Abstract: The contact lens (100) for augmented reality comprises: a transparent body (102) designed to be placed on an eye (104); and at least one augmented reality module comprising an optical source (114) attached to the transparent body (102) and designed to emit a light into the transparent body, and an optical element (116) attached to the transparent body (102) and designed to receive the light from the optical source (114) and send it in the direction of the eye (104). The optical element (116) is a hologram designed to diffract the received light as a holographic image in the direction of the eye (104).

Abstract: A method—for printing a 3D object, defined by a 3D image having multiple illuminated points, in a photoreactive composition volume—includes extracting from the image a mosaic sequence. Each mosaic includes multiple solid areas, each including illuminated point(s). The mosaic sequence is projected in an axial direction, inside the volume, to form—from each projected mosaic—multiple light areas, each corresponding to a solid area of the projected mosaic. In the solid area of a mosaic, a number of illuminated points and the distribution of the illuminated points are adjusted so, when projecting the mosaic is into the volume, the light area corresponding to the solid area causes a photoreaction in an associated composition block with a desired axial resolution. In the same mosaic, the solid areas are distributed such that, when projecting the mosaic into the volume, the composition does not react between the light areas associated with the multiple solid areas.

Abstract: The contact lens (100) for augmented reality comprises: a transparent body (102) designed to be placed on an eye (104); and at least one augmented reality module comprising an optical source (114) attached to the transparent body (102) and designed to emit a light into the transparent body, and an optical element (116) attached to the transparent body (102) and designed to receive the light from the optical source (114) and send it in the direction of the eye (104). The optical element (116) is a hologram designed to diffract the received light as a holographic image in the direction of the eye (104).

Abstract: Some embodiments are directed to a system for measuring vibrations of a surface of a mechanical part, by digital holography. The system includes a source of radiation emitting in a predetermined range of frequencies, a first separator element configured to define a first incident ray and a reference ray, a module for shaping a second incident ray from the first incident ray, and an optical element configured to make the reference ray and a radiation produced by a reflection of the incident ray on the surface of the mechanical part interfere. The module for shaping the second incident ray includes diffracting optical elements having a diffraction structure to diffract the incident radiation. The structure is from a polymer, sol-gel or photoresin material resting against a glass substrate, the structure including elements etched in a plane parallel and/or orthogonal to the substrate, with dimensions from 100 nanometres to 100 micrometres.

Abstract: The present invention relates to an optical device for generating a diffracted image on a support (S), said device comprising a diffractive optical element (5) arranged to diffract an optical beam, in order to generate a diffraction image. The device further comprises an optical power mirror (7.1; 7.2; 7.3; 7.4; 7.5), the mirror being placed with respect to the diffractive optical element so as to project the diffraction figure towards the support to obtain a magnified version of the diffracted image.

Abstract: A system for measuring vibrations of a surface (VSURF) of a mechanical part (M), comprising a source (SOURCE) of radiation (L), a first separator element (ELI) configured to define a first incident ray (LB1) and a reference ray (RLB), a shaping module (DOEM) producing a second incident ray (LB2) from said first incident ray (LB1), and an optical element (OE) capable of an interferential addition of the reference ray (RLB) and a ray produced by a reflection of said second incident ray (LB2) on said surface (VSURF), the shaping module (DOEM) comprising one or more diffracting optical elements (DOE1, . . . , DOEn), each comprising at least one diffraction structure (FSTRUCT) diffracting all or part of the first incident ray (LB1) so as to illuminate a chosen surface of the mechanical part.

Abstract: Connection device for multiple-core optical fibers based on optical elements in free space. This device comprises a first optical means (36) which is refractive or diffractive, and at least one second means (38, 40) which is diffractive. The first means causes the light beams exiting cores (30) of fiber (28) to diverge as far as an area in which these beams are separated in space and have cross sections whose size is compatible with the spatial bandpass of the second means. The latter is positioned in this area and directs the beams, independently from one another, towards corresponding optical components (34). Application to optic telecommunications.