Spectrometer, metrology system, and semiconductor inspection method

    公开(公告)号:US12188818B2

    公开(公告)日:2025-01-07

    申请号:US17827051

    申请日:2022-05-27

    Abstract: A spectrometer and a metrology system capable of improving spectral performance are provided. The spectrometer includes a collimator lens, a focusing lens, and a spatial light modulator (SLM), wherein light reflected by the SLM is output from an output slit through the focusing lens and a dispersive optical element, and on a second plane perpendicular to a first plane including optical paths of pieces of light dispersed at different angles, an incident slit, the output slit, and a reflective plane have a conjugate relationship.

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