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    • Rebecca Durfee

    Optical Design Consultant, Thresher Engineering and Optics

    Rebecca Durfee, formerly of II-VI Infrared (now Coherent), is an optical design consultant for Thresher Engineering and Optics (Mars, PA).

    FIGURE 1. A ray trace of the marginal ray through a lens shows the position error at focus (image plane), with LSA and TSA labeled.
    Optics

    How can you tell if you really need an aspheric lens?

    Gary Herrit
    March 16, 2023
    Focused beam metrics are crucial for evaluating lens types for laser applications.