File:Laser-Doppler.jpg
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Summary
| Description |
English: 2D-Laser Doppler Velocimeter at a flow channel. Two pairs of laser beams, slightly different in color/wavelength, for measuring the longitudinal and vertical component of the flow velocity at the point of intersection. The object lens is fiber-optically coupled to the laser system (not shown) facilitating scanning movements of the object lens together with the mechanically connected detector at the opposite side of the flow channel. The air inside and outside the channel is loaden with smoke to show the beams (note the apparent break where the beams pass through the wall of the channel).
Deutsch: 2D-Laser-Doppler-Anemometer an einem Strömungskanal. Zwei Strahlpaare leicht unterschiedlicher Farbe/Wellenlänge dienen der Messung der Längs- bzw. vertikalen Komponente der Strömungsgeschwindigkeit am Ort des Schnittpunkts. Das Objektiv ist mit dem nicht gezeigten Lasersystem durch Lichtleiter verbunden. Das erleichtert scannende Bewegungen des Objektivs zusammen mit dem damit verbundenen Detektor auf der anderen Seite des Strömungskanals. Die Luft, auch im Kanal, ist rauchgeschwängert, um die Laserstrahlen sichtbar zu machen (siehe die scheinbare Lücke beim Durchtritt der Strahlen durch die seitliche Wand des Kanals). |
| Date | |
| Source | http://ails.arc.nasa.gov/ails/printPreview.php?rid=1147 |
| Author | NASA/Ames Research Center |
| Other versions | The original image has been reduced to half the resolution and clipped. |
Licensing
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This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.) |  |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:27, 1 August 2010 | | 938 × 619 (254 KB) | Rainald62 | {{Information |Description={{en|1=2D-Laser Doppler Velocimeter at a flow channel. Two pairs of laser beams, slightly different in color/wavelength, for measuring the longitudinal and vertical component of the flow velocity at the point of intersection. Th |
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