Abstract:
A spectrometer 1A is made up of : an optical body 10 within which a light separation path is set along which an object light to be separated propagates; a light entry slit 16 through which the object light enters; a diffraction grating 17 for spectrally separating the incident object light; and a photodiode array 18 for detecting the object light separated by the diffraction grating 17. As an optical member for optically interconnecting the optical body 10 and the photodiode array 18, an optical connection member 20 is provided, with its light entry surface 21 for the separated object light in contact with the upper surface 11 of the optical body 10, with its light exit surface 22 in contact with the photodiode array 18, with the light exit surface 22 tilted by a specified angle relative to the light entry surface 21. Thus, the spectromoter capable of bringing about sufficient accuracy of placing optical elements in a simple constitution while bringing down cost is realized.
Abstract:
Methods and systems for carrying out the distribution of light in a ray pathway (21) into wavelength components (21 - 27) comprising optical elements (10, 11) of the diffraction grating type that diffract the said light into several spectral orders (m). The invention is characterised in that at least two diffraction grating surfaces are placed sequentially in the ray pathway whose orientations and grating constants are selected such that the wavelength components that are diffracted at the grating surfaces into the respective orders, whose sum (M = m1 + m2) is constant, emerge from the last grating surface (11) in essentially the same direction.
Abstract:
L'invention vise à intégrer, au moment de la phase de fabrication, une fonction d'interféromètre statique à deux ondes sur un photodétecteur afin de constituer un spectromètre statique miniature par transformée de Fourier. L'interféromètre est essentiellement constitué par une lame (LC) dont une première face plane (F1) coïncide avec un plan d'image (IM) sur des éléments photosensibles semi-conducteurs (EPS) et dont la deuxième face (F2) n'est pas parallèle à la première face (F1). Cette deuxième face (F2) réfléchit une onde déphasée en fonction de l'épaisseur locale de la lame (LC) par rapport à l'onde incidente (E0) qui interfère avec elle.
Abstract:
The present invention relates to a miniaturized optical component provided with a free jet device comprising one or more optical microstructures (21b, 22b) and one or more outer structures (23b) for light, and enabling components to be manufactured in one single step with no need for particular adjustment. For that purpose, the free jet device is located in a cavity (61) delimited by a single-piece element obtained by moulding, said element presenting on its inner surface (23b) turned to the cavity the optical microstructure (21b, 22b) and the connection structure (23b) for light. The component (60) can be a single-layer or multilayer component. According to the inventive method, a cast part is made which has, on its external face, layers complementary to the optical microstructure(s) and the connection structure for light of the optical component. The optical microstructures of the cast part can be metallized before moulding. A metal layer and/or a plastic layer is applied during the moulding process onto the cast part, from which it is later removed.
Abstract:
A method and apparatus for measuring spectral information of light from at least one object (15); said apparatus comprising at least one light detecting means (34); and at least one transparent body (31) having a front side (F) including: an entrance surface (311) having positioned in or near thereof an entrance aperture means (30), and at least one reflecting surface (312); and said transparent body further having a back side (B) including: at least one reflecting surface (313) for reflecting light received from said entrance aperture means, and an exit surface (314); said detecting means being positioned in or near said exit surface; said first reflecting surface, said second reflecting surface, or both, having at least one diffractive optical element (32) and/or at least one focusing means (33). Such apparatus comprising more spectral channels, and such apparatus comprising distance sensing means.
Abstract:
The invention concerns a micromonochromator formed on a substrate and comprising diffraction means (6) associated with an input including at least an input point and with an output including at least an output point, mobile means for guiding light (2-20, 4-26) associated with said input or said output or to both, and means (23) for recuperating the light supplied by said output. It is constructed according to an integrated optics technique. The mobile means comprise at least a flexible girder integrated in the substrate and provided with at least a light guide, said flexible girder being capable of scanning the input and/or output continuously. The invention is useful for multiplexing/demultiplexing wavelength and in spectrometry.
Abstract:
Spektrometer mit einer Optikanordnung zum Auffangen von Messlicht und zur Aufspaltung desselben in Spektralanteile mit einem Lichteinlass, einem Reflexionsbeugungsgitter und einer Auslassfläche, bei der das spektrale zerlegte Messlicht austritt, wobei die Optikanordnung (O) einen zumindest zum Teil im wesentlichen transparenten Tragkörper (T) aufweist, der durch zwei gegenüberliegende Begrenzungsflächen (1,2) begrenzt ist, wobei der Lichteinlass (10), das Reflexionsbeugungsgitter (20) und die Auslassfläche auf der Seite der Ersten (1) der beiden Begrenzungsflächen (1,2) des Tragkörpers (T) angeordnet sind und die Zweite (2) der beiden Begrenzungsflächen einen reflektierenden Konkavspiegel aufweist, der das eintretende Licht kollimiert und auf das Reflexionsbeugungsgitter reflektiert und das vom Reflexionsbeugungsgitter gebeugte Licht auf die Auslassfläche fokussiert, dadurch gekennzeichnet, dass der Lichteinlass (10) und die Auslassfläche voneinander beabstandet sind und die Dispersion des Lichtes in der Auslassfläche (R) zumindest in etwa senkrecht zu einer Verbindungslinie zwischen dem Lichteinlass (10) und der Auslassfläche ist.
Abstract:
A miniaturized spectrometer is adapted for placement within a body near tissue to be characterized. The spectrometer includes a light source (3) and a plurality of light detectors (61). The light source generates light to illuminate the tissue. The detectors detect optical signals from the illuminated tissue and convert these optical signals to electrical signals. The miniaturized spectrometer can be disposed at the distal end of an interventional device (4). Optical conduits, such as fiber optic cables or strands, extending the length of the interventional device are not required when the miniature spectrometer is employed.