| 摘要 |
This invention relates to a novel prescription lens (58), mainly suited for ophthalmic applications. The lens designer defines the macroscopic surface of the lens (59, 60) as desired. The design process assumes that the location of the object (50), the lens (51), and the required image (53) are known. By using Ray-tracing technique we calculate the macroscopic normals to the lens that will form the required image. From those macroscopic normals we calculate the macroscopic surface by a process of summation of the slopes with geometric pattern conditions. The final surface is not smooth but contains plenty of dense macroscopic shapes that look like saw-teeth. The rough surface enables the lens to have almost any desired shape and thickness.
|
