Schematic diagram of an adaptive optics system.|@|~(^,^)~|@|Picture of the developed SiC deformable mirror with 37 actuators operating at 500Hz.|@|~(^,^)~|@|Images of the dome and telescope with the SLODAR instrument at the Bohyun Observatory: (a) Dome; (b) Telescope with the SLODAR instrument.|@|~(^,^)~|@|Temporal variation of the total seeing (r_o) values over one night (20 Nov. 2014).|@|~(^,^)~|@|Schematic layout of the test-bed for the SiC DM evaluation. The turbulence simulator is shown in the dotted box in the figure.|@|~(^,^)~|@|Concept of the frozen flow hypothesis. An atmospheric disturbance is spatially random but frozen-flows at the mean velocity. Circles represent the telescope aperture at each flowing instance.|@|~(^,^)~|@|Computer-generated phase screens over an area which is 10 × 10 times larger than telescope aperture for r_o = 7 and 12 cm, respectively. Scales of the figures are both in units of radian: (a) r_o=7 cm; (b) r_o=12 cm.|@|~(^,^)~|@|Computer-generated phase screens when r_o=7 and corresponding DM deformation when measured by a Shack-Hartmann sensor. Each plot is over the single telescope aperture: (a) Computer-generated phase screens in time sequences; (b) DM generated phase deformations as measured by a Shack-Hartmann sensor.|@|~(^,^)~|@|Picture of the turbulence simulator using two rotating plates.|@|~(^,^)~|@|Binary star simulation in the turbulence simulator and two resulting images: (a) Binary star formation; (b) Two resulting images with different angular separations.

Current Optics and Photonics 2017;1:107~112 https://doi.org/10.3807/COPP.2017.1.2.107