Device for automatically detecting characteristics of an ophthalmic lens and an automatic device for fitting a centering and drive peg incorporating it
AssigneeEssilor International (Compagnie General d'Optique)
InventorsXavier Levecq, Fabien Divo, Laurent Guillermin
Life of this patent
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Abstract
A device for automatically detecting characteristics of an ophthalmic lens includes a support receiving the lens, an illumination system and an analysis system. The optics of the illumination system define two alternate optical paths, one of which passes through a mask forming a Hartmann matrix.
Claims20
A device for automatically detecting characteristics of an ophthalmic lens, comprising:
- a support shaped to receive a lens and,
- on respective opposite sides of said support,
- i) an illumination system including an optical system for producing a light beam directed toward a lens on said support and, ii) a system for analyzing the image transmitted by said lens on said support,
- wherein, said optical system defines two alternate optical paths for said light beam, and
- a mask is placed on one only of said paths at a location such that it occupies a predetermined position relative to an optical axis of said analysis system and the other path is exempt from any mask.
A device for automatically detecting characteristics of an ophthalmic lens, comprising:
- a support shaped to receive a lens and,
- on respective opposite sides of said support, i) an illumination system including an optical system for producing a light beam directed toward a lens on said support and, ii) a system for analyzing the image transmitted by said lens on said support,
- wherein said optical system defines two alternate optical paths for said light beam and a mask is placed on one only of said paths at a location such that it occupies a predetermined position relative to an optical axis of said analysis system, and said mask is disposed on the upstream side of said support with respect to the direction of said light beam.
A device for automatically positioning a centering and drive peg on an ophthalmic lens, including a device for automatically detecting characteristics of an ophthalmic lens, comprising
- a support shaped to receive a lens and,
- on respective opposite sides of said support, i) an illumination system including an optical system for producing a light beam directed toward a lens on said support and, ii) a system for analyzing the image transmitted by said lens on said support,
- wherein said optical system defines two alternate optical paths for said light beam and a mask is placed on one only of said paths at a location such that it occupies a predetermined position relative to an optical axis of said analysis system.
Dependencies are inferred from the claim text.