The invention provides a kind of sweep mechanism that is used for imaging probe, this imaging probe is used to utilize high-resolution imaging that mammalian tissues and structure are carried out imaging, and described imaging comprises high frequency ultrasound and/or optical coherence tomography.Imaging probe comprises the scalable rotary drive mechanism that is used for imposing on rotatablely moving image-forming assembly, and this image-forming assembly comprises optics or the acoustic sensor of emitted energy to the peripheral region.Image-forming assembly comprises the sweep mechanism with movable member, this movable member be configured to outside the described elongate hollow axle the path, transmit energy beam with the angle variable with respect to described longitudinal axis, thereby give the ability of image-forming assembly the place ahead and lateral observation.This movable member is that the mode of the function of image-forming assembly angular velocity is installed with described variable-angle.
