Input device using laser self-mixing velocimeter
    1.
    发明授权
    Input device using laser self-mixing velocimeter 有权
    输入装置采用激光自混式速度计

    公开(公告)号:US07557795B2

    公开(公告)日:2009-07-07

    申请号:US11170182

    申请日:2005-06-30

    IPC分类号: G09G5/00

    摘要: An input device encodes motion using a laser self-mixing velocimeter. The laser beam is directed at a disk or other moving member. As light from that beam is reflected back into the emitting cavity of the laser, the beam power output fluctuates because of the self-mixing effect and generates a beat signal. The beat signal frequency is used to determine the speed of the member's motion. The direction of motion is also determined based on the beat signal. A difference frequency analog phase locked loop filters the beat signal. A zero-point control disables motion detection when the average beat signal amplitude falls below a threshold. A triangle modulator generates a triangle wave for the laser bias current, with the triangle wave frequency being a submultiple of the beat signal frequency.

    摘要翻译: 输入设备使用激光自混式速度计对运动进行编码。 激光束被引导到盘或其他移动构件。 当来自该光束的光被反射回到激光器的发射腔中时,光束功率输出由于自混合效应而波动并产生拍频信号。 拍频信号用于确定会员运动的速度。 也可以基于拍子信号来确定运动方向。 差频模拟锁相环对拍频信号进行滤波。 零点控制在平均差拍信号幅度低于阈值时禁止运动检测。 三角形调制器产生激光偏置电流的三角波,三角波频率是拍频信号频率的一个倍数。

    Method and system for optical tracking of a pointing object
    2.
    发明授权
    Method and system for optical tracking of a pointing object 有权
    指向物体光学跟踪的方法和系统

    公开(公告)号:US07534988B2

    公开(公告)日:2009-05-19

    申请号:US11268937

    申请日:2005-11-08

    IPC分类号: G06F3/033

    CPC分类号: G06F3/0421

    摘要: Optical tracking systems, method, and devices are described in which optical components detect light within a substantially planar region adjacent to a user device. Tracking logic may receive signals output by the optical components and determine coordinates associated with a movement of a pointing object through the substantially planar region. The tracking logic may then provide for translation of the coordinates into an action on a display, such as, for example, a movement of a cursor or other icon on the display.

    摘要翻译: 光学跟踪系统,方法和装置被描述,其中光学部件检测与用户装置相邻的基本平坦的区域内的光。 跟踪逻辑可以接收由光学部件输出的信号,并且确定与通过基本平坦的区域的指向物体的运动相关联的坐标。 然后,跟踪逻辑可以提供将坐标转换为显示器上的动作,例如光标或其他图标在显示器上的移动。

    Optical tracker
    4.
    发明申请
    Optical tracker 有权
    光学跟踪器

    公开(公告)号:US20070103440A1

    公开(公告)日:2007-05-10

    申请号:US11268937

    申请日:2005-11-08

    IPC分类号: G09G5/08

    CPC分类号: G06F3/0421

    摘要: Optical tracking systems, method, and devices are described in which optical components detect light within a substantially planar region adjacent to a user device. Tracking logic may receive signals output by the optical components and determine coordinates associated with a movement of a pointing object through the substantially planar region. The tracking logic may then provide for translation of the coordinates into an action on a display, such as, for example, a movement of a cursor or other icon on the display.

    摘要翻译: 光学跟踪系统,方法和装置被描述,其中光学部件检测与用户装置相邻的基本平坦的区域内的光。 跟踪逻辑可以接收由光学部件输出的信号,并且确定与通过基本平坦的区域的指向物体的运动相关联的坐标。 然后,跟踪逻辑可以提供将坐标转换为显示器上的动作,例如光标或其他图标在显示器上的移动。

    PHOTON PHASE MODULATING SYSTEM
    6.
    发明申请
    PHOTON PHASE MODULATING SYSTEM 有权
    光电相位调制系统

    公开(公告)号:US20140205302A1

    公开(公告)日:2014-07-24

    申请号:US13985565

    申请日:2013-03-08

    IPC分类号: H04B10/556

    摘要: The present invention utilizes a high-speed serial data transceiver to generate two high-speed electric pulse signals. After passing through a gain network, the signals are used for driving an electro-optic phase modulator (PM) so as to realize phase modulation of photon signals. The present invention may directly use a high-speed digital signal to realize a four-phase modulation function needed by the BB84 quantum key distribution protocol without using a digital to analog converter or an analog switch. This can prevent modulation rate from being restricted by links including digital-to-analogue conversion, switching of the analogue and the like. A dual-electrode electro-optic phase modulator scheme can also effectively reduce requirements for amplitude of a modulation driving signal, thus facilitating realization of high-speed phase modulation, which meets requirements of quantum key distribution.

    摘要翻译: 本发明利用高速串行数据收发器来产生两个高速电脉冲信号。 通过增益网络后,信号用于驱动电光相位调制器(PM),以实现光信号的相位调制。 本发明可以直接使用高速数字信号来实现BB84量子密钥分发协议所需的四相调制功能,而不使用数模转换器或模拟开关。 这可以防止调制速率被包括数模转换,模拟转换等的链路所限制。 双电极电光相位调制器方案还可以有效降低对调制驱动信号幅度的要求,从而有助于实现高速相位调制,满足量子密钥分配的要求。