Objects that temporally vary slowly, may be super resolved using two moving masks such as pinhole or grating. The setup requires two physical gratings that should move in a synchronized manner. This approach is efficient for exceeding the resolving capability of Abbe's limit. Moreover, it was based on coherent illumination and required a certain approximation. In this work the second grating, which is responsible for the information decoding, is replaced by a detector array and post-processing procedures. This way, the synchronization problem existing when two gratings are used is simplified. Furthermore, two novel approaches for getting accurate coherent super-resolution and overcoming the distortions exhibited by Ronchi gratings and manufacturing imperfections are also presented. In the first approach the grating in the image plane is moved with a velocity which is half the required velocity. In the second approach, different parts of the spectrum are transmitted through the system's aperture that allows a post processing ability. Experimental results are provided for demonstrating the ability of the new approach.
|Number of pages
|Proceedings of SPIE - The International Society for Optical Engineering
|Published - 2000
|Optics in Computing 2000 - Quebec City, Can
Duration: 18 Jun 2000 → 23 Jun 2000