| 摘要 |
The device for calibrating an image motion compensation aerial camera includes a pair of transparent scales formed on an enclosure having two light tight compartments, one for each scale. Each compartment contains a flash lamp which is energized at specifically spaced intervals determined by a one-shot multivibrator. During a test, the camera photographs a superposition of the two scales while the film is in motion. The amount of displacement between the photographed scales will indicate the velocity of the film.
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