Abstract: The present invention relates to a device for controlling a multi-axial point tilt of a camera lens and a method therefor, characterized by controlling a camera lens to move within a common stroke section among respective stroke sections in which the camera lens can move in an axis direction (z-axis) parallel to an optical axis direction at each of three or more axial points, wherein the camera lens is moved to a target position by using a compensation factor that is compensated such that a lens movement distance for each control code is the same.

Abstract: The present invention relates to a device for controlling a multi-axial point tilt of a camera lens and a method therefor, characterized by controlling a camera lens to move within a common stroke section among respective stroke sections in which the camera lens can move in an axis direction (z-axis) parallel to an optical axis direction at each of three or more axial points, wherein the camera lens is moved to a target position by using a compensation factor that is compensated such that a lens movement distance for each control code is the same.

Abstract: An apparatus for measuring six-degree-of-freedom motions by using three-facet reflector, the six-degree-of-freedom motions of an object being measured by using the laser beam proceeding from a laser light source, comprising: a multiple facet reflector in the form of a trigonal pyramid, the multiple facet reflector being fixed on the object for measurement and able to reflect the laser beam in three directions; three position-sensitive detectors for measuring the position and intensity of the laser light points formed on their surfaces, with the movement of the multiple facet reflector, and then providing output signals; and a controlling section for analyzing six-degree-of-freedom motions of the multiple facet reflector by using the position and intensity of the laser light points output from the three position-sensitive detectors. (FIG. 4).

Abstract: The present invention relates to a apparatus for measuring 6-degree-of-freedom motions of a rigid body by using a three-facet mirror wherein the measurement of the 6-degree-of-freedom displacements of an object, particularly an object in motion with a high-speed, can be made with ease and with accuracy, and specially the measuring precision is excellent.

Abstract: A 6 degree-of-freedom (DOF) motion measuring apparatus using a multidirectional reflector, and a swing arm type optical system using the 6-DOF motion measuring apparatus to measure the 6-DOF motion of a slider in a hard disc drive (HDD) are provided. The 6-DOF motion measuring apparatus includes: a multidirectional reflector having at least three reflecting sides by which the laser beam is slit and reflected in three directions, the multidirectional reflector being provided to the object whose motion is to be measured; three position-sensitive detectors for receiving three sub-laser beams reflected from the multidirectional reflector; and a controller for calculating the 6-DOF motion of the multidirectional reflector using the intensity distributions of the three sub-laser beams received by the three position sensitive detectors assuming that the laser beam before reflection has a Gaussian intensity distribution.

Abstract: A 6 degree-of-freedom (DOF) motion measuring apparatus using a multidirectional reflector, and a swing arm type optical system using the 6-DOF motion measuring apparatus to measure the 6-DOF motion of a slider in a hard disc drive (HDD) are provided. The 6-DOF motion measuring apparatus includes: a multidirectional reflector having at least three reflecting sides by which the laser beam is slit and reflected in three directions, the multidirectional reflector being provided to the object whose motion is to be measured; three position-sensitive detectors for receiving three sub-laser beams reflected from the multidirectional reflector; and a controller for calculating the 6-DOF motion of the multidirectional reflector using the intensity distributions of the three sub-laser beams received by the three position sensitive detectors assuming that the laser beam before reflection has a Gaussian intensity distribution.