Fig. 1. Physical image and optical path diagram of NVST. (a) Physical image; (b) optical path diagram

Fig. 2. Optical path of H-S wavefront sensor with filter

Fig. 3. C-Blue One CMOS camera

Fig. 4. Acquired images in fact. (a) Prominence image; (b) dark-field image; (c) flat-field image

Fig. 5. Three-dimensional graphs for the correlation of the single sub-aperture. (a) CC algorithm; (b) AD algorithm

Fig. 6. Offset of each sub-aperture in the first frame image

Fig. 7. Time series of slope signal for the first sub-aperture. (a) Horizontal direction; (b) vertical direction

Fig. 8. Time series of slope signals for all sub-apertures. (a) Horizontal direction; (b) vertical direction

Fig. 9. Time series for all tilt signals. (a) Horizontal direction; (b) vertical direction

Fig. 10. PSD of each sub-aperture

Fig. 11. PSD of all sub-apertures

Fig. 12. SNR of each sub-aperture