In astronomical observation and space object detection

larger-aperture telescopes are used widely.Liquid crystal adaptive optics imaging technology has been used in correction of the aberration caused by atmospheric turbulence.In order to verify the validity of the technology

Zemax software and the optical components as few number as possible are used to design the compact type closed-loop liquid crystal adaptive optical system

and the characteristic of the system is evaluated.The specific tolerance principle is established.According to the tolerance analysis

it can be seen that the compact type adaptive optical system has a more relaxed tolerance conditions.And it is easier to achieve processing and alignment. We designed the compact type closed-loop liquid crystal adaptive optical system and make it match 1 200 mm telescope.The property of the whole system was evaluated correspondently.The focal length of the whole optical system is 19.13 m and the

F

number is 17.92.The peak-valve(

P-V

) value is 0.122

.The RMS value is 0.031

. The modulation transfer function(MTF) of the whole system is almost the same as the diffraction limited. MTF is 0.5 at 33 lp/mm.The limited resolution of the CCD is 31 lp/mm

we could see that the resources of CCD has been used effectively.