Method of determining optical parameters of an opthalmic lens

• Main Authors: CHAUVEAU JEAN-PIERRE, ALLIONE PASCAL, STEIGELMAN DANIEL
• Format: Patent
• Language: English
• Published: 15.07.2015
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

Method for determining the values of a set of n optical parameters (P1, P2,..., Pn) of an ophthalmic lens, n being an integer greater than or equal to 1, the method comprising: - an nominal ophthalmic lens data providing step, - an ophthalmic lens providing step, - an optical surface measuring step, - a surface errors determining step during which a set of m surface error parameters ([alpha]1, [alpha]2,..., [alpha]m) is determined, m being an integer greater than or equal to 1, - an optical parameter determining step during which each optical parameter of the set of optical parameters is determined by: (I) with Pi the value of the ith optical parameter of the manufactured optical lens, Pi,0 the value of the ith optical parameter of the nominal optical lens (II), the value of the derivative of Pi with respect to the jth surface error parameter [alpha]j on the nominal surface and [delta][alpha]j the value of the jth surface error parameter, and Ai a combination of terms of order greater or equal to 2 for each Pi.