Abstract: The invention provides a device (10) for acquiring images of a plant, which device comprises: i) a first structure (60) defining a cavity (33) for receiving a portion to be imaged of the plant, the cavity presenting a longitudinal axis (13) and an opening (65) at one of its ends, the cavity being defined by at least one transparent wall forming a window (12) for observing the portion to be imaged; ii) a second structure (61) extending around the window (12) and mounted to move in translation along the longitudinal axis (13) relative to the first structure, and comprising: hollow reflective optics (11, 19) extending around the window and including a reflecting surface (19) directed towards the longitudinal axis; and a plurality of image sensors (18) regularly distributed around the window (12), the field of view (77) of each sensor including at least a portion of the reflective optics so as to capture images of the portion of the plant that is surrounded by the window, which images are reflected by the refl

Abstract: The invention provides a device (10) for acquiring images of a plant, which device comprises: i) a first structure (60) defining a cavity (33) for receiving a portion to be imaged of the plant, the cavity presenting a longitudinal axis (13) and an opening (65) at one of its ends, the cavity being defined by at least one transparent wall forming a window (12) for observing the portion to be imaged; ii) a second structure (61) extending around the window (12) and mounted to move in translation along the longitudinal axis (13) relative to the first structure, and comprising: hollow reflective optics (11, 19) extending around the window and including a reflecting surface (19) directed towards the longitudinal axis; and a plurality of image sensors (18) regularly distributed around the window (12), the field of view (77) of each sensor including at least a portion of the reflective optics so as to capture images of the portion of the plant that is surrounded by the window, which images are reflected by the refl

Abstract: A device for taking images of an article, the device including: a reflective optical system extending around an axis of symmetry, including a recess centered on the axis of symmetry and including at least one reflecting surface facing towards the axis of symmetry; and at least one imager arranged to capture at least one image of at least a portion of the article as reflected by the reflecting surface(s) substantially parallel to the axis of symmetry when the reflective optical system is arranged around the portion of the article.

Abstract: A device for taking images of an article, the device including: a reflective optical system extending around an axis of symmetry, including a recess centered on the axis of symmetry and including at least one reflecting surface facing towards the axis of symmetry; and at least one imager arranged to capture at least one image of at least a portion of the article as reflected by the reflecting surface(s) substantially parallel to the axis of symmetry when the reflective optical system is arranged around the portion of the article.

Abstract: The invention relates to a method of analysing or observing an object (40) along an observation direction (?, ?), characterized in that:—a substantially monochromatic incident electromagnetic wave in the form of a polarized plane wave (E+) is directed towards the object,—an image of the object is captured, said image possibly being a point image, resulting from the electromagnetic wave (A(?, ?)) that may be specular, scattered or diffracted by at least one interface or a volume of the object illuminated by the incident wave, in the observation direction,—a retarder (43) with adjustable retardation and an analyser (44) whose orientation is adjustable are disposed in succession in the path of the wave (A(?, ?)), between an imaging sensor (45) and the object observed,—the retardation (??*(?, ?)) of the retarder and the orientation (?(?, ?)) of the analyser are adjusted so as to minimize—or even cancel—a part g(A) of the wave (A(?, ?)) filtered by the retarder and the analyser.

Abstract: A method of manufacturing a light guide in the form of a plate having a face with a plurality of diffusing patterns obtained by means of a laser beam, wherein said face is exposed to radiation of intensity lying in the range 104 W/cm2 to 107 W/cm2, in particular in the range 3×104 W/cm2 to 3×106 W/cm2, so as to form surface irregularities and irregularities in depth.

Abstract: The technical field of the invention is that of manufacturing luminous display devices. The invention provides an edge-lighted luminous device comprising a thin plate of translucent or transparent plastics material, a light source lighting the edge of the plate, and on at least one of the main faces of the device, a grating of linear diffusing motifs of spacing that varies regularly.

Abstract: An apparatus for producing a substantially monochromatic light beam for chromotherapy and/or actinotherapy is disclosed ; the apparatus comprises a transportable housing including a light source, which housing includes a movable heterogeneous interference filter mounted on a support that is displaceable by means of a motor, said apparatus further including a wand enabling said light beam to be directed onto a zone to be treated, and said apparatus also including transmission means for conveying said light beam from said housing to said wand, said housing including an infrared filter interposed between said light source and said interference filter.