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    • 1. 发明公开
    • Low dispersion interleaver
    • Verschachteler mit geringer色散
    • EP1235086A2
    • 2002-08-28
    • EP02251219.8
    • 2002-02-22
    • JDS Uniphase Inc.JDS Uniphase Corporation
    • Copner, NigelTan, Kim LeongAbraham, Christopher JohnDucellier, ThomasPicard, Marie Josee
    • G02B6/293
    • G02B6/12007G02B6/272G02B6/2766G02B6/2773G02B6/29302G02B6/29347G02B6/29349G02B6/29352G02B6/29358G02B6/29386
    • The present invention relates to an interferometer useful in the interleaving and deinterleaving of optical wavelength channels. Typically the invention comprises a beamsplitter and two resonators, e.g. GT etalons or ring resonators. The beamsplitter splits an input beam of light into a first sub-beam directed to follow a first path and a second sub-beam directed to follow a second path. The first resonator has a first effective cavity length and receives the first sub-beam. The second resonator has a second effective cavity length and receives the second sub-beam. The first path and the second path have an effective optical path difference approximately equal to one-half the first effective cavity length. In one embodiment, the front plates of the GT etalons each have a different reflectivity, and are selected to provide a desired spectral response. In another embodiment, the two resonators are slightly de-phased from one another such that the positive dispersion slope of the first resonator is aligned with the negative dispersion slope of the second resonator. Polarization-based versions of the invention are disclosed, in which a single resonator receives both sub-beams, which are orthogonally polarized. Single etalon versions of the invention are also possible, in which a beam is separated into sub-beams (i.e. reflected and transmitted beams) within a non-linear interferometer, and then re-combined outside the interferometer with the appropriate effective optical path length delay therebetween.
    • 本发明涉及可用于光波长信道的交织和解交织的干涉仪。 通常,本发明包括分束器和两个谐振器,例如。 GT标准具或环形谐振器。 分束器将输入光束分成指向跟随第一路径的第一子光束和指向跟随第二路径的第二子光束。 第一谐振器具有第一有效腔长并接收第一子光束。 第二谐振器具有第二有效腔长度并且接收第二子光束。 第一路径和第二路径具有大致等于第一有效腔长度的一半的有效光程差。 在一个实施例中,GT标准具的前板各自具有不同的反射率,并且被选择以提供期望的光谱响应。 在另一个实施例中,两个谐振器彼此稍微去相位,使得第一谐振器的正色散斜率与第二谐振器的负色散斜率对准。 公开了本发明的基于偏振的版本,其中单个谐振器接收正交极化的两个子光束。 本发明的单个标准具版本也是可能的,其中将光束分离成非线性干涉仪内的子光束(即反射和透射光束),然后在干涉仪外部以适当的有效光程长度延迟重新组合 其间。
    • 8. 发明公开
    • Twisted nematic xLCD contrast compensation with tilted-plate retarders
    • Verdrehter Nematischer xLCD-Kontrastausgleich mitschrägenPlatten-Retardern
    • EP1980902A2
    • 2008-10-15
    • EP08153826.6
    • 2008-03-31
    • JDS Uniphase Corporation
    • Tan, Kim LeongHendrix, Karen Denise
    • G02F1/13363H04N9/31
    • G02F1/133634G02F1/136277G02F2413/10H04N9/3105
    • Contrast compensation for a liquid crystal display projection system including a light source, a first polarizer, a liquid crystal display panel (404), and a second polarizer is provided using a tilted compensating plate. The compensating plate includes a first birefringent element (406) having an optic axis oriented at a first angle to the plate normal, where the first angle is greater than zero degrees (e.g., an A-plate or O-plate), and a second birefringent element (407) having an optic axis oriented at a second angle to the plate normal, where the second angle is substantially equal to zero degrees (e.g., a C-plate). The compensating plate is tilted (θ pt ) relative to a plane of the liquid crystal display panel. The tilted compensating plate has been shown to provide improved contrast compensation for twisted nematic liquid crystal displays.
    • 使用倾斜补偿板提供包括光源,第一偏振器,液晶显示面板(404)和第二偏振器的液晶显示投影系统的对比度补偿。 补偿板包括第一双折射元件(406),其具有以与板法线成第一角度定向的光轴,其中第一角度大于零度(例如,A板或O板),第二双折射元件 双折射元件(407)具有以与板法线成第二角度定向的光轴,其中第二角度基本上等于零度(例如,C板)。 补偿板相对于液晶显示面板的平面倾斜(¸​​pt)。 已经示出了倾斜补偿板对扭曲向列型液晶显示器提供改进的对比度补偿。