Improvements in the design and manufacture of polymer layered gradient index optics (LGRIN) are described. As a demonstration of the manufacturing improvements, the design and performance of a 22 mm diameter, 80 mm focal length f/4 achromatic LGRIN singlet is presented. This lens demonstrates a step-change in LGRIN quality. For the first time, radially asymmetric aberrations within a curved LGRIN interface geometry are not the leading-order contribution to the performance gap between as-designed and as-manufactured performance.
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