Fig. 1. Schematic illustration of two different mirror surface figures: (a) with low-frequency errors; (b) with high-frequency errors.

Fig. 2. Illustration of the multiplied wavefront error.

Fig. 3. Coma power spectrum.

Fig. 4. Astigmatism power spectrum.

Fig. 5. Quatrefoil power spectrum.

Fig. 6. Tertiary mirror surface figure error (tilt removed).

Fig. 7. Normalized tertiary mirror surface figure error.

Fig. 8. PSD of the TMT tertiary mirror.