Projection type display apparatus
    4.
    发明授权
    Projection type display apparatus 有权
    投影式显示装置

    公开(公告)号:US06345895B1

    公开(公告)日:2002-02-12

    申请号:US09453397

    申请日:1999-12-03

    IPC分类号: G03B2100

    摘要: An analyzing-synthesizing optical system has the structure in which for each of the three primary colors of R, G, and B, there are provided a light valve for modulating incident light and a polarization beam splitter for guiding specific polarized light to this light valve and extracting only modulated light coming from the light valve to output it, wherein these light valves and polarization beam splitters are fixed as integrated with a synthesizing optical system comprising a cross dichroic prism and wherein optical path lengths of optical paths of the respective colors are adjusted to be almost equal to each other. A projection image display apparatus comprises the analyzing-synthesizing optical unit.

    摘要翻译: 分析合成光学系统具有这样的结构,其中,对于R,G和B的三原色中的每一种,设置有用于调制入射光的光阀和用于将特定偏振光引导到该光阀的偏振分束器 并且仅提取来自光阀的调制光以输出它们,其中这些光阀和偏振分束器被固定为与包括十字分色棱镜的合成光学系统集成,并且其中调节各种颜色的光路的光路长度 几乎相等。 投影图像显示装置包括分析合成光学单元。

    Projection type display apparatus
    7.
    发明授权
    Projection type display apparatus 失效
    投影式显示装置

    公开(公告)号:US6062694A

    公开(公告)日:2000-05-16

    申请号:US993528

    申请日:1997-12-18

    摘要: The present invention relates to a projection type display apparatus which utilizes a polarizing beam splitter and/or a color separating/combining optical system, each being constituted by an optically transparent material block having a specific characteristic, thereby being capable of securing optically stable performances against influences of various thermal and external stresses and suppressing image quality deterioration to a low level. In particular, in this projection type display apparatus, the polarizing beam splitter used for a polarized light separating optical system and analyzing optical system, and/or an optical member servicing as a color separating/combining optical system are constituted by an optically transparent material block in which a wavelength where the absolute value of a photoelastic constant becomes a minimum level exists in a wavelength range of a blue light component.

    摘要翻译: 本发明涉及一种使用偏振光束分离器和/或分色/组合光学系统的投影型显示装置,每一个由具有特定特性的光学透明材料块构成,从而能够确保光学上稳定的性能,抵抗 各种热应力和外部应力的影响,并将图像质量降低到低水平。 特别地,在这种投影型显示装置中,用于偏振光分离光学系统和分析光学系统的偏振分束器和/或维修为分色/组合光学系统的光学部件由光学透明的材料块 其中光弹性常数的绝对值变为最小电平的波长存在于蓝光分量的波长范围内。

    Optical transmission device
    9.
    发明授权
    Optical transmission device 失效
    光传输装置

    公开(公告)号:US4741595A

    公开(公告)日:1988-05-03

    申请号:US754928

    申请日:1985-07-15

    IPC分类号: G02B6/08 G02B6/42

    摘要: In a device for coupling optically a light source with an optical transmission path, the present invention interposes an optical transmission path structure at the center of the distance between them in order to improve the optical coupling efficiency. The optical transmission path structure consists of a plurality of light transmitting elements arranged so that the light from the light source is received by the structure as incident light and is sent out therefrom as outgoing light at an outgoing angle which is equal to the angle of incidence. The light transmitting elements are arranged in parallel with the optical path of the light emitted from the light source and according to this arrangement, the system of the present device becomes equivalent to a system in which the positions of the light source are located at points of .+-.l.sub.1 from the light outgoing surface of the optical transmission path structure. When used with an optical fiber, the optical transmission path structure is disposed such that the distance from the light source to one end face of the optical transmission path structure is the same as the distance from the end face of the means for transmitting to the other end face of the optical transmission path structure.

    摘要翻译: 为了提高光耦合效率,在将光源与光传输路径光学连接的装置中,本发明将光传输路径结构设置在它们之间的距离的中心。 光传输路径结构由多个透光元件组成,其布置成使得来自光源的光被该结构作为入射光被接收,并作为出射光从出射光发射出来,其出射角等于入射角 。 光传输元件与从光源发射的光的光路平行地布置,并且根据这种布置,本装置的系统变得等同于其中光源的位置位于 +/- l1从光传输路径结构的光出射表面。 当与光纤一起使用时,光传输路径结构被设置为使得从光源到光传输路径结构的一个端面的距离与从传输装置的端面到另一端的距离相同 光传输路径结构的端面。

    Projection-display apparatus
    10.
    发明授权
    Projection-display apparatus 有权
    投影显示装置

    公开(公告)号:US6141151A

    公开(公告)日:2000-10-31

    申请号:US363230

    申请日:1999-07-21

    IPC分类号: H04N5/74 H04N9/31 G02B27/10

    摘要: Apparatus are disclosed that provide a high-luminance projected image with no color shading or uneven contrast. Light from a light source undergoes color separation by passing through a color-separation optical system (e.g., a cross-dichroic mirror or cross-dichroic prism). The light from the light source can also be split into first and second polarized lights by passage through, e.g., a first polarized-light beamsplitter (PBS). Each color-separated light is modulated by a respective color-signal light valve and undergoes color combining by, e.g., a cross-dichroic prism. The second polarized light, if formed, is modulated by a luminance-signal light valve, undergoes color combining and polarized-light combining by, e.g., a second PBS, and is projected by a projection lens (that comprises an aperture stop). The PBSs, cross-dichroic mirrors, and cross-dichroic prisms are situated where principal rays (defined by the aperture stop) are parallel to the optical axis. The first PBS (if present) and color-separation optical system are preferably arranged between a front illumination lens group and a rear illumination lens group both comprising an illumination relay optical system telecentric on both front and rear sides thereof. Field lenses and relay lenses can be included that comprise a relay optical system forming a magnified image of the color-signal light valves at a position conjugate to the luminance-signal light valve with respect to the projection lens.

    摘要翻译: 公开了提供没有颜色阴影或不均匀对比度的高亮度投影图像的装置。 来自光源的光通过分色光学系统(例如,十字分色镜或交叉二向色棱镜)进行颜色分离。 来自光源的光也可以通过例如第一偏振光分束器(PBS)而分裂成第一和第二偏振光。 每个分色光由相应的颜色信号光阀调制,并通过例如交叉二向色棱镜进行颜色组合。 第二偏振光(如果形成)由亮度信号光阀调制,则通过例如第二PBS进行颜色组合和偏振光组合,并由投影透镜(包括孔径光阑)投影。 PBS,交叉二向色镜和交叉二向色棱镜位于主光线(由孔径光阑限定)平行于光轴的位置。 第一PBS(如果存在)和分色光学系统优选地布置在前照明透镜组和后照明透镜组之间,其均包括在其前后两侧的远心照明中继光学系统。 可以包括场透镜和中继透镜,其包括在与亮度信号光阀相对于投影透镜共轭的位置处形成彩色信号光阀的放大图像的中继光学系统。