• Christopher Hall

    Senior Engineer, QED Optics

    Christopher Hall is senior engineer at QED Optics (Rochester, NY).

    FIGURE 1. A plano wavefront propagates through, and is aberrated by, a right-angle prism.
    Optics & Design

    Test and Measurement: MRF fabricates 'perfectly bad' surfaces

    Mike DeMarco
    Feb. 10, 2014
    Magnetorheological finishing (MRF) can be used to modify and characterize a surface in an optical system so that it is "perfectly bad," or precisely compensating for all other...