Instrumentation Laser Optique Appliquée Rapide

Rendre Visible l'Invisible, Imagerie rapide et techniques de visualisation, Capture de mouvement – Seeing the Invisible High speed imaging and visualisation techniques, Motion capture – IMT Mines Alès LGI2P I3A Euromov DHM

Acquisition Rapide d’images – HSI

Depuis 2005, nous réalisons des essais en acquisition rapide d’images notamment sur des explosions, des ruptures fragiles ou de l’expansion brusque de fluides. Nous avons la possibilité d’enregistrer à très haute fréquences grâce à des capteurs comme la Photron SA3 qui permet 2000images/seconde pour 1Mpixels et la Phantom V711 (7530fr/s, 1MPixel) ainsi que la V2512 (26000fr/s, 1MPixel).
Ces systèmes sont couplés à de l’éclairage tels que des lasers pulsés (527nm 1000Hz – 15mJ, 532nm 15Hz – 250mJ) ou continus (532nm, 2W), des spots HMI de 2KW puissance ou des LED blanches superluminescentes…18000lumens.
 
Since 2005 we are dealing with high speed imaging for different kind of applications such as explosions, brittle fracture, fluid expansion …
We have now the possibility to record at very high frame rates with sensors like Photron SA3 enabling 2000fr/s for 1Mpixels and Phantom V711 (7530fr/s, 1Mpixel) and also the V2512 (26000fr/s, 1Mpixel) .
These systems are coupled with different lighting such as double pulse lasers (527nm 1000Hz – 15mJ, 532nm 15Hz – 250mJ), continuous laser (532nm, 2W), white light 2kW HMI projectors or superlum white LEDs…18000 lumens.
Ejection brutale de liquide — Expanding liquid jet : ROI 8m*2m(Image Courtesy of CEA-Gramat, France)
tir15-com
Pour voir vite et de loin...
Just to see fast from far away…
 

SA3-Questar-platine

Et aussi avec une Phantom V711 (Grandissement 13µm/pixel à 91cm), couplée à Questar FR1MKIII
And also with Phantom V711 (Mag. 13µm/pixel, WD=91cm), coupled to Questar FR1MKIII

V711questar

Rupture d’une fibre de lin

Onde de souffle sur gouttes tombantes
Blast wave on falling droplets
bagbreakup
Mesure de vélocimétrie de particules par imagerie
PIV measurements after catastrophic breakup
pivdrops
Imagerie d’onde choc et calibration de capteur de surpression: camera PhantomV2512 168000fps et ombroscopie champ large (ROI 30cm*1.5cm)
Shockwave high speed imaging and calibration of overpressure sensor: Phantom V2512 camera, 168000fps, direct shadowgraphy (ROI 30cm*1.5cm)

Analyse d’un UVCE

Premiers instants d’un UVCE (ROI 6m*3m),  temps d’exposition 293ns, 20kfps
Very first instant of UVCE (Unconfined Vapour Cloud Explosion), 293ns exposure time, 20kfps

Santé
Cheers
Travaux pratiques d’éleves
Students practical exercises

[youtube]https://www.youtube.com/watch?v=kwbF_OpE0g8[/youtube]
verreau

[youtube]http://youtu.be/-p0-VSZ4DgE[/youtube]

Un Commentaire

  1. Paranormal Activity: What should I do? Today, my family and I
    left in the morning and didn’t come back until night time.
    When we arrived we observed our deadbolt was locked, but
    I was the last one out and I certainly didn’t lock it.
    The only method to lock it is with a key or from the within, but our
    back again door was locked and there were zero signs…
    show more Correction: You do not remember anyone locking the
    door, and your mother is usually 99.9% sure she left her t-shirt on the bed.
    There’s a siginificant difference between what people remember and what
    in fact happened. Appearance it up unless you trust me.
    You found a clothing that wasn’t where it had been supposed to be and a door
    that was locked that you don’t recall locking.
    It doesn’t count as paranormal, not in any book.
    That tale wouldn’t even curiosity those clowns from ‘reality’ Television, and they’ll believe anything from anyone
    with no questions asked. You understand the guys After
    all: They operate around in a van (but they’re not really Scooby Doo),
    listen to wild tales and say « let’s generate the team to check it out ».

    They set up camp, wait for sunset, and established all
    their digital cameras on green-o-vision setting (despite the fact that colour
    low-light technology has been available for decades).
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