Abstract:
The invention relates to a device (10) for analyzing a heterogeneous material (1) by means of laser-induced plasma spectroscopy, said device comprising a laser (100) for generating a plasma from the heterogeneous material (1), a broadband detector (200) that is configured to detect a continuous spectrum of a plasma emission radiation, and a narrow-band detector (250) that is configured to detect a prescribed spectral line within the same plasma emission radiation.
Abstract:
La présente invention concerne les dispositifs permettant d'analyser l'état de surface d'un sol, à partir d'un mobile se déplaçant par rapport à ce sol. Le dispositif selon l'invention se caractérise essentiellement par le fait qu'il comprend des moyens source (10) pour émettre un faisceau (11) de rayonnement de type électromagnétique vers un point (13) de la surface du sol, des moyens de réception (14) aptes à recevoir un faisceau (35,37) du même type et aptes à délivrer des signaux représentatifs du faisceau reçu réfléchi (35) sur le point, des moyens de traitement (60) de ces signaux, et des moyens pour asservir (20) les moyens source en fonction de la vitesse de déplacement du mobile de façon que, sur au moins une portion de ce déplacement, la tache (13) que fait le faisceau sur le sol ait une vitesse sensiblement nulle par rapport au sol. Application : analyse de l'état de surface d'une voie de circulation à partir d'un véhicule, pour discriminer les sols secs, humides, verglacés, etc.
Abstract:
PROBLEM TO BE SOLVED: To provide an infrared detecting element having a structure in which an adhesion film is not easily formed in the space of the hollow structure even when the infrared detecting element is attached to a base plate with an adhesive.SOLUTION: The infrared detecting element comprises: a first base plate 2 having a first front surface 2a, a first back surface 2b on the opposite side of the first front surface 2a, a first recessed portion 4 provided in the first back surface 2b, and an infrared detecting section 3 for detecting infrared rays provided in an area of the first front surface 2a that faces the first recessed portion 4; a second base plate 8 having a second front surface 8a, a second back surface 8b on the opposite side of the second front surface 8a, and a second recessed portion 9 provided in an area of the second back surface 8b that faces the first recessed portion 4; and an adhesion film 7 that bonds the first back surface 2b and the second back surface 8b. An adhesive is applied to the second front surface 8a. A second outer peripheral portion 9b where the second recessed portion 9 intersects with the second back surface 8b surrounds a first outer peripheral portion 4b where the first recessed portion 4 intersects with the first back surface 2b.
Abstract:
A method and apparatus for characterising individual particles in an aquatic mass (24) is disclosed. According to a first aspect of the invention, an interference pattern (22) is generated in the aquatic mass (24) by overlapping two beams (10, 12) of electromagnetic radiation. The region of overlap defines a probe volume (14) such that the interference pattern (22) is generated in the probe volume (14). A single particle (26) in the probe volume is illuminated with the interference pattern (22), causing said single particle (26) to emit radiation. The radiation emitted by the single particle (26) is detected, and spectral data derived from the detected radiation is used to determine a property of the single particle. The emitted radiation may be fluorescence. According to a further aspect of the invention, a similar arrangement is used to illuminate a single particle so that the particle scatters radiation via Raman scattering. The Raman-scattered radiation is detected and used to determine a property of the single particle (26).
Abstract:
A system and method for in-field near infrared spectroscopy (NIRS) analysis of rubber and resin concentrations a guayule plant is provided. The system includes a wagon or other vehicle with the NIRS device mounted on the wagon. A computer or processor electrically coupled to the NIRS device is also housed within an area or extension of the wagon. During measurement of a guayule plant in the field, a guayule plant covering is placed over the guayule plant and a light shield coupled to the NIRS device is inserted into an opening on the guayule plant covering. The NIRS device is configured to perform a reading of the guayule plant within the plant covering and communicate results of the reading to the computer. A calibration equation is then preferably applied to the guayule plant readings to produce the rubber and resin concentrations of the guayule plant.
Abstract:
Le dispositif (102) de détection de traces de gaz comporte, dans un caisson fermé (104): - une cellule d'analyse (112) munie de moyens d'entrée et de sortie d'échantillons d'air, - une source d'émission laser (106) qui émet un rayon laser à destination de ladite cellule d'analyse, - un capteur photosensible principal (156) positionné pour recevoir le rayon laser sortant de ladite cellule d'analyse et adapté à émettre un signal représentatif de l'intensité lumineuse reçue par ledit capteur et - un moyen de maintien (144 à 150) en température adapté à maintenir à une température prédéterminée constante, conjointement: - la source d'émission laser, - l'air entrant dans la cellule d'analyse, - un banc optique (118) supportant la cellule et la source d'émission laser et - le contenu du caisson fermé.
Abstract:
In one embodiment, a method and system is provided for detecting target materials using a combination of stroboscopic signal amplification and Raman spectroscopy techniques.
Abstract:
A soil test apparatus for field use comprises structure adapting the apparatus for transport over a field for testing the soil thereof; an infrared radiation generator (20) for producing infrared radiation at a plurality of predetermined wavelengths, an elongate light carrying member (24) coupled to the infrared radiation generator and extending therefrom for directing infrared radiation onto the soil; and a light detector (26) for detecting infrared radiation reflected from the soil and for producing corresponding electrical signals.