Developing a new hyperspectral imaging interferometer for earth observation

Barducci, Alessandro; Castagnoli, F.; Castellini, G.; Guzzi, Donatella; Lastri, Cinzia; Marcoionni, Paolo; Nardino, Vanni; Pippi, Ivan

doi:10.1117/1.oe.51.11.111706

Cited by 15 publications

(4 citation statements)

References 27 publications

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“…Such transmission coefficients represent the transmission of the interferometer, excluding Fresnel losses at the entrance and exit interfaces with air of the whole device, as explained in the footnote 3 . The first one, T oe , characterizes the strength of 3 As already stated, device external interfaces with air are usually anti-reflection coated, leading to extremely low Fresnel losses when light enters or exits the device. Moreover Fresnel transmission coefficients at the first isotropic/birefringent interface depend on the incident beam polarization, and Fresnel transmission coefficients at the last birefringent/isotropic interface depend on the polarization of the exit mode considered in the last isotropic semi-infinite medium.…”

Section: Modeling Of the Real Behavior Of Birefrin-gent Imaging Intermentioning

confidence: 99%

“…Imaging Static Fourier Transform Spectrometry (SFTS) is a good approach for airborne or spaceborne hyperspectral imaging [1][2][3][4][5][6], especially thanks to its sturdiness (no moving part except the carrier or the scan turret) and its high flux collection efficiency [7]. The formerly cited references give detailed explanations on the setup and underlying optical principles of such instruments; the key point is to superimpose quasi-linearly shaped interference fringes on the scene image.…”

Section: Introductionmentioning

confidence: 99%

“…The formerly cited references give detailed explanations on the setup and underlying optical principles of such instruments; the key point is to superimpose quasi-linearly shaped interference fringes on the scene image. Efficient large étendue imaging instruments usually rely on a shearing interferometer, most often a cyclic interferometer [1][2][3][4] or a roof-prism mirrors Michelson interferometer [5,6,8]. For more compact setups, birefringent shearing interferometers like Savart plates [9][10][11] a Armande Pola Fossi is now with Thales LAS France SAS, 2 avenue Gay- or Double-Wollaston prism devices [12,13] are often used, either for imaging spectrometry or for non-imaging spectrometry.…”

Section: Introductionmentioning

confidence: 99%

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Numerical modeling of nominal and stray waves in birefringent interferometers: application to large-field-of-view imaging Fourier transform spectrometers

et al. 2018

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Birefringent interferometers are often used for compact static Fourier transform spectrometers. In such devices, several uniaxial birefringent parallel or prismatic plates are stacked, with their optical axes set so that there is an efficient coupling from ordinary to extraordinary and extraordinary to ordinary eigenmodes of two successive plates. Such coupling, aside from few particular cases, is however not perfect, an effect that may adversely affect performance. In order to help the design and the tolerancing of these interferometers, we have developed a numerical modeling, based on the propagation of plane waves inside and through the interface of birefringent media. This tool evaluates the traveled optical path length and the amplitude of the different polarization modes, enabling to predict both the optical path differences on the interferometer outputs and the unwanted coupling strengths and related stray wave amplitudes. The tool behavior is illustrated on Savart and Double-Wollaston interferometers, and compared with experimental characterization of a calcite Double-Wollaston prism. OCIS codes: (260.1440) Birefringence; (120.6200) Spectrometers and spectroscopic instrumentation; (110.4234) Multispectral and hyperspectral imaging; (120.0280) Remote sensing and sensors; (120.4570) Optical design of instruments; (300.6300) Spectroscopy, Fourier transforms; (220.4830) Systems design.

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Section: Modeling Of the Real Behavior Of Birefrin-gent Imaging Intermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical modeling of nominal and stray waves in birefringent interferometers: application to large-field-of-view imaging Fourier transform spectrometers

et al. 2018

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“…Additionally, this system offers benefits such as a high luminous flux, spectral linearity, a lightweight structure, and a broad spectral range while effectively resolving the challenge of maintaining high optical flux and stability. In recent years, several interferometers that use LASIS-like principles have been proposed, such as the aerospace leap-frog imaging static interferometer for earth observation (ALISEO) [6], the long wavelength infrared (LWIR) hyperspectral imager [7], and the large-aperture spatial heterodyne imaging spectrometer (LASHIS) [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Lossless Compression of Large Aperture Static Imaging Spectrometer Data

et al. 2023

Applied Sciences

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The large-aperture static imaging spectrometer (LASIS) is an interference spectrometer with high device stability, high throughput, a wide spectral range, and a high spectral resolution. One frame image of the original data cube acquired by the LASIS shows the image superimposed with interference fringes, which is distinctly different from traditional hyperspectral images. For compression studies using this new type of data, a lossless compression scheme that combines a novel data rearrange method and the lossless multispectral and hyperspectral image compression standard CCSDS-123 is presented. In the rearrange approach, the LASIS data cube is rearranged such that the interference information overlapped on the image can be separated, and the results are then processed using the CCSDS-123 standard. Then, several experiments are conducted to investigate the performance of the rearrange method and examine the impact of different CCSDS-123 parameter settings for the LASIS. The experimental results indicate that the proposed scheme provides a 32.9% higher ratio than traditional rearrange methods. Moreover, an adequate parameter combination for this compression scheme for LASIS is presented, and it yields a 19.6% improvement over the default settings suggested by the standard.

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Digital micro-mirror device based multispectral imaging using compressed Fourier spectrum

Lin

Zhang

et al. 2018

Optics Communications

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Developing a new hyperspectral imaging interferometer for earth observation

Cited by 15 publications

References 27 publications

Numerical modeling of nominal and stray waves in birefringent interferometers: application to large-field-of-view imaging Fourier transform spectrometers

Numerical modeling of nominal and stray waves in birefringent interferometers: application to large-field-of-view imaging Fourier transform spectrometers

Lossless Compression of Large Aperture Static Imaging Spectrometer Data

Digital micro-mirror device based multispectral imaging using compressed Fourier spectrum

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