refractive index layers, a reference incident angle .theta..sub.0 of light which is incident on the dielectric multilayer film through the first or second prism being within a range of the following expression:.theta..sub.1
    • 公开了一种偏振分束器,其包括夹在第一和第二棱镜之间的第一棱镜,第二棱镜和电介质多层膜。 所述电介质多层膜包括:折射率高于所述第一和第二棱镜的折射率的多个高折射率层; 多个折射率低于高折射率层的折射率的中间折射率层; 以及折射率低于中间折射率层的折射率的多个低折射率层,通过第一或第二棱镜入射在电介质多层膜上的光的参考入射角θ0在一定范围内 其中n H表示高折射率层的折射率,nM表示中间折射率层的折射率,nL表示折射率的折射率, 低折射率层的折射率,n0表示第一和第二棱镜的折射率。
    • 6. 发明授权
    • Projection lens and projection display apparatus
    • 投影镜头和投影显示装置
    • US5795047A
    • 1998-08-18
    • US568473
    • 1995-12-07
    • Shinya SannoheYoshito Miyatake
    • Shinya SannoheYoshito Miyatake
    • G02B13/16G02B27/28H04N9/31G03B21/14
    • H04N9/3105G02B13/16G02B27/283
    • A projection lens includes sequentially from a screen side a first lens group which has a negative power, a second lens group which has a weaker power than that of the first lens group, a third lens group which has a positive power, a fourth lens group which has a positive power, and at least one transparent prism, wherein the fourth lens group is placed on the third lens group side of the transparent prism so as to be close to or in contact with the transparent prism. In the projection lens, a back focus of the main lens group is much longer compared with a focal length. A projection display apparatus using this projection lens is composed of one main lens group, three auxiliary lenses, and three polarizer-beam splitters, and a color combining optical system for combining three primary color components of red, green, and blue into one light beam is placed between the main lens group and the auxiliary lens.
    • 投影透镜从屏幕侧依次包括具有负电源的第一透镜组,具有比第一透镜组弱的第二透镜组,具有正光焦度的第三透镜组,第四透镜组 其具有正的功率,以及至少一个透明棱镜,其中所述第四透镜组被放置在所述透明棱镜的所述第三透镜组侧,以便接近所述透明棱镜或与所述透明棱镜接触。 在投影透镜中,主透镜组的后焦距比焦距长得多。 使用这种投影透镜的投影显示装置由一个主透镜组,三个辅助透镜和三个偏振器分束器组成,并且用于将红色,绿色和蓝色的三个原色分量组合成一个光束的颜色组合光学系统 放置在主透镜组和辅助透镜之间。
    • 7. 发明授权
    • Polarization plane rotator applicable to polarization converter and
projection display system
    • 偏振平面旋转器适用于偏振转换器和投影显示系统
    • US5657160A
    • 1997-08-12
    • US160751
    • 1993-12-03
    • Yoshito MiyatakeShinya Sannohe
    • Yoshito MiyatakeShinya Sannohe
    • G02B5/30G02B27/28G02F1/13H04N5/74H04N9/31
    • H04N9/3152G02B27/283G02B27/286H04N5/7441H04N9/3167
    • A polarization plane rotator, for executing rotation of the plane of polarization of linearly polarized light that is incident thereon with a predetermined angle of incidence, is formed of a transparent prism or an array of such prisms, each prism having a triangular cross-sectional shape, with first, second and third surfaces having respective lines of intersection that are mutually parallel. The linearly polarized light is incident on the first surface, to be reflected twice in succession at the second and third surfaces, to be emitted from the first surface with the plane of polarization rotated by 90.degree. and the direction of propagation altered. An optical thin film is formed on the second and third surfaces, for substantially reducing an amount of phase difference between the P and S polarization components which results from reflection, thereby ensuring that the emitted light is substantially completely linearly polarized. The polarization plane rotator can be combined with a polarizing beam splitter to form a polarization converter to implement a polarized light source having very high efficiency, suitable for use in a projection display system employing a polarization-dependent light valve.
    • 用于以预定入射角入射到其上的线偏振光的偏振平面的旋转的偏振面旋转体由透明棱镜或这种棱镜阵列形成,每个棱镜具有三角形横截面形状 ,其中第一,第二和第三表面具有相互平行的相应的交叉线。 直线偏振光入射在第一表面上,在第二和第三表面连续反射两次,从第一表面发射,偏振面旋转90°,传播方向改变。 在第二表面和第三表面上形成光学薄膜,用于基本上减少由反射产生的P和S偏振分量之间的相位差量,从而确保发射的光线基本上完全线性偏振。 偏振平面旋转器可以与偏振分束器组合以形成偏振转换器,以实现非常高效率的偏振光源,适用于采用偏振相关光阀的投影显示系统。
    • 8. 发明授权
    • Projection-type display apparatus
    • 投影型显示装置
    • US07033030B2
    • 2006-04-25
    • US11159717
    • 2005-06-23
    • Shinya SannoheHideki IshinagaTakamasa Yoshikawa
    • Shinya SannoheHideki IshinagaTakamasa Yoshikawa
    • G03B21/14G03B21/28G02B26/02G02B9/08G02F1/00
    • G02B5/005G02B26/0833G03B21/005G03B21/006
    • An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.
    • 一种用于将光源(1)的辐射光聚焦到反射光阀(6)和用于将来自反射光阀(6)的反射光放大并投影到屏幕上的投影透镜(7))的照明光学系统, 设置在投影透镜(7)的入射光瞳的基本共轭位置处的照明光学系统的光路上的隔膜(31),隔膜(31)具有通过光改变面积的开口 并且由遮光部件遮蔽的隔膜31的遮蔽部的形状与照明光学系统的光轴(12)旋转不对称。 因此,与用于以旋转对称的方式改变遮光区域的隔膜例如用于同心地缩小开口的隔膜相比,可以更好地避免必要的光的屏蔽,使得可以在最小化亮度降低的同时提高对比度性能。
    • 9. 发明授权
    • Projection display device
    • 投影显示设备
    • US07118227B2
    • 2006-10-10
    • US10470977
    • 2002-04-23
    • Shinya SannoheHideki IshinagaTakamasa Yoshikawa
    • Shinya SannoheHideki IshinagaTakamasa Yoshikawa
    • G03B21/14G03B21/28G02B26/02G02B9/08G02F1/00
    • G02B5/005G02B26/0833G03B21/005G03B21/006
    • An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.
    • 一种用于将光源(1)的辐射光聚焦到反射光阀(6)和用于将来自反射光阀(6)的反射光放大并投影到屏幕上的投影透镜(7))的照明光学系统, 设置在投影透镜(7)的入射光瞳的基本共轭位置处的照明光学系统的光路上的隔膜(31),隔膜(31)具有通过光改变面积的开口 并且由遮光部件遮蔽的隔膜31的遮蔽部的形状与照明光学系统的光轴(12)旋转不对称。 因此,与用于以旋转对称的方式改变遮光区域的隔膜例如用于同心地缩小开口的隔膜相比,可以更好地避免必要的光的屏蔽,使得可以在最小化亮度降低的同时提高对比度性能。