Single-shot ultrafast burst imaging using an integral field spectroscope with a microlens array

Microlens-array based plenoptic cameras capture the light field in a single shot, enabling new potential applications but also introducing additional challenges. A plenoptic image consists of thousand of microlens images. Estimating the disparity for each microlens allows to render conventional images, changing the perspective and the focal settings, and to reconstruct the three-dimensional geometry of the scene. The work includes a blur-aware calibration method to model plenoptic cameras, an optimization method to accurately select the best microlenses combination for disparity estimation, an overview of the different types of plenoptic cameras, an analysis of the disparity estimation algorithms, and a robust depth estimation approach for light field microscopy. The research led to the creation of a full framework for plenoptic cameras, which contains the implementation of the algorithms discussed in the work and datasets of both real and synthetic images for comparison, benchmarking and future research.

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BIGRE: a new double microlens array for the integral field spectrograph of SPHERE

10.1117/12.789354 ◽

2008 ◽

Author(s):

E. Giro ◽

R. U. Claudi ◽

J. Antichi ◽

P. Bruno ◽

E. Cascone ◽

...

Keyword(s):

Microlens Array ◽

Integral Field Spectrograph ◽

Integral Field

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The PYTHEAS concept and applications

International Astronomical Union Colloquium ◽

10.1017/s0252921100023204 ◽

1995 ◽

Vol 149 ◽

pp. 300-307

Author(s):

Y.P. Georgelin ◽

G. Comte ◽

E. le Coarer

Keyword(s):

Spectral Range ◽

Spectral Resolution ◽

Flux Measurement ◽

Microlens Array ◽

High Spectral Resolution ◽

Wide Spectral Range ◽

Field Sampling ◽

Fabry Perot ◽

Field Element ◽

Integral Field

AbstractThe PYTHEAS instrumental concept is an attempt to solve the problem of getting a complete tridimensional coverage of the observed field with a high spectral resolution across a wide spectral range. It is an integral field spectrometer derived from the TIGER spectrograph (field sampling with a microlens array) in which a scanning Fabry-Perot (FP) is introduced. The spectral resolution is given by the F P and the spectral range is that allowed by the grism of TIGER. The information is recorded on the CCD as a set of channeled spectra, for each microlens and each scanning step of the FP. The spectrum of each sampled field element is reconstructed from flux measurement of the Fabry spots defining the channeled spectra.The application ranges of this instrument are reviewed with emphasis on the potential interest in globular cluster studies.

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Single-Shot Ultrafast Burst Imaging using Integral Field Spectrograph with a Lenslet Array

14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020) ◽

10.1364/cleopr.2020.p4_10 ◽

2020 ◽

Author(s):

Shota Itoyama ◽

Hirofumi Nemoto ◽

Kazuki Takasawa ◽

Riku Watase ◽

Fumihiko Kannari

Keyword(s):

Single Shot ◽

Lenslet Array ◽

Integral Field Spectrograph ◽

Integral Field

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Single-shot 3D wide-field fluorescence imaging with a Computational Miniature Mesoscope

Science Advances ◽

10.1126/sciadv.abb7508 ◽

2020 ◽

Vol 6 (43) ◽

pp. eabb7508

Author(s):

Yujia Xue ◽

Ian G. Davison ◽

David A. Boas ◽

Lei Tian

Keyword(s):

Light Emitting Diode ◽

Lightweight Design ◽

Three Dimensional ◽

Microlens Array ◽

Computational Imaging ◽

Depth Of Field ◽

Wide Field ◽

Single Shot ◽

Light Emitting ◽

Imaging Capability

Fluorescence microscopes are indispensable to biology and neuroscience. The need for recording in freely behaving animals has further driven the development in miniaturized microscopes (miniscopes). However, conventional microscopes/miniscopes are inherently constrained by their limited space-bandwidth product, shallow depth of field (DOF), and inability to resolve three-dimensional (3D) distributed emitters. Here, we present a Computational Miniature Mesoscope (CM2) that overcomes these bottlenecks and enables single-shot 3D imaging across an 8 mm by 7 mm field of view and 2.5-mm DOF, achieving 7-μm lateral resolution and better than 200-μm axial resolution. The CM2 features a compact lightweight design that integrates a microlens array for imaging and a light-emitting diode array for excitation. Its expanded imaging capability is enabled by computational imaging that augments the optics by algorithms. We experimentally validate the mesoscopic imaging capability on 3D fluorescent samples. We further quantify the effects of scattering and background fluorescence on phantom experiments.

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