WO2016139411A1 - Camera suitable for working in a radioactive environment - Google Patents

Camera suitable for working in a radioactive environment Download PDF

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Publication number
WO2016139411A1
WO2016139411A1 PCT/FR2016/050452 FR2016050452W WO2016139411A1 WO 2016139411 A1 WO2016139411 A1 WO 2016139411A1 FR 2016050452 W FR2016050452 W FR 2016050452W WO 2016139411 A1 WO2016139411 A1 WO 2016139411A1
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WO
WIPO (PCT)
Prior art keywords
sensors
image
mirror
sensor
capture
Prior art date
Application number
PCT/FR2016/050452
Other languages
French (fr)
Inventor
Guillaume DEJAVDAN
Original Assignee
Ermes
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ermes filed Critical Ermes
Priority to CN201680023896.2A priority Critical patent/CN107534720A/en
Publication of WO2016139411A1 publication Critical patent/WO2016139411A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
    • G01T1/16—Measuring radiation intensity
    • G01T1/24—Measuring radiation intensity with semiconductor detectors
    • G01T1/244—Auxiliary details, e.g. casings, cooling, damping or insulation against damage by, e.g. heat, pressure or the like
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/45—Cameras or camera modules comprising electronic image sensors; Control thereof for generating image signals from two or more image sensors being of different type or operating in different modes, e.g. with a CMOS sensor for moving images in combination with a charge-coupled device [CCD] for still images

Definitions

  • the invention lies in the field of devices for taking images especially in the visible range, even when the device is in a radioactive environment.
  • the object of the invention is to provide a device for taking, particularly in the field of visible light, fixed or moving images, in a radioactive environment.
  • a device for capturing an image in a radioactive environment comprises at least two image sensors, means for exposing each sensor alternately, and means for regenerating the sensors, preferably by heating, so that One sensor is available to take one image while another is regenerated.
  • such a device comprises:
  • a movable mirror between at least two positions, each position being provided for exposing a respective sensor
  • It may further comprise a shield pierced with an orifice for the passage of light, the sensors being disposed at the rear of said shield to be protected from parasitic radiation.
  • the orifice is advantageously provided with an optical objective adapted to form a sharp image on each of the sensors.
  • the mirror may be rotatable about an optical axis of this orifice.
  • the sensors are adapted to capture an image in the field of visible light.
  • the sensors are adapted to capture an image of gamma radiation. This is particularly advantageous for locating a source of gamma radiation on an image in visible light.
  • Each sensor may comprise regeneration means that are specific to it.
  • the invention also relates to a camera, characterized in that it comprises a capture device according to the invention.
  • FIG. 1 shows schematically a device according to the invention, in a first position
  • FIG. 1 shows schematically the device of Figure 1, in a second position.
  • FIGS. 1 and 2 illustrate an example of a device 1 for capturing an image of visible light, illustrated by a radius R.
  • This device 1 is adapted for use in a camera subjected to radioactive radiation.
  • This device comprises two sensors 11, 12 and a mirror 13 rotatably mounted between the sensors.
  • the sensors 11, 12 are arranged at the rear of a shield 15 pierced with an orifice 16 allowing the passage of the light R.
  • the mirror 13 is rotatably mounted around an optical axis X16 of the orifice 16, between a first position, illustrated in FIG. 1, and a second position, illustrated in FIG. light, and particularly the radius R, is supposed to hit the mirror in a direction parallel to the optical axis X16.
  • the mirror makes it possible to return the light, and particularly the ray R, passing through the orifice 16 towards the first sensor 1.
  • the mirror makes it possible to send back the light, and particularly the ray R, passing through it. the orifice 16 to the second sensor 12.
  • Each sensor is disposed at the rear of the shield 15, so that it is protected from parasitic radiation, that is to say it receives essentially, and preferably only, the light reflected by the mirror 13.
  • each sensor 11, 12 is substantially plane and the mirror 13 is arranged to return the light substantially perpendicularly to the plane of the sensor.
  • Each sensor further comprises its own regeneration means 17; in this example, they are means of regeneration by heating.
  • they are means of regeneration by heating.
  • the mirror pivots around the optical axis A16 until it takes the second position, illustrated in FIG. sensor 12 is able to capture an image, while the first sensor 11 undergoes a first regeneration step by heating, then a possible second cooling step.
  • the device 1 can equip a camera or a camera, the orifice 16 being advantageously provided with an optical objective, in order to obtain a sharp image in the plane of each sensor.
  • the mirror can be rotatable about an axis perpendicular to the optical axis, so that it can be tilted between two positions, each of which with respect to a respective sensor.

Abstract

The invention relates to a device for capturing an image in a radioactive environment, comprising: at least two image sensors (11, 12); a mirror (13) that can be moved between at least two positions, each position being used to expose a respective sensor; and means (17) for regenerating said sensors, preferably by heating. The invention also relates to a camera comprising such a device and particularly a camera suitable for recording an image of a gamma radiation source in a nuclear environment.

Description

CAMERA ADAPTEE POUR TRAVAILLER DANS UN CAMERA SUITABLE FOR WORKING IN A
ENVIRONNEMENT RADIOACTIF. RADIOACTIVE ENVIRONMENT.
L'invention se situe dans le domaine des dispositifs permettant de prendre des images notamment dans le domaine du visible, même lorsque le dispositif est dans un environnement radioactif. The invention lies in the field of devices for taking images especially in the visible range, even when the device is in a radioactive environment.
Les caméras actuelles sont sensibles aux environnements radioactifs ; notamment, leur capteur est vite saturé ou détruit trop rapidement pour qu'une telle caméra puisse être utilisée dans un tel environnement. Les radiations forment des points correspondant à des impacts successifs de particules gamma sur le capteur, l'image ayant de ce fait un aspect neigeux. Du fait d'une rémanence importante, l'image se remplit progressivement de points jusqu'à en être saturée, c'est-à-dire sensiblement uniformément colorée, de sorte que cette image n'est plus exploitable. Current cameras are sensitive to radioactive environments; in particular, their sensor is quickly saturated or destroyed too quickly for such a camera can be used in such an environment. The radiation forms points corresponding to successive impacts of gamma particles on the sensor, the image thus having a snowy appearance. Due to a significant remanence, the image is gradually filled with points until saturated, that is to say substantially uniformly colored, so that this image is no longer exploitable.
Le but de l'invention est de proposer un dispositif permettant de prendre, particulièrement dans le domaine de la lumière visible, des images fixes ou mobiles, dans un environnement radioactif. The object of the invention is to provide a device for taking, particularly in the field of visible light, fixed or moving images, in a radioactive environment.
Plusieurs solutions sont apparues. En particulier, il est apparu que certains composants électroniques, notamment des capteurs d'images, peuvent être régénérés après qu'ils aient été soumis à un rayonnement de type gamma. Une telle régénération peut être obtenue par chauffage. Selon l'invention, un dispositif de capture d'une image dans un environnement radioactif comprend au moins deux capteurs d'image, des moyens pour exposer chaque capteur alternativement, et des moyens pour régénérer les capteurs, de préférence par chauffage, de sorte qu'un capteur est disponible pour prendre une image pendant qu'un autre est régénéré. Several solutions appeared. In particular, it has been found that certain electronic components, especially image sensors, can be regenerated after they have been subjected to gamma radiation. Such regeneration can be obtained by heating. According to the invention, a device for capturing an image in a radioactive environment comprises at least two image sensors, means for exposing each sensor alternately, and means for regenerating the sensors, preferably by heating, so that One sensor is available to take one image while another is regenerated.
Avantageusement, un tel dispositif comprend : Advantageously, such a device comprises:
- au moins deux capteurs d'image,  - at least two image sensors,
- un miroir mobile entre au moins deux positions, chaque position étant prévue pour exposer un capteur respectif, et,  a movable mirror between at least two positions, each position being provided for exposing a respective sensor, and
- des moyens pour régénérer, de préférence par chauffage, lesdits capteurs.  means for regenerating, preferably by heating, said sensors.
Il peut en outre comprendre un blindage percé d'un orifice pour le passage de la lumière, les capteurs étant disposés à l'arrière dudit blindage pour être protégés de radiations parasites. L'orifice est avantageusement muni d'un objectif optique adapté à former une image nette sur chacun des capteurs. Le miroir peut être mobile en rotation autour d'un axe optique de cet orifice. It may further comprise a shield pierced with an orifice for the passage of light, the sensors being disposed at the rear of said shield to be protected from parasitic radiation. The orifice is advantageously provided with an optical objective adapted to form a sharp image on each of the sensors. The mirror may be rotatable about an optical axis of this orifice.
De préférence, les capteurs sont adaptés pour capturer une image dans le domaine de la lumière visible. Preferably, the sensors are adapted to capture an image in the field of visible light.
Avantageusement, les capteurs sont adaptés pour capturer une image de radiations gamma. Ceci est particulièrement avantageux pour repérer une source de rayonnement gamma sur une image en lumière visible. Advantageously, the sensors are adapted to capture an image of gamma radiation. This is particularly advantageous for locating a source of gamma radiation on an image in visible light.
Chaque capteur peut comprendre des moyens de régénération qui lui sont propres. Each sensor may comprise regeneration means that are specific to it.
L'invention porte aussi sur une caméra, caractérisée en ce qu'elle comprend un dispositif de capture selon l'invention. Des modes de réalisation et des variantes seront décrits ci-après, à titre d'exemples non limitatifs, avec référence aux dessins annexés dans lesquels : The invention also relates to a camera, characterized in that it comprises a capture device according to the invention. Embodiments and variants will be described hereinafter, by way of non-limiting examples, with reference to the accompanying drawings in which:
- la figure 1 représente schématiquement un dispositif selon l'invention, dans une première position ; et, - Figure 1 shows schematically a device according to the invention, in a first position; and,
- la figure 2 représente schématiquement le dispositif de la figure 1, dans une deuxième position.  - Figure 2 shows schematically the device of Figure 1, in a second position.
Les figures 1 et 2 illustrent un exemple d'un dispositif 1 de capture d'une image d'une lumière visible, illustrée par un rayon R. Ce dispositif 1 est adapté pour être utilisé dans une caméra soumise à un rayonnement radioactif. Ce dispositif comprend deux capteurs 11, 12 et un miroir 13 monté rotatif entre les capteurs. Les capteurs 11, 12 sont disposés à l'arrière d'un blindage 15 percé d'un orifice 16 y permettant le passage de la lumière R. FIGS. 1 and 2 illustrate an example of a device 1 for capturing an image of visible light, illustrated by a radius R. This device 1 is adapted for use in a camera subjected to radioactive radiation. This device comprises two sensors 11, 12 and a mirror 13 rotatably mounted between the sensors. The sensors 11, 12 are arranged at the rear of a shield 15 pierced with an orifice 16 allowing the passage of the light R.
Dans l'exemple illustré, le miroir 13 est monté mobile en rotation autour d'un axe optique X16 de l'orifice 16, entre une première position, illustrée à la figure 1, et une deuxième position, illustrée à la figure 2. La lumière, et particulièrement le rayon R, est supposée heurter le miroir selon une direction parallèle à l'axe optique X16. Dans sa première position, le miroir permet de renvoyer la lumière, et particulièrement le rayon R, traversant l'orifice 16 vers le premier capteur 1. Dans sa deuxième position, le miroir permet de renvoyer la lumière, et particulièrement le rayon R, traversant l'orifice 16 vers le deuxième capteur 12. In the example illustrated, the mirror 13 is rotatably mounted around an optical axis X16 of the orifice 16, between a first position, illustrated in FIG. 1, and a second position, illustrated in FIG. light, and particularly the radius R, is supposed to hit the mirror in a direction parallel to the optical axis X16. In its first position, the mirror makes it possible to return the light, and particularly the ray R, passing through the orifice 16 towards the first sensor 1. In its second position, the mirror makes it possible to send back the light, and particularly the ray R, passing through it. the orifice 16 to the second sensor 12.
Chaque capteur est disposé à l'arrière du blindage 15, de sorte qu'il est protégé de radiations parasites, c'est-à-dire qu'il reçoit essentiellement, et de préférence seulement, la lumière réfléchie par le miroir 13. Dans l'exemple illustré, chaque capteur 11, 12 est sensiblement plan et le miroir 13 est disposé pour renvoyer la lumière sensiblement perpendiculairement au plan du capteur. Each sensor is disposed at the rear of the shield 15, so that it is protected from parasitic radiation, that is to say it receives essentially, and preferably only, the light reflected by the mirror 13. In the illustrated example, each sensor 11, 12 is substantially plane and the mirror 13 is arranged to return the light substantially perpendicularly to the plane of the sensor.
Chaque capteur comprend en outre ses propres moyens de régénération 17 ; dans cet exemple, ce sont des moyens de régénération par chauffage. Ainsi, lorsque le miroir est dans la première position, illustrée à la figure 1, le premier capteur 11 est en mesure de capturer une image, pendant que le deuxième capteur 12 subit une première étape de régénération par chauffage, puis une éventuelle deuxième étape de refroidissement. Each sensor further comprises its own regeneration means 17; in this example, they are means of regeneration by heating. Thus, when the mirror is in the first position, illustrated in FIG. 1, the first sensor 11 is able to capture an image, while the second sensor 12 undergoes a first regeneration step by heating, then a possible second step of cooling.
Lorsque l'image issue du premier capteur 11 est trop dégradée, ou avant qu'elle ne le soit, le miroir pivote autour de l'axe optique A16 jusqu'à prendre la deuxième position, illustrée à la figure 2. Ainsi, le deuxième capteur 12 est en mesure de capturer une image, pendant que le premier capteur 11 subit une première étape de régénération par chauffage, puis une éventuelle deuxième étape de refroidissement. When the image coming from the first sensor 11 is too degraded, or before it is, the mirror pivots around the optical axis A16 until it takes the second position, illustrated in FIG. sensor 12 is able to capture an image, while the first sensor 11 undergoes a first regeneration step by heating, then a possible second cooling step.
Le dispositif 1 selon l'invention peut équiper une caméra ou un appareil photo, l'orifice 16 étant avantageusement muni d'un objectif optique, afin d'obtenir une image nette dans le plan de chaque capteur. The device 1 according to the invention can equip a camera or a camera, the orifice 16 being advantageously provided with an optical objective, in order to obtain a sharp image in the plane of each sensor.
Bien sûr, l'invention n'est pas limitée aux exemples qui viennent d'être décrits. Of course, the invention is not limited to the examples which have just been described.
Selon les temps relatifs optimaux, pour l'exposition, le chauffage et le refroidissement, il peut être utile d'utiliser plus de deux capteurs, de sorte qu'un même capteur peut passer plus ou moins de temps dans une étape que dans une autre. Il peut ainsi être utile d'utiliser trois capteurs, l'un étant exposé pendant que dans le même temps, le deuxième est chauffé pour être régénéré pendant que le troisième est refroidi ; le miroir pouvant ainsi prendre trois positions, chacune en vis-à-vis d'un miroir respectif parmi les trois miroirs. En outre, au lieu d'affecter des moyens de régénération respectifs à chacun des capteurs, il est possible d'avoir des moyens de régénération uniques prévus pour se déplacer en même temps que le miroir. Depending on the optimal relative times, for exposure, heating, and cooling, it may be useful to use more than two sensors, so that one sensor may spend more or less time in one step than in another. . It can thus be useful to use three sensors, one being exposed while at the same time, the second is heated to be regenerated while the third is cooled; the mirror can thus take three positions, each vis-à-vis a mirror among the three mirrors. In addition, instead of assigning respective regeneration means to each of the sensors, it is possible to have unique regeneration means provided to move at the same time as the mirror.
Au lieu d'être mobile en rotation autour de l'axe optique, le miroir peut être mobile en rotation autour d'un axe perpendiculaire à l'axe optique, de sorte qu'il peut être basculé entre deux positions, chacune en vis-à-vis d'un capteur respectif. Instead of being mobile in rotation about the optical axis, the mirror can be rotatable about an axis perpendicular to the optical axis, so that it can be tilted between two positions, each of which with respect to a respective sensor.

Claims

Dispositif (1) pour capturer une image dans un environnement radioactif, caractérisé en ce qu'il comprend : Device (1) for capturing an image in a radioactive environment, characterized in that it comprises:
- au moins deux capteurs d'image (11, 12) ;  at least two image sensors (11, 12);
- un miroir (13) mobile entre au moins deux positions, chaque position étant prévue pour exposer un capteur respectif ; et, - a mirror (13) movable between at least two positions, each position being provided to expose a respective sensor; and,
- des moyens pour régénérer (17), de préférence par chauffage, lesdits capteurs. means for regenerating (17), preferably by heating, said sensors.
Dispositif selon la revendication 1, caractérisé en ce qu'il comprend un blindage (15) percé d'un orifice (16) pour le passage de la lumière, les capteurs étant disposés à l'arrière dudit blindage pour être protégés de radiations parasites. Device according to claim 1, characterized in that it comprises a shield (15) pierced with a hole (16) for the passage of light, the sensors being arranged at the rear of said shield to be protected from parasitic radiation.
Dispositif selon la revendication 2, caractérisé en ce que l'orifice est muni d'un objectif optique adapté à former une image nette sur chacun des capteurs. Device according to claim 2, characterized in that the orifice is provided with an optical objective adapted to form a sharp image on each of the sensors.
Dispositif selon l'une des revendications 2 ou 3, caractérisé en ce que le miroir est mobile en rotation autour d'un axe optique (XI 6) de l'orifice (16). Device according to one of claims 2 or 3, characterized in that the mirror is rotatable about an optical axis (XI 6) of the orifice (16).
Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que les capteurs sont adaptés pour capturer une image dans le domaine de la lumière visible. Device according to one of claims 1 to 4, characterized in that the sensors are adapted to capture an image in the field of visible light.
Dispositif selon l'une de revendications 1 à 5, caractérisé en ce que les capteurs sont adaptés pour capturer une image de radiations gamma. Device according to one of claims 1 to 5, characterized in that the sensors are adapted to capture a gamma radiation image.
Dispositif selon l'une de revendications 1 à 6, caractérisé en ce que chaque capteur comprend des moyens de régénération qui lui sont propres. Device according to one of claims 1 to 6, characterized in that each sensor comprises regeneration means which are specific thereto.
8. Caméra, caractérisée en ce qu'elle comprend un dispositif de capture (1) selon l'une des revendications précédentes. 8. Camera, characterized in that it comprises a capture device (1) according to one of the preceding claims.
PCT/FR2016/050452 2015-03-05 2016-02-29 Camera suitable for working in a radioactive environment WO2016139411A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201680023896.2A CN107534720A (en) 2015-03-05 2016-02-29 Suitable for the camera to be worked radioactive environment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1551862A FR3033467B1 (en) 2015-03-05 2015-03-05 CAMERA SUITABLE FOR WORKING IN A RADIOACTIVE ENVIRONMENT.
FR1551862 2015-03-05

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FR (1) FR3033467B1 (en)
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Cited By (1)

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CN112929515A (en) * 2019-12-05 2021-06-08 北京小米移动软件有限公司 Camera module and terminal equipment

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Publication number Priority date Publication date Assignee Title
FR3056060B1 (en) * 2016-09-13 2019-07-05 Ermes CAMERA ADAPTED TO WORK CONTINUOUSLY IN A RADIOACTIVE ENVIRONMENT.

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US8470089B2 (en) * 2008-03-31 2013-06-25 Saint-Gobain Cristaux Et Detecteurs Annealing of single crystals
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FR2971058A1 (en) * 2011-02-02 2012-08-03 Commissariat Energie Atomique SENSITIVE LOAD FOR PASSIVE DOSIMETRY, DOSIMETER HAVING SUCH SENSITIVE LOAD AND SYSTEM FOR READING ILLUMINATION OF SUCH SENSITIVE LOAD
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FR3033467A1 (en) 2016-09-09
FR3033467B1 (en) 2017-03-03

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