Sakon, Itsuki; Ikeda, Yuji
; Nakagawa, Hiroyuki; Tokoro, Hitoshi; Honda, Mitsuhiko; Okamoto, Yoshiko K.; Kataza, Hirokazu; Onaka, Takashi; Chun, Mark R.; Richter, Matthew J.; Packham, Christopher
We have carried out a trial production of the large-format (n=11) image slicer unit for a possible future mid-infrared instrument on the TMT aiming to verify its technical feasibility. The key elements in our trial production are the monolithic large-format slice mirrors and the monolithic large-format pupil mirrors. The results of our trial production of those key elements based on the ultra high-precision cutting techniques and the assembly of the large-format image slicer unit are presented in this paper.