Product category:
Form/co-ordinate, optical and vision instrumentation
News Release from: Specialised Imaging | Subject: Specialised Imaging Shadowgraph
Edited by the Engineeringtalk Editorial
Team on 06 September 2007
Camera aids aerodynamic study
Modern image sensors have allowed the design of cameras that will capture up to 11-million pixel images with the ability to shutter faster than 1us.
Specialised Imaging has released a digital shadowgraph, providing engineers with a tool for studying aerodynamics and flow mechanics The Specialised Imaging Shadowgraph (SIS) camera enables high-resolution imaging of ultra-fast events in ambient as well as low-light environments
This article was originally published on Engineeringtalk on 13 Jun 2008 at 8.00am (UK)
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Modern image sensors have allowed the design of cameras that will capture up to 11-million pixel images with the ability to shutter faster than 1us.
Integrating this camera with an ultra-fast high intensity spark source has resulted in a sophisticated Shadowgraph camera that is capable of image quality only previously achievable with film cameras.
It also offers the advantage of instantaneous access to the data.
Control software provides simple adjustment of imaging parameters and extensive measurement tools to accurately analyse results.
Camera stations can be arranged in the classic configuration looking directly at a reflective screen or as orthogonal pairs to provide valuable 3D data such as the pitch and yaw of supersonic airflows.
Comprehensive triggering functionality has been implemented in the SIS camera system, enabling it to be interfaced with almost any triggering device.
An in-built velocity trap, using optional external triggers, ensures the camera will never suffer from experimental uncertainty in measuring the velocity of an object.
A shadowgraph is an optical instrument that reveals nonuniformities in transparent media like air, water, or glass.
While a difference in temperature, a different gas, or a shock wave in a transparent medium cannot be directly seen, all these disturbances refract light rays, so they can cast shadows.
Applications of shadowgraphy in science and technology are very broad.
Shadowgraphy is used in aeronautical engineering to see the flow about high-speed aircraft and missiles, as well as in combustion research, ballistics, explosions, and in the testing of glass.
The technique is related to, but simpler than, Schleiren methods that perform a similar function.
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