Laser uniformly machining apparatus and method

A laser uniformly machining apparatus, comprising:

• a laser unit for providing a laser beam for machining;
• a first plano-convex lens for shaping the laser beam into an annular beam;
• a second plano-convex lens with a convex surface directly facing a convex surface of the first plano-convex lens for modifying a direction of the annular beam in accordance with a direction of an optical axis to turn the annular beam into a collimated annular beam, wherein the annular beam from the first plano-convex lens is directly into the second plano-convex lens;
• a third plano-convex lens and a fourth plano-convex lens with convex surfaces directly facing each other for adjusting the collimated annular beam in accordance with a scaling ratio to produce a scaled annular beam, wherein the second plano-convex lens directly faces the third plano-convex lens, and the collimated annular beam from the second plano-convex lens is directly into the third plano-convex lens, and the collimated annular beam after passing through the third plano-convex lens is directly into the fourth plano-convex lens;
• and
• a fifth plano-convex lens for focusing the scaled annular beam;
• wherein the scaled annular beam is directly to a plane surface of the fifth plano-convex lens to form a focused beam having a uniform distribution of light intensity in the direction of the optical axis, and the scaled annular beam after passing through the fourth plano-convex lens is directly into the fifth plano-convex lens.