Automated personal vision tracker

    公开(公告)号:US11484195B2

    公开(公告)日:2022-11-01

    申请号:US16685017

    申请日:2019-11-15

    摘要: Disclosed embodiments may include a device, system and method for providing a low cost device that can measure refractive errors very accurately via attachment to a smart phone. A disclosed device may use ambient light or a light source in simulating the cross cylinder procedure that optometrists use by utilizing the inverse Shack-Hartman technique. Using an optical device, in conjunction with a smart phone, the user first changes the angle of the axis until he/she sees a cross pattern (the vertical and horizontal lines are equally spaced). The user adjusts the display, using motorized controls on the on the optical device, to make the lines come together and overlap, which corresponds to bringing the view into sharp focus, thus determining the appropriate optical prescription for the user.

    Automated Personal Vision Tracker
    3.
    发明申请

    公开(公告)号:US20200077886A1

    公开(公告)日:2020-03-12

    申请号:US16685017

    申请日:2019-11-15

    摘要: Disclosed embodiments may include a device, system and method for providing a low cost device that can measure refractive errors very accurately via attachment to a smart phone. A disclosed device may use ambient light or a light source in simulating the cross cylinder procedure that optometrists use by utilizing the inverse Shack-Hartman technique. Using an optical device, in conjunction with a smart phone, the user first changes the angle of the axis until he/she sees a cross pattern (the vertical and horizontal lines are equally spaced). The user adjusts the display, using motorized controls on the on the optical device, to make the lines come together and overlap, which corresponds to bringing the view into sharp focus, thus determining the appropriate optical prescription for the user.

    Methods and apparatus for broadcasting regional information over a satellite communication system
    4.
    发明授权
    Methods and apparatus for broadcasting regional information over a satellite communication system 有权
    通过卫星通信系统广播区域信息的方法和装置

    公开(公告)号:US06594469B1

    公开(公告)日:2003-07-15

    申请号:US09650513

    申请日:2000-08-29

    IPC分类号: H04Q720

    摘要: In a communication satellite constellation which uses CDMA and multiple spot beams for point-to-point communication, a system is provided for broadcasting regionally related information within a spot beam by establishing a Frequency/Walsh Code Tiling over the Earth's surface, and enabling a user terminal at a given position to tune to an appropriate frequency and Walsh Code to receive the information broadcast from a satellite over a forward beam downlink. The information, e.g. regional messages such as local weather or traffic, is transmitted to the satellite from a ground station or gateway that receives the information from a Broadcast Processing Center. In a preferred embodiment a dedicated Frequency Division Multiplex (FDM) channel within each spot beam transmits the regional broadcast messages at the Tiles in accordance with the Walsh Code designations of the Tiles.

    摘要翻译: 在使用CDMA和多点波束进行点对点通信的通信卫星星座中,通过在地球表面上建立频率/沃尔什码平铺来提供用于在点波束内广播区域相关信息的系统,并使用户 终端在给定位置调谐到适当的频率,沃尔什码接收从前向波束下行链路上的卫星广播的信息。 信息,例如 诸如本地天气或交通的区域性信息从从广播处理中心接收信息的地面站或网关发送到卫星。 在优选实施例中,每个点波束内的专用频分复用(FDM)信道根据瓦斯的沃尔什码指令在瓦片处发送区域广播消息。