Objective Lens Optimized for Wavefront Delivery, Pupil Imaging, and Pupil Ghosting

An interferometer objective lens (or diverger) may be used to transform a collimated beam into a diverging or converging beam. A typical objective lens is optimized to deliver a diffraction-limited beam to an optic or optical system under test. Often, imaging performance with respect to the interferometer pupil is not optimal. The center of curvature test for the James Webb Space Telescope required a better solution.This innovation provides an objective lens that has diffraction-limited optical performance that is optimized at two sets of conjugates: imaging to the objective focus and imaging to the pupil. The lens thus provides for simultaneous delivery of a high-quality beam and excellent pupil resolution properties.