Welding the rotor to the outputting member at the magnetic pole boundary suppresses characteristic degradation while ensuring positional accuracy.
Non-circular apertures maximize lens area within thin device constraints.
Adjusting coil current synchronizes blade run-up periods to stabilize exposure time against temperature fluctuations.
Replacing driving springs with a motor, decelerator, and position detectors enables precise curtain speed control while reducing mechanical complexity.
A rotary aperture mechanism uses electromagnetic force to rotate blades, resolving the trade-off between precise light control and device thickness.