Massive, dentated lens, has dentated region, provided on smooth external surface, providing high light concentration up to calculated focal length with respect to lens center

摘要

The lens has a smooth external surface with a dentated region. The dentated region provides high light concentration up to calculated focal lengths with respect to the lens center. Both external surface and dentated region may assume curved, warped, flat, spherical, cylindrical, circular, elliptical, or longitudinally extending shapes.