Abstract: A lens for shaping light rays, for a luminous lighting and/or signalling module of a motor vehicle, includes an entrance face for the light rays and an opposite exit face. The lens has a flat-lens shape the exit face of which is equipped with prisms forming a Fresnel structure, at least one of these prisms being equipped on an exterior face with diffractive structures, and the entrance face of which is at least partially equipped with microstructures. The lens applies to motor vehicles.

Abstract: A lighting module includes at least one light-emitting assembly and one lens for shaping the emitted light rays, the lens having an entrance face for the light rays and an exit face. The lens is a flat lens, the lens and the emitting assembly being configured so that the exit face includes a first section and a second section that differ in the amount of light rays exiting from the lens via one or other of these sections in order that the first section forms an optical section and in order that the second section forms a lighting neutral section. The second section extends from the first section in order to have a largest dimension that is larger than the thickness of the flat lens, the exit face of the lens including features over the entirety of its area.

Abstract: A lighting module for motor vehicles is provided. The lighting module comprises at least one lighting engine configured for forming a light beam with a cut-off line running along one or more axes, and at least one lens designed to project the light beam with a cut-off line. The lens comprises diffractive elements which correct all or part of the chromatism of the lens, and it comprises a central region which is lacking any diffractive elements.

Abstract: The invention concerns, in one aspect, an actuator for generating a bidirectional force intended for being integrated into a deformable mirror comprising a deformable reflective substrate. Said actuator comprises a stationary body (10); a drive device; a drive rod (20) able to be driven in a translatory movement with respect to the stationary body (10), along an axis of translation (xx?), by means of the drive device; a floating head (30) designed to be attached to the deformable reflective substrate, and mounted in floating manner with respect to the drive rod via first and second elastic means (33, 35). The first and second elastic means (33, 35) are each mounted between the drive rod (20) and the floating head (30) and are designed to apply forces to the floating head, whose projections on the translation axis (xx?) are of opposite directions.

Abstract: Methods and devices for reducing the dimensions of an incident light beam of large dimensions are disclosed. The method includes the dispatching of a first light beam toward a partially reflecting plate of dimensions suitable for the dimensions of the light beam of large dimensions, the dispatching onto a convergent reflective element of a second light beam arising from the transmission through the partially reflecting plate of the first light beam, the dispatching of a third light beam arising from the reflection on the convergent reflective element of the second light beam, toward said partially reflecting plate, and the reflection of the third beam on the partially reflecting plate so as to form a fourth light beam.

Abstract: Methods and devices for reducing the dimensions of an incident light beam of large dimensions are disclosed. The method includes the dispatching of a first light beam toward a partially reflecting plate of dimensions suitable for the dimensions of the light beam of large dimensions, the dispatching onto a convergent reflective element of a second light beam arising from the transmission through the partially reflecting plate of the first light beam, the dispatching of a third light beam arising from the reflection on the convergent reflective element of the second light beam, toward said partially reflecting plate, and the reflection of the third beam on the partially reflecting plate so as to form a fourth light beam.

Abstract: A device and a method for high-speed linear polarization imaging of a scene are disclosed. The device comprises a polarization modulator for modulating the polarization of light emitted from the scene in order to obtain at least three linear polarization states of the light. The polarization modulator comprises a polarizer, a first polarization rotation block comprising a fixed quarter-wave plate and a first liquid crystal operating as a quarter-wave plate, and a second polarization rotation block comprising a second liquid crystal operating as a half-wave plate. Each of the first and second liquid crystals are switchable between two states, thereby providing the at least three polarization states to the polarization modulator. The device further comprises a sensor adapted to capture image frames of the light from the scene at each polarization state of the polarization modulator.

Abstract: A device and a method for high-speed linear polarization imaging of a scene are disclosed. The device comprises a polarization modulator for modulating the polarization of light emitted from the scene in order to obtain at least three linear polarization states of the light. The polarization modulator comprises a polarizer, a first polarization rotation block comprising a fixed quarter-wave plate and a first liquid crystal operating as a quarter-wave plate, and a second polarization rotation block comprising a second liquid crystal operating as a half-wave plate. Each of the first and second liquid crystals arc switchable between two states, thereby providing the at least three polarization states to the polarization modulator. The device further comprises a sensor adapted to capture image frames of the light from the scene at each polarization state of the polarization modulator.