The ornamental design for a beamprojector, as shown and described.
FIG. 1 is a perspective view of a beam projector showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a reference view thereof showing an example of the usage of the subject design in a condition that the subject design is installed under the kitchen shelf; and,
FIG. 9 is a reference rear perspective view thereof showing the state that the left lens part of the subject design can he swivelled at an angle of 180 degrees.
The broken lines show unclaimed subject matter only and form no part of the claimed design.