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    Extended Depth-of-Field Lenses and Methods For Their Design, Optimization and Manufacturing
    103.
    发明申请
    Extended Depth-of-Field Lenses and Methods For Their Design, Optimization and Manufacturing 有权
    扩展深度透镜及其设计，优化和制造方法

    公开(公告)号：US20100002310A1

    公开(公告)日：2010-01-07

    申请号：US12167741

    申请日：2008-07-03

    Applicant: Nicholas George ,  Xi Chen

    Inventor： Nicholas George ,  Xi Chen

    IPC: G02B13/18 ,  B29D11/00 ,  G06F17/10

    CPC classification number: G02B27/0012 ,  G02B9/34 ,  G02B13/18 ,  G02B27/0075

    Abstract: For rotationally symmetric aspheric lenses, one can establish lens design and layout based upon the phase delay function exp[−iφ(ρ)]. An embodiment of the invention is a method for calculating a corresponding variation in focal length denoted by f(ρ). According to an aspect, one can also assert a shape for the focal length f(ρ) and thereafter calculate a phase delay function in order to synthesize a novel lens. New EDoF lens designs are obtained by selection of an inner and outer focal length connected by a simple curve that can be approximate by a polynomial. From the selected f(ρ), one can synthesize a finished EDoF lens design and fabricate the lens. Another aspect of this invention is directed to a method to tailor prior-art EDoF lenses so that their performance over some range is improved.

    Abstract translation: 对于旋转对称非球面透镜，可以基于相位延迟函数exp [-iphi（rho）]建立透镜设计和布局。 本发明的实施例是用于计算由f（rho）表示的焦距的相应变化的方法。 根据一个方面，还可以为焦距f（rho）确定一个形状，然后计算相位延迟函数，以便合成一个新颖的透镜。 通过选择通过可以通过多项式近似的简单曲线连接的内焦距和外焦距来获得新的EDoF透镜设计。 从选定的f（rho）中，可以合成完成的EDoF透镜设计并制作镜头。 本发明的另一方面涉及一种定制现有技术的EDoF透镜的方法，使得它们在一些范围上的性能得到改善。

    Methods and circuits for optimal equalization
    106.
    发明授权
    Methods and circuits for optimal equalization 有权
    最优均衡的方法和电路

    公开(公告)号：US07376179B2

    公开(公告)日：2008-05-20

    申请号：US10383571

    申请日：2003-03-10

    Applicant: Xi Chen ,  Bao Lenguyen ,  Wen-Chung (Stewart) Wu

    Inventor： Xi Chen ,  Bao Lenguyen ,  Wen-Chung (Stewart) Wu

    IPC: H03H7/30

    CPC classification number: H04L25/03885

    Abstract: Methods and circuits utilizing a two stage adaptation algorithm to determine the optimal code for an equalizer to compensate a received signal is disclosed. In the first stage, a coarse tuning algorithm is used to choose a range of codes based on the amplitude of the received signal. The chosen codes will be used as reference points in the second stage. In the second stage, a fine tuning algorithm is used to select a code in the range of reference codes determined in stage one. The fine tuning algorithm looks to the status of the data lock signal generated by the clock recovery circuit. If the data lock signal does not indicate a lock, the fine tuning algorithm cycles through the range of reference codes. If the data lock signal indicates a lock, then that particular code is continued to be used for the equalizer.

    Abstract translation: 公开了利用两阶段自适应算法来确定用于补偿接收信号的均衡器的最佳代码的方法和电路。 在第一阶段中，使用粗调算法来基于接收信号的幅度来选择一个范围的代码。 所选代码将用作第二阶段的参考点。 在第二阶段中，使用微调算法来选择在第一阶段中确定的参考码范围内的代码。 微调算法查看由时钟恢复电路产生的数据锁定信号的状态。 如果数据锁定信号未指示锁定，则微调算法将循环参考码范围。 如果数据锁定信号指示锁定，则该特定代码继续用于均衡器。

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