Abstract:
The invention relates to tunable wavelength-selective optical filters for letting light of a narrow optical spectrum band, centered around an adjustable wavelength, to pass through and to stop wavelengths lying outside this band. More particularly, the invention relates to a process for the collective fabrication of optical filtering components, consisting in producing a plurality of optical filtering components on a transparent substrate. The process further comprises covering the plurality of components with a transparent collective cover, in optically testing each component individually, and in separating the various components from one another. The invention also relates to a wafer of components, comprising a transparent substrate on which a plurality of optical filtering components has been produced, a transparent cover (8) collectively covering the components. The wafer further includes means for individually testing each component.
Abstract:
The invention relates to tunable wavelength-selective optical filters for letting light of a narrow optical spectrum band, centered around an adjustable wavelength, to pass through and to stop wavelengths lying outside this band. More particularly, the invention relates to a process for the collective fabrication of optical filtering components, consisting in producing a plurality of optical filtering components on a transparent substrate. The process further comprises covering the plurality of components with a transparent collective cover, in optically testing each component individually, and in separating the various components from one another. The invention also relates to a wafer of components, comprising a transparent substrate on which a plurality of optical filtering components has been produced, a transparent cover (8) collectively covering the components. The wafer further includes means for individually testing each component.
Abstract:
The invention relates to wavelength selective optical components for transmitting the light in a narrow spectral band, which is centered around a wavelength, and for reflecting the wavelengths lying outside this band. The component includes an input guide (2) conducting light radiation (3) to a tunable filter (1), an input guide (2) conducting the radiation (3) to the filter (1) in order to perform a first pass through it. The component includes means (6) for returning a first part (4) of the radiation (3) reflected by the filter (1) during the first pass in order to perform a second pass through it.
Abstract:
The invention pertains to a process and to a device for positioning an optical component between two optical fibers furnished at their end with lenses comprising: drilling a support in such a way as to fix therein a capillary tube whose inside diameter is designed to slip an optical fiber thereinto, fixing the capillary tube in the drilling of the support, making a blind cut and of the capillary tube, in such a way as to separate the capillary tube into two parts, a first plane face of the cut being perpendicular to a longitudinal axis of the capillary tube, positioning the component on the first plane face, positioning an optical fiber in each of the parts. The device comprises a support through which is fixed a capillary tube, the support comprising a cut so as to separate the capillary tube into two parts. The cut comprises a first plane face perpendicular to a longitudinal axis of the capillary tube. The component is positioned on the first plane face.
Abstract:
The invention relates to a method for detecting clusters of biological particles (12) on a surface (11), comprising steps that involve: a. determining (E1) a topographical representation (20) of said surface; and b. detecting (E3, E4), on said topographical representation, at least one contour defining a region that is likely to correspond to a cluster of biological particles.
Abstract:
The invention relates to a method for detecting clusters of biological particles (12) on a surface (11), comprising steps that involve: a. determining (E1) a topographical representation (20) of said surface; and b. detecting (E3, E4), on said topographical representation, at least one contour defining a region that is likely to correspond to a cluster of biological particles.
Abstract:
This monochromatic X-ray source comprises a target in particular made from a material incorporating emitting ions comprising an element, the said atoms being excited by electron bombardment, essentially by the electrons located on the K layers of the said atoms. The target material is generally in the solid state and it is held together by means of structuring atoms representing one or more elements and bound to the emitting atoms, the said structuring atoms having an absorption coefficient equal to or lower than 2.3 μm−1 for the X-rays emitted by the emitting atoms.
Abstract:
The invention pertains to a process and to a device for positioning an optical component between two optical fibers furnished at their end with lenses comprising: drilling a support in such a way as to fix therein a capillary tube whose inside diameter is designed to slip an optical fiber thereinto, fixing the capillary tube in the drilling of the support, making a blind cut of the support and of the capillary tube, in such a way as to separate the capillary tube into two parts, a first plane face of the cut being perpendicular to a longitudinal axis of the capillary tube, positioning the component on the first plane face, positioning an optical fiber in each of the parts. The device comprises a support through which is fixed a capillary tube, the support comprising a cut so as to separate the capillary tube into two parts. The cut comprises a first plane face perpendicular to a longitudinal axis of the capillary tube. The component is positioned on the first plane face.
Abstract:
Disclosed is an image detector of the type comprising an array of photosensitive dots and an additional light source. The disclosed device can be applied to particular advantage in the detection of radiological images. The image detector comprises a photosensitive matrix and an additional source positioned on opposite faces of a support. The matrix is exposed to a radiation known as an incident radiation, a part of which is not detected by the matrix. The detector furthermore comprises means to promote the transmission of an additional radiation produced by the additional source with respect to the undetected part of the incident radiation. An arrangement of this kind enables an improvement in the contrast of the image, especially at the low spatial frequencies.
Abstract:
A system of analysis with the naked eye and by fluorescence of a field in an illuminated area comprising a periodically-excited first low-remanence white light illumination source; a second light source for exciting fluorescent elements located in said field, active at least during part of the time periods when the first source is off; and a fluorescence analysis device active during time periods when the first source is off and the second source is on.