The Imaka project is a ground layer adaptive optics system proposed for the Canada-France-Hawaii Telescope. This
paper presents the optical design of a Cassegrain mounted ground layer adaptive optics system with a 0.8 degree field of
view for Imaka. The design incorporates a Takeshi concentric ADC and a f/8 to f/5.7 reducer. This is followed with a
novel double pass system to image the pupil on a 300mm mildly concave deformable mirror and re-image the system on
the detector. The design meets the required 0.15" 80% encircled energy image performance, including correction for
atmospheric dispersion. The optical design is presented with the predicted imaging performance.
John Pazder, John Pazder,
"Optical design of a Cassegrain mounted AO relay for Imaka", Proc. SPIE 8447, Adaptive Optics Systems III, 84473U (13 September 2012); doi: 10.1117/12.925859; https://doi.org/10.1117/12.925859