| 1. | 50 years of laser research at Onera - Zoom in the Lab |
| | But if a very intense and very brief laser beam is sent toward the fog, a sufficient quantity of photons return directly to the sender.... These vortices are studied using Lidars, a technology based on the transmission of a laser beam and the analysis of the luminous radiation sent back by the milieu being studied1. " The progress made in the visualization of these vortices is staggering " emphasizes Emmanual Rosencher.... |
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| 2. | High Resolution Imaging - ONERA / DOTA |
| | Examples of projects and specialized activitiesComete, laser beam focusing. Lola, Earth-satellite laser telecommunications. |
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| 3. | NAOS - Nasmyth Adaptive Optics System |
| | Focusing Laser Beams... Focusing very precisely a powerful laser beam on a target is obviously useful in a military perspective.... Thermonuclear fusion thanks to a very high power laser beam (so-called " megajoule laser ") makes it necessary to focuse rays as precisely as possible.... |
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| 4. | Tunable Diode Laser Absorption Spectroscopy (TDLAS) applied to hypersonic wind tunnels - ONERA / DMPH-EN |
| | The laser beam crosses the flow with a small angle (60 °) to the flow axis (Figure 1), in order to make a Doppler shift appear in the position of the absorption lines.... This technique provides only integrated or average measurements realised on the path of the laser beam.... |
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| 5. | Hypersonic Shock Wave in Martian Atmosphere - ONERA's Science Pictures |
| | Laser beam fluorescence suits to the low densities involved in hypersonic flow.... |
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