Superresolving optical system using time multiplexing computer decoding and image processing

Amir Shemer; David Mendlovic; Zeev Zalevsky; Emanuel Marom

doi:10.1117/12.386782

24 May 2000 Superresolving optical system using time multiplexing computer decoding and image processing

Amir Shemer, David Mendlovic, Zeev Zalevsky, Emanuel Marom

Proceedings Volume 4089, Optics in Computing 2000; (2000) https://doi.org/10.1117/12.386782
Event: 2000 International Topical Meeting on Optics in Computing (OC2000), 2000, Quebec City, Canada

Abstract

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.

Citation Download Citation

Amir Shemer, David Mendlovic, Zeev Zalevsky, and Emanuel Marom "Superresolving optical system using time multiplexing computer decoding and image processing", Proc. SPIE 4089, Optics in Computing 2000, (24 May 2000); https://doi.org/10.1117/12.386782

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KEYWORDS

Super resolution

Ronchi rulings

Fourier transforms

Image processing

Diffraction gratings

Multiplexing

Spatial frequencies

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