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    • 36. 发明授权
    • Methods for manipulating light extraction from a light guide
    • 从光导处理光提取的方法
    • US07277609B2
    • 2007-10-02
    • US11267945
    • 2005-11-04
    • William J. Cassarly
    • William J. Cassarly
    • G02B6/42F21V7/04
    • G02B6/0061G02B6/0036G02B6/004G02B6/0043G02B6/0058G02B6/0065
    • In one embodiment, a method of defining an array of extractor elements configured to extract light from a light guide, and thereby produce a desired spatial light pattern ET quantifying optical output at a plurality of locations across the light guide is provided. The method comprises calculating a first spatial light pattern produced by a first array of extractor elements. The first spatial light pattern quantifies optical output at the plurality of locations across the light guide. The method further comprises determining a ratio R of the optical output of the desired spatial light pattern to an optical output of the first spatial light pattern. The method further comprises determining a modified ratio R′, wherein R′=Rα and |α|
    • 在一个实施例中,一种限定提取器元件的阵列的方法,所述提取器元件的阵列被配置为从光导中提取光,并且由此产生在光的多个位置上量化光输出的期望的空间光图案E 提供指导。 该方法包括计算由第一抽取器元件阵列产生的第一空间光图案。 第一空间光图案在光导的多个位置上量化光输出。 该方法还包括确定期望空间光图案的光输出与第一空间光图案的光输出的比R。 该方法还包括确定修饰比率R',其中R'= Rαα和|α| <1。 该方法还包括通过将提取器元件的第一阵列的特性缩放修改的比率R'来确定提取器元件的第二阵列的特性。
    • 37. 发明授权
    • System and method for broadcasting colored light for emergency signals
    • 为应急信号广播彩色光的系统和方法
    • US5691696A
    • 1997-11-25
    • US525833
    • 1995-09-08
    • Timothy J. MaziesJerry L. WilliamsWilliam J. Cassarly
    • Timothy J. MaziesJerry L. WilliamsWilliam J. Cassarly
    • B60Q1/26B60Q1/52
    • B60Q1/2611
    • A lighting system and method for broadcasting colored lights as emergency warning signals from a light source. A centralized continuous light source is coupled via a fiber optic transmission medium to an external display location such as a lens or the like located on a vehicle. The color and the relative intensity of each color is periodically modulated to alternate between at least two states such that the contrast between these alternating states is perceived by observers to be a flashing source of light with no off-time. The frequency and the duty cycle of the repetition rate of alternating between the states may be further controlled to better draw attention to the light source. In one embodiment, the external display locations include optical converters, each converter having multiple input facets and optically arranged to broadcast light received at its facets at predetermined vertical and horizontal output angles.
    • 一种用于将彩色光线作为来自光源的紧急警告信号的照明系统和方法。 集中的连续光源通过光纤传输介质耦合到诸如位于车辆上的透镜等的外部显示位置。 每种颜色的颜色和相对强度被周期调制以在至少两个状态之间交替,使得这些交替状态之间的对比度被观察者感知为没有关闭时间的闪光光源。 可以进一步控制状态之间交替的重复频率的频率和占空比,以更好地引起对光源的关注。 在一个实施例中,外部显示位置包括光学转换器,每个转换器具有多个输入面并且被光学地布置成以预定的垂直和水平输出角广播在其小面处接收的光。
    • 38. 发明授权
    • Low insertion loss optical beam steerer
    • 低插入损耗光束转向器
    • US5107357A
    • 1992-04-21
    • US643396
    • 1991-01-18
    • William J. CassarlyJohn C. Ehlert
    • William J. CassarlyJohn C. Ehlert
    • G02F1/29
    • G02F1/292
    • An optical beam scanner or spoiler includes an array of electrically controlled liquid crystal phase shifters. Each element of the phase shifter includes an active region where proper phase shift occurs, and also includes another region, generally near the edges of the element, in which light transmission does not occur or in which improper modulation results. The inefficient regions reduce the light transmission or modulation efficiency of the array. An aperture illuminator includes a Talbot plane phase plate (also known as a Fresnel image phase plate) interposed between the incident light beam and the liquid crystal array. The phase plate includes a transparent substrate with a binary pattern of regions of relatively higher and lower index of refraction in a repeating pattern with a period P. In a particular embodiment of the invention, the regions are physically raised and lowered portions of a surface. The phase plate generates an interference pattern of energy maxima and minima, and is located so the maxima fall on the active regions of the liquid crystal array, and the minima on the inactive portions. A second phase plate similar to the first (or a second pass through the first phase plate in a reflective system) reduces the magnitude of far-field grating lobes created by the first phase plate.
    • 光束扫描器或扰流板包括电控液晶移相器的阵列。 移相器的每个元件包括发生适当相移的有源区,并且还包括通常在元件的边缘附近的另一区域,其中不发生光透射,或者导致不适当的调制。 低效区域降低了阵列的光传输或调制效率。 孔径照明器包括介于入射光束和液晶阵列之间的Talbot平面相位板(也称为菲涅尔图像相位板)。 相位板包括具有相对较高和较低折射率的具有周期P的重复图案的具有相对较高和较低折射率的区域的二进制图案的透明基板。在本发明的特定实施例中,该区域是物理上升和降低表面的部分。 相位板产生能量最大值和最小值的干涉图案,并且位于最大值落在液晶阵列的有源区域上,并且在非活性部分上产生最小值。 类似于第一相(或反射系统中的第一相位板的第二通路)的第二相位板减小由第一相位板产生的远场光栅的大小。