Study of a Hartmann Wavefront Sensor Sytem for Solar Observation

Using the observational data from the Solar Optical Telescope (SOT) aboard the HINODE satellite,we compute the spatial spectra and correlation coefficients of solar granulations and the umbra and penumbra of a sunspot.We analyze the influence of solar image structural differences on accuracies of a Hartmann wavefront sensor system for solar observation.As our calculation and analysis show,when the subaperture wavefront tilt is less than 0.25" and the sampling time is small enough (-within 2 mimutes for granulations or within 4 minutes for the unbra/penumbra of a sunspot),the influence is little.The influence will increase with wavefront distortion.These results can serve as references for developing and using of a Hartmann wavefront sensor for solar observation.