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Visilase Systems from Oxford Lasers offer high speed digital
imaging at speeds of up to
50 000 frames per second.
We use a range of lasers, including: Nd:YAG, diode and copper vapor lasers, and high speed CMOS cameras and CCD cameras.
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High Speed Digital Photography - slow motion photography
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Visilase systems from Oxford Lasers combine high speed cameras with pulsed lasers
to offer the most powerful imaging systems in the world of R & D. The short-pulse lasers
enhance camera performance by illuminating subjects with ultra-short pulses of light.
Image blur is eliminated, even for subjects moving at high velocity. Laser light can be formed
into a sheet (known as a lightsheet) to take a 2D slice through a turbulent 3D flow, for flow visualization
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Capturing a moment in time: why use a pulsed
(strobe) laser for high speed photography? |
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Both images were taken using the same spray
subject, and the same high speed camera. For the upper
movie a conventional, continuous lightsource was used.
Even though the exposure time was only 1/4,500 second,
there is motion blurring in the movie.
The lower movie was taken using laser strobe
illumination from an Oxford Lasers copper vapor laser
(CVL). The short pulse from the laser reduces the effective
exposure time to 1/40,000,000 of a second (25 ns), and
even the smallest droplets in the spray can be seen clearly
- frozen in flight.
The same technique can freeze bullets in
flight. For a free demonstration CD with many more examples
at much higher resolution than the web allows, please
Contact Us.
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Applications of High Speed Imaging
Thousands of researchers around the world have used VisiLase systems from Oxford Lasers for insight into their studies.
Here are a few of the applications they have worked on:
- Automotive Development - imaging fuel injection, engine airflows and airbag deployment
- Slow motion photography of the natural world from understanding river erosion to unraveling the mysteries
of the flight of fruit flies
- Studies of sprays and aerosols form metered dose inhalers to hairsprays.
- Ballistics
- High speed Schlieren photography
- Extensions to PIV, sizing, and viewing through flames, arcs and explosions
- Shock wave propagation and interaction studies
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Lightsheets
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Laser light can be formed into a thin sheet
of light, which can be used to take a 2D slice through a 3D flow. The example
on the right shows the turbulent spray cloud from a pulmonary drug delivery
device, as it slows in a spacer device.
Oxford Lasers has developed a unique fiber-optic
delivered lightsheet - the FiberSheet, which can be used with
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copper vapor lasers
and diode-pumped solid state lasers. The FiberSheet gives 6 times higher quality
lightsheets than can be achieved in any other way.
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High Speed Imaging Systems:
Product selection matrix
We offer complete systems (see below) and components such as
lasers, cameras,
and beam steering and forming optics (see "For more information" on this page). Other configurations are available
- for more information Contact Us.
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System
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Max. Speed (frames/sec)
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Comments
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VisiLase Pro
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500 - 5000
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Entry level systems. 1 microsecond exposure time.
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VisiLase Max
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50 000
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Sate of the art CMOS digital camera with copper vapour laser. 25 ns exposure time
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VisiLase/i> HR 50
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50 000
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Uses film camera. Maximum possible combination of speed and resolution,
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For more information
Download Product Datasheet for:
Lasers
Accessories
Download Application Brief on:
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Other Applications / Areas of Expertise:
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Automotive Applications:
- Engine airflows (in cylinder)
- Combustion
- Fuel Sprays
- Airbag deployment
- Racing car aerodynamics
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Biological Applications:
- Animal motion - fruit flies
- Haemodynamics / blood flows
- Imaging a human sneeze
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Impact / Projectile studies:
- Droplet impact
- Ballistics
- Kinetic energy weapons
- Explosions
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Manufacturing:
- Polymer fiber production
- Optical fiber coating
- Textiles
- Paper mills
- Welding studies (arc welding and laser welding)
- Machining visualization
- Fluidised beds
- Manufacturing processes
- Spray driers
- In-pipe solid particles sizing
- Chocolate and sugar coating
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Energy Research:
- Spin=pit testing
- Boiling studies
- Nuclear reactors/li>
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Aeronautics & Hydrodynamics:
- Shockwaves
- Rocket fuel injectors
- Wind tunnel studies
- Pipeline research
- Wave formation
- Hydrodynamics & Magneto-hydrodynamics
- River erosion studies
- Cavitation studies
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Biological Applications:
- Animal motion - fruit flies
- Haemodynamics / blood flows
- Imaging a human sneeze
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Sprays:
- Fire Extinguisher sprays
- Plasma sprays
- MDI sprays
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Miscellaneous:
- Crystal Growth
- Holographic high-speed Imaging
- Schlieren Imaging
- Crack Propagation
- Paper Coatings
- Laser Lightshows
- Micro - reactors
- Fireworks
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