Abstract. By numerical simulations, it has been shown that a conventional
cylindrical rod can be used as a hollow conic beam generator by
illuminating a parallel laser beam inclined to the axis of the rod. Half of
the conic beam is formed by the reflection at the surface of the cylindrical
rod, and the opposite side of the conic beam by its transmission. We
discuss the parameters to determine the size of the conic beam and the
effect of the dielectric multilayer coating on the intensity distribution of
the conic beam. The line beams of the shapes such as circle, ellipse,
parabola, or hyperbola can be generated by this hollow conic beam generator,
depending on the position and orientation of the observing
plane