A system and method for remote detection of gaseous substances by a DIAL system includes causing a laser beam generated by a first laser to impinge on a semipermeable mirror, wherein 50% of the laser beam power passes through the semipermeable mirror and proceeds through a first aperture towards a target, wherein a remaining 50% of the laser beam power reflects from the semipermeable mirror and impinges on a reflecting mirror from which it is reflected. The method may also include causing a delayed laser beam generated by a second laser to impinge on the semipermeable mirror, wherein 50% of the laser beam power passes through the semipermeable mirror and impinges on the reflecting mirror from which it is reflected and is directed through the second aperture to the target and at the same time a remaining 50% of the laser beam power reflects from the semipermeable mirror.
G01N 21/3504 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p. ex. analyse de mélanges de gaz
G01N 21/17 - Systèmes dans lesquels la lumière incidente est modifiée suivant les propriétés du matériau examiné
G01N 21/39 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant des lasers à longueur d'onde réglable
2.
LIDAR DEVICE WITH A LASER RETUNED BY A DIFFRACTION GRATING
A LIDAR device with a laser retuned by a diffraction grating (1), which contains an auxiliary detector (5) for generating an electrical signal for synchronizing and measuring the energy of the departing laser beam, characterized in that the auxiliary detector (5) is arranged with respect to the diffraction grating (1) in an area where the energy of the laser radiation falls from the +1st diffraction maximum (8) of grating (1).
A method for selecting targets for LIDAR, in which a digital image of the environment is created using a device (3) for creating an image recording of the environment in a wide field of view, in which LIDAR measurement is performed. The device (3) is rectified with a LIDAR detector (1). On the digital image of the environment, objects suitable for the reflection of the laser beam of the LIDAR are subsequently detected. The detected objects are subsequently joined into groups of objects that are located in physical proximity to each other. The detection of objects suitable for the reflection of the LIDAR laser beam and their joining into groups of objects is performed by software processing of the digital image. Subsequently, the LIDAR measures the distance to the designated groups of objects, whereas if the distance to a group of objects is measured, this group of objects is selected into the group of suitable targets for detection and measurement by LIDAR, and if the distance to a group of objects is not measured, the group of objects is excluded from the group of suitable targets for detection and measurement by LIDAR.
A system and method for remote detection of gaseous substances by a DIAL system includes causing a laser beam generated by a first laser to impinge on a semipermeable mirror, wherein 50% of the laser beam power passes through the semipermeable mirror and proceeds through a first aperture towards a target, wherein a remaining 50% of the laser beam power reflects from the semipermeable mirror and impinges on a reflecting mirror from which it is reflected. The method may also include causing a delayed laser beam generated by a second laser to impinge on the semipermeable mirror, wherein 50% of the laser beam power passes through the semipermeable mirror and impinges on the reflecting mirror from which it is reflected and is directed through the second aperture to the target and at the same time a remaining 50% of the laser beam power reflects from the semipermeable mirror.
G01N 21/17 - Systèmes dans lesquels la lumière incidente est modifiée suivant les propriétés du matériau examiné
G01N 21/3504 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p. ex. analyse de mélanges de gaz
G01N 21/39 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant des lasers à longueur d'onde réglable
6.
Method for limiting the deflection of a laser head during temperature changes and a laser head
A method and device for limiting the deflection of a laser head during temperature changes such that a laser head is usable in applications of laser technology.
A remote detector of gaseous substances in the atmosphere by a DIAL system with two lasers is described, comprising a first and a second laser, wherein at the intersection of the axes of their laser beams a semipermeable mirror is located, merging the beams of said two lasers to output a first and a second merged beams, each of which comprising 50% of laser beam power from the first laser and 50% of laser beam power from the second laser; downstream the semipermeable mirror, a totally reflecting mirror is located; the first merged beam is transmitted through a first aperture located in a first direction from the semipermeable mirror, and the second merged beam is transmitted through a second aperture located in a second direction after being reflected from the totally reflecting mirror; and the first and second merged beams are directed to the same target, and a corresponding method.
G01N 21/3504 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p. ex. analyse de mélanges de gaz
G01N 21/39 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant des lasers à longueur d'onde réglable
8.
METHOD FOR REMOTE DETECTION OF GASEOUS SUBSTANCES IN THE ATMOSPHERE BY THE DIAL SYSTEM WITH TWO LASERS AND A REMOTE DETECTOR
A remote detector of gaseous substances in the atmosphere by a DIAL system with two lasers is described, which comprises a first laser (1) and a second laser (2), wherein at the intersection of the axes of their laser beams a semipermeable mirror (3) is located, which merges the beams of said two lasers (1, 2) so as to output a first and a second merged beams, each of which comprising 50% of laser beam power from the first laser (1) and 50% of laser beam power from the second laser (2); downstream the semipermeable mirror (3), a totally reflecting mirror (5) is located; the first merged beam is transmitted through a first aperture (4) located in a first direction from the semipermeable mirror (3), and the second merged beam is transmitted through a second aperture (6) located in a second direction after being reflected from the totally reflecting mirror (5); and the first and second merged beams are directed to the same target. Also disclosed is a corresponding method.
G01N 21/3504 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant la lumière infrarouge pour l'analyse des gaz, p. ex. analyse de mélanges de gaz
G01S 17/00 - Systèmes utilisant la réflexion ou la reradiation d'ondes électromagnétiques autres que les ondes radio, p. ex. systèmes lidar
G01N 21/17 - Systèmes dans lesquels la lumière incidente est modifiée suivant les propriétés du matériau examiné
G01N 21/39 - CouleurPropriétés spectrales, c.-à-d. comparaison de l'effet du matériau sur la lumière pour plusieurs longueurs d'ondes ou plusieurs bandes de longueurs d'ondes différentes en recherchant l'effet relatif du matériau pour les longueurs d'ondes caractéristiques d'éléments ou de molécules spécifiques, p. ex. spectrométrie d'absorption atomique en utilisant des lasers à longueur d'onde réglable
9.
METHOD FOR LIMITING THE DEFLECTION OF A LASER BEAM FROM A LASER HEAD DURING TEMPERATURE CHANGES AND A LASER HEAD
The method far limiting the deflection of the laser head during temperature changes is solved in such a way that the temperature difference between the warmest upper wall and the coldest lower wall of the laser head is reduced by metal plate parts with high thermal conductivity and low specific weight attached by a thermally conductive joint to the side walls connecting the upper wall and the lower wall of the laser head. The laser head with limited deflection during temperature changes is solved in such a way that metal plate parts (4) with high thermal conductivity and low specific weight are attached by a heat- conducting connection to the side walls (1) connecting the warmer upper wall (2) and the colder lower wall (3) of the laser head.
The method far limiting the deflection of the laser head during temperature changes is solved in such a way that the temperature difference between the warmest upper wall and the coldest lower wall of the laser head is reduced by metal plate parts with high thermal conductivity and low specific weight attached by a thermally conductive joint to the side walls connecting the upper wall and the lower wall of the laser head. The laser head with limited deflection during temperature changes is solved in such a way that metal plate parts (4) with high thermal conductivity and low specific weight are attached by a heat- conducting connection to the side walls (1) connecting the warmer upper wall (2) and the colder lower wall (3) of the laser head.
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