Patent ID: 7419271

Claim:
A manufacturing method for a fine structure element, comprising: forming a flat portion on a substrate with a cutting section; forming a refractive surface having a predetermined angle with respect to the flat portion; forming the flat portion including: forming a first flat portion on the substrate with the cutting section, cutting the first flat portion by a predetermined depth to form a second flat portion, and forming a refractive surface with the cutting section, the refractive surface having a predetermined angle with respect to the second flat portion; forming a predetermined shape with the cutting section on a basis of machining data in a trial machining region different from the first flat portion; measuring the predetermined shape formed in the trial machining step; feeding back a difference between the measured predetermined shape and the machining data to correct the machining data; and forming the first flat portion, the second flat portion, and the refractive surface being performed on a basis of the corrected machining data.