Light field camera as a Fourier transform spectrometer sensor: instrument characterization and passive spectral ranging

Côté, Alexandra; Levasseur, Simon; Boudreau, Stéphane; Genest, Jérôme

doi:10.1364/ao.53.004327

Cited by 4 publications

(1 citation statement)

References 5 publications

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“…This property can be used to build spectrometers to capture both spectral and spatial information with a single shot acquisition. Côté et al [70] have built a Fourier transform spectrometer with a light field camera by observing shear and tilt fringes.…”

Section: Integral Field Imagingmentioning

confidence: 99%

Micromachined tunable diffraction grating for diverse imaging in integral field spectroscopy

Sanathanan¹

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This report presents the design and development of micro-optical components for a computational imaging spectrometer. The main elements that were involved in the optical design include a microlens array that samples the spatial information and a diffraction grating that provides spectral information. One of the significant drawbacks of scanning based imaging systems is the low light collection efficiency. The new technique proposed in this study used a quasi-snapshot technology that significantly improves the optical throughput. In a quasi-snapshot system, multiple images are captured with the optical system that can tune its optical transfer function (OTF). In this work, tunable micro-optics were investigated for the realization preparation of presentations, articles, and thesis; Python package distribution especially numpy, mathplotlib; Mendeley for reference managing; Inkscape for vector graphics editor; KLayout for mask designing; and Fiji-ImageJ for image processing and analysis. I would also like to thank all others, whose direct or indirect help has benefited me during my stay at Nanyang Technological University. I express my gratitude towards all those unseen and unknown people associated with the internet, and the plethora of technical websites, forums, groups and mailing lists which have helped me with study material for my research work. Last but not the least, I would like to thank my parents and family members for their eternal love and extensive support all throughout my career.

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Section: Integral Field Imagingmentioning

confidence: 99%

Micromachined tunable diffraction grating for diverse imaging in integral field spectroscopy

Sanathanan¹

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Free-form surface design method for nonaxial-symmetrical reflectors producing arbitrary image patterns

Tsai

2016

Opt. Eng

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Simplified projection technique to correct geometric and chromatic lens aberrations using plenoptic imaging

Dallaire

Thibault

2017

Appl. Opt.

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Plenoptic imaging has been used in the past decade mainly for 3D reconstruction or digital refocusing. It was also shown that this technology has potential for correcting monochromatic aberrations in a standard optical system. In this paper, we present an algorithm for reconstructing images using a projection technique while correcting defects present in it that can apply to chromatic aberrations and wide-angle optical systems. We show that the impact of noise on the reconstruction procedure is minimal. Trade-offs between the sampling of the optical system needed for characterization and image quality are presented. Examples are shown for aberrations in a classic optical system and for chromatic aberrations. The technique is also applied to a wide-angle full field of view of 140° (FFOV 140°) optical system. This technique could be used in order to further simplify or minimize optical systems.

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Light field camera as a Fourier transform spectrometer sensor: instrument characterization and passive spectral ranging

Cited by 4 publications

References 5 publications

Micromachined tunable diffraction grating for diverse imaging in integral field spectroscopy

Micromachined tunable diffraction grating for diverse imaging in integral field spectroscopy

Free-form surface design method for nonaxial-symmetrical reflectors producing arbitrary image patterns

Simplified projection technique to correct geometric and chromatic lens aberrations using plenoptic imaging

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