Lens with improved peripheral visual perception, in particular for ski goggles

Abstract

One aspect of the invention relates to a lens (10) comprising a first portion (11) having a constant radius of curvature in a first and a second direction (D1, D2), and a second portion (12) at the periphery of the first portion, having a smaller radius of curvature that may be variable in the first and second directions.

Description

DESCRIPTION TITLE: Glasses with enhanced peripheral vision, especially for ski goggles TECHNICAL FIELD OF THE INVENTION

[0001] The technical field of the invention is that of vision equipment, particularly for sporting activities, 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, providing high optical quality within the wearer's direct field of vision—that is, 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 designed to allow the wearer to perceive their surroundings 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 lens geometry, which is not designed to see in these peripheral areas, or by both.

[0006] Expanding 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 users around them.

[0007] Furthermore, in the event of an incident, the wearer is hindered in reaching their safety and / or alert equipment in time, as this equipment is most often carried 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 consisting of 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 allows the wearer's field of vision to widen downwards compared to known masks, but does not allow it to be widened laterally or upwards. Furthermore, the quality of peripheral vision with such a lens is significantly degraded because the clarity of vision is impaired by the presence of blurred lines at the edges of the lens.

[0009] Therefore, there is 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 a widening of the field of vision by the use of a lens having a part on 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 less 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 this surface intersects it.

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

[0014] The second direction then corresponds to the direction orthogonal to the longest dimension of the lens. This second direction is typically vertical when the lens rests vertically on the first or second portion of its second segment. For example, the second direction is the vertical direction in the user's field of vision when the lens is worn by that 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, 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 the distance between the point of intersection and the nearest point to 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 wearer's field of vision is widened. Indeed, the radius of curvature of the second portion, smaller than that of the first portion, allows the field of vision to be opened beyond the first portion, including to the sides and above, in peripheral vision.

[0018] Furthermore, the curved shape around the periphery of the first portion allows for improvements to the structure of the lens holder and the frame. Indeed, the second portion moves the first portion of the lens holder away from the wearer's face. This makes it 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, especially for those wearing corrective lenses. Moreover, bringing the lens holder closer to the wearer's face, as well as reducing its thickness, minimizes its presence in the wearer's field of vision, thus also widening their field of view.

[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, allow for a reduction in the surface area of ​​the second portion and, consequently, an increase in 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 improves 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] Using a continuously variable radius of curvature for the second portion improves 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 with 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: The lens is manufactured by a single injection of the first portion and the second portion.

[0029] Injection molding reduces the environmental impact of lens manufacturing, notably by significantly decreasing the amount of waste generated. In particular, 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 includes a plurality of fixing elements adapted to interchangeably assemble the lens support onto a frame.

[0032] The lens holder is thus removablely mounted on the goggles, allowing for lens replacement or replacement if it is damaged or unsuitable for the conditions in which the wearer is practicing the sport. For example, this allows for lens replacement when it is scratched, and / or for switching from a specially tinted lens designed to protect the eyes from the sun to a weather-resistant lens in bright sunlight.

[0033] In addition, such removable support allows the use of various lens technologies, including lenses incorporating electronics, without having to change masks.

[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 attached by snapping them onto the frame.

[0037] In one embodiment, each fastener of the plurality of fasteners 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 tabs, allows for easy lens replacement while ensuring that the lens support does not detach unexpectedly when the mask is handled, particularly for removal, 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 to the invention. Figure 1 is a schematic representation of a lens according to one embodiment of the invention. Figure 2 is a schematic representation of the lens according to Figure 1 from a different viewing angle. Figure 3 is a schematic representation of the lens according to Figure 1 from a different viewing angle. Figure 4 is a schematic representation of the lens according to Figure 1 from a different viewing angle. Figure 5 is a schematic representation of the lens according to Figure 1 from a different viewing angle. Figure 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. Figure 8 is a schematic representation of fixing elements of an optical assembly according to an embodiment of the invention. Figure 9 is a schematic representation of a fastening element according to one embodiment of the invention. Figure 10 is an exploded schematic representation of a mask according to one embodiment of the invention. Figure 11 is another schematic representation of the mask in Figure 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 provided, 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 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 first portion 11 and 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 can be equal or different. For example, the first radius of curvature can be larger than the second radius of curvature. Conversely, in some cases, the second radius of curvature can be larger than the first radius of curvature.

[0050] In the example provided, the first radius of curvature is larger than the second radius of curvature. Specifically, 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 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 97.7 mm.

[0051] As stated previously, the first and second directions, labeled D1 and D2 respectively in figures 1 to 5, are two orthogonal axes in an intersection point located on the outer surface 11-e, with reference to Figure 5, of the first portion 11 of the lens 10. As illustrated in Figure 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 inner surface 11-i, which corresponds to the concave surface of the first portion; that is, it corresponds to the surface of the first portion 11 for which any line tangent to this inner surface 11-i intersects this inner surface 11-i.

[0052] The first direction D1 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 longest 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 sitting or standing. As an 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 D1 and the second direction intersect at a point of intersection noted C. The point C is on the first portion 1 1 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 1 1 when the lens 10 rests on a horizontal plane, the inner face 1 1 -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 D1. That is to say, they are opposite each other, on either side of the first portion 11, along the first direction D1.

[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 section 12-1 has a third radius of curvature along the first direction D1. The second section 12-2 has a fourth radius of curvature, also along the first direction D1. 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 D1.

[0064] The third section 12-3 has a fifth radius of curvature along the second direction D2. The fourth section 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 section 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, enabling the user wearing the lens 10 to perceive their 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 lens 10 as the respective centers of the osculating circles corresponding to the first and second radii of curvature. Therefore, the third, fourth, fifth, and sixth radii of curvature are such that lens 10 is convex or globally convex (or concave, depending on the perspective).

[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 a desired shape to the lens 10, depending on its use. Typically, this allows the geometry of the second portion 12 to be adapted 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 the two 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 This is carried by the user, and the projection from the center of the pupil to 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 D1, 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 lens 10, that is to say the vertical plane of the edge of the user's nose when lens 10 is worn by the user.

[0077] The apex S of the nasal 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 below vertex S and which is also 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 one 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 lens 10 is worn by the user).

[0082] The lower right corner D corresponds to the point on the border 1 1 -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 one embodiment, compatible with the previous 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 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 that is furthest from the root of the user's nose, while being positioned under the root of said nose, to the left of said nose, when 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 one embodiment compatible with previous 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 can be such that: The third radius of curvature is variable according to the first direction D1 and / or according to the second direction D2; The fourth radius of curvature is variable according to the first direction D1 and / or according to the second direction D2; The fifth radius of curvature varies according to the first direction D1 and / or according to the second direction D2; and / or The sixth radius of curvature is variable according to the first direction D1 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 D1 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 respect 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 can be such that: The third radius of curvature is continuously variable along the first direction D1 and / or along the second direction D2; The fourth radius of curvature is continuously variable along the first direction D1 and / or along the second direction D2; The fifth radius of curvature is continuously variable along the first direction D1 and / or along the second direction D2; and / or The sixth radius of curvature is continuously variable along the first direction D1 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 D1 and / or along the second direction D2. This continuous variation reduces the distortion of the field of view in the second direction. portion 12 with respect to non-continuous variations of the radius(s) of curvature concerned.

[0097] Such a radius of curvature ensures clarity of vision, including in the peripheral portion of the lens, while improving strength by allowing better distribution of stress throughout the lens material, particularly in the second portion.

[0098] In one embodiment, compatible with previous embodiments, the field of vision of the user wearing the lens 10 is at least 150° along the first direction D1 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 D1.

[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 corresponds here 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 corresponds here 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 in 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, without having to look up or down.

[0102] In this embodiment, the first portion 11 therefore has 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 one 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, 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 one embodiment, compatible with the previous embodiments, the first portion 11 has a toric or spherical shape (typically because the first and second radii of curvature are finite in value) or a cylindrical shape (typically because the first or second radius of curvature is infinite in value).

[0107] In one embodiment, compatible with 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 Figure 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 part 20-1 and a rear part 20-2. The front part 20-1 is convex and designed to receive the lens 10, thus assembling the lens 10 with the lens holder 20. The rear part 20-2 is concave and designed to face the user's face when the lens holder 20 is worn. 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 periphery, in other words its contour or 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 low-environmental-impact process. 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 figure 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 allows the lens 10 to be freed 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 to fix 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 11 has a smaller surface area 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 11 has too small a surface to completely fill the recess in the lens support 20. Assembly is then only possible through the presence of the second portion 12, this second portion 12 allowing the lens 10 to completely fill the recess in 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 their respective centers. Specifically, this distance is measured in this plane between the lowest point of the lens 10, when worn by the user, and the projection of the point on the lens support 20 that 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 Figure 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 support of lens 20 is complementary to one of the complementary fixing 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] For 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 back 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 back 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 back 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 back part 20-2 below and to the right of the user's right eye when the lens holder is worn.

[0125] Advantageously, the fasteners can be manufactured by injection, thereby reducing the environmental impact of their manufacture, typically by reducing the number of mold components to be removed to release said fasteners.

[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 onto 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 Figure 8, snap-on mounting elements. That is to say, the mounting elements are adapted to be snap-on onto the mount 40. In other In terms of fasteners, the fasteners are designed to snap together with the complementary fasteners.

[0128] In particular, as shown in Figure 8, the plurality of fixing elements may include a fixing element at the upper left edge Ei, at the upper right edge E2, at the lower left edge H1 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 E1 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 E1 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 E1 and the location F, typically at a location J1 corresponding to the middle of the portion of the lens support 20 located between the upper left edge E1 and the location F, or to one-third of the distance between the location F and the upper left edge E1 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 H1 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 H1 and the lower right edge H2, i.e. 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 H1 and the location G, typically at a location K1 corresponding to the middle of the portion of the lens support 20 located between the lower left edge H1 and the location G, or to one-third of the distance between the location G and the lower left edge H1 from the location G.

[0134] The plurality of fixing elements may also include a fixing element between the lower right edge H2 and 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 replacement G, or one-third of the distance between location G and the lower right edge H2 from 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 K1 and K2 correspond, as illustrated in Figure 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 Figure 8, location K corresponds to location K1 and / or location K2, particularly in the detailed view of location K. Similarly, location J corresponds to location J1 and / or location J2, particularly in the detailed view of location J. Also, location E corresponds to location E1 and / or location E2, particularly in the detailed view of location E. Furthermore, location H corresponds to location H1 and / or location H2, particularly 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 Figure 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 intended use of the optical assembly 30. The geometry and the 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 Figure 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 fixing elements are dimensioned, for example as shown in Figure 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 onto the optical assembly 30, for example onto the lens support 20, for example by gluing or welding, all like lens 10, but on the rear part 20-2 of lens support 20. The inner screen 31 is adapted in a way known to reduce or even prevent fogging 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 41. The comfort foam is, for example, assembled on the ventilation foam 42 so as, on the one hand, to be in contact with the user's face when the mask 50 is worn by said user and, on the other hand, to prevent the user's face 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. A sliding sports mask (50) comprising a lens (10), the lens comprising: - A first portion (1 1 ) curved 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: o 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 o 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;characterized in that 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).;

2. Sliding sports mask (50) 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. Sliding sports mask (50) 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. Sliding sports mask (50) 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).

5. Sliding sports mask (50) according to any one of the preceding claims, further comprising an optical assembly (30) including the lens (10), in which the lens (10) is assembled onto a lens support (20) by gluing or welding.

6. Sliding sports mask (50) according to claim 5, wherein the lens support (20) comprises a plurality of fastening elements (21) adapted to interchangeably assemble the lens support (20) onto a frame (40).

7. Skiing sports mask (50) according to claim 6, wherein the fastening elements (21) are complementary to fastening elements (32) on the frame (40).

8. Sliding sports mask (50) according to any one of claims 6 to 7, wherein the plurality of fastening elements (21) comprises at least four fastening elements distributed symmetrically with respect to a plane of symmetry of the lens support (20).

9. Skiing sports mask (50) according to any one of claims 6 to 8, wherein the fastening elements (21) are adapted to be fixed by snapping onto the frame (40).

10. Skiing / snowboarding mask (50) according to any one of claims 6 to 9, wherein each fastening element (21) of the plurality of fastening 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; - A stop (21 -3) which extends perpendicularly to the Z axis from the inclined face (21 -2).

11. A method for manufacturing a lens (10) for a ski goggle (50), being, according to any one of the preceding claims, comprising: - Manufacturing of the lens (10) by a single injection of the first portion (11) and the second portion (12).

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