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We report on the assembly of an off-axis reflective imaging system employing freeform, φ-polynomial optical surfaces. The sensitivity of the system to manufacturing errors is studied for both a passive and active alignment approach. The as-built system maintains diffraction-limited performance in the long-wave infrared.

Since the last IODC meeting, the field of optical design with freeform surfaces has burst onto the scene. This talk will present a first of its kind, all reflective, unobscured, three-mirror 10° full field of view, F/1.9 operational freeform imaging telescope from design to full assembly.

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