Digital Holographic Interferometry in the Long-Wave Infrared Range for Measuring Large Deformations of Space Components under Thermal-Vacuum Testing

Holographic interferometry at around 10 µm wavelengths has many advantages. It offers the possibility of large deformation measurement, while being much less sensitive to external perturbations. We present the state-of-the art of this technique applied to several industrial cases of the space industry. In particular, we demonstrate that the technique is well adapted to measurement of full-field deformation maps of space structures undergoing large temperature variations typical to what they experience in space conditions.

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Thermal-vacuum testing of drilling and sampling tool

10.2514/6.2000-5272 ◽

2000 ◽

Author(s):

M. Marchesi ◽

R. Campaci ◽

A. Nista ◽

W. Prendin ◽

S. Scarpa ◽

...

Keyword(s):

Thermal Vacuum ◽

Vacuum Testing

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Digital Holographic Interferometry in the Long-Wave Infrared for the Testing of Large Aspheric Space Reflectors

Fringe 2013 ◽

10.1007/978-3-642-36359-7_173 ◽

2014 ◽

pp. 921-924

Author(s):

Jean-François Vandenrijt ◽

Cédric Thizy ◽

Yvan Stockman ◽

Patrick Queeckers ◽

Frank Dubois ◽

...

Keyword(s):

Holographic Interferometry ◽

Long Wave ◽

Long Wave Infrared

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Mathematical simulation of heat transfer in spacecraft

Journal of «Almaz – Antey» Air and Defence Corporation ◽

10.38013/2542-0542-2017-2-61-78 ◽

2017 ◽

pp. 61-78

Author(s):

A. G. Vikulov

Keyword(s):

Heat Transfer ◽

Mathematical Models ◽

Mathematical Simulation ◽

Accuracy Evaluation ◽

Identification Problems ◽

Thermal Vacuum ◽

Ground Testing ◽

Scientific Approach ◽

Thermal Calculations ◽

Vacuum Testing

We implemented a systemic scientific approach to thermal vacuum development of spacecraft, which integrates the problems of thermal calculations, thermal vacuum tests and accuracy evaluation for mathematical models of heat transfer by means of solving identification problems. As a result, the following factors increase the efficiency of spacecraft ground testing: reducing the duration of thermal vacuum tests, making autonomous thermal vacuum testing of components possible, increasing the accuracy of thermal calculations

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Deflectometry-based thermal vacuum testing for a pneumatic terahertz antenna

Astronomical Optics: Design, Manufacture, and Test of Space and Ground Systems III ◽

10.1117/12.2594902 ◽

2021 ◽

Author(s):

Henry Quach ◽

Marcos A. Esparza ◽

Hyukmo Kang ◽

Aman Chandra ◽

Heejoo Choi ◽

...

Keyword(s):

Thermal Vacuum ◽

Terahertz Antenna ◽

Vacuum Testing

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FULL FIELD MAPPING OF TRANSIENT SURFACE ACOUSTIC WAVES USING HETERODYNE HOLOGRAPHIC INTERFEROMETRY

Ultrasonics International 87 ◽

10.1016/b978-0-408-02348-1.50029-9 ◽

1987 ◽

pp. 159-164 ◽

Cited By ~ 4

Author(s):

James W. Wagner

Keyword(s):

Holographic Interferometry ◽

Acoustic Waves ◽

Surface Acoustic Waves ◽

Full Field ◽

Field Mapping

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Thermal tuning capabilities of semiconductor metasurface resonators

Nanophotonics ◽

10.1515/nanoph-2018-0178 ◽

2018 ◽

Vol 8 (2) ◽

pp. 331-338 ◽

Cited By ~ 10

Author(s):

Tomer Lewi ◽

Nikita A. Butakov ◽

Jon A. Schuller

Keyword(s):

Optical Switching ◽

Near Infrared ◽

Large Temperature ◽

Infrared Range ◽

Thermal Excitation ◽

Optical Elements ◽

Silicon And Germanium ◽

Phase Amplitude ◽

External Stimuli ◽

Thermal Tuning

AbstractMetasurfaces exploit optical phase, amplitude, and polarization engineering at subwavelength dimensions to achieve unprecedented control of light. The realization of all dielectric metasurfaces has led to low-loss flat optical elements with functionalities that cannot be achieved with metal elements. However, to reach their ultimate potential, metasurfaces must move beyond static operation and incorporate active tunability and reconfigurable functions. The central challenge is achieving large tunability in subwavelength resonator elements, which requires large optical effects in response to external stimuli. Here we study the thermal tunability of high-index silicon and germanium semiconductor resonators over a large temperature range. We demonstrate thermal tuning of Mie resonances due to the normal positive thermo-optic effect (dn/dT>0) over a wide infrared range. We show that at higher temperatures and longer wavelengths, the sign of the thermo-optic coefficient is reversed, culminating in a negative induced index due to thermal excitation of free carriers. We also demonstrate the tuning of high-order Mie resonances by several linewidths with a temperature swing of ΔT<100 K. Finally, we exploit the large near-infrared thermo-optic coefficient in Si metasurfaces to realize optical switching and tunable metafilters.

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