The ornamental design for an opticalaimingdevice, as shown and described.
FIG. 1 is a top perspective view of an optical aiming device showing my new design;
FIG. 2 is a front side view thereof;
FIG. 3 is a back side view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a top view thereof; and,
FIG. 8 is a top perspective view thereof.
The broken lines depict portions of the optical aiming device that form no part of the claimed design. The broken lines in FIG. 8 that depict the environment of a mount forms no part of the claimed design.