Glasses with enhanced peripheral vision, especially for ski goggles

Abstract

Glasses with enhanced peripheral vision, particularly for ski goggles. One aspect of the invention relates to a lens (10) comprising a first portion (11) having a constant radius of curvature along a first and a second direction (D1, D2), and a second portion (12) at the periphery of the first portion and having a smaller radius of curvature, possibly variable along the first and second directions. Figure to be published with the abstract: Figure 1

Description

Title of the invention: Glasses with improved peripheral vision, particularly for ski goggles. TECHNICAL FIELD OF THE INVENTION

[0001] The technical field of the invention is that of vision equipment, in particular for a sporting activity, such as sliding sports.

[0002] The present invention relates to a pair of glasses, in particular for a ski mask. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0003] The use of masks, or goggles, for sliding sports allows the wearer to maintain clear vision while practicing a sport, including when environmental conditions, typically weather conditions, are degraded.

[0004] Existing masks offer various types and shapes of lenses that provide high optical quality in the wearer's direct field of vision, that is, in the area of ​​the field of vision corresponding to binocular vision. The wearer is therefore not hindered by the presence of the lens when viewing their surroundings using binocular vision. This field of vision is generally considered to extend from 104° to -104° relative to the median axis between the individual's two eyes.

[0005] However, these masks are not suitable for allowing the wearer to perceive their environment using peripheral vision, that is, beyond the binocular field of vision. Peripheral vision corresponds to the areas of the monocular field of vision. Indeed, peripheral vision is blocked either by the frame itself, or by the geometry of the lens, which is not adapted for seeing in these peripheral areas, or by both.

[0006] Widening the field of vision is among the most important criteria for the design of these masks. Indeed, a field of vision that is too narrow leads to a tunnel vision effect for the wearer, which limits their ability to anticipate their actions because they cannot detect certain obstacles and / or other practitioners around them.

[0007] Furthermore, in the event of an incident, the wearer is hindered in reaching their safety and / or alerting equipment in time, as this equipment is most often worn on the wearer's clothing in the peripheral area of ​​their field of vision, which is obscured by the mask. The wearer must then move their head, which is not always possible, to position the equipment within their field of vision in order to activate it.

[0008] It is known to use a lens comprising two parts positioned one above the other. The first part has a constant radius of curvature along the horizontal and vertical axes, while the second part has a variable radius of curvature along the vertical axis. Such a lens makes it possible to widen the wearer's field of vision. It is narrower than other known masks, but it does not allow for wider viewing angles or upward movement. Furthermore, the quality of peripheral vision with such a lens is significantly degraded because the clarity of vision is impaired by the presence of blurry lines at the edges of the lens.

[0009] There is therefore a need for a mask that improves the width of the wearer's field of vision. Summary of the invention

[0010] The invention offers a solution to the problems mentioned above, by allowing an expansion of the field of vision by the use of a lens having a part over its entire periphery which has a reduced radius of curvature, possibly variable.

[0011] A first aspect of the invention relates to a lens comprising: • A first curved portion having a first constant radius of curvature along a first direction and a second constant radius of curvature along a second direction, the second direction being orthogonal to the first direction; • A second curved section on the periphery of the first curved section, the second curved section comprising: • A first part and a second part opposite each other along the first direction, the first part having a third radius of curvature along the first direction and the second part having a fourth radius of curvature along the first direction, the third and fourth radii of curvature being strictly smaller than the first radius of curvature; and • A third part and a fourth part opposite along the second direction, the third part having a fifth radius of curvature along the second direction and the fourth part having a sixth radius of curvature along the second direction, the fifth and sixth radii of curvature being strictly less than the second radius of curvature.

[0012] The terms "first direction" and "second direction" refer to two orthogonal axes which, at a point of intersection on the outer surface of the first portion of the lens, are tangent to that surface. The outer surface of the first portion of the lens is the convex surface of the first portion of the lens, that is, the surface of the first portion for which no line tangent to that surface intersects it.

[0013] The first direction corresponds, for example, to the direction of the largest dimension of the lens. The first direction is typically a direction horizontal when the lens rests vertically on the first part or the second part of its second portion. For example, the first direction is the horizontal direction in a user's field of vision when the lens is worn by said user.

[0014] The second direction then corresponds to the direction orthogonal to the direction of the largest dimension of the lens. The second direction is typically a vertical direction when the lens rests vertically on the first part or the second part of its second portion. For example, the second direction is the vertical direction in the user's field of vision when the lens is worn by said user.

[0015] The point of intersection of these two directions is located on the first portion, for example near the center of the first portion, for example near the centroid of the first portion, or even is this centroid. Alternatively, the point of intersection is near, or is, the highest point, that is to say the vertex, of the outer surface of the first portion when the lens rests on its second portion on a horizontal plane.

[0016] The term "near" means that a distance between the point of intersection and the nearest point of the point of intersection on the edge of the first portion is less than three-quarters of the distance between this nearest point and the center, isobarycenter or vertex of the first portion.

[0017] Thanks to the invention, the field of vision of the wearer of the glasses is widened. Indeed, the radius of curvature of the second portion, smaller than that of the first portion, makes it possible to open the field of vision beyond the first portion, including to the sides and above, in peripheral vision.

[0018] Furthermore, the convex shape on the periphery of the first portion allows for improvements to the structure of the lens holder and the glasses. Indeed, the second portion moves the first portion of the lens holder away from the wearer's face. Thus, it is possible to bring the lens holder closer to the face and / or make it thinner, without risking the distance between the eyes and the lens being too small, which could impair vision or cause discomfort to the wearer, particularly if they wear corrective glasses. In addition, bringing the lens holder closer to the wearer's face, as well as reducing its thickness, reduces its presence in the wearer's field of vision, which also allows for a wider field of vision.

[0019] In addition to the characteristics just mentioned, the lens according to the first aspect of the invention may have one or more complementary characteristics from among the following, considered individually or according to all technically possible combinations.

[0020] In one embodiment, the third and fourth radii of curvature are at least twice as small as the first radius of curvature, and / or the fifth and sixth radii of curvature are at least twice as small as the second radius of curvature.

[0021] In one embodiment, at least one of the third, fourth, fifth and sixth radii of curvature is variable along the first direction and / or along the second direction.

[0022] These embodiments, considered independently or concurrently, make it possible to reduce the surface area of ​​the second portion and, consequently, to increase the surface area of ​​the first portion. The clarity of the field of vision is thus improved.

[0023] Furthermore, the use of a variable radius of curvature for the second portion makes it possible to improve the adaptability of the lens to the shape of the lens support structure.

[0024] In one embodiment, at least one of the third, fourth, fifth and sixth radii of curvature is continuously variable along the first direction and / or along the second direction.

[0025] The use of a continuously variable radius of curvature for the second portion makes it possible to improve the clarity of the field of vision through this second portion.

[0026] In one embodiment, the first portion is adapted so that the field of vision through said first portion is at least 150° along the first direction and at least 70° along the second direction.

[0027] The clarity of the wearer's vision is thus ensured by the use of a lens having a large first portion.

[0028] A second aspect of the invention relates to a method for manufacturing a lens, the lens being, according to the first aspect, comprising: • Lens manufacturing by a single injection of the first portion and the second portion.

[0029] Injection molding reduces the environmental impact of lens manufacturing, particularly by significantly reducing the amount of waste generated. Specifically, injection molding eliminates the need to cut the lens to achieve the desired geometry.

[0030] A third aspect of the invention relates to an optical assembly comprising a lens according to the first aspect, in which the lens is assembled on a lens support by gluing or welding.

[0031] In one embodiment, the lens support comprises a plurality of fixing elements adapted to interchangeably assemble the lens support onto a frame.

[0032] The lens holder is thus removably mounted on the goggles, allowing the lens to be replaced or changed if it is damaged or if its use is unsuitable for the conditions in which the wearer practices the sport. For example, this allows the lens to be replaced when it is scratched, and / or a weather-resistant lens to be used instead of a specially tinted lens designed to protect the eyes from the sun in sunny weather.

[0033] In addition, such removability of the support makes it possible to use various lens technologies, including lenses comprising electronics, without having to change the mask.

[0034] In one embodiment, the fixing elements are complementary to the fixing elements on the frame.

[0035] In one embodiment, the plurality of fixing elements comprises at least four fixing elements distributed symmetrically with respect to a plane of symmetry of the lens support.

[0036] In one embodiment, the fastening elements are adapted to be fixed by snapping onto the mount.

[0037] In one embodiment, each fastening element of the plurality of fastening elements comprises: • A main body extending along a Z axis perpendicular to a rear portion of the lens support, the main body comprising a face inclined with respect to the Z axis; • A stop that extends perpendicularly to the Z axis from the inclined face.

[0038] The use of snap-on elements, such as lugs, allows for easy replacement of the lens while ensuring that the lens support does not detach unexpectedly when the mask is handled, in particular to remove it, or in the event of a fall of the wearer or the mask.

[0039] A fourth aspect of the invention relates to a ski mask comprising an optical assembly according to the third aspect.

[0040] The invention and its various applications will be better understood by reading the following description and examining the accompanying figures. BRIEF DESCRIPTION OF THE FIGURES

[0041] The figures are presented for illustrative purposes only and are in no way limiting of the invention. • Fig. 1 is a schematic representation of a lens according to one embodiment of the invention. • Fig. 2 is a schematic representation of the lens according to Fig. 1 from a different viewing angle. • Fig. 3 is a schematic representation of the lens according to Fig. 1 from a different viewing angle. • Fig. 4 is a schematic representation of the lens according to Fig. 1 from a different point of view. • Fig. 5 is a schematic representation of the lens according to Fig. 1 from a different viewing angle. • Fig. 6 is a schematic representation of an optical assembly according to one embodiment of the invention. • Figure 7 is a schematic representation of the assembly of a mount with an optical assembly, according to one embodiment of the invention. • Fig. 8 is a schematic representation of fixing elements of an optical assembly according to an embodiment of the invention. • Fig. 9 is a schematic representation of a fastening element according to an embodiment of the invention. • The [Fig. 10] is an exploded schematic representation of a mask according to one embodiment of the invention. • The [Fig. 11] is another schematic representation of the mask of the [Fig.1]. DETAILED DESCRIPTION

[0042] Unless otherwise specified, the same element appearing on different figures has a unique reference.

[0043] The invention described below relates to a lens whose geometric characteristics make it possible to widen the field of vision of the individual wearing the lens, called the "user", compared to existing lenses.

[0044] In the example given, the lens is intended for use on a goggle for sliding sports, such as skiing or surfing, but can alternatively be used for any application where a wide field of vision lens is preferred.

[0045] As illustrated by an example of an embodiment in Figures 1 to 5, the lens 10 comprises a first curved portion 11 and a second curved portion 12, hereafter simply referred to as the first portion 11 and the second portion 12, respectively. The first portion 11 and the second portion 12 are made of the same material, transparent to wavelengths in the visible range; for example, they comprise polycarbonate, or are made entirely of polycarbonate.

[0046] The second portion 12 is on the periphery of the first portion 11. That is to say, the second portion 12 is on the perimeter 11-1 of the first portion 11. As illustrated in Figures 1 to 5, the perimeter 11-1 corresponds to the contour of the first portion 11. In other words, the perimeter 11-1 corresponds to the border of the first portion 11.

[0047] The first portion 11 has a first constant radius of curvature along a first direction. The first portion 11 also has a second constant radius of curvature along a second direction.

[0048] The respective centers of the osculating circles corresponding to the first and second radii of curvature are located on the same side of the lens 10. The first and second radii of curvature are therefore such that the first portion 11 is convex (or concave, depending on the point of view).

[0049] The first and second radii of curvature may be equal or different. For example, the first radius of curvature may be larger than the second radius of curvature. Conversely, in some cases, the second radius of curvature may be larger than the first radius of curvature.

[0050] In the example given, the first radius of curvature is larger than the second radius of curvature. In particular, the first radius of curvature can be between 100 mm and 150 mm, for example between 115 mm and 135 mm, typically between 120 mm and 125 mm, or even equal to 123 mm, or even equal to 123.1 mm. Similarly, the second radius of curvature can be between 70 mm and 130 mm, for example between 85 mm and 115 mm, typically between 95 mm and 100 mm, or even equal to 97 mm, or even equal to 97.7 mm.

[0051] As stated previously, the first and second directions, denoted respectively DI and D2 in Figures 1 to 5, are two axes orthogonal at a point of intersection located on the outer surface 11-e, with reference to [Fig.5], of the first portion 11 of the lens 10. As illustrated in [Fig.5], the outer surface 11-e of the first portion 11 corresponds to the convex surface of the first portion 11. It is therefore the surface of the first portion 11 for which no line tangent to this outer surface 11-e intersects this outer surface 11-e. The first portion 11 also includes an internal surface 11-i, which corresponds to the concave surface of the first portion, that is to say, it corresponds to the surface of the first portion 11 for which any straight line tangent to this internal surface 11-i intersects this internal surface 11-i.

[0052] The first direction DI corresponds, for example, to the direction of the largest dimension of the lens 10, for example, to a horizontal direction of the lens 10 when it is held vertically, typically when the lens 10 is placed in front of the eyes of a user who is sitting or standing. By way of example, the first direction corresponds to the horizontal axis in the field of vision of this user, preferably to the horizontal axis in said field of vision that is tangent to the outer surface 11-e.

[0053] The second direction D2 therefore corresponds to the direction orthogonal to the direction of the largest dimension of the lens. Preferably, the second direction D2 is tangent to the outer surface 11-e. Thus, the second direction D2 is typically a vertical direction when the lens 10 is held vertically, typically when the lens 10 is placed in front of the eyes of a user, who is in a seated or standing position. By way of example, the second direction D2 is the vertical direction in the user's field of vision when the lens 10 is worn by said user.

[0054] The first direction DI and the second direction intersect at a point of intersection denoted C. The point C is on the first portion 11 of the lens 10. This point C is, for example, close to the center of the first portion, for example close to the isobarycenter of the first portion, or even is this isobarycenter.

[0055] In other words, point C may be close to, or may be, the highest point, that is to say the top, of the outer surface 11-e of the first portion 11 when the lens 10 rests on a horizontal plane, the inner face 11-i of the lens 10 being opposite this horizontal plane.

[0056] The second portion 12 comprises a first part 12-1, a second part 12-2, a third part 12-3 and a fourth part 12-4. The second portion is continuous, that is to say that the first 12-1, second 12-2, third 12-3 and fourth 12-4 parts of the second portion 12 are continuous with each other.

[0057] The first part 12-1 and the second part 12-2 are opposite along the first direction DI. That is to say, they are opposite each other, on either side of the first portion 11, along the first direction DI.

[0058] Similarly, the third part 12-3 and the fourth part 12-4 are opposite along the second direction D2. That is to say, they are opposite each other, on either side of the first portion 11, along the second direction D2.

[0059] The first part 12-1 corresponds, for example, to the part of the second portion 12 which is closest to the user's right eye when the lens 10 is worn, therefore corresponds to the right lateral part of the second portion 12.

[0060] The second part 12-2 corresponds, for example, to the part of the second portion 12 which is closest to the user's left eye when the lens 10 is worn, therefore corresponds to the left lateral part of the second portion 12.

[0061] The third part 12-3 corresponds, for example, to the part of the second portion 12 which is above the user's eyes when the lens 10 is worn, therefore corresponds to the upper part of the second portion 12.

[0062] The fourth part 12-4 corresponds, for example, to the part of the second portion 12 which is below the user's eyes when the lens 10 is worn, therefore corresponds to the lower part of the second portion 12.

[0063] The first portion 12-1 has a third radius of curvature along the first direction DL. The second portion 12-2 has a fourth radius of curvature, also along the first direction DL. The third and fourth radii of curvature are such that they are strictly smaller than the first radius of curvature, i.e., the radius of curvature of the first portion along the first direction DL.

[0064] The third portion 12-3 has a fifth radius of curvature along the second direction D2. The fourth portion 12-4 has a sixth radius of curvature, also along the second direction D2. The fifth and sixth radii of curvature are such that they are strictly less than the second radius of curvature, i.e., the radius of curvature of the first portion along the second direction D2.

[0065] The first portion 11 and the second portion 12 of the lens 10 are made of a transparent material, allowing the user wearing the lens 10 to perceive his environment through said lens 10.

[0066] The respective centers of the osculating circles corresponding to the third, fourth, fifth, and sixth radii of curvature are located on the same side of the lens 10 as the respective centers of the osculating circles corresponding to the first and second radii of curvature. The third, fourth, fifth, and sixth radii of curvature are therefore such that the lens 10 is convex or globally convex (or concave, depending on the point of view).

[0067] Such a second portion 12, at the periphery of the first portion 11, gives a "domed" shape to the lens, which makes it possible to move the first portion 11 away from the user's face and also to widen their field of vision, since the user can thus also perceive their environment through the second portion 12, both through the first and second parts 12-1 and 12-2 and through the third and fourth parts 12-3 and 12-4, and not only through the first portion 11. Advantageously, the second portion 12, at the periphery of the first portion 11, allows at a minimum the perception of the environment by the user through said second portion 12, when the lens 10 is worn by said user.

[0068] Thus, it is possible to geometrically adapt the second portion 12 to give it a desired shape, and therefore to give the lens 10 a desired shape, depending on its use. Typically, this makes it possible to adapt the geometry of the second portion 12 so that the lens 10 can be fixed to a lens holder without having to modify the geometry of the first portion 11.

[0069] In other words, the second portion 12 allows the lens 10 to be assembled with the lens support regardless of the geometry of the first portion 11.

[0070] In one embodiment, the second portion 11 is positioned around the user's eyes when the lens 10 is worn.

[0071] In one embodiment, the second portion 12 is such that it distances the periphery 11-1 of the first portion 11 from one of the user's pupils by at least 20 mm, for example, at least 25 mm, or even at least 29 mm, or even 29.5 mm. This distance between the pupil and the lens 10 is measured in a plane passing through said pupil, in particular through the center of said pupil, and orthogonal to the axis passing through both pupils, in particular through the respective centers of the pupils. In particular, this distance is measured in this plane between the lowest point of the lens 10, when it is worn by the user, and the projection of the center of the pupil at the same height as this lowest point of the lens 10 in said plane.

[0072] This distancing is made possible in particular by the presence of the second portion 12 whose convex shape, and its possible extension from this formed shape, make it possible to achieve the desired distancing.

[0073] In an embodiment compatible with the preceding embodiments, the third radius of curvature, the fourth radius of curvature, the fifth radius of curvature and / or the sixth radius of curvature are greater than or equal to 1 mm, for example greater than or equal to 2 mm, or even greater than or equal to 3 mm.

[0074] In one embodiment, the lens includes a recess 13, also called a "nose bridge", as illustrated in Figures 1 to 5, 7 and 8, forming a concave indentation in the lens 10 in order to match the shape of the lens 10 to the shape of the nose of the user wearing the lens 10. In particular, the recess 13 is a recess in the first portion 11 of the lens 10.

[0075] In this embodiment, the sixth radius of curvature is variable along the first direction Dl, at least, and reaches a minimum value near the apex S of the nose bridge 13. At the apex S, shown in figures 1 to 5, the sixth radius of curvature is, for example, less than or equal to 10 mm, for example less than or equal to 5 mm, or even typically equal to 3 mm.

[0076] In particular, this value is reached by the sixth radius of curvature in the plane of symmetry of the lens 10, that is to say the vertical plane the edge of the user's nose when the lens 10 is worn by the user.

[0077] The apex S of the nose bridge corresponds to the point on the border 11-1 of the first portion 11 which is closest to the root of the nose.

[0078] By "in the vicinity" of vertex S is understood to be in the area of ​​the fourth part 12-4 which is located below vertex S and which is also located in the plane of symmetry of lens 10.

[0079] In one embodiment, the third, fourth and fifth radii of curvature are strictly greater than the minimum value of the sixth radius of curvature.

[0080] In an embodiment compatible with the preceding embodiments, the third radius of curvature is variable along the second direction D2, at least, and reaches a minimum value near the lower right corner D of the first portion 11. At the lower right corner D, shown in Figures 1 to 5, the third radius of curvature is, for example, less than or equal to 30 mm, for example less than or equal to 25 mm, or even typically equal to 21 mm.

[0081] In particular, this value is reached by the third radius of curvature in the plane passing through the lower right corner D and parallel to the plane passing through the two pupils of the user which is orthogonal to the plane of symmetry of the lens (i.e., the plane following the edge of the user's nose when the lens 10 is worn by the user).

[0082] The lower right corner D corresponds to the point on the border 11-1 of the first portion 11 which is furthest from the root of the user's nose, while being positioned below the root of said nose, to the right of said nose, when the lens 10 is worn by the user.

[0083] By "near" the lower right corner D is meant in the area of ​​the first part 12-1 which is next to the lower right corner D and which is also in the plane passing through the lower right corner D and parallel to the plane passing through the two pupils of the user which is orthogonal to the plane of symmetry of the lens.

[0084] In an embodiment compatible with the preceding embodiments, the fourth radius of curvature is variable along the second direction D2 and reaches a minimum value at the lower left corner G of the first portion 11. At the lower left corner G, shown in Figures 2, 3 and 5, the third radius of curvature is, for example, less than or equal to 30 mm, for example less than or equal to 25 mm, or even typically equal to 21 mm.

[0085] In particular, this value is reached by the fourth radius of curvature in the plane passing through the lower left corner G and parallel to the plane passing through the two pupils of the user which is orthogonal to the plane of symmetry of the lens (i.e., the plane following the edge of the user's nose when the lens 10 is worn by the user).

[0086] The lower left corner G corresponds to the point on the border 11-1 of the first portion 11 which is furthest from the root of the user's nose, while being positioned below the root of said nose, to the left of said nose, when the lens 10 is worn by the user.

[0087] By "near" the lower left corner G is meant in the area of ​​the first part 12-1 which is next to the lower left corner G and which is also in the plane passing through the lower left corner G and parallel to the plane passing through the two pupils of the user which is orthogonal to the plane of symmetry of the lens.

[0088] In one embodiment, the third radius of curvature is equal to the fourth radius of curvature.

[0089] In one embodiment, the optical magnification of the first portion 11 is between 0.9 and 1.1, or even between 0.95 and 1.05; for example, it is equal to 0.975, 1, or 1.025. The optical magnification of the first portion is measured by a standardized control known per se. Typically, this is a control based on a measurement of the distortion of a light beam through the first portion 11 or based on a measurement of a transmission coefficient of a light beam through the first portion 11.

[0090] In an embodiment compatible with the preceding embodiment, the third radius of curvature is at least twice as small as the first radius of curvature. In this embodiment, the fourth radius of curvature is also at least twice as small as the first radius of curvature.

[0091] In an embodiment compatible with the preceding embodiments, the fifth radius of curvature is at least twice as small as the second radius of curvature. In this embodiment, the sixth radius of curvature is also at least twice as small as the second radius of curvature.

[0092] In one embodiment, the third, fourth, fifth and sixth radii of curvature are strictly smaller than the first and second radii of curvature, for example at least twice as small as the first and second radii of curvature.

[0093] In an embodiment compatible with the preceding embodiments, the first second portion 12 may be such that: • The third radius of curvature is variable according to the first direction DI and / or according to the second direction D2; • The fourth radius of curvature is variable according to the first direction DI and / or according to the second direction D2; • The fifth radius of curvature varies according to the first direction DI and / or according to the second direction D2; and / or • The sixth radius of curvature is variable according to the first direction DI and / or according to the second direction D2.

[0094] In other words, in this embodiment, at least one of the third, fourth, fifth and sixth radii of curvature is variable along the first direction DI and / or along the second direction D2. These radii of curvature may therefore not be constant along either of the first and second directions, as long as they comply with the criteria previously established for these radii of curvature with respect to the first and second radii of curvature.

[0095] In an embodiment compatible with the preceding embodiments, the first second portion 12 may be such that: • The third radius of curvature is continuously variable along the first direction DI and / or along the second direction D2; • The fourth radius of curvature is continuously variable along the first direction DI and / or along the second direction D2; • The fifth radius of curvature is continuously variable along the first direction DI and / or along the second direction D2; and / or • The sixth radius of curvature is continuously variable along the first direction DI and / or along the second direction D2.

[0096] In other words, in this embodiment, at least one of the third, fourth, fifth and sixth radii of curvature is continuously variable along the first direction DI and / or along the second direction D2. The continuous variation makes it possible to reduce the distortion of the field of vision in the second portion 12 compared to non-continuous variations of the radius(s) of curvature concerned.

[0097] Such a radius of curvature makes it possible to guarantee the clarity of vision, including in the peripheral portion of the lens, while improving the strength by allowing a better distribution of stresses throughout the material of the lens, particularly in the second portion.

[0098] In an embodiment compatible with previous embodiments, the field of vision of the user wearing the lens 10 is at least 150° along the first direction DI and at least 70° along the second direction D2 through the first portion 11.

[0099] For example, this field of vision is at least 155°, or even at least 160°, for example equal to 164°, or even equal to 164.6° according to the first direction DI.

[0100] For example, this field of vision is at least 80° along the second direction D2, or at least 85°, or even at least 90°, for example it may be at least 40°, typically equal to 40.9° through the top of the first portion 11 and at least 45°, or at least 48°, typically equal to 48.9° through the bottom of the first portion 11.

[0101] The top of the first portion 11 here corresponds to the part of the first portion that lies above the central horizontal plane of the user's field of vision. Similarly, the bottom of the first portion 11 here corresponds to the part of the first portion that lies below the central horizontal plane of the user's field of vision. The central horizontal plane is the plane of the user's field of vision that lies in line with their gaze when the user is looking straight ahead at a point at eye level, i.e., without having to look up or down.

[0102] In this embodiment, the first portion therefore links predefined characteristics to guarantee a minimum field of vision for the user. The second portion 12 expands this field of vision by allowing peripheral vision, or at least peripheral perception, of the environment by the user.

[0103] In an embodiment compatible with previous embodiments, the first portion 11 of lens 10 is class 1, in accordance with standard EN 166.

[0104] In an embodiment compatible with previous embodiments, the second portion 12 of the lens is of any class, in accordance with standard EN 166.

[0105] In an embodiment compatible with the preceding embodiments, the second portion is such that the user's field of vision through the entire lens, therefore including through the second portion 12, is at least 100° along the second direction D2, or even at least 105°, for example equal to 109°, and is at least 170°, or even at least 175°, or even at least 180°, for example equal to 184°.

[0106] In an embodiment compatible with the preceding embodiments, the first portion connects a toric or spherical shape (typically because the first and second radii of curvature are finite in value) or cylindrical shape (typically because the first or second radius of curvature is infinite in value).

[0107] In one embodiment, compatible with the previous embodiments, the lens 10 is manufactured in a single injection of the first portion 11 and the second portion 12.

[0108] The invention also relates to a method for manufacturing the lens 10, as described above. This method comprises a step of manufacturing the first portion 11 and the second portion 12 of the lens 10 by a single injection.

[0109] As illustrated in [Fig. 6] (a), the invention also relates to a lens support 20, adapted to cooperate with the lens 10, described above. The lens 10 is thus assembled onto the lens support.

[0110] In particular, the lens holder 20 comprises a front portion 20-1 and a rear portion 20-2. The front portion 20-1 is convex and adapted to receive the lens 10 in order to assemble the lens 10 with the lens holder 20. The rear portion 20-2 is concave and adapted to face the user's face when the lens holder 20 is worn by said user. In other words, the lens 10 is positioned on the opposite side of the lens holder 20 from the user's perspective.

[0111] The lens 10 is assembled with the lens support 20 by assembling the second portion 12 onto the lens support 20, specifically on the front part 20-1. In particular, the assembly is carried out by assembling the free edge 12-a of the second portion 12, that is to say its perimeter, in other words its outline or its border, with the front part 20-1.

[0112] The lens 10 is, for example, assembled by gluing, for example with glue or joint, or by welding, typically via ultrasonic or laser welding, or by any other assembly technique compatible with the lens 10 and the lens support 20, in particular with their respective materials.

[0113] Advantageously, the assembly can be carried out using a process with a low environmental impact. Also advantageously, the lens 10 and / or the lens support 20 can comprise or be made of polycarbonate, thus enabling their recyclability and reducing their environmental impact.

[0114] The assembly of the lens 10 with the lens support 20 is called optical assembly 30, as illustrated in [Fig.6] (b).

[0115] As illustrated by this embodiment, the second portion 12 also serves to adapt the geometry of the lens 10 so that it can be assembled on the lens support 20, independently of the shape of the lens super 20. Furthermore, the convex shape of the lens 10 makes it possible to free the lens 10 from the lens support 20 and thus to enlarge the field of vision of the user wearing the optical assembly 30.

[0116] The presence of the second portion 12 therefore allows great adaptability and flexibility for fixing the lens 10 on the lens support 20, while ensuring optimal optical quality for the first portion 11 and increasing the user's field of vision.

[0117] In one embodiment, the first portion connects a surface smaller than the recess of the lens support 20, which is intended to encircle the eyes when the mask is worn and allow the user wearing the lens support 20 to look through said lens 10.

[0118] In other words, in this embodiment, the first portion 11 cannot be assembled directly onto the lens support 20, because the first portion binds a surface too small to completely fill the recess of the lens support 20. The assembly is then only possible by the presence of the second portion 12, this second portion 12 allowing the lens 10 to completely fill the recess of the lens support 20.

[0119] In one embodiment, the second portion 12 is such that it distances the periphery 11-1 of the first portion 11 from the lens support 20 by at least 10 mm, for example at least 15 mm, for example at least 16 mm, or even 16.3 mm. This distance between the lens support 20 and the lens 10 is measured in a plane passing through one of the user's pupils, in particular passing through the center of said pupil, and orthogonal to the axis passing through both pupils, in particular passing through the respective centers of the pupils. In particular, this distance is measured in this plane between the lowest point of the lens 10, when it is worn by the user, and the projection of the point of the lens support 20 which is at the same height as this lowest point of the lens 10 in said plane.

[0120] This distancing is made possible in particular by the presence of the second portion 12 whose convex shape, and its possible extension from this formed shape, make it possible to achieve the desired distancing.

[0121] In one embodiment, compatible with the preceding embodiments, the lens holder 20 comprises a plurality of fastening elements. These fastening elements serve to assemble the optical assembly 30, and thus the lens holder 20, interchangeably onto a mount 40, illustrated in [Fig. 7]. The fastening elements are, for example, positioned on the rear part 20-2 of the lens holder 20.

[0122] In one embodiment, the fastening elements are such that they are complementary to fastening elements on the mount 40, referred to as complementary fastening elements. In particular, each fastening element of the lens holder 20 is complementary to one of the complementary fastening elements, and vice versa.

[0123] In one embodiment, the plurality of lens support fixing elements 20 comprises at least four fixing elements. These four fixing elements are, for example, distributed symmetrically with respect to a plane of symmetry of the lens support 20. The plane of symmetry of the lens support 20 corresponds to the plane orthogonal to the first portion 11 along the axis of the user's nasal bridge when the optical assembly 30 is worn.

[0124] By way of example, the attachment elements to an upper left edge, an upper right edge, a lower left edge and a lower right edge of the lens holder 20. For example, the upper left edge is on the rear part 20-2 above and to the left of the user's left eye when the lens holder is worn; the upper right edge is on the rear part 20-2 above and to the right of the user's right eye when the lens holder is worn; the lower left edge is on the rear part 20-2 below and to the left of the user's left eye when the lens holder is worn; the lower right edge is on the rear part 20-2 below and to the right of the user's right eye when the lens holder is worn.

[0125] Advantageously, the fastening elements can be manufactured by injection, and thus reduce the environmental impact of their manufacture, typically by reducing the number of mold components to be removed to release said fastening elements.

[0126] The fixing elements may be, in whole or in part, snap-on, magnetic, snap-fit ​​or any other type of fixing mechanism allowing the optical assembly 30 to be removably assembled on the mount 40. Advantageously, this type of fixing allows the optical assembly 30 to be replaced, for example to change the type of lens 10, without risking damage to the lens holder 20, the lens 10 and / or the mount 40.

[0127] In one embodiment, compatible with the preceding embodiments, the lens holder mounting elements 20 are, as illustrated in [Fig. 8], snap-on mounting elements. That is to say, the mounting elements are adapted to be snap-on onto the mount 40. In other words, the mounting elements are adapted to snap-on onto the complementary mounting elements.

[0128] In particular, as shown in [Fig.8], the plurality of fixing elements may include a fixing element at the upper left edge EH, at the upper right edge E2, at the lower left edge Hi and at the lower right edge H2 of the lens support 20.

[0129] The plurality of fixing elements may also include a fixing element between the upper left edge Ei and the upper right edge E2, typically at a location F corresponding to the middle of the portion of the lens support 20 located between the upper left edge Ei and the upper right edge E2, i.e. on the plane of symmetry of the lens support 20.

[0130] The plurality of fixing elements may also include a fixing element between the upper left edge Ei and the location F, typically at a location Ji corresponding to the middle of the portion of the lens support 20 located between the upper left edge Ei and the location F, or to one-third of the distance between the location F and the upper left edge Ei from the location F.

[0131] The plurality of fixing elements may also include a fixing element between the upper right edge E2 and the location F, typically at a location J2 corresponding to the middle of the portion of the lens support 20 located between the upper right edge E2 and the location F, or to one-third of the distance between the location F and the upper right edge E2 from the location F.

[0132] The plurality of fixing elements may also include a fixing element between the lower left edge Hi and the lower right edge H2, typically at a location G corresponding to the middle of the portion of the lens support 20 located between the lower left edge Hi and the lower right edge H2, that is to say on the plane of symmetry of the lens support 20.

[0133] The plurality of fixing elements may also include a fixing element between the lower left edge Hi and the location G, typically at a location Ki corresponding to the middle of the portion of the lens support 20 located between the lower left edge Hi and the location G, or to one-third of the distance between the location G and the lower left edge Hi from the location G.

[0134] The plurality of fixing elements may also include a fixing element between the lower right edge H2 and the location G, typically at a location K2 corresponding to the middle of the portion of the lens support 20 located between the lower right edge H2 and the location G, or to one-third of the distance between the location G and the lower right edge H2 from the location G.

[0135] Alternatively, the lens 10 may include a recess 13, also called a "nose bridge," as illustrated in Figures 1 to 5, 7, and 8, forming a concave indentation in the lens 10 to match the shape of the lens 10 to the shape of the nose of the user wearing the lens. In particular, the recess 13 is a recess in the first portion of the lens 10. Similarly, the lens holder 20 may also include a recess 22, also adapted to form a concave indentation so as to match the shape of the lens holder 20 to the shape of the nose of the user wearing the lens holder 20. The second portion 12 is thus adapted to assemble the lens 10 onto the lens holder 20 so as to match the recess 13 of the lens with the recess 22 of the lens holder 20.

[0136] In this alternative, the locations Ki and K2 correspond, as illustrated in [Fig.8], to the two locations, on either side of the recess 22, from which the withdrawal 22 of the lens support 20 is initiated.

[0137] In [Fig. 8], location K corresponds to location Ki and / or location K2, in particular in the detailed view of location K. Similarly, location J corresponds to location Ji and / or location J2, in particular in the detailed view of location J. Also, location E corresponds to location Ei and / or location E2, in particular in the detailed view of location E. Furthermore, location H corresponds to location Hi and / or location H2, in particular in the detailed view of location H.

[0138] In one embodiment, compatible with the preceding embodiments, each fastening element 21 of the plurality of fastening elements comprises a snap-on fastening element, as shown in [Fig. 9], and includes a main body 21-1 and a stop 21-3. The main body 21-1 extends along an axis Z, which is perpendicular to the inner part 20-2 of the lens support 20. The main body includes, in particular, a face 21-2 inclined with respect to this axis Z.

[0139] The stop 21-3 extends perpendicularly to the Z axis, from the inclined face 21-2 of the relevant fixing element 21.

[0140] The dimensions of the main body 21-1, the inclined plane 21-2 and the stop 21-3 depend on the use made of the optical assembly 30. The geometry and dimensions of each fixing element 21 may, moreover, be different for each of the fixing elements 21 of the plurality of fixing elements.

[0141] The complementary element 32 is represented by the dashed-line shape in [Fig.9].

[0142] The advantage of using a snap-fit ​​fixing to assemble the optical assembly 30 onto the mount 40 is that it allows for an assembly that is more resistant to tension, and therefore reduces the risk of unintentional disassembly of the optical assembly 30 from the mount 40, when the assembly formed by the mount 40 and the optical assembly 30 is handled and / or falls.

[0143] In particular, the snap-on fastening elements are dimensioned, for example as shown in [Fig.8], to withstand at least a tensile force of 50 N, typically 70 N. This ensures that the optical assembly 30 is not disassembled from the mount 40 when handling the mask, or in the event of the mask being dropped.

[0144] Another aspect of the invention relates to a method for assembling the lens 10, described above, with the lens support 20, also described above. This method includes a step of bonding the lens 10 to the lens support 20 or a welding step, for example by ultrasonic or laser welding, of the lens 10 to the lens support 20. In particular, this bonding or welding step involves bonding or welding, respectively, the second portion 12 to the front part 20-1, specifically by bonding or welding, respectively, the free edge 12-a of the second portion 12 to the front part 20-1.

[0145] Another aspect of the invention relates to a ski mask 50, as illustrated in Figures 10 and 11, comprising the optical assembly 30, i.e. comprising the lens 10 and the lens support 20.

[0146] As illustrated in figures 9 and 10, the mask 50 may also include an inner screen 31, the frame 40, the latter including a frame support 41, a ventilation foam 42, a comfort foam 43 and a strap 44.

[0147] The inner screen 31 is, for example, assembled on the optical assembly 30, for example on the lens support 20, for example by gluing or welding, just like the lens 10, but on the rear part 20-2 of the lens support 20. The inner screen 31 is adapted in a known way to reduce or even prevent the formation of fog on the lens.

[0148] The mount support 41 comprises a front face and a rear face. The front face is preferably convex. The additional fixing elements are preferably arranged on the front face, opposite the fixing elements of the lens support 20. The rear face is preferably concave.

[0149] The ventilation foam 42 is, for example, assembled on the rear face of the frame support 4L. The comfort foam is, for example, assembled on the ventilation foam 42 so as, on the one hand, to be in contact with the face of the user when the mask 50 is worn by said user and, on the other hand, to prevent the face of the user from coming into contact with the other components of the mask 50 when it is worn by said user.

[0150] The strap 43 is assembled with the frame support 41, so as to maintain a predefined pressure on the back of the user's skull or on the back of a helmet worn by the user, when the mask is worn, and to maintain the same predefined pressure on the comfort foam 43 against the user's face, in order to keep the mask in place and prevent it from falling off.

Claims

Demands

1. Lens (10) comprising: - A first curved portion (11) having a first constant radius of curvature along a first direction (D1) and a second constant radius of curvature along a second direction (D2), the second direction (D2) being orthogonal to the first direction (D1); - A second curved portion (12) on the periphery of the first curved portion (11), the second curved portion (12) comprising: • A first part (12-1) and a second part (12-2) opposite along the first direction (D1), the first part (12-1) having a third radius of curvature along the first direction (D1) and the second part (12-2) having a fourth radius of curvature along the first direction (D1), the third and fourth radii of curvature being strictly less than the first radius of curvature;and • A third part (12-3) and a fourth part (12-4) opposite along the second direction, the third part having a fifth radius of curvature along the second direction (D2) and the fourth part having a sixth radius of curvature along the second direction (D2), the fifth and sixth radii of curvature being strictly less than the second radius of curvature.;

2. Lens (10) according to claim 1, wherein the third and fourth radii of curvature are at least twice as small as the first radius of curvature, and / or the fifth and sixth radii of curvature are at least twice as small as the second radius of curvature.

3. Lens (10) according to any one of the preceding claims, wherein at least one of the third, fourth, fifth and sixth radii of curvature is variable along the first direction (D1) and / or along the second direction (D2).

4. Lens (10) according to any one of the preceding claims, wherein at least one of the third, fourth, fifth and sixth radii of curvature is continuously variable along the first direction (D1) and / or along the second direction (D2).

5. Lens (10) according to any one of the preceding claims, wherein the first portion (11) is adapted so that the field of vision through said first portion (11) is at least 150° along the first direction (D1) and at least 70° along the second direction (D2).

6. Method of manufacturing a lens (10), the lens (10) being according to any one of the preceding claims, comprising: - Manufacturing the lens (10) by a single injection of the first portion (11) and the second portion (12).

7. Optical assembly (30) comprising a lens (10) according to any one of claims 1 to 6, wherein the lens (10) is assembled onto a lens support (20) by gluing or welding.

8. Optical assembly (30) according to claim 7, wherein the lens support (20) comprises a plurality of fixing elements (21) adapted to interchangeably assemble the lens support (20) onto a mount (40).

9. Optical assembly (30) according to claim 8, wherein the fixing elements (21) are complementary to fixing elements (32) on the mount (40).

10. Optical assembly (30) according to any one of claims 8 to 9, wherein the plurality of fixing elements (21) comprises at least four fixing elements distributed symmetrically with respect to a plane of symmetry of the lens support (20).

11. Optical assembly (30) according to any one of claims 8 to 10, wherein the fixing elements (21) are adapted to be fixed by snapping onto the mount (40).

12. Optical assembly (30) according to any one of claims 8 to 11, wherein each fixing element (21) of the plurality of fixing elements (21) comprises: - A main body (21-1) which extends along a Z axis perpendicular to a rear part (20-2) of the lens support (20), the main body (21-1) comprising a face inclined (21-2) with respect to the Z axis;

13. - A stop (21-3) which extends perpendicularly to the Z axis from the inclined face (21-2). ski mask (50) comprising an optical assembly (30) according to any one of claims 7 to 12.

Images