This project was meant to produce an ultra-low cost PTV system (less than $1000 CAD), for use in teaching, training in the use or theory of PTV, or small projects. The imaging system consists a Raspberry Pi and a quadrascopic Arducam array, which are mounted to a 3D printed backplate. The fixed camera angles are meant to focus on a control volume approximately 30cm away. Using the Raspberry Pi as a webcam host, images can be streamed (4x1MP) at approximately 100Hz to a host laptop.
The light source is a commercial 50 watt LED, which is mounted to an approximate parabolic reflector for collimation. Collimation is far from perfect, and the LED is by no means a point source. However, for the purpose of concentrating available light, and limiting control volume edges, the system was found to be sufficient relatively close to the light source (under about 50cm).
Software and instructions may be shared at a later date.
Jaime Wong 
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