• Particle size can be between 100 and 25,000 μm • Particle speeds up to 200 m/s • Particle types can be dust and snow particles, as well as water drops (possible mixed phase conditions) • Provide 3D X, Y, and Z locations of the particle positions within the instrument’s field of view to within 100 um • Provide 3D images of droplets ice crystals • Instrumentation must withstand pressure range from 0.01 to 15 psia • Instrumentation must withstand high humidity • Instrumentation must withstand temperature range from 30 to 95oF • Provide remote control of the imaging system and image acquisition • Record images for 2 to 3 minutes at greater than 100 fps • CMOS digital camera with 4200 by 2160 pixels (9 Mpix) • Pixel size 2.5 X 2.5 m • Particle shadow Image depth quantization 256 gray levels • Field of View 130 mm by 60 mm • Working distance – front of optics enclosure to particle field – 300mm • Airtight ruggedized camera enclosure • LED Light Panel illumination, 256 LED’s, 250 mm by 110 mm, wavelengths blue and red, airtight enclosure, pulses durations as short as 100 ns. • Airtight ruggedized enclosure • Electronics and software control system of illumination intensity and pulse durations • Trigger system to synchronize with ice cloud release • Electronics to provide 8 modes of operation: o Free running o Camera mode – TTL signal generated by camera o External mode – allows synchronizing camera with ice cloud release o Camera mode with delay – camera TTL signal delayed by selectable amount o External mode with delay – pulse from release of sample is delayed by selectable amount o Double pulse mode – software selectable pulse separation for PTV particle velocity measurements o Trigger mode – imaging pulse is generated when a particle is detected • System control software for complete remote controlled automated setup of the system parameter • Automated LED illumination control software • Image processing software to detect and validate particle images, merge orthogonal images into 3D space, resolve 3D particle images
