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    Optical interferometer with multiple heads
    3.
    发明授权
    Optical interferometer with multiple heads 失效
    具有多个头的光学干涉仪

    公开(公告)号：US5933234A

    公开(公告)日：1999-08-03

    申请号：US132244

    申请日：1998-08-11

    申请人： Philip Lam

    发明人： Philip Lam

    IPC分类号： G01B9/02 ,  G01J3/42

    CPC分类号： G01J3/42 ,  G01B9/02028 ,  G01B9/0205

    摘要： A multiple optical head interferometer comprises one Light Source-Detection-Computing unit and multiple optical heads. The diameters of all of the optical heads are of equal size, and oriented in the same direction. Shutters or adjustable mirrors are provided such that the Light Source-Detection-Computing unit is used with only one optical head at a time. The multiple optical head interferometer of the present invention may measure many workpieces quickly in a short time, as while one workpiece is being measured, others may be setup for measurement or removed for further processing. In a first embodiment, the branching device for branching the laser beam comprises a plurality of beam splitters. Shutters are used to control which optical head is to be used with the Light Source-Detection-Computing unit at a particular time. In the second and preferred embodiment of the present invention, branching out of the optical heads is achieved by using adjustable mirrors and reflection. Branching out by means of reflection has the advantage of conserving light energy and has less unwanted optical noise. The position of the adjustable mirror is determined to control which optical head is to be used with the Light Source-Detection-Computing unit for a particular time.

    摘要翻译： 多光头干涉仪包括一个光源检测计算单元和多个光头。 所有光学头的直径相同的尺寸，并且在相同的方向上取向。 提供百叶窗或可调镜，使得光源检测计算单元一次仅使用一个光学头。 本发明的多光头干涉仪可以在短时间内快速地测量许多工件，因为在测量一个工件时，可以设置其它工件用于测量或移除用于进一步处理。 在第一实施例中，用于分支激光束的分支装置包括多个分束器。 在特定时间使用百叶窗来控制光源检测计算单元使用哪个光头。 在本发明的第二和最佳实施例中，通过使用可调镜和反射来实现光头的分支。 通过反射分支具有节省光能并具有较少不需要的光噪声的优点。 确定可调镜的位置，以控制在特定时间内与光源检测计算单元一起使用哪个光头。

    POWERED WHEELCHAIR HAVING A SIDE-ACCESS BATTERY COMPARTMENT
    4.
    发明申请
    POWERED WHEELCHAIR HAVING A SIDE-ACCESS BATTERY COMPARTMENT 有权
    动力轮椅有一个侧面电池舱

    公开(公告)号：US20070181353A1

    公开(公告)日：2007-08-09

    申请号：US11550147

    申请日：2006-10-17

    申请人： John Puskar-Pasewicz ,  Kip Alder ,  Philip Lam

    发明人： John Puskar-Pasewicz ,  Kip Alder ,  Philip Lam

    IPC分类号： B60K1/00

    CPC分类号： A61G5/042 ,  A61G5/06 ,  Y10S180/907

    摘要： A wheelchair includes a frame, a chair, a pair of drive wheels, a pair of rear wheels, and a pair of from wheels. Each front wheel is part of a front arm assembly that is rigidly coupled to a drive via a mounting plate. The mounting plate is connected to the wheelchair frame by a pivot. The drives are transversely mounted. The batteries are disposed rearward of the drives. The wheelchair seat can be moved forward to provide access to the batteries without fully removing the wheelchair from the frame. Or the wheelchair may provide side access to the batteries and the wheelchair may be fixed.

    摘要翻译： 轮椅包括框架，椅子，一对驱动轮，一对后轮和一对轮子。 每个前轮是前臂组件的一部分，其通过安装板刚性地联接到驱动器。 安装板通过枢轴连接到轮椅架上。 驱动器横向安装。 电池设置在驱动器的后方。 轮椅座椅可以向前移动，以便无需将轮椅从车架上完全卸下即可进入电池。 或者轮椅可以提供侧面访问电池，并且轮椅可以被固定。

    Method for fabricating gradient-index rods and rod arrays
    5.
    发明授权
    Method for fabricating gradient-index rods and rod arrays 失效

    公开(公告)号：US06598429B1

    公开(公告)日：2003-07-29

    申请号：US09716570

    申请日：2000-11-17

    申请人： Shibin Jiang ,  Philip Lam

    发明人： Shibin Jiang ,  Philip Lam

    IPC分类号： C03B23057

    CPC分类号： G02B6/0281 ,  C03B23/047 ,  C03B23/207 ,  C03B25/02

    摘要： A method for fabricating gradient-index rods and rod arrays. A central rod of optical glass having predetermined properties and predetermined outside dimensions is placed inside a tube of optical glass having predetermined properties and predetermined outside dimensions, to form an assembly. The inside dimensions of the tube are substantially equal to the outside dimensions of the rod. The tube is formed of a plurality of coaxial sleeves, the outside dimensions of each interior sleeve being substantially equal to the inside dimensions of the next adjacent sleeve, each sleeve having a selected refractive index so that, together with the tube, the refractive indices from the central rod through the outermost sleeve approximate the refractive index profile of the gradient-index rod to be fabricated. The central rod and sleeve material is selected so that their respective thermal indices of expansion are substantially equal. The central rod and tube assembly is placed in a mold having inside dimensions substantially equal to the outside dimensions of the tube. The mold is oriented vertically so as to ensure that there is no net lateral gravitational force on the assembly. The mold is then heated with the central rod and the tube therein at a predetermined temperature for a predetermined time so as to cause a selected amount of diffusion of material between the central rod and the sleeves and thereby produce a radial refractive index gradient. The temperature is then gradually reduced to anneal the glass. The cooled glass comprises a preform which is then drawn into a gradient-index rod. Gradient-index elements fabricated in accordance with the invention may be placed into a substrate and drawn into elements that have a desired external shape while retaining the optical properties of a radially symmetric, cylindrical gradient-index rod. Arrays of gradient-index rods fabricated using the invention may also be bonded together or imbedded in a substrate.