Pulsed light beam spectral feature control

    公开(公告)号:US09772556B2

    公开(公告)日:2017-09-26

    申请号:US15435491

    申请日:2017-02-17

    Applicant: Cymer, LLC

    Abstract: A system includes a first actuatable apparatus of an optical source, the first actuatable apparatus being altered within a range of values about a target value to thereby alter a spectral feature of the light beam; a second actuatable apparatus of the optical source, the second actuatable apparatus being altered to thereby alter the spectral feature of the light beam; a metrology system including an observation system configured to output an indication of a deviation between the actual value at which the first actuatable apparatus is operating and the target value; and a control system configured to determine whether the deviation is greater than an acceptable deviation, and, if it is greater than the acceptable deviation, then send a signal to a second actuation module controlling the second actuatable apparatus to adjust the actual value at which the first actuatable apparatus is operating to be closer to the target value.

    Spectrometer with multiple Fabry-Perot filters for gas analysis

    公开(公告)号:US09752931B2

    公开(公告)日:2017-09-05

    申请号:US14488608

    申请日:2014-09-17

    Applicant: SICK AG

    Abstract: A spectrometer (10) for gas analysis is provided, the spectrometer comprising a measurement cell (28) having a gas to be investigated, a light source (12) for the transmission of light (14) into the measurement cell (28) on a light path (16), a filter arrangement (22) having a Fabry-Perot filter (24a-c) in the light path (16), in order to set frequency properties of the light (14) by means of a transmission spectrum of the filter arrangement (22), as well as a detector (36, 38) which measures the absorption of the light (14) by the gas (30) in the measurement cell (28). In this connection the filter arrangement (22) has a plurality of Fabry-Perot filters (24a-c) arranged behind one another in the light path (14) and a control unit (44) for the filter arrangement (22) is provided in order to change the transmission spectrum by setting at least one of the Fabry-Perot filters (24a-c).

    System and Method for Imaging a Sample with an Illumination Source Modified by a Spatial Selective Wavelength Filter
    156.
    发明申请
    System and Method for Imaging a Sample with an Illumination Source Modified by a Spatial Selective Wavelength Filter 审中-公开
    用空间选择波长滤波器修改的照明源成像样品的系统和方法

    公开(公告)号:US20170059490A1

    公开(公告)日:2017-03-02

    申请号:US14839338

    申请日:2015-08-28

    Abstract: A system for illuminating a sample with a spectrally filtered illumination source includes an illumination source configured to generate a beam of illumination having a first set of wavelengths. In addition, the system includes a wavelength filtering sub-system, a sample stage, an illumination sub-system, a detector, and an objective to focus illumination from the surface of one or more samples and focus the collected illumination to the detector. Further, the wavelength filtering sub-system includes one or more first dispersive elements positioned to introduce spatial dispersion into the beam, a spatial filter element, and one or more dispersive elements positioned to remove spatial dispersion from the beam. The spatial filter element is further positioned to pass at least a portion of the beam including a second set of wavelengths, wherein the second set of wavelengths is a subset of the first set of wavelengths.

    Abstract translation: 用频谱滤波的照明源照射样本的系统包括被配置为产生具有第一组波长的照明束的照明源。 此外,该系统包括波长滤波子系统,样本台,照明子系统,检测器和用于聚焦来自一个或多个样本的表面的照明并将所收集的照明聚焦到检测器的目的。 此外,波长滤波子系统包括定位成将空间色散引入光束中的一个或多个第一色散元件,空间滤光元件以及定位成从光束去除空间色散的一个或多个色散元件。 空间滤波器元件还被定位成使包括第二组波长的波束的至少一部分通过,其中第二组波长是第一组波长的子集。

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