A lens system includes: a plurality of aligned lenses a first lens having negative refractive power a second lens having negative refractive power a third lens with positive refractive power and, a fourth lens with positive refractive power a light beam transmitted through the first, second, third and fourth lenses is first diverged by the first and second lenses, collimated by the third lens and focused by the fourth lens to form a small spot at the focal plane.
