Lensless Super-resolution imaging based on multi-wavelength illumination

Lensless imaging technique, as a newly developed microscopic imaging method, combined with its corresponding image restoration algorithm, and it can obtain large-field, high-resolution three-dimensional images without labeling. Therefore, the lensless imaging system has the advantages of low cost, good portability, large field of view and high resolution. However, due to the limitation of pixel size, hardware implementation and post data processing, the imaging resolution of lensless microscopy is far away from theoretical performance. In order to solve above problems, this paper proposes a method to improve the capability registration and information coupling based on multi-wavelength illumination. Moreover, this work combines a stack of captured low-resolution images into a high-resolution result image, and the pixel super-resolution can be realized throught the reconstruction algorithm based on the exist illumination light source, Finally, experimental results utilizing USAF target demonstrate the success of proposed lensless imaging method.