Equalization of optical signals
    1.
    发明授权
    Equalization of optical signals 有权
    光信号均衡

    公开(公告)号:US07272324B2

    公开(公告)日:2007-09-18

    申请号:US10007531

    申请日:2001-10-26

    IPC分类号: H04B10/00

    CPC分类号: H04B10/2507

    摘要: Methods for performing time-domain equalization of an information signal represented by an optical signal are provided. A representative method includes: receiving the optical signal; optically splitting the optical signal into beams; optically delaying at least one of the beams; detecting a plurality of the beams to generate respective electrical signal components; and combining a plurality of the electrical signal components to generate an electrical output signal representing the information signal. Systems and other methods also are provided.

    摘要翻译: 提供了用于执行由光信号表示的信息信号的时域均衡的方法。 一种代表性的方法包括:接收光信号; 将光信号光学分解成光束; 光学地延迟至少一个光束; 检测多个波束以产生相应的电信号分量; 以及组合多个所述电信号分量以产生表示所述信息信号的电输出信号。 还提供了系统和其它方法。

    COOLANT PASSAGE INSPECTION DEVICE AND METHOD OF VEHICLE CYLINDER HEAD COOLANT PASSAGE BLOCKAGE DETECTION
    2.
    发明申请
    COOLANT PASSAGE INSPECTION DEVICE AND METHOD OF VEHICLE CYLINDER HEAD COOLANT PASSAGE BLOCKAGE DETECTION 有权
    冷却液通气检查装置及车辆气缸盖冷却液通气堵塞检测方法

    公开(公告)号:US20080239303A1

    公开(公告)日:2008-10-02

    申请号:US11694045

    申请日:2007-03-30

    IPC分类号: G01N21/00

    CPC分类号: G01N21/954 G01N2021/9544

    摘要: A vehicle cylinder head coolant passage inspection device and a method for inspecting vehicle cylinder head coolant passages therewith. A device and method of the present invention can be used to detect blockages present within such coolant passages. A device and method of the present invention uses one or more fiber-optic probes that can both emit and receive light. The probe(s) are used with a sensor that can register light reflected by a blockage and received by a probe(s) while in a coolant passage. Reflected light readings registered by the sensor can be used to determine whether a blockage is present.

    摘要翻译: 一种车辆气缸盖冷却剂通道检查装置和用于检查车辆气缸盖冷却剂通道的方法。 本发明的装置和方法可用于检测在这种冷却剂通道内存在的堵塞物。 本发明的装置和方法使用能够发射和接收光的一个或多个光纤探针。 探头与传感器一起使用,传感器可以在冷却剂通道中记录由阻塞反射并由探头接收的光。 可以使用由传感器登记的反射光读数来确定是否存在堵塞。

    Wavelength selective switching device and method for selectively transmitting optical signals based on wavelength
    3.
    发明申请
    Wavelength selective switching device and method for selectively transmitting optical signals based on wavelength 失效
    波长选择性开关器件及其方法,用于选择性地传输基于波长的光信号

    公开(公告)号:US20050073749A1

    公开(公告)日:2005-04-07

    申请号:US10680647

    申请日:2003-10-07

    IPC分类号: G02F1/01 H04Q11/00 G02B5/30

    摘要: A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different wavelengths such that the optical signal of a selected wavelength can be selectively transmitted. The wavelength selective switching device selectively rotates the polarization components of the optical signals such that the polarization states of the polarization components are the same in both incoming and outgoing directions at the diffraction grating. Thus, a diffraction grating with a high grating line frequency (e.g. greater than 900 grating lines per mm for signals in the 1550 nm wavelength range) can be used for diffracting the polarization components of the optical signals in both the incoming and outgoing directions.

    摘要翻译: 用于基于波长选择性地发射光信号的波长选择性开关装置和方法利用衍射来空间分离不同波长的光信号,使得可以选择性地发射所选波长的光信号。 波长选择开关器件选择性地旋转光信号的偏振分量,使得偏振分量的偏振状态在衍射光栅的入射方向和出射方向都相同。 因此,可以使用具有高光栅线频率(例如,对于1550nm波长范围内的信号来说,每毫米大于900个光栅线数)的衍射光栅来衍射光信号在入射和出射方向上的偏振分量。

    Method and apparatus to enhance contrast in electro-optical display devices
    5.
    发明申请
    Method and apparatus to enhance contrast in electro-optical display devices 有权
    提高电光显示装置对比度的方法和装置

    公开(公告)号:US20050168430A1

    公开(公告)日:2005-08-04

    申请号:US10771738

    申请日:2004-02-04

    IPC分类号: G09G3/36

    摘要: Display contrast in electro-optical display devices is improved using a drive circuit including pixel drive circuits and a common drive circuit. The pixel drive circuits are connected to pixel electrodes of the display device, and are operable to generate respective pixel drive signals that alternate between a first high voltage and a first low voltage differing in voltage by less than or equal to a process-limited maximum. The common drive circuit is connected to a common electrode of the display device, and is operable to generate a common drive signal alternating between a second high voltage and a second low voltage differing in voltage by more than the process-limited maximum. The common drive signal is asymmetrically bipolar with respect to the first low voltage of the pixel drive signal.

    摘要翻译: 使用包括像素驱动电路和公共驱动电路的驱动电路来改善电光显示装置中的显示对比度。 像素驱动电路连接到显示装置的像素电极,并且可操作以产生在不同于处理限制最大值的电压不同的第一高电压和第一低电压之间交替的各个像素驱动信号。 公共驱动电路连接到显示装置的公共电极,并且可操作以产生在不同于处理限制最大值的电压不同的第二高电压和第二低电压之间交替的公共驱动信号。 公共驱动信号相对于像素驱动信号的第一低电压是非对称的。

    Methods and systems for measuring speckle translation with spatial filters
    7.
    发明申请
    Methods and systems for measuring speckle translation with spatial filters 有权
    用空间滤波器测量散斑的方法和系统

    公开(公告)号:US20060132442A1

    公开(公告)日:2006-06-22

    申请号:US11016651

    申请日:2004-12-17

    IPC分类号: G09G5/08

    摘要: Two or more spatial filters are used in determining velocity based on speckle translation. A light source may be turned on, turned off, or both for a variable amount of time during operation. The velocity may then be determined with trend identification, correlation, recursive frequency estimation, or measurement bandwidth variation. A confidence level may also be calculated for the measured velocity, and the measured velocity reported or used only when the calculated confidence level meets or exceeds a given value.

    摘要翻译: 使用两个或更多个空间滤波器来确定基于斑点平移的速度。 在操作期间,光源可以被打开,关闭或两者都变化了一段时间。 然后可以用趋势识别,相关性,递归频率估计或测量带宽变化来确定速度。 也可以计算测量速度的置信水平,仅在计算的置信度达到或超过给定值时报告或使用的测量速度。

    Method of enhancing wavelength tuning performance in an external cavity laser
    8.
    发明申请
    Method of enhancing wavelength tuning performance in an external cavity laser 失效
    增强外腔激光器波长调谐性能的方法

    公开(公告)号:US20050047473A1

    公开(公告)日:2005-03-03

    申请号:US10651747

    申请日:2003-08-29

    IPC分类号: H01S3/08 H01S5/00 H01S5/14

    摘要: A method of enhancing wavelength tuning performance in an external cavity laser includes providing a diffractive focusing element, emitting light into the cavity of the laser at a range of angles relative to an optical axis of the cavity, and diffractively focusing the light back onto the optical axis at a wavelength-dependent focal distance using the diffractive focusing element. The method further includes confining the diffractive focusing to a high dispersivity portion of the diffractive focusing element. In various embodiments, the confining may include offsetting the diffractive focusing element radially relative to the optical axis, or selectively blocking a portion of the light emitted into the cavity at emission angles less than a threshold emission angle.

    摘要翻译: 一种增强外腔激光器中的波长调谐性能的方法包括:提供衍射聚焦元件,以相对于空腔的光轴的角度范围将光发射到激光器的腔中,并将光衍射地聚焦到光学 使用衍射聚焦元件以波长相关的焦距。 该方法还包括将衍射聚焦限制在衍射聚焦元件的高分散性部分。 在各种实施例中,约束可以包括使衍射聚焦元件相对于光轴径向偏移,或者以小于阈值发射角的发射角度选择性地阻挡发射到腔中的光的一部分。

    Polarization control device
    9.
    发明授权
    Polarization control device 失效
    极化控制装置

    公开(公告)号:US06686984B1

    公开(公告)日:2004-02-03

    申请号:US09502362

    申请日:2000-02-29

    IPC分类号: G02F11337

    摘要: A polarization control device, comprising: a liquid crystal device containing a liquid crystal material with an optical anisostropy with substantially homeotropically aligned molecules when in a neutral electrical field state; a plurality of electrodes for applying an electrical field to change an orientation of the molecules of the liquid crystal material from their alignment in the neutral electrical filed state; a circuit for applying a voltage to the electrodes; and an optical system for directing light through the liquid crystal material.

    摘要翻译: 一种偏振控制装置,包括:液晶装置,当处于中性电场状态时,所述液晶装置含有具有大致垂直排列的分子的具有光学不对称的液晶材料; 多个电极,用于施加电场以改变液晶材料的分子在中性电场状态下的取向; 用于向电极施加电压的电路; 以及用于引导光通过液晶材料的光学系统。

    Coolant passage inspection device and method of vehicle cylinder head coolant passage blockage detection
    10.
    发明授权
    Coolant passage inspection device and method of vehicle cylinder head coolant passage blockage detection 有权
    冷却液通道检测装置及车缸盖冷却液通道堵塞检测方法

    公开(公告)号:US07602486B2

    公开(公告)日:2009-10-13

    申请号:US11694045

    申请日:2007-03-30

    IPC分类号: G01N21/00

    CPC分类号: G01N21/954 G01N2021/9544

    摘要: A vehicle cylinder head coolant passage inspection device and a method for inspecting vehicle cylinder head coolant passages therewith. A device and method of the present invention can be used to detect blockages present within such coolant passages. A device and method of the present invention uses one or more fiber-optic probes that can both emit and receive light. The probe(s) are used with a sensor that can register light reflected by a blockage and received by a probe(s) while in a coolant passage. Reflected light readings registered by the sensor can be used to determine whether a blockage is present.

    摘要翻译: 一种车辆气缸盖冷却剂通道检查装置和用于检查车辆气缸盖冷却剂通道的方法。 本发明的装置和方法可用于检测在这种冷却剂通道内存在的堵塞物。 本发明的装置和方法使用能够发射和接收光的一个或多个光纤探针。 探头与传感器一起使用,传感器可以在冷却剂通道中记录由阻塞反射并由探头接收的光。 可以使用由传感器登记的反射光读数来确定是否存在堵塞。