Relevance of continuously self-imaging gratings for noise robust imagery

We have designed miniaturized, simple, and robust cameras composed of a single diffractive optical element (DOE) that generates a continuously self-imaging (CSI) beam. Two different DOEs are explored: the J0 Bessel transmittance, characterized by a continuous optical transfer function (OTF) and the...

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Bibliographic Details
Published in:Optics letters 2012-09, Vol.37 (17), p.3492-3494
Main Authors: Piponnier, Martin, Horisaki, Ryoichi, Druart, Guillaume, Guérineau, Nicolas, Kattnig, Alain, Primot, Jérôme
Format: Article
Language:English
Subjects:
Beams (radiation)
Cameras
Diffraction gratings
Gratings (spectra)
Noise
Robustness
Transmittance
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Summary:We have designed miniaturized, simple, and robust cameras composed of a single diffractive optical element (DOE) that generates a continuously self-imaging (CSI) beam. Two different DOEs are explored: the J0 Bessel transmittance, characterized by a continuous optical transfer function (OTF) and the CSI grating (CSIG), characterized by a sparse OTF. In this Letter, we will analyze the properties of both DOEs in terms of radiometric performances. We will demonstrate that the noise robustness is enhanced for a CSIG, thanks to the sparsity of its OTF. A camera using this DOE has been made and experimental images are presented to illustrate the noise robustness.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.37.003492