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AssigneeEssilor International
InventorsStéphane BOUTINON, Philippe PINAULT
Estimating the term…
A device for measuring at least one camber geometrical characteristic of an ophthalmic lens provided on at least one of its faces with at least one position-identifying mark, the device including a support for the ophthalmic lens, and on opposite sides of the support, firstly lighting element for lighting the ophthalmic lens along at least two different lighting directions, and secondly acquisition and analysis element for acquiring and analyzing the light transmitted by the ophthalmic lens, the analysis element being adapted to identify shadows of the mark when lighted in the at least two lighting directions, and to deduce from their positions a measured value for the camber geometrical characteristic of the ophthalmic lens.
A device (100) for measuring at least one camber geometrical characteristic of an ophthalmic lens (50) provided on at least one of its faces (55) with at least one position-identifying mark (51, 52, 53), the device (100) comprising a support (20) for said ophthalmic lens (50), and on opposite sides of said support (20), firstly lighting means (10) for lighting said ophthalmic lens (50) along at least two different lighting directions, and secondly acquisition and analysis means (70) for acquiring and analyzing the light transmitted by said ophthalmic lens (50), said analysis means being adapted to identify shadows (31A, 32A, 33A, 31B, 32B, 33B) of said mark (51, 52, 53) when lighted in said at least two lighting directions, and to deduce from their positions a measured value for said camber geometrical characteristic of the ophthalmic lens (50).
A method of measuring at least one camber geometrical characteristic of an ophthalmic lens (50), the method comprising the following steps:
Dependencies are inferred from the claim text.