Essilor International

Dominick Hubacz

Marius Peloux

Bruno Fermigier

Mathieu Meynen

Ludovic Jouard

Marc Reignault

Stéphane Gueu

An optical device, to be used by a user driving a vehicle, the optical device including a controllable variable-tint lens and a controller, where the controller is configured to switch the optical device between at least two different modes, at least one mode being a driving mode and when the optical device is in the driving mode, a control parameter of the lens meets at least one driving criterion.

Optical device and means for detecting driving conditions

Disclosed is a method for determining a parameter of an optical device including at least an optical lens, the method including: an optical system providing step, during which an optical system including a visual target, the optical device and an image acquisition module is provided in an initial configuration state, a parameter determining step during which a parameter of the optical device is determined based on the blur level of the images of the visual target acquired by the image acquisition module through the optical device in at least two different configuration states.

Method for determining a parameter of an optical device comprising at least an optical lens

The present invention relates to an optical device usable in a head-mounted display which comprises a light conducting element and at least one wafer, and to a head-mounted device which is configured to provide an informative display of augmented reality for a wearer of the head-mounted device and which comprises such an optical device. This optical device () comprises: a light conducting element () which has two first and second opposite main faces (and) and which inputs and conducts by total internal reflections a light () received from the light source () and partially outputs it out of said element, at least one wafer () which comprises an internal surface () facing a said first main face of said light conducting element, and interposition means in contact with said first main face and said internal surface and defining a gap () optically isolating said element. According to the invention, said interposition means comprise a peripheral sealing arrangement () which extends along its peripheral length between and in sealing contact with a peripheral area () of said internal surface and a facing zone () of said first main face, at least one portion of said sealing arrangement exhibiting a locally reduced optical coupling with said first main face to preserve said internal reflections at said at least one portion toward the inside of said element.

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Charenton-le-Pont, France

Dominick Hubacz