Optical MEMS for space spectro-imagers

Liotard, Arnaud; Zamkotsian, Frédéric; Noell, Wilfried; Viard, Thierry; Freire, Marco; Guldimann, Benedikt; Kraft, Stefan

doi:10.1117/12.926142

Cited by 3 publications

(3 citation statements)

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“…French and European space agencies, the Centre National d'Etudes Spatiales (CNES) and the European Space Agency (ESA) have initiated several studies with LAM and TAS for listing the new functions associated with several types of MEMS, and developing new ideas of instruments. 1,2,3 Several MEMS devices have been considered in terms of performance and abilities for different functions: (a) Programmable slits; (b) Programmable micro-diffraction gratings; (c) Micro-deformable mirrors.…”

Section: Introductionmentioning

confidence: 99%

DMD-based programmable wide field spectrograph for Earth observation

et al. 2015

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In Earth Observation, Universe Observation and Planet Exploration, scientific return could be optimized in future missions using MOEMS devices. In Earth Observation, we propose an innovative reconfigurable instrument, a programmable wide-field spectrograph where both the FOV and the spectrum could be tailored thanks to a 2D micromirror array (MMA). For a linear 1D field of view (FOV), the principle is to use a MMA to select the wavelengths by acting on intensity. This component is placed in the focal plane of a first grating. On the MMA surface, the spatial dimension is along one side of the device and for each spatial point, its spectrum is displayed along the perpendicular direction: each spatial and spectral feature of the 1D FOV is then fully adjustable dynamically and/or programmable. A second stage with an identical grating recomposes the beam after wavelengths selection, leading to an output tailored 1D image. A mock-up has been designed, fabricated and tested. The micromirror array is the largest DMD in 2048 x 1080 mirrors format, with a pitch of 13.68µm. A synthetic linear FOV is generated and typical images have been recorded o at the output focal plane of the instrument. By tailoring the DMD, we could modify successfully each pixel of the input image: for example, it is possible to remove bright objects or, for each spatial pixel, modify the spectral signature. The very promising results obtained on the mock-up of the programmable wide-field spectrograph reveal the efficiency of this new instrument concept for Earth Observation.

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Section: Introductionmentioning

confidence: 99%

DMD-based programmable wide field spectrograph for Earth observation

et al. 2015

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“…In the new design, the optical MEMS is a micro-mirror located at the entrance of the spectrometer. All other elements are kept such as the scrambling window unit, the catadiotric objective, the concave grating and the focal plane [1] …”

Section: A Optical Designmentioning

confidence: 99%

Efficient optical cloud removal technique for earth observation based on MOEMs device

Zamkotsian

Lanzoni

Liotard

et al. 2017

International Conference on Space Optics — ICSO 2012

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-In Earth Observation instruments, observation of scenes including bright sources leads to an important degradation of the recorded signal. We propose a new concept to remove dynamically the bright sources and then obtain a field of view with an optically enhanced Signal-to-Noise Ratio (SNR). Micro-Opto-Electro-Mechanical Systems (MOEMS) could be key components in future generation of space instruments. MOEMS-based programmable slit masks will permit the straylight control in future Earth Observation instruments. Experimental demonstration of this concept has been conducted on a dedicated bench. This successful first demonstration shows the high potential of this new concept in future spectro-imager for Earth Observation.

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“…French and European space agencies, the Centre National d'Etudes Spatiales (CNES) and the European Space Agency (ESA) have initiated several studies with LAM and TAS for listing the new functions associated with several types of MEMS, and developing new ideas of instruments. [1,2,3] Several MEMS devices have been considered in terms of performance and abilities for different functions:…”

Section: Introductionmentioning

confidence: 99%