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    • 2. 发明授权
    • Method and device for measuring motion error of linear stage
    • 用于测量线性阶段运动误差的方法和装置
    • US08687200B2
    • 2014-04-01
    • US13479933
    • 2012-05-24
    • Sun-Kyu LeeChaBum LeeGyu Ha Kim
    • Sun-Kyu LeeChaBum LeeGyu Ha Kim
    • G01B9/02G01N21/86G01V8/00G01D5/36
    • G01B9/02081G01B9/02027G01B2290/30G01B2290/45G01B2290/70
    • Measurement of motion errors of a linear stage is performed to enable accurate measurement of motion errors in linear directions and a rotational direction in the linear stage using a diffraction grating. A first beam splitter splits a laser beam emitted from a light emitting unit. A first measurement unit measures a unidirectional linear motion error of the linear stage using one laser beam component split by the first beam splitter and a second measurement unit measures an angular motion error and another unidirectional linear motion of the linear stage error using a diffracted beam component obtained by diffracting another laser beam component split by the first beam splitter through the diffraction grating. A third measurement unit circularly polarizes the beam component diffracted through the diffraction grating to measure a third unidirectional linear motion error of the linear stage.
    • 执行线性级的运动误差的测量以使得能够使用衍射光栅精确地测量线性方向上的运动误差和线性级中的旋转方向。 第一分束器分离从发光单元发射的激光束。 第一测量单元使用由第一分束器分裂的一个激光束分量来测量线性平台的单向线性运动误差,第二测量单元使用衍射光束分量来测量角运动误差和线性级误差的另一单向线性运动 通过衍射由第一分束器分裂的另一激光束分量衍射光栅获得。 第三测量单元使通过衍射光栅衍射的束分量圆偏振,以测量线性级的第三单向线性运动误差。
    • 3. 发明申请
    • METHOD AND DEVICE FOR MEASURING MOTION ERROR OF LINEAR STAGE
    • 用于测量线性运动误差的方法和装置
    • US20120314220A1
    • 2012-12-13
    • US13479933
    • 2012-05-24
    • Sun-Kyu LEEChaBum LeeGyu Ha Kim
    • Sun-Kyu LEEChaBum LeeGyu Ha Kim
    • G01B9/02
    • G01B9/02081G01B9/02027G01B2290/30G01B2290/45G01B2290/70
    • Measurement of motion errors of a linear stage is performed to enable accurate measurement of motion errors in linear directions and a rotational direction in the linear stage using a diffraction grating. A first beam splitter splits a laser beam emitted from a light emitting unit. A first measurement unit measures a unidirectional linear motion error of the linear stage using one laser beam component split by the first beam splitter and a second measurement unit measures an angular motion error and another unidirectional linear motion of the linear stage error using a diffracted beam component obtained by diffracting another laser beam component split by the first beam splitter through the diffraction grating. A third measurement unit circularly polarizes the beam component diffracted through the diffraction grating to measure a third unidirectional linear motion error of the linear stage.
    • 执行线性级的运动误差的测量以使得能够使用衍射光栅精确地测量线性方向上的运动误差和线性级中的旋转方向。 第一分束器分离从发光单元发射的激光束。 第一测量单元使用由第一分束器分裂的一个激光束分量来测量线性平台的单向线性运动误差,第二测量单元使用衍射光束分量来测量角运动误差和线性级误差的另一单向线性运动 通过衍射由第一分束器分裂的另一激光束分量衍射光栅获得。 第三测量单元使通过衍射光栅衍射的束分量圆偏振,以测量线性级的第三单向线性运动误差。