Optical system determination according to advanced criteria

摘要

A method implemented by computer means for calculating by optimization an optical system for example an ophthalmic lens according to at least one criterion among the following list consisting of: ocular deviation, object visual angular field in central vision, image visual angular field in central vision, pupil field ray deviation, object visual angular field in peripheral vision, image visual angular field in peripheral vision, prismatic deviation in peripheral vision, magnification in peripheral vision, lens volume, magnification of the eyes, temple shift, or a variation of preceding criteria.

主权项

1. A method for manufacturing an optical system comprising the steps of:
i. selecting at least one criterion from among the groups consisting of:
a central vision criteria group consisting of: ocular deviation, object visual angular field in central vision, image visual angular field in central vision, and a variation of preceding criteria;a peripheral vision criteria group consisting of: pupil field ray deviation, object visual angular field in peripheral vision, image visual angular field in peripheral vision, prismatic deviation in peripheral vision, magnification in peripheral vision, and a variation of preceding criteria; anda general criteria group consisting of: lens volume, magnification of the eyes, and temple shift; ii. for each criterion selected in step i.), defining:
an evaluation zone comprising one or several evaluation domains and a set of target values associated with said evaluation domains, if said criterion selected in step i.) belongs to the central or to the peripheral vision criteria groups, ora target value associated with said criterion selected in step i.), if said criterion belongs to the general criteria group; iii. selecting a starting optical system and defining a working optical system to be equal to the starting optical system, wherein the starting optical system and the working optical system are each defined by coefficients of equations of its surfaces, an index of glasses thereof, and positions of each surface relative to each other, and wherein each optical system comprises at least two optical surfaces of a same lens; iv. evaluating for the working optical system and for each criterion selected in step i.):
a set of criterion values associated with said evaluation domains selected in step ii.), if said criterion selected in step i.) belongs to the central or peripheral vision criteria groups, ora criterion value, if said criterion selected in step i.) belongs to the general criteria group; v. modifying at least coefficients of equations of the at least two optical surfaces of the working optical system to minimize a cost function considering target values and criterion values by repeating step iv.) until a stop criterion is satisfied, wherein the at least two optical surfaces comprise at least a front and a back surface; vi. calculating by optimization the optical system; and vii. surface machining at least one optical surface in accordance with said calculated optical system.