ZOOM LENS DRIVE Russian patent published in 2005 - IPC

FIELD: optics.

SUBSTANCE: the zoom lens drive has a step-by-step motor coupled through a reduction gear to a cylinder cam with shaped grooves on the generating line, two carriages kinematically linked with the cam, control unit with a master oscillator, whose output is connected to the information input of the frequency divider and a coefficient producer. The coefficient producer has a binary counter and a storage. The information input of the binary counter is connected to the output of the frequency divider, and the output - to the address input of the memory, the coefficient assignment output and whose count permission output respectively are connected to the input of coefficient setting and input count assignment of the frequency divider. The drive is provided with multiplexer having a trajectory setting input, whose information inputs are connected to the information outputs of the memory, and the output - with four windings of the step-by-step motor.

EFFECT: expanded range of the speeds of movement of the optical component of the zoom lens drive.

2 dwg