Freeform Illustration (IMAGE) University of Rochester Caption Using a new step-by-step method developed by Aaron Bauer, a senior research engineer at the University of Rochester's Center for Freeform Optics (CeFO), these eight different designs for a three-mirror reflective imager were ranked by their potential to be corrected using freeform optics, with Tier 1 having the greatest potential. Credit (University of Rochester illustration / courtesy Jannick Rolland) Usage Restrictions give credit License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.