29 August 2017 Image restoration for an encoded pupil plane
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Proceedings Volume 10313, Opto-Canada: SPIE Regional Meeting on Optoelectronics, Photonics, and Imaging; 103133I (2017) https://doi.org/10.1117/12.2283922
Event: Opto-Canada: SPIE Regional Meeting on Optoelectronics, Photonics, and Imaging, 2002, Ottawa, Ontario, Canada
Abstract
To extend the depth-of-focus of incoherent imaging systems an aspherical pupil plane element is designed to encode the incident wavefront in such a way that the image recorded by the detector can be accurately restored over a large range of defocus. This approach alleviates thermal and chromatic defocus whilst maintaining diffraction-limited resolution for incoherent imaging systems [1] by using simple and low-cost one- or two-element lenses. However this is bought at the price of a reduction in signal-to-noise ratio of the displayed image as is associated with most inverse filtering problems. This sets a serious limit to future applications, particularly in thermal imaging where the optical systems involve fast optics with a very small depth of field for which signal-to-noise ratio of restored images can be reduced significantly.
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Samir Mezouari, Samir Mezouari, } "Image restoration for an encoded pupil plane", Proc. SPIE 10313, Opto-Canada: SPIE Regional Meeting on Optoelectronics, Photonics, and Imaging, 103133I (29 August 2017); doi: 10.1117/12.2283922; https://doi.org/10.1117/12.2283922
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