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    Photoelectric limit sensing assembly and system
    1.
    发明授权
    Photoelectric limit sensing assembly and system 失效
    光电极限感应组件和系统

    公开(公告)号：US3569720A

    公开(公告)日：1971-03-09

    申请号：US3569720D

    申请日：1969-01-06

    Applicant: ELECTROGLAS INC

    Inventor： FREDRIKSEN THORBJOERN ROLAND

    IPC: B23Q15/00 ,  G06M7/00

    CPC classification number: B23Q15/00

    Abstract: Photoelectric limit sensing assembly and system having photoelectric elements and logic arranged so that movement beyond a predetermined acceptable region is detected and which only permits movement in the proper direction to bring movement into the acceptable region.

    Closed loop stepping motor control system with seek reference capability
    3.
    发明授权
    Closed loop stepping motor control system with seek reference capability 失效
    具有SEEK参考能力的闭环循环电机控制系统

    公开(公告)号：US3628120A

    公开(公告)日：1971-12-14

    申请号：US3628120D

    申请日：1969-12-22

    Applicant: ELECTROGLAS INC

    Inventor： FREDRIKSEN THORBJOERN ROLAND

    IPC: G05B19/23 ,  G05B19/40

    CPC classification number: G05B19/232 ,  G05B2219/37183 ,  G05B2219/42213 ,  G05B2219/50031

    Abstract: A closed loop stepping motor control system provides seek reference position capability. A disc discriminator on the output shaft of the stepping motor includes a single aperture to indicate a unique step in a single revolution. A unique single revolution is indicated by the use of a mechanical slider mounted on a linearly moving carriage in conjunction with appropriate cutouts and photocells; alternatively a limit switch is used. Appropriate logic provides for stopping the stepping motor when the reference position has been reached.

    Laser scriber control system
    7.
    发明授权
    Laser scriber control system 失效
    激光控制系统

    公开(公告)号：US3814895A

    公开(公告)日：1974-06-04

    申请号：US21223471

    申请日：1971-12-27

    Applicant: ELECTROGLAS INC

    Inventor： FREDRIKSEN T

    IPC: B23K26/08 ,  B23K27/00

    CPC classification number: B23K26/0853

    Abstract: A laser scribe system is disclosed for aligning a wafer on which circuits are deposited, and for controlling the motion of a chuck, supporting the wafer, so that kerfs are cut in the wafer between all the circuits. The chuck is movable along X and Y axes in a XY plane by two indexable stepping motors, with a laser providing a beam in a direction perpendicular to the XY plane. The system is operable in an Align mode in which the chuck is movable back and forth in the X axis and the chuck is rotatable about an axis perpendicular to the XY plane until streets, representing wafer space between circuits, are aligned in the X axis. The system automatically sequences through several scribing phases during which the chuck is moved automatically in the X and Y axes at optimum speed to cut kerfs in all the streets of the wafer.

    Abstract translation: 公开了用于对准其上沉积有电路的晶片的激光划片系统，并且用于控制支撑晶片的卡盘的运动，使得在所有电路之间的晶片中切割切口。 卡盘可以通过两个可转位步进电机在XY平面中沿X和Y轴移动，激光器在垂直于XY平面的方向上提供光束。 系统可以在对准模式中操作，其中卡盘可以在X轴上来回移动，并且卡盘可以绕垂直于XY平面的轴线旋转，直到代表电路之间的晶片间隔的街道在X轴上对准。 该系统通过多个划线阶段自动序列，在此阶段卡盘以最佳速度在X和Y轴上自动移动，以切割晶片所有街道上的切口。

    Method and apparatus for measuring angular rotation of an object
    9.
    发明申请
    Method and apparatus for measuring angular rotation of an object 有权
    用于测量物体的角旋转的方法和装置

    公开(公告)号：US20020097904A1

    公开(公告)日：2002-07-25

    申请号：US10033159

    申请日：2001-10-26

    Applicant: ELECTROGLAS, INC.

    Inventor： Raymond G. White

    IPC: G06K009/00

    CPC classification number: G06K9/3275 ,  G06T7/74 ,  G06T2207/30148

    Abstract: A system is disclosed for determining the rotational orientation of an object. An image of the object is digitally captured. The digital image is filtered through an edge detection operation to enhance the edge information contained in the image. The filtered image is rotated through a series of incremental angles to produce a series of rotated images. Each rotated image is projected onto an x-axis and y-axis defined by pixel grid axes defined by the original image. The projection of the rotated images produces projected pixel counts formed by the summation of pixel value differences of the x-axis and y-axis on the projected image. For each rotated image, a score corresponding to the sum of the difference of gray-scale values for adjacent projected pixels is computed. The scores for the projections of each rotated image are plotted on a score-angle graph. A curve which includes the highest score and the neighboring next highest scores is interpolated to determine the peak score. The peak score corresponds to the scene angle of the object relative to the x-axis and y-axis defined by the original image.

    Abstract translation: 公开了一种用于确定物体的旋转取向的系统。 数字捕获对象的图像。 通过边缘检测操作对数字图像进行滤波，以增强包含在图像中的边缘信息。 滤波图像通过一系列增量角度旋转以产生一系列旋转图像。 每个旋转的图像投影到由原始图像定义的像素网格轴定义的x轴和y轴上。 旋转的图像的投影产生由投影图像上的x轴和y轴的像素值差的总和形成的投影像素计数。 对于每个旋转的图像，计算与相邻投影像素的灰度值的差的和相对应的分数。 每个旋转图像的投影的分数绘制在得分角度图上。 插入包括最高分数和相邻的下一个最高分数的曲线以确定峰值分数。 峰值分数对应于物体相对于由原始图像限定的x轴和y轴的场景角度。

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