"There is a new (at least to me) motor out there called Squiggle. It is really small, and looks like it has already seen application in some camera focusing applications. It can be operated closed loop or open loop from what I can tell. Check out…"
"Going back through my notes on lenses for video cameras, I see that the linear feedback potentiometer was mechanically related to the zoom lense position. The focus lense was mechanically linked to the zoom lense through spiral grooves in the…"
"The older ones used a linear potentiometer. The newer ones eliminated the encoder and used a stepping motor. Coarse focus was achieved by automatically calibrating the focus lense position to the zoom setting, zoom also done with a stepping motor.…"
I am looking for different types of encoders for closed-loop control of motors for use in miniature autofocus cameras. The encoder can be either rotary or linear. An ideal would be some sort of resolver or absolute encoder.Thanks.See More