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    • 1. 发明授权
    • Wide spectral bandwidth virtual image display optical system
    • 宽光谱带宽虚像显示光学系统
    • US5436763A
    • 1995-07-25
    • US223385
    • 1994-04-05
    • Chungte W. ChenMao-Jin Chern
    • Chungte W. ChenMao-Jin Chern
    • G02B27/02G02B5/18G02B17/08G02B27/00G02B27/01G02B27/10G02B27/42
    • G02B17/0852G02B17/08G02B27/0037G02B27/0101G02B27/4211G02B5/1876G02B2027/0118
    • A virtual image display optical system. The system includes an image source, a combiner, and a relay group. The relay group is a catatrioptic relay group that includes a reflective optical element, and a refractive lens group that includes at least one doublet and a diffractive lens. For some applications, the catatrioptric relay group may be replaced by a hybrid refractive-diffractive relay group, thus eliminating the reflective element. The diffractive optical element of the hybrid optical element is encoded on one side of a lens. The hybrid optical element forms a refractive/diffractive achromat to provide for primary chromatic aberration correction. The refractive lens group is also an achromat to provide for chromatic aberration correction. Power distribution between the hybrid optical element and the refractive lens group is such that secondary chromatic aberration of the refractive lens group is balanced out by the secondary chromatic aberration of the hybrid optical element. The diffractive optical element is designed using higher order wavefront correction terms encoded on one side to reduce spherochromatism and secondary spherochromatism of the relay group. One lens may have a conic or an aspherical surface to further reduce the spherochromatism and secondary spherochromatism. Asymmetrical aberration and distortion resulting from the combiner are compensated for by the reflective optical element. To minimize the residual aberration of the optical system, the reflective optical element is tilted and/or decentered. The system has a relatively wide spectral bandwidth, has good image quality, has simple optics, is ultracompact, and provides wide field coverage and large field overlaying.
    • 虚拟图像显示光学系统。 该系统包括图像源,组合器和中继组。 继电器组是包括反射光学元件的灾难性继电器组和包括至少一个双折射衍射透镜的折射透镜组。 对于一些应用,灾难性继电器组可以由混合折射衍射继电器组代替,从而消除反射元件。 混合光学元件的衍射光学元件被编码在透镜的一侧。 混合光学元件形成折射/衍射消色差以提供初级色差校正。 折射透镜组也是用于提供色像差校正的消色差。 混合光学元件和折射透镜组之间的功率分布使得折射透镜组的二次色差由混合光学元件的二次色差平衡。 衍射光学元件使用在一侧编码的较高阶波前校正项来设计,以减少中继组的球状染色和次级球状染色。 一个透镜可以具有锥形或非球面,以进一步减少球状染色和次级球状染色。 由组合器产生的不对称像差和失真由反射光学元件补偿。 为了最小化光学系统的残余像差,反射光学元件倾斜和/或偏心。 该系统具有相对较宽的光谱带宽,具有良好的图像质量,光学简单,超小型化,提供广泛的现场覆盖和大面积的覆盖。
    • 4. 发明授权
    • Virtual image display system with reduced ambient reflection and low
radiation
    • 具有减少环境反射和低辐射的虚像显示系统
    • US5585946A
    • 1996-12-17
    • US293641
    • 1994-08-19
    • Mao-Jin Chern
    • Mao-Jin Chern
    • H04N9/30G02F1/1335G02B27/14
    • H04N9/30
    • A virtual image display system with reduced ambient reflection. The virtual image display system includes a black and white image source for projecting a black and white image. The black and white image is then projected to a magnifying virtual image optical arrangement including a concave reflecting mirror. The magnifying virtual image optical arrangement and a color shutter including a linear polarizer receive the black and white image to generate a magnified color virtual image. The virtual color image display system further includes a .lambda./4-plate for cooperating with the color shutter including the linear polarizer to reduce an ambient reflection from the concave reflecting mirror.
    • 具有减少环境反射的虚拟图像显示系统。 虚拟图像显示系统包括用于投影黑白图像的黑白图像源。 然后将黑白图像投影到包括凹面反射镜的放大虚拟光学装置。 放大虚拟图像光学装置和包括线性偏振片的彩色快门接收黑白图像以产生放大的彩色虚像。 虚拟彩色图像显示系统还包括用于与包括线性偏振器的彩色快门协作的λ/ 4板,以减少来自凹面反射镜的环境反射。
    • 5. 发明授权
    • Virtual image display having a high efficiency grid beamsplitter
    • 具有高效电网分光器的虚像显示
    • US5383053A
    • 1995-01-17
    • US864864
    • 1992-04-07
    • Ronald G. HeggMao-Jin ChernAnson Au
    • Ronald G. HeggMao-Jin ChernAnson Au
    • G02B27/02G02B5/18G02B5/30G02B27/00G02B27/01G02B27/28H04N5/66
    • G02B27/0101G02B5/3058G02B2027/0118G02B5/30
    • A focusable virtual image display system employing a focusable image source such as a cathode ray tube and imaging optics to provide a virtual image. The virtual image is viewable by a user and its effective range may be changed without changing the apparent field of view or resolution. By placing the focus point of the imaging optics at the design eye, the image source is moved backwards and forwards, thus effectively changing the range of the virtual image observed by the user without changing the apparent field of view or resolution. The present invention allows the user to adjust the focus position of the virtual image of the image source by moving it relative to the imaging optics, while maintaining the size and resolution of the image. If the user wants to move the image further away, when the image source is moved, the imaging optics moves the virtual image further away and magnifies the image such that the angular field of view stays the same. The user cannot distinguish between the sizes, although the focus will be more comfortable for a particular accommodation range. The relative cost of the virtual image display system is relatively less expensive than large screen monitors due to the nature and complexity of the smaller components. By including a focus adjustment mechanism, the focusable virtual image display monitor has an added feature that a conventional large screen monitor does not provide.
    • 采用诸如阴极射线管和成像光学器件的可聚焦图像源的可对焦的虚像显示系统来提供虚像。 虚拟图像可由用户查看,并且可以改变其有效范围而不改变视野或分辨率。 通过将成像光学元件的焦点放置在设计眼睛处,图像源被向前和向后移动,从而有效地改变用户观察到的虚拟图像的范围而不改变视野或分辨率。 本发明允许用户通过相对于成像光学元件移动图像源的虚像来调节焦点位置,同时保持图像的尺寸和分辨率。 如果用户想要将图像移动得更远,当图像源被移动时,成像光学元件将虚拟图像进一步移动并放大图像,使得角度视场保持不变。 用户不能区分大小,尽管对于特定的住宿范围来说,焦点将更加舒适。 由于较小组件的性质和复杂性,虚拟图像显示系统的相对成本比大屏幕显示器相对较便宜。 通过包括焦点调整机构,可聚焦虚拟图像显示监视器具有常规大屏幕监视器不提供的附加功能。
    • 8. 发明授权
    • Focusable virtual image display
    • 可重复的虚拟图像显示
    • US5363241A
    • 1994-11-08
    • US864860
    • 1992-04-07
    • Ronald G. HeggMao-Jin Chern
    • Ronald G. HeggMao-Jin Chern
    • G02B7/04G02B1/00G02B25/00G02B27/02H04N13/00G02B15/14
    • H04N13/042G02B25/008G02B1/00
    • A focusable virtual image display system employing a focusable image source such as a cathode ray tube and imaging optics to provide a virtual image. The virtual image is viewable by a user and its effective range may be changed without changing the apparent field of view or resolution. By placing the focus point of the imaging optics at the design eye, the image source is moved backwards and forwards, thus effectively changing the range of the virtual image observed by the user without changing the apparent field of view or resolution. The present invention allows the user to adjust the focus position of the virtual image of the image source by moving it relative to the imaging optics, while maintaining the size and resolution of the image. If the user wants to move the image further away, when the image source is moved, the imaging optics moves the virtual image further away and magnifies the image such that the angular field of view stays the same. The user cannot distinguish between the sizes, although the focus will be more comfortable for a particular accommodation range. The relative cost of the virtual image display system is relatively less expensive than large screen monitors due to the nature and complexity of the smaller components. By including a focus adjustment mechanism, the focusable virtual image display monitor has an added feature that a conventional large screen monitor does not provide.
    • 采用诸如阴极射线管和成像光学器件的可聚焦图像源的可对焦的虚像显示系统来提供虚像。 虚拟图像可由用户查看,并且可以改变其有效范围而不改变视野或分辨率。 通过将成像光学元件的焦点放置在设计眼睛处,图像源被向前和向后移动,从而有效地改变用户观察到的虚拟图像的范围而不改变视野或分辨率。 本发明允许用户通过相对于成像光学元件移动图像源的虚像来调节焦点位置,同时保持图像的尺寸和分辨率。 如果用户想要将图像移动得更远,当图像源被移动时,成像光学元件将虚拟图像进一步移动并放大图像,使得角度视场保持不变。 用户不能区分大小,尽管对于特定的住宿范围来说,焦点将更加舒适。 由于较小组件的性质和复杂性,虚拟图像显示系统的相对成本比大屏幕显示器相对较便宜。 通过包括焦点调整机构,可聚焦虚拟图像显示监视器具有常规大屏幕监视器不提供的附加功能。
    • 9. 发明授权
    • Graded index asperhic combiners and display system utilizing same
    • 分级指数曲线组合器和利用它的显示系统
    • US4968117A
    • 1990-11-06
    • US210207
    • 1988-06-20
    • Mao-Jin ChernJohn J. FerrerRonald T. Smith
    • Mao-Jin ChernJohn J. FerrerRonald T. Smith
    • B01J12/02G01B5/00G02B1/10G02B5/18G02B5/28G02B5/32G02B27/00G02B27/01
    • B01J12/02G01B5/00G02B1/10G02B27/01G02B27/0103G02B27/017G02B27/0172G02B5/18G02B5/289G02B5/32G02B2027/0105G02B2027/0107G02B2027/0116G02B2027/0129G02B2027/0138G02B2027/0145G02B2027/0154G02B2027/0174G02B2027/0187G02B2027/0198G02B5/28
    • An improved optical combiner useful in many applications is disclosed. The combiner includes a substrate with at least one aspheric surface and an diffraction-type reflective coating formed on the substrate for selectively reflecting radiation within one or more predetermined narrow band ranges of wavelengths impinging on the coating. The aspericity of the surface may be selected to compensate or balance optical aberations. The coating is advantageously a graded-index coating, which eliminates the possible degradation of gelatin halogram coatings due to moisture. A process for applying the graded-index coating to a substrate is disclosed. The variation in the index profile of the coating can be selected to provide the capability of combiners with multiple color reflectivity responses, or which allow use of display light sources of wider spectral bandwidth, resulting in a brighter image and improved angular bandwidth. In another disclosed embodiment, the combiner is incorporated in a biocular helmet visor display resulting in improved optical performance and a simpler, lightweight structure. In another embodiment, the combiner is incorporated into a head-up display for an aircraft resulting in improved performance, lower weight, improved safety and greater look-up capability.
    • 公开了一种在许多应用中有用的改进的光学组合器。 组合器包括具有至少一个非球面的衬底和形成在衬底上的衍射型反射涂层,用于选择性地反射在一个或多个预定的窄带波长范围内的辐射照射在涂层上。 可以选择表面的平滑度以补偿或平衡光学像差。 涂层有利地是渐变折射率涂层,其消除了由于水分引起的明胶晕圈涂层的可能降解。 公开了将渐变折射率涂层应用于基底的方法。 可以选择涂层的折射率分布的变化以提供具有多种颜色反射率响应的组合器的能力,或者允许使用更宽光谱带宽的显示光源,导致更亮的图像和改进的角带宽。 在另一个公开的实施例中,组合器被并入到生物型头盔遮阳板显示器中,导致改进的光学性能和更简单,轻便的结构。 在另一个实施例中,组合器被结合到用于飞行器的平视显示器中,导致改进的性能,较低的重量,改进的安全性和更大的查找能力。