| 摘要 |
A design method for an optical curved surface, includes: dividing an optical curved surface into a plurality of rectangular areas that are divided by a lattice; defining an original lattice point on the lattice, a backbone line that crosses the original lattice point on the lattice, and standard lattice points that are the lattice points located on the backbone line except the original lattice point; applying curvatures to all of the lattice points; applying inclinations to the original lattice point and the standard lattice points; applying sag to the original lattice; calculating a sectional shape of the curved surface along the backbone line based on the sag and inclination of the original lattice point and the curvatures of the lattice points on the backbone line; calculating sags of the standard lattice points based on the calculated sectional shape; calculating sectional shapes along orthogonal lines that are orthogonal to the backbone line based on the calculated sags and the applied inclinations of the standard lattice points and the applied curvatures of the lattice points on the orthogonal lines; and representing the rectangular areas as mathematical functions respectively based on the calculated sectional shapes.
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