Pair of protective glasses against ionizing radiation

Abstract

The invention relates to a pair of protective glasses (1) against ionizing radiation, comprising a first frame (2) having a first front part (21), a first side part (22) and a second side part (23), in which the first frame comprises a first filler capable of absorbing ionizing radiation, in which the first front part carries a first mineral glass and a second mineral glass, the first and second mineral glasses comprising a second filler capable of absorbing ionizing radiation, the first front part comprising a bridge piece (24) located between the two mineral glasses, in which a second frame (3) is fixed on the bridge piece of the first front part, the second frame carrying a third glass (31) and a fourth glass (32), the third and fourth glasses being located opposite the first and second mineral glasses. Figure for the abstract: Fig. 1

Description

Title of the invention: Pair of protective glasses against ionizing radiation Technical field

[0001] The invention relates to the field of personal protection against ionizing radiation. More particularly, the invention relates to the field of protective glasses against ionizing radiation. Technological background

[0002] There are a plurality of individual protective devices for protecting parts of an agent's body from ionizing radiation present in his environment. These protective devices are important in that they make it possible to reduce the risks of harmful effects on the agent's health that may be the consequence of exposure to ionizing radiation. The harmful effects are, for example: skin burns, acute radiation syndrome (AIS) or cancer. Indeed, beyond certain thresholds, ionizing radiation can alter the functioning of tissues and / or organs.

[0003] In addition to protection against these ionizing radiations, the protective devices must allow the agent to work in good conditions, that is to say with safety and comfort. Thus, certain devices must be personalized. An example of a protective device is protective glasses against ionizing radiation which must be adapted to the agent's vision, for example by applying a visual correction.

[0004] Document FR3080215A1 discloses in particular protective glasses against ionizing radiation comprising a frame of protective glasses against ionizing radiation, comprising a front part extending laterally by two lateral protection elements, and a device for holding the frame on the face of a user in wearing condition. The front part and the lateral protection elements are made of a radiation-attenuating material. The protective glasses comprise mineral lenses which may include an optical correction.

[0005] However, the protective glasses against ionizing radiation known to date are not satisfactory.

[0006] Indeed, mineral lenses are complex lenses to which it is difficult to apply a correction. Thus, the cost, manufacturing time and therefore delivery times of this type of glasses are significant. In addition, this type of glasses has a curvature which induces aberrations and optical deformations which can be amplified for wearers of corrective mineral lenses.

[0007] Furthermore, applying visual correction to this type of glasses increases the weight of the mineral lenses and therefore of the protective glasses, which is not comfortable for the user.

[0008] On the other hand, mineral glasses are heavy, brittle and therefore dangerous for the user.

[0009] It is therefore appropriate to solve the above-mentioned problems. Summary

[0010] One idea behind the invention is to solve one or more of the aforementioned problems.

[0011] Another idea underlying the invention is to provide an improved pair of ionizing radiation protection glasses.

[0012] Another idea underlying the invention is to provide a pair of ionizing radiation protection glasses that is safe for its user.

[0013] Another idea underlying the invention is to provide a pair of ionizing radiation protection glasses that is robust and durable over time.

[0014] Another idea underlying the invention is to provide a pair of ionizing radiation protection glasses that is easy to manufacture, especially when an optical correction has to be applied.

[0015] Another idea underlying the invention is to provide a pair of ionizing radiation protection glasses that is ergonomic.

[0016] According to one embodiment, the invention provides a pair of protective glasses against ionizing radiation comprising a first frame having a first front portion, a first lateral portion and a second lateral portion extending respectively from a first and a second lateral end of the first front portion, wherein the first mount comprises a first charge capable of absorbing ionizing radiation, in which the first front part carries a first mineral glass and a second mineral glass, the first and second mineral glasses comprising a second filler capable of absorbing ionizing radiation, the first front part comprising a bridge piece located between the two mineral glasses, wherein a second frame is fixed to the bridge piece of the first front part so as to be positioned opposite the first front part and to be interposed between the first frame and the eyes of a user, the second frame carrying a third lens and a fourth lens, the third and fourth lenses being located opposite the first and second mineral lenses.

[0017] Thanks to these characteristics, the pair of protective glasses is worn by the user in complete safety. Indeed, if a mineral glass breaks, the eyes of The user would be protected from glass shards via the second frame carrying the third and fourth lenses. In addition, the pair of protective glasses can be moved, stored and stored safely. Indeed, the second frame carrying the third and fourth lenses mechanically protects the mineral lenses from possible impacts.

[0018] According to embodiments, such a pair of protective glasses against ionizing radiation may comprise one or more of the following characteristics.

[0019] According to one embodiment, the bridge piece comprises a first and a second orifices spaced from each other, and the second mount comprises a third and a fourth orifices located opposite the first and second orifices, in which the second mount is fixed to the bridge piece via respectively a first rod housed in the first orifice and the third orifice, and a second rod housed in the second orifice and the fourth orifice.

[0020] Thus, the second mount is securely attached to the bridge piece of the first mount and the attachment is discreet and not bulky.

[0021] According to one embodiment, the first and second orifices are spaced apart by a distance of between 2 and 15 mm, preferably between 4 and 8 mm, for example 6.2 mm.

[0022] According to one embodiment, the first and second orifices have a diameter of between 0.5 and 2 mm, preferably a diameter of 1.3 mm.

[0023] According to one embodiment, the third and fourth orifices have a diameter of between 0.5 and 2 mm, preferably a diameter of 1.3 mm.

[0024] According to one embodiment, the first rod and the second rod have a length of between 5 mm and 10 mm, preferably 7 mm. According to one embodiment, the first rod and the second rod have a diameter of between 0.5 and 2 mm, preferably a diameter of 1.2 mm.

[0025] According to one embodiment, the first and second orifices are threaded and the first rod and the second rod comprise a thread corresponding to the first and second threaded orifices respectively.

[0026] Thus, the second mount is held to the bridge piece of the first mount via a robust attachment with significant mechanical friction preventing the first and second mounts from becoming detached.

[0027] According to one embodiment, the first rod and / or the second rod is a screw.

[0028] According to one embodiment, the pair of protective glasses comprises a bridge of nose fixed on the second mount via the first rod and the second rod.

[0029] Thus, the pair of protective glasses is more ergonomic.

[0030] According to one embodiment, the nose bridge is made from plastic material.

[0031] According to one embodiment, the nose bridge comprises a third filler capable to absorb ionizing radiation.

[0032] According to one embodiment, one end of the first rod and one end of the second rod are glued to the bridge piece. Thus, the attachment of the second mount to the bridge piece of the first mount is more robust.

[0033] According to one embodiment, one end of the first rod and one end of the second rod are glued to the nose bridge.

[0034] According to one embodiment, a first magnet is fixed to the bridge piece and a second magnet is fixed to the second mount, opposite the first magnet, the first and second magnets being arranged to assemble the first mount to the second mount by a magnetic attraction force.

[0035] Thus, the mechanical forces exerted on the first and second rods are supplemented by the magnetic attraction force of the magnets.

[0036] According to one embodiment, the first magnet and the second magnet are in contact with each other or spaced apart by an air gap.

[0037] According to one embodiment, the first filler and the second filler comprise particles of at least one material selected from: lead, rare earths, bismuth, antimony, tin, tungsten, barium, tantalum, alloys and oxides thereof. According to a preferred embodiment, the first filler and the second filler comprise lead particles.

[0038] According to one embodiment, the first charge is located on or in: the front part, the first lateral part and / or the second lateral part. Preferably, the first charge is located at least in the front part.

[0039] According to one embodiment, the second filler is located on or in the first and second mineral glasses.

[0040] According to one embodiment, the third and fourth glasses are made from transparent plastic material, preferably from a thermoplastic polymer.

[0041] According to one embodiment, the third and fourth glasses are made from polycarbonate.

[0042] Thus, the third and fourth glasses have excellent mechanical properties, in particular resistance to shocks and twisting. In addition, polycarbonate has excellent thermal properties allowing use between -100°C and 120°C. In addition, polycarbonate lenses have high resistance over time against scratches, despite daily handling by the user. Additionally, polycarbonate lenses are easy to maintain, resistant to dust and water drops. Finally, polycarbonate lenses provide protection against radiation. ultraviolet (UV).

[0043] According to one embodiment, the third lens and / or the fourth lens has a visual correction.

[0044] Thanks to these characteristics, visual correction is easy to apply. Thus, it is not necessary to carry out visual correction on complex and brittle mineral glasses. The production costs of mineral glasses for protection against ionizing radiation can therefore be reduced, in comparison with the cost of visual correction which would be applied to mineral glasses.

[0045] According to one embodiment, the third lens and / or the fourth lens corrects a visual defect chosen from: myopia, hyperopia, isolated astigmatism or astigmatism associated with myopia or hyperopia, or presbyopia isolated or associated with myopia, hyperopia and / or astigmatism. The third and fourth lenses may be single-focus, bifocal or progressive.

[0046] In one variant, visual correction can be applied to both the third and fourth lenses and the mineral lenses, thereby increasing the possibilities for optical correction.

[0047] According to one embodiment, the first lateral part is a first eyeglass branch and the second lateral part is a second eyeglass branch, said first and second eyeglass branches being attached to the first front part via a first hinge and a second hinge respectively.

[0048] Thus, the protective glasses are more ergonomic. In addition, thanks to these characteristics, the first and second branches of the glasses can be folded safely without risking hitting the first and second mineral lenses and therefore without risking breaking said first and second mineral lenses. Indeed, the third and fourth lenses of the second frame make it possible in particular to protect the first and second mineral lenses from mechanical shocks.

[0049] According to one embodiment, the second mount has smaller dimensions than the first mount.

[0050] According to one embodiment, the second frame has a length of less than 15 cm, for example 12 cm.

[0051] According to one embodiment, the second mount has a mass less than 15 grams, preferably less than 10 grams, for example 9 grams.

[0052] According to one embodiment, the front part of the first frame has a length of less than 20 cm, for example 15 cm. According to one embodiment, the front part of the first frame has a height of between 3 and 10 cm.

[0053] According to one embodiment, the glasses branches have a length of at least 5 cm, for example between 5 and 15 cm.

[0054] According to one embodiment, the pair of glasses provides protection against ionizing radiation chosen from X-type or gamma-type electromagnetic radiation.

[0055] According to one embodiment, the pair of protective glasses against ionizing radiation is used in the field of medicine, in particular, in diagnostic radiology, in interventional radiology, in radiotherapy or in brachytherapy or in nuclear medicine, by the healthcare personnel and / or by the personnel being treated.

[0056] According to one embodiment, the pair of protective glasses against ionizing radiation is used in the field of civil or military nuclear energy, in particular for mining activities or for the processing and manufacture of nuclear fuels.

[0057] According to one embodiment, the invention also provides a method of manufacturing a pair of protective glasses against ionizing radiation, the method comprising the following steps: from a first mount having a first front portion, a first side portion and a second side portion extending respectively from a first and a second side end of the first front portion, wherein the first mount comprises a first charge capable of absorbing ionizing radiation, in which the first front part carries a first mineral glass and a second mineral glass, the first and second mineral glasses comprising a second filler capable of absorbing ionizing radiation, the first front part comprising a bridge piece located between the two mineral glasses, providing a second frame carrying a third lens and a fourth lens, fixing the second frame on the first frame at the bridge piece so as to be positioned opposite the first front part, so as to be interposed between the first frame and the eyes of a user and so that the third and fourth lenses of the second frame are located opposite the first and second mineral lenses.

[0058] According to one embodiment of the method, the bridge piece comprises a first and a second tapped orifices spaced from each other receiving a first and second threaded rods, fixing a nose bridge to said first mount, the method further comprising: unscrew the first threaded rod and the second threaded rod from the first frame to remove the nose bridge, and wherein the second mount has a third and a fourth orifice, the method further comprising: superimpose said third and fourth orifices with the first and second threaded holes, securing the nose bridge to the second mount and securing the second mount to the first mount via third and fourth rods comprising a thread, wherein the third and fourth rods comprising a thread have a greater length than the first and second threaded rods.

[0059] According to one embodiment of the method, the method further comprises: applying glue to one end of the first rod and one end of the second rod.

[0060] According to one embodiment of the method, the third and fourth orifices are made by drilling, by applying upstream a drilling guide making it possible to guide the drilling. Brief description of the figures

[0061] The invention will be better understood, and other aims, details, characteristics and advantages thereof will appear more clearly during the following description of several particular embodiments of the invention, given solely for illustrative and non-limiting purposes, with reference to the appended drawings.

[0062] [Fig-1] [Fig.l] represents a top perspective view of a pair of glasses protection against ionizing radiation, according to one embodiment.

[0063] [Fig.2] [Fig.2] is a front view of the pair of safety glasses of [Fig.l].

[0064] [Fig.3] [Fig.3] is an exploded, top, perspective view of the pair of protective glasses illustrated in Figures 1 and 2. Description of the embodiments

[0065] Figures 1 and 2 disclose a pair of protective glasses 1 against ionizing radiation. The pair of protective glasses 1 comprises a first frame 2, a second frame 3 and a nose bridge 4.

[0066] The first frame 2 comprises a first front part 21 from which a first spectacle branch 22 extends from a first lateral end of the front part 21 and from which a second spectacle branch 23 extends from a second lateral end of the front part 21. The first and second spectacle branches 22 and 23 have a shape suitable for being correctly positioned on the user's ears, for example via a curvature having a concavity.

[0067] The first and second spectacle arms 22 and 23 are fixed respectively to the first and second lateral ends of the front part 21 by a first hinge 25 and a second hinge 26. The first and second hinges 25 and 26 allow a first rotational movement making it possible to fold inwardly the first and second branches of glasses 22 and 23, and allows a second movement allowing the first and second branches 22 and 23 of glasses to be repositioned in a position of use. The first and second hinges 25 and 26 block the other possibilities of movement of the branches, for example an outward rotational movement, that is to say a movement opposite to the first movement, when the first and second branches 22 and 23 are in the position of use.

[0068] The first frame 2 is entirely made of a plastic material which includes a first filler allowing in particular the absorption of X and gamma radiation, for example a lead filler.

[0069] The first front part 21 carries a first mineral glass 27 and a second mineral glass 28 spaced from each other by a first bridge piece 24. The first and second mineral glasses 27 and 28 are made from a transparent mineral material which includes a second filler allowing in particular the absorption of X and gamma radiation, for example a lead filler.

[0070] The first mount 2 further comprises a first threaded orifice 41 and a second threaded orifice 42 and spaced from each other as illustrated in [Fig. 3]. The first and second threaded orifices 41 and 42 participate in the fixing of the second mount 3 and the nose bridge 4.

[0071] The second frame 3 carries a third polycarbonate lens 31 and a fourth polycarbonate lens 32, spaced from each other by a second front part 33.

[0072] The second mount 3 further comprises a third orifice 43 and a fourth orifice 44 located respectively on the second bridge piece 33 and opposite the first and second orifices 41 and 42.

[0073] Similarly, the nose piece 4 comprises a fifth orifice 45 and a sixth orifice 46 located respectively opposite the third and fourth orifices 43 and 44.

[0074] The nose piece 4 is fixed against the second bridge piece 33 of the second mount 3 and the second mount 3 is fixed against the first bridge piece 24 of the first mount 2, via: on the one hand, a first rod 47 comprising a thread, the first rod 47 consecutively passing through the fifth orifice 45 and the third orifice 43, the first rod 47 being received then screwed into the first tapped orifice 41, and on the other hand, a second rod 48 comprising a thread passing consecutively through the sixth orifice 46 and the fourth orifice 44, the second rod 48 being received then screwed into the second threaded orifice 42. In a variant, the fixing is further fixed by coating at least part of the first rod 47 and the second rod 48 with glue.

[0075] The third and fourth polycarbonate lenses have, for example, when no visual correction is applied, the following parameters: - refractive index: 1.591 - solubility parameter ô: 20.3 J l / 2-cm-3 / 2 - dielectric constant: 3.17 (60 Hz); 2.92 (1 k...) - Glass transition temperature: 140°C.

[0076] The third and fourth lenses may comprise visual correction independently of each other, according to known techniques in the field of vision correction.

[0077] The ionizing radiation protection glasses described herein can be manufactured in different ways. A manufacturing process will be described below.

[0078] A manufacturing process for the ionizing radiation protection glasses comprises the following steps: from a first mount having the above-mentioned characteristics, for example a first mount described in document FR3080215A1, unscrew the nose bridge, provide a second frame with the above-mentioned characteristics. The two polycarbonate lenses can be integrated into the second frame by following these steps: "feel" the second frame to memorize the dimensions and transmit the information to the grinder, then cut the two polycarbonate lenses to the dimensions allowing them to be integrated into the second frame. Next, suction the two polycarbonate lenses intended to be integrated into the second frame, then bevel the polycarbonate lenses in front face mounting 35% to ensure a good hold of the polycarbonate lens in the second frame. Next, grind the polycarbonate lenses then clean the lenses and finally integrate the lenses into the second frame.

[0079] In an alternative embodiment, the second frame is purchased commercially and includes hooks. In this embodiment, the hooks are cut out in order to keep only the frame intended to carry two lenses. The areas where the hooks have been cut out are filed down to make them smooth.

[0080] The method further comprises a step of positioning a self-adhesive drilling guide on a surface of the second mount in order to guide the drilling of two holes.

[0081] Finally, fix the nose bridge on the second frame and fix the second frame on the first frame via two rods in order to finalize the manufacture of a pair of protective glasses against ionizing radiation.

[0082] Although the invention has been described in connection with several particular embodiments, it is quite obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these fall within the scope of the invention.

[0083] The use of the verb “comport” or “comprendre” and its conjugated forms does not exclude the presence of other elements or other steps than those stated in a claim.

[0084] In the claims, any reference sign in parentheses cannot be interpreted as a limitation of the claim.

[0085]

Claims

Claims

1. Pair of protective glasses (1) against ionizing radiation comprising a first frame (2) having a first front part (21), a first lateral part (22) and a second lateral part (23) extending respectively from a first and a second lateral end of the first front part (21), in which the first frame (2) comprises a first filler capable of absorbing ionizing radiation, in which the first front part (21) carries a first mineral glass (27) and a second mineral glass (28), the first and second mineral glasses (27, 28) comprising a second filler capable of absorbing ionizing radiation, the first front part (21) comprising a bridge piece (24) located between the two mineral glasses (27, 28),wherein a second frame (3) is fixed to the bridge piece (24) of the first front part (21) so as to be positioned opposite the first front part (21) and to be interposed between the first frame (2) and the eyes of a user, the second frame (3) carrying a third lens (31) and a fourth lens (32), the third and fourth lenses (31, 32) being located opposite the first and second mineral lenses (27, 28), wherein the bridge piece (24) has a first and a second orifice (41, 42) spaced from each other, and the second frame (3) has a third and a fourth orifice (43, 44) located opposite the first and second orifices (41, 42), wherein the second frame (3) is fixed to the bridge piece (24) via respectively a first rod (47) housed in the first orifice (41) and the third orifice (43),and a second rod (48) housed in the second hole (42) and the fourth hole (44), the pair of protective glasses (1) comprising a nose bridge fixed (4) on the second frame (3) via the first rod (47) and the second rod (48).,

2. A pair of protective glasses according to claim 1, wherein the first and second holes (41, 42) are threaded and wherein the first rod (47) and the second rod (48) comprise a thread corresponding to the first and second threaded holes (41, 42) respectively.

3. A pair of protective glasses according to one of claims 1 to 2, wherein one end of the first rod (47) and one end of the second rod (48) are bonded to the bridge piece (24).

4. Pair of protective glasses according to one of claims 1 to 3, in which a first magnet is fixed on the bridge piece (24) and a second magnet is fixed on the second frame (3), opposite the first magnet, the first and second magnets being arranged to assemble the first frame (2) to the second frame (3) by a magnetic attraction force.

5. A pair of protective glasses according to one of claims 1 to 4, wherein the first filler and the second filler comprise particles of at least one material chosen from: lead, rare earths, bismuth, antimony, tin, tungsten, barium, tantalum, alloys and oxides thereof.

6. A pair of protective glasses according to one of claims 1 to 5, wherein the third and fourth lenses (31, 32) are made from transparent plastic material.

7. A pair of protective glasses according to claim 6, wherein the third and fourth lenses (31, 32) are made from polycarbonate.

8. Pair of protective glasses according to one of claims 1 to 7, in which the third lens (31) and / or the fourth lens (32) has a visual correction.

9. Pair of protective glasses according to one of claims 1 to 8, in which the first lateral part (22) is a first spectacle branch and the second lateral part (23) is a second spectacle branch, said first and second spectacle branches (22, 23) being attached to the first front part (21) via respectively a first hinge (25) and a second hinge (26).

10. A method of manufacturing a pair of glasses for protection against ionizing radiation, the method comprising the following steps: providing a second frame (3) carrying a third lens (31) and a fourth lens (32), fixing the second frame (3) to a first frame (2) having a first front part (21), a first side part (22) and a second side part (23) extending respectively from a first and a second lateral end of the first front part (21), wherein the first mount (2) comprises a first load capable of absorbing ionizing radiation, in which the first front part (21) carries a first mineral glass (27) and a second mineral glass (28), the first and second mineral glasses (27, 28) comprising a second filler capable of absorbing ionizing radiation, the first front part (21) comprising a bridge piece (24) located between the two mineral glasses (27, 28), the second frame (3) being fixed on the first frame (2) at the bridge piece (24) so ​​as to be positioned opposite the first front part (21), so as to be interposed between the first frame (2) and the eyes of a user and so that the third and fourth lenses (31, 32) of the second frame (3) are located opposite the first and second mineral lenses (27, 28), wherein the bridge piece comprises first and second tapped and spaced apart holes (41, 42) receiving first and second threaded rods, fixing a nose bridge (4) to said first mount (2), the method further comprising: unscrew the first threaded rod and the second threaded rod from the first mount (2) to remove the nose bridge (4), and wherein the second mount (3) has a third and a fourth orifice (43, 44), the method further comprising: superimposing said third and fourth orifices (43, 44) with the first and second threaded orifices (41, 42), fixing the nose bridge (4) on the second mount (3) and fixing the second mount (3) on the first mount (2) via a third and a fourth rods comprising a thread (47, 48), wherein the third and the fourth rods (47, 48) comprising a thread have a greater length than the first and second threaded rods.

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