I claim the ornamental design for a handheld optical transmission-conversion device for producing a magnified image, as shown and described.
FIG. 1 is a perspective view of a handheld optical transmission-conversion device for producing a magnified image according to the present invention, illustrating a handle in an extended position, the handle movable over a range of travel between the extended position and a stowed position.
FIG. 2 is a right side elevational view of the handheld optical transmission-conversion device for producing a magnified image of FIG. 1, illustrating the movable handle in the stowed position shown at an enlarged scale.
FIG. 3 is a left side elevational view of the handheld optical transmission-conversion device for producing a magnified image of FIG. 1, illustrating the movable handle in the stowed position shown at an enlarged scale.
FIG. 4 is a front elevational view of the handheld optical transmission-conversion device for producing a magnified image of FIG. 1, illustrating the movable handle in the stowed position shown at an enlarged scale.
FIG. 5 is a top plan view of the handheld optical transmission-conversion device for producing a magnified image of FIG. 1, illustrating the movable handle in the stowed position shown at an enlarged scale; and,
FIG. 6 is a bottom plan view of the handheld optical transmission-conversion device for producing a magnified image of FIG. 1, illustrating the movable handle in the extended position.
Features illustrated in broken lines in the Figures depict environmental structure only and form no part of the claimed design.