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.

Plus récemment, nous avons pu essayer la Phantom TMX7510, qui permet, grâce à sa technologie CMOS BSI (back side illuminated), d’atteindre des temps d’exposition aussi courts que 95ns, et des fréquence de capture jusqu’à 1.7Mfps avec le binning des ses pixels de 18.5µm.

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.

More recently, we tried the Phantom TMX7510, allowing to reach up to 1.7Mfps thanks to BSI CMOS with 18.5µm pixels binning.

Basics

Examples

Onde de souffle sur gouttes tombantes (double pulse)
Blast wave on falling droplets

Chemical products dispersion in water: drolet rising in the water column (CEDRE, IMT Mines Alès)

Simple backlight imaging of one drop

Collimated backlight imaging of one drop

Collimated backlight imaging of drops cluster

Time resolved Digital Holographic Interferometry: noise compensated phase variation of droplet rising , 1000fps

Shockwave characterization

Impact Hyperveloce

bille inox et stockage de gaz (CNES, CEA Gramat, IMT Mines Alès)

Travaux pratiques d’éleves  – Students practical exercises

Droptest on natural fibers reinforced composites plates

Automatic analysis of crack propagation after high speed recording of drop test impact (from the bottom view)

TMX7510 (sept 2021)

TMX7510 Digital image correlation raw images : Drop test, 3 points bending, 1280*800@76kfps

From Phantom

The Phantom TMX 7510 is the world’s first high-speed camera to utilize back side illumination. Implementing this technology has allowed Vision Research engineers to develop a custom sensor capable of unprecedented speeds without sacrificing the image quality that Phantom cameras are known for. 

BSI technology provides increased processing efficiency, allowing TMX cameras to maintain their high throughput levels even as frame rates increase. The TMX 7510 has 75 Gigapixel throughput which can provide over 76,000 fps at a full 1 Mpx resolution of 1280 x 800.  At reduced resolutions the camera will record at over 770,000 fps in standard mode and up to 1.75M fps and 95ns in with the FAST mode.  For an in-depth look at how this technology has revolutionized high-speed imaging read our whitepaper on BSI Sensor Technology.