Method for the absolute measurement of the geometrical or optical structure of an optical component and device for implementing it

The invention relates to a method for the absolute measurement of the geometrical or optical structure of an optical component (4), comprising the steps consisting in: - illuminating the said optical component with incident light, the wavefront of which is known; - measuring, in a given plane, the c...

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Bibliographic Details
Main Authors BERTRAND PATRICK, LE SAUX GILLES, LIPPENS XAVIER, LAFAY CHRISTOPHE
Format Patent
LanguageEnglish
French
Published 24.03.1995
Edition6
Subjects
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Summary:The invention relates to a method for the absolute measurement of the geometrical or optical structure of an optical component (4), comprising the steps consisting in: - illuminating the said optical component with incident light, the wavefront of which is known; - measuring, in a given plane, the charts of the slopes of the wavefront of the said light after reflection off the said optical component or transmission through the said optical component; which method furthermore includes at least one calculation procedure consisting in deducing, from the said measurement of the charts of slopes, the geometrical or optical structure of the optical component. The subject of the invention is also a device for the implementation of this method. The invention applies in particular in the ophthalmic field for checking or measuring ophthalmic lenses or moulds for manufacturing ophthalmic lenses. L'invention concerne un procédé de mesure absolue de la structure géométrique ou optique d'un composant optique (4), comprenant les étapes consistant à: - éclairer ledit composant optique par une lumière incidente, dont le front d'onde est connu, - mesurer dans un plan donné les cartes de pentes du front d'onde de ladite lumière après réflexion sur ledit composant optique ou transmission par ledit composant optique, qui comporte en outre au moins une procédure de calcul consistant à déduire de ladite mesure des cartes de pentes la structure géométrique ou optique du composant optique. Elle a aussi pour objet un dispositif pour la mise en oeuvre de ce procédé. L'invention s'applique notamment dans le domaine ophtalmique pour le contrôle ou la mesure de lentilles ophtalmiques ou de moules de fabrication de lentilles ophtalmiques.
Bibliography:Application Number: FR19930011136