OPTICAL SYSTEM AND LASER IRRADIATING APPARATUS

摘要

PROBLEM TO BE SOLVED: To reduce the aberration of a spherical lens and to uniformize the energy distribution of a linear laser. SOLUTION: The cylindrical lens is divided by the plane parallel to the generatrix and the optical axis. By changing the height from the irradiated surface of the divided individual lens, the difference in the focal length in the lens is corrected to decrease the aberration. The energy distribution of the linear laser thereby becomes uniform. The method is used also not only as the linear laser optical system but as a method of reducing the aberrations of the lens.