Mr. Antonio Campos-Jara Profile

Antonio Campos-Jara

at INTA Instituto Nacional de Tecnica Aerospacial

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Author

Publications (3)

Proceedings Article | 29 August 2022 Poster + Paper

End-to-end tests of the TuMag instrument for the SUNRISE III mission

Alberto Álvarez Herrero, Daniel Garranzo-García, Armonía Núnez, Manuel Silva-López, Antonio Campos-Jara, Pilar García Parejo, María Cebollero, Julia Atienzar, Francisco Bailén, Julian Blanco Rodríguez, Pablo Santamarina, David Orozco Suárez, Jose Carlos del Toro Iniesta

Proceedings Volume 12184, 121842F (2022) https://doi.org/10.1117/12.2629272

KEYWORDS: Polarimetry, Cameras, Modulation transfer functions, Polarization, Modulation, Calibration, Sun, Imaging systems, Image resolution, Fabry–Perot interferometers

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Proceedings Article | 29 August 2022 Poster + Paper

TuMag for SUNRISE III mission: development of the optical unit of an imaging spectropolarimeter

Alberto Álvarez Herrero, Ana Fernández-Medina, María Cebollero, Daniel Garranzo-García, Armonía Núñez, Alejandro Gonzalo, Antonio Sánchez, Javier Villanueva, Pilar García Parejo, Antonio Campos-Jara, Manuel Silva-López, Ricardo San Julián, Hugo Laguna

Proceedings Volume 12184, 121842G (2022) https://doi.org/10.1117/12.2629391

KEYWORDS: Fabry–Perot interferometers, Polarization, Cameras, Telescopes, Mirrors, Thermography, Sensors, Optical filters, Polarimetry, Optical components

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Proceedings Article | 12 July 2019 Open Access

Validation of a spatial light modulator for space applications

Manuel Silva-López, Antonio Campos-Jara, Alberto Álvarez-Herrero

Proceedings Volume 11180, 111806R (2019) https://doi.org/10.1117/12.2536162

KEYWORDS: Liquid crystal on silicon, Liquid crystals, Mirrors, Modulators, Head, Aerospace engineering, Phase modulation, Calibration, Wavefronts, Phase shifting

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Liquid crystals on silicon spatial light modulator (LCOS-SLM) combine the potential of reflection type spatial light modulators with the compactness and robustness of a single chip. They are used today for beam steering applications, optical beam shaping and laser processing. These devices have a high potential for space applications due to the fact that they allow to introduce any tailored wavefront distortion in an imaging instrument. Then, image reconstruction methods as phase diversity can be used to determine the Point Spread Function (PSF) inflight and, later, to introduce a corrective wavefront distortion to correct possible deviations of the expected optical quality.

Among other aberrations, the beam phase control can act on the level of focus. In space optical applications image refocusing is usually performed by means of mechanisms, either by using linear displacement of lenses or rotating wheels with plates with different thicknesses. The compactness and absence of mechanical parts of LCOS-SLM can be of great advantage for these applications. LCOS-SLM can save complexity and weight. It also reduces the risk associated to the wear of moving parts.

However, this technology has not been qualified for space applications. Liquid crystal leaks as well as outgassing issues may result as a consequence of a low pressure environment. Thermal issues can also result in loss of device homogeneity and the radiation tolerance should be analyzed. In any case, an exhaustive space simulation test is mandatory to increase the Technological Readiness Level of these devices for their use in space systems.

In our work we are showing preliminary test of a commercial LCOS-SLM under thermo-vacuum conditions. These tests are basic calibrations used to evaluate performance and degradation in a simulated space environment. Different calibration procedures are also discussed. This technology, with potential to greatly simplify an instrument design, was included in a proposal for the instrument IMaX+ spectro-polarimeter, to be onboard the mission Sunrise III, within the NASA Long Duration Balloon program.

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