TECHNICAL FIELD

The present invention relates to an optical device and a driving control method thereof, and more particularly, to an optical device including at least two moving groups sharing moving regions with each other and a driving control method thereof.

BACKGROUND ART

Recently, demands for miniaturization and high optical performance of image capturing devices, such as digital cameras, video cameras, and surveillance cameras, are increasing.

From among such image capturing devices, a zoom lens system included in an image capturing device having a zoom function includes a plurality of moving groups movable to perform zooming, and, during a zooming operation, the plurality of moving groups move along the optical axis based on information about positions according to zooming positions pre-stored in memory as data.

However, when a plurality of moving groups are included in a small image capturing device, the plurality of moving groups may interfere with one another during movements.

DESCRIPTION OF EMBODIMENTS

Technical Problem

One or more embodiments of the present invention provides an optical device capable of controlling two or more moving groups sharing moving regions with one another from colliding with one another and a driving control method for the optical device.

Solution to Problem

According to an aspect of the present invention, there is provided an optical device including an optics movable along an optical axis and including at least two moving groups that share portions of driving regions; a plurality of actuators configured to move the at least two moving groups along the optical axis, respectively; and a control unit configured to control the positions of the at least two moving groups by operating the actuators, wherein the control unit moves the at least two moving groups independently, such that the position coordinates of the at least two moving groups in one integrated coordinates system do not coincide with each other.

According to another aspect of the present invention, there is provided a driving control method of optical device, which includes an optics movable along an optical axis and including at least two moving groups that share portions of driving regions; a plurality of actuators configured to move the at least two moving groups along the optical axis, respectively; and a control unit configured to control the positions of the at least two moving groups by operating the actuators, the driving control method including calculating a relationship formula between position coordinates of the at least two moving groups in one integrated coordinates system; and moving each of the at least two moving groups by using the control unit, such that the position coordinates of the at least two moving groups do not coincide with each other.

Advantageous Effects of Disclosure

According to an embodiment of the present invention as described above, an optical device including at least two moving groups may be designed, such that moving regions of the moving groups are shared with one another for miniaturization of the optical device and a driving control method for the optical device may be provided.

Also, an optical device capable of preventing moving groups sharing moving regions with each other from colliding with each other during movements by integrating coordinates systems of the moving groups and a driving control method for the optical device may be provided.

