Photonic Doppler velocimetry lens array probe incorporating stereo imaging

摘要

A probe including a multiple lens array is disclosed to measure velocity distribution of a moving surface along many lines of sight. Laser light, directed to the moving surface is reflected back from the surface and is Doppler shifted, collected into the array, and then directed to detection equipment through optic fibers. The received light is mixed with reference laser light and using photonic Doppler velocimetry, a continuous time record of the surface movement is obtained. An array of single-mode optical fibers provides an optic signal to the multiple lens array. Numerous fibers in a fiber array project numerous rays to establish many measurement points at numerous different locations. One or more lens groups may be replaced with imaging lenses so a stereo image of the moving surface can be recorded. Imaging a portion of the surface during initial travel can determine whether the surface is breaking up.

主权项

1. A photonic Doppler velocimetry probe comprising
a housing defining an interior space between a first end and a second end; one or more optic signal conductors entering the housing through the second end and terminating within the interior space of the housing, the one or more optic signal conductors configured to provide one or more optic signals to one or more lenses in the probe; a ferrule, located within the housing, having one or more passages configured to receive and secure at least one of the one or more optic signal conductors to the ferrule; an first lens adjacent the ferrule to receive the optic signal, the optic signal traveling in a first direction; one or more additional lenses adjacent the first lens configured to direct the optic signal; a prism, mounted at the first end of the probe, the prism configured to receive the optic signal from the one or more additional lenses and reflect the optic signal outward in a second direction, the second direction being different than the first direction.