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High-Resolution 3D Capture of High-Speed Objects

Paul S. Banks
Thu, 11/01/2012 - 15:27
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Most existing 3D capture technologies can’t be used to record objects in motion, and they usually require a stationary platform for operation. Some technologies can record 3D data at video rates (e.g., flash LADAR), but their spatial and range resolution are severely limited.

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TetraVue, a provider of 3D and optics solutions, is developing an alternative approach to flash laser detection and ranging (LADAR) that can record simultaneous intensity and range maps using standard, charge-coupled device (CCD) and complementary metal oxide semiconductor (CMOS) sensor arrays. This enables 3D imaging with megapixel-class, high-frame-rate sensors. The resulting 3D camera can be used in the same fashion as 2D camcorders, but it records the geometry and texture of all objects in the scene at frame rates of 1,000 fps and beyond. Testing has verified millimeter-class range resolution using a 2 megapixel (Mpx) sensor for objects moving at speeds up to 20 m/s (such as an operating floor fan). This testing illustrates the new kinds of applications that can benefit from 3D video capability, such as monitoring and measuring operating equipment and machinery, or detailed measurement of all aspects of high-speed events such as impacts.

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