As I said, some control.
Chuck Norcutt
Mark Marr-Lyon wrote:
> Yes, but it doesn't move it as a single unit. Ultrasonic means it's
> moving at more than 20kHz, and probably more like a couple hundred
> kilohertz if not higher. I would think that several wavelengths would
> have to fit across the sensor/glass in order to be effective at moving
> dust, so some parts of the glass are moving in the opposite direction
> as other parts at any given time. I would also guess that it chirps
> the driving frequency to avoid standing waves and the dust collecting
> at the velocity nodes on the plate (Chladni patterns).
>
> To do anti-shake by moving the sensor, a much lower frequency and
> larger amplitude motion system is needed.
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