1 Introduction
2 Reference-free digital shadowgraphy
3 Setup
Value | Meaning |
---|---|
22 | F# for depth of field purposes |
\(f=200\,\hbox {mm}\) | Lens focal length |
24 Hz | Image frequency |
\(140^\circ \) | Temperature of heated air jet |
Veo 640L | Camera |
\(2560 \times 1600\) px | Camera resolution |
800 µs | Camera framing time |
\(z_A=1440\,\hbox {mm}\) | Camera-object distance |
\(z_D=880\,\hbox {mm}\) | Object-background distance |
9.4 px/mm | Camera resolution |
1.25 mm/12 px | Minimum resolvable object due to unsharpness |
8 px | Background movement between images |