TMT Work to Resume Says Ige!

[TomK]

Although defocus is one optical aberration the segments are designed to correct, the others, which include astigmatism, coma and trefoil are all rather important. The correction for these aberrations has been successfully achieved at other telescopes using similar technologies, including the Kecks which are being used as a model for the TMT. The size of the telescope is relatively unimportant, it's the focal length that plays are larger role in how significant all these aberrations are. If it were just defocus, you wouldn't need to worry so much about bending the segments.

http://www.tmt.org/sites/default/files/d...ie2009.pdf

http://www.tmt.org/sites/default/files/M...ground.pdf