Abstract: A compact night vision binoculars with a first eyepiece channel and a second eyepiece channel and including: an optical separator (8), positioned at the output of a light intensifier tube (2); a plane of reflection (8?) common to the first optical channel (BYZC) and the second optical channel (BCW); a first optical combination comprising two first convergent groups (V1, V2) positioned on either side of a first reflective angled surface (5); a second reflective angled surface (6); a second optical combination comprising two second convergent groups (V1?, V2?) positioned on either side of the common plane of reflection (8?); and a third reflective angled surface (7).

Abstract: The invention relates to compact night vision binoculars with a first eyepiece channel and a second eyepiece channel, comprising: an optical separator (8), positioned at the output of a light intensifier tube (2), a plane of reflection (8?) common to the first optical channel (BYZC) and the second optical channel (BCW); a first optical combination comprising two first convergent groups (V1, V2) positioned on either side of a first reflective angled surface (5), a second reflective angled surface (6); a second optical combination comprising two second convergent groups (V1?, V2?) positioned on either side of the common plane of reflection (8?); and a third reflective angled surface (7).

Abstract: The present invention relates to a vacuumable gel that can be used for decontaminating surfaces, and also to the use of this gel. The decontamination may be, for example, a radioactive decontamination. The gel of the present invention is composed of a colloidal solution. It comprises from 5 to 25 wt % of an inorganic viscosity modifier relative to the total weight of the gel; from 0.01 to 0.2 wt % of a surfactant relative to the total weight of the gel, and, particularly preferably, a surfactant in an amount strictly below 0.1 wt % relative to the total weight of the gel; from 0.5 to 7 mol, per litre of gel, of an inorganic acid or base; and optionally from 0.05 to 1 mol, per litre of gel, of an oxidizer having a standard redox potential E0 greater than 1.4 V in a strong acid medium or of the reduced form of this oxidizer; the remainder being water. It may be applied, by spraying, to a surface to be decontaminated, and removed in the form of dry residues by suction or brushing after drying.

Abstract: An optronic observation device including a detector having a photocathode and a sensor arranged to receive an incident light beam. The device also including a switch to position an optical element opposite the detector in the pathway of the incident beam or to retract the optical element and a focusing element to focus an incident ray on the photocathode when the optical element is in a retracted position. When the optical element is positioned opposite the detector, it is able to focus the beam on the sensor and to filter the beam spectrally to block all or part of the wavelengths for which the responsiveness of the photocathode is greater than a given threshold.

Abstract: The invention concerns an optronic observation device comprising a detector, the detector comprising a photocathode and a sensor arranged to receive an incident light beam, the device also comprising switching means able to position an optical element opposite said detector on the pathway of the incident beam or to retract said element, the device comprising means able to focus an incident ray on the photocathode when the element is in retracted position, characterized in that the element, when positioned opposite the detector, is able to focus the beam on the sensor and to filter the beam spectrally to block all or part of the wavelengths for which the responsiveness of the photocathode is greater than a given threshold.

Abstract: The invention relates to a composition which makes it possible to obtain a gelled aqueous foam capable of decontaminating, stripping or degreasing a surface. The composition of the present invention comprises one or more surfactants, one or more acidic or basic reactants and a gelling agent. The decontamination foam obtained from this composition exhibits long lifetimes, generally of between 1 and 10 hours, guaranteeing a prolonged time of action on the surface and a high decontamination effectiveness. These foams can be used to remove the radioactivity from an inaccessible plant, which is large in size and complex in design, by simple filling or by simple spraying over an accessible surface.

Abstract: The present invention related to a method for treating a surface with a gel, as well as to a treatment gel. The treatment may be a decontamination, etching or surface degreasing treatment, for example. The method comprises in this order, the following steps: applying the treatment gel on the surface to be treated, maintaining the treatment gel on the surface to be treated at a temperature and relative humidity such that the gel dries by breaking up and that it has the time to treat the surface before forming a dry and solid residue, and removing the dry and solid residue from the treated surface by suction or brushing. The gel comprises a viscosing agent, a treatment agent and optional an oxidizing agent.

Abstract: The present invention relates to a method for treating a surface with a gel, as well as to a treatment gel.

Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.

Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.

Abstract: The invention relates to sulphonated polyimides, notably of formula (I) 1

Abstract: The invention relates to sulphonated polymides, notably of formula (I) 1

Abstract: The invention relates to sulphonated polyimides, notably of formula (I) The invention also relates to an ion exchange membrane that includes such a polyimide and a fuel cell that includes such a membrane. The membranes of the invention have excellent durability and low cost and the fuel cells can be used, in particular, in electric vehicles.

Abstract: A process for depositing a thin layer of a ceramic composition on a substrate, which comprises:a) dissolving basic constituents of the ceramic composition, which are added in simple or mixed form to a solvent;b) adding to the solution, acetylacetone and hexamethylene tetramine in proportions suitable to the deposit method used;c) maturing or polymerizing the substance obtained in step b);d) depositing a layer of the substance on a substrate;e) drying the deposited layer, andf) sintering the layer deposited at low temperature.