Figure 4
Time-resolved radiography of a moving saw blade. Each panel in this composite is a 14 × 91 pixel illuminated portion of a frame. Each panel shows a portion of three saw teeth (dark shadows pointing up in these images) partially occluding a 1.7 × 12 mm2 monochromatic synchrotron beam (8.9 keV). Shown are three sets of three panels (A1–A3, B1–B3 and C1–C3), each set being the first three frames of the eight recorded in the PAD using a given integration time and interframe delay. Panels A1–A3: 5 µs integration time with 1 µs interframe delay. Exposure A2 begins 6 µs after the beginning of A1. Panels B1–B3: 5 µs integration time with 5 µs interframe delay. Panels C1–C3: 5 µs integration time with 30 µs interframe delay. Blade rotation was 5000 r.p.m. in all frames corresponding to a saw tooth speed of 48 m s−1. Tooth spacing was 3 mm. X-ray flux was 2000 X-rays µs−1 pixel−1. No uniformity (flat field) correction has been applied. |