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    • 3. 发明授权
    • Method and apparatus for absolute Moire distance measurements using a
grating printed on or attached to a surface
    • 使用印刷在表面上或附着于表面的光栅进行绝对莫尔距离测量的方法和装置
    • US5075562A
    • 1991-12-24
    • US584983
    • 1990-09-20
    • John E. Greivenkamp, Jr.Russell J. PalumKevin G. Sullivan
    • John E. Greivenkamp, Jr.Russell J. PalumKevin G. Sullivan
    • G01B11/00G01B11/02G01D5/26G01D5/38G01S17/89G02B7/28
    • G01B11/026G01D5/38G01S17/89G02B7/28
    • Method and apparatus are disclosed for providing absolute Moire distance measurements of a diffusely reflective surface from a reference position. More particularly, a first grating is located, formed, or printed on the diffusely reflective surface. An image of the first grating is formed on a second grating or detector array by imaging means for generating a Moire pattern that is detected by a detector means. At the reference position of the diffusely reflective surface relative to the imaging means, the periods of the image of the first grating and the second grating match. Movement of the diffusely reflective surface from the reference position in a direction normal thereto, produces a spatially varying intensity pattern at the detector means which results from the shifting and magnification mismatch between the pattern of the image of the first grating and the pattern of the second grating. Measuring the amount of magnification differences between the two patterns provides information related to the instantaneous absolute distance of the diffusely reflective surface from the reference position. Various methods are disclosed for using the information from the detector means for determining the absolute distance measurements.
    • 公开了用于从参考位置提供漫反射表面的绝对莫尔距离测量的方法和装置。 更具体地,第一光栅被定位,形成或印刷在漫反射表面上。 第一光栅的图像通过成像装置形成在第二光栅或检测器阵列上,用于产生由检测器装置检测的莫尔图案。 在漫反射表面相对于成像装置的参考位置处,第一光栅和第二光栅的图像的周期匹配。 漫反射表面在与基准位置垂直的方向上的移动在检测器装置处产生空间变化的强度图案,其由第一光栅的图像的图案与第二光栅的图案之间的偏移和放大失配产生 光栅。 测量两个图案之间的放大率差异量提供了与漫反射表面从参考位置的瞬时绝对距离相关的信息。 公开了使用来自检测器装置的用于确定绝对距离测量的信息的各种方法。