Abstract: A method of super-resolution imaging is described ,which utilizes cosine fringes to acquire more spatial frequency spectrum of the object. The spatial frequency of the object illuminated by the cosine fringes is shifted, thus a portion of high frequency components beyond the cutoff frequency could pass through the optical system. The image is achieved separately after illuminating many fringes, which has the same spatial frequency but different phase. Then the images are processed to separate the frequency components and reconstruct the original spectrum. Finally, the computer simulation demonstrates the feasibility of the new technique.