Abstract: An angular filter for an image acquisition device including a stack includes: a layer with mediums having different refraction indexes and transparent to the radiation, the layer only letting through rays of the radiation having incidences smaller than a first maximum incidence; and an array of openings delimited by walls opaque to a visible and/or infrared radiation and an array of microlenses. The assembly formed by the array of openings and the array of microlenses only lets through rays having incidences smaller than a second maximum incidence smaller than the first maximum incidence.

Abstract: An angular filter for an image acquisition device including a stack, includes: a first array of first openings delimited by first walls opaque to a visible and/or infrared radiation; an array of microlenses; and a second array of second openings delimited by second walls opaque to the visible and/or infrared radiation.

Abstract: A system for acquiring images of an object includes a stack of layers having a total thickness smaller than 600 ?m. The stack of layers includes an image sensor, a source of a radiation (RF), and an angular filter that covers the image sensor and is interposed between the source and the image sensor. The image sensor has an array of photodetectors. The source of the radiation (RF) has a thickness smaller than 400 ?m and includes first and second opposite surfaces. The second surface faces a side of the image sensor. A surface density of an energy flux emitted by the source through the first surface is greater than 100 ?W/cm2. The ratio of the surface density of the energy flux emitted by the source through the second surface and the first surface is smaller than 0.4. A transmittance of the source to a portion of the radiation is greater than 15%.

Abstract: A device includes an at least partially transparent screen and, between the screen and an optical sensor, a layer having at least one optically clear portion with a refraction index smaller by at least 0.1 than the refraction index of an optical material of the optical sensor.

Abstract: An angular filter includes a first and a second array of plano-convex lenses and an array of openings. The planar surfaces of the lenses of the first array and of the second array face one another.

Abstract: A device includes an at least partially transparent screen and, between the screen and an optical sensor, a layer having at least one optically clear portion with a refraction index smaller by at least 0.1 than the refraction index of an optical material of the optical sensor.

Abstract: A device includes an at least partially transparent screen, an optical sensor and, between the sensor and the screen, a non-peripheral portion. The non-peripheral portion includes one or a plurality of rigid elements.

Abstract: An infrared photodetector including a stack of layers on a substrate having an active area made of organic semiconductor materials capable of converting an infrared radiation into an electric signal and including, in said stack and/or on the substrate, a single layer at least partially filtering visible light.

Abstract: An optical system includes a layer having a first surface intended to receive a radiation and a second surface opposite to the first surface. The the layer is opaque to the radiation and includes through or partially through holes open on the first surface. The optical system further includes an array of micrometer-range optical elements covering the layer. Each optical element is configured to behave as a converging lens having a focal distance in the range from 1 ?m to 100 ?m. The distance between the surface equidistant from the first and second surfaces and the focal points of the optical elements is smaller than twice the thickness of the layer.

Abstract: A method of manufacturing an optical system including a layer having through or partially through holes and covered with an array of micrometer-range optical elements, the optical system including a surface intended to receive a first radiation, the method including exposing a film, made of the same material as the layer or of a material different from that of the layer, to a second radiation through the array of micrometer-range optical elements, the material being photosensitive to the second radiation or machinable by the second radiation, and removing the portions of the film exposed or non-exposed to the second radiation to delimit the holes totally or partially crossing said layer.

Abstract: A method of manufacturing an optical system including an angular filter having a stack of first and second elementary angular filters, the method including exposing a layer of positive resist through the first elementary angular filter and removing the exposed portions of the layer to form holes crossing the layer, the layer crossed by the holes forming the second elementary angular filter.

Abstract: An image acquisition system includes a source of a radiation, an image sensor including an array of photodetectors capable of detecting the radiation and including a surface, and an angular filter, covering the sensor, and capable of blocking the rays of the radiation having an incidence relative to a direction orthogonal to the surface greater than a threshold and of giving way to at least certain rays of the radiation having an incidence relative to a direction orthogonal to the surface smaller than the threshold.

Abstract: An image acquisition system includes a source of a radiation, an image sensor including an array of photodetectors capable of detecting the radiation and including a surface, and an angular filter, covering the sensor, and capable of blocking the rays of the radiation having an incidence relative to a direction orthogonal to the surface greater than a threshold and of giving way to at least certain rays of the radiation having an incidence relative to a direction orthogonal to the surface smaller than the threshold.

Abstract: A display and detection system including an image sensor, a display screen and an antireflection system covering the display screen and the image sensor, such an antireflection system including an electrically-controllable rectilinear polarizer.

Abstract: A display and detection system including an image sensor, a display screen and an antireflection system covering the display screen and the image sensor, such an antireflection system including an electrically-controllable rectilinear polarizer.

Abstract: A display and detection system including an image sensor, a display screen and an antireflection system covering the display screen and the image sensor, such an antireflection system including an electrically-controllable rectilinear polarizer.

Abstract: An infrared photodetector including a stack of layers on a substrate having an active area made of organic semiconductor materials capable of converting an infrared radiation into an electric signal and including, in said stack and/or on the substrate, a single layer at least partially filtering visible light.

Abstract: The instant disclosure describes an optical device for the interferometric analysis of the surface condition of an object, including: a light source; an optical fiber capable of receiving the incident light wave and transmitting said wave to the object; a detector capable of detecting a combination between a light wave reflected by the optical fiber and a light wave returned by the object; and in which the optical fiber has a free end in the shape of a cone, with a vertex angle of between 15 and 25 degrees, the tip of the cone having dimensions of less than 50×50 nm, and the tip of the cone being placed, while in use, at a distance of between 5 and 50 ?m from the surface of the object.

Abstract: The instant disclosure describes an optical device for the interferometric analysis of the surface condition of an object, including: a light source; an optical fibre capable of receiving the incident light wave and transmitting said wave to the object; a detector capable of detecting a combination between a light wave reflected by the optical fibre and a light wave returned by the object; and in which the optical fibre has a free end in the shape of a cone, with a vertex angle of between 15 and 25 degrees, the tip of the cone having dimensions of less than 50×50 nm, and the tip of the cone being placed, while in use, at a distance of between 5 and 50 ?m from the surface of the object.