Optical Device

FIG. 1 is a perspective view of an optical device showing our new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a right side elevation view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; FIG. 8 is another perspective view thereof; and, FIG. 9 is a perspective view showing the optical device in an environment of use. The broken lines shown represent environmental subject matter and form no part of the claimed design.