WO2019224828A1 - Article optique - Google Patents

Article optique Download PDF

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Publication number
WO2019224828A1
WO2019224828A1 PCT/IL2019/050588 IL2019050588W WO2019224828A1 WO 2019224828 A1 WO2019224828 A1 WO 2019224828A1 IL 2019050588 W IL2019050588 W IL 2019050588W WO 2019224828 A1 WO2019224828 A1 WO 2019224828A1
Authority
WO
WIPO (PCT)
Prior art keywords
film layer
frame
lens
optical
optical article
Prior art date
Application number
PCT/IL2019/050588
Other languages
English (en)
Inventor
Youval Katzman
Original Assignee
Shamir Optical Industry Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shamir Optical Industry Ltd. filed Critical Shamir Optical Industry Ltd.
Publication of WO2019224828A1 publication Critical patent/WO2019224828A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C1/00—Assemblies of lenses with bridges or browbars
    • G02C1/10—Special mounting grooves in the rim or on the lens
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C1/00—Assemblies of lenses with bridges or browbars
    • G02C1/02—Bridge or browbar secured to lenses without the use of rims
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C1/00—Assemblies of lenses with bridges or browbars
    • G02C1/04—Bridge or browbar secured to or integral with partial rims, e.g. with partially-flexible rim for holding lens
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C2202/00—Generic optical aspects applicable to one or more of the subgroups of G02C7/00
    • G02C2202/16—Laminated or compound lenses

Definitions

  • the presently disclosed subject matter relates to the field of optical articles, optical article assemblies and optical article kits.
  • Lenses of optical articles such as eyeglasses, goggles, masks such as ski masks, visors, helmets etc. are commonly coated on one or both optical surfaces to provide particular optical and other functional qualities to a wearer. Coatings may have anti reflection properties, polarizing properties, scratch resistance properties and/or anti abrasion properties to protect the lens, anti-fog properties, or colourising properties, for example. Conventionally, coatings are provided on the lenses of the optical article by deposition processes. Such processes and methods are costly and time consuming.
  • the presently disclosed subject matter is related to an optical article having at least one lens with a film layer adhered thereto.
  • an optical article for mounting to a frame unit comprising a frame groove, said optical article comprising:
  • a lens having a first optical surface, an opposite second optical surface, and a frame facing wall extending between the first and second optical surfaces and having an apex configured to be received within said frame groove, said apex dividing said frame facing wall into a first portion and a second portion; and a film layer comprising a first film surface adhered to at least a majority of said first optical surface, an opposite second film surface, and a film layer side wall extending between the first surface and the second film surface;
  • first portion of the frame facing wall and said film layer side wall define together a frame facing surface having at least one vertex diving the frame facing surface into at least a first sub-portion extending between said vertex and the second film surface and a second sub-portion extending between the vertex and the apex.
  • an optical article assembly comprising:
  • a frame unit comprising a frame groove
  • an optical article mounted to said frame unit said optical article comprising: a lens having a first optical surface, an opposite second optical surface, and a frame facing wall extending between the first and second optical surfaces and having an apex received within said frame groove, said apex dividing said frame facing wall into a first portion and a second portion; and
  • a film layer comprising a first film surface adhered to at least a majority of said first optical surface, an opposite second film surface, and a film layer side wall extending between the first surface and the second film surface;
  • said first portion of the frame facing wall and said film layer side wall define together a frame facing surface having at least one vertex diving the frame facing surface into at least a first sub-portion extending between said vertex and the second film surface and a second sub-portion extending between the vertex and the apex; and wherein said film layer side wall is at least partially facing a clearance surface of the frame unit and spaced therefrom by a gap which is free of material having the same or greater rigidity than that of the clearance surface.
  • an optical article kit comprising:
  • a frame unit comprising a frame groove
  • optical article configured to be mounted to said frame unit, said optical article comprising:
  • 02647913U9-01 a lens having a first optical surface, an opposite second optical surface, and a frame facing wall extending between the first and second optical surfaces and having an apex configures to be received within said frame groove, said apex dividing said frame facing wall into a first portion and a second portion;
  • a film layer comprising a first film surface adhered to at least a majority of said first optical surface, an opposite second film surface, and a film layer side wall extending between the first surface and the second film surface;
  • said first portion of the frame facing wall and said film layer side wall define together a frame facing surface having at least one vertex diving the frame facing surface into at least a first sub-portion extending between said vertex and the second film surface and a second sub-portion extending between the vertex and the apex; and wherein when said optical article is mounted to said frame unit, said film layer side wall is at least partially facing a clearance surface of the frame unit and spaced therefrom by a gap which is free of material having the same or greater rigidity than that of the clearance surface.
  • vertex refers to a critical line or an inflection line of a surface at which two sub-surfaces meet, or to any other common definition of this term.
  • optical article refers to any article which provides optical properties, or optical protection, to a wearer.
  • optical articles may include, but are not limited to, eyeglasses, goggles, masks such as ski masks, visors and helmets, for example.
  • the frame groove is a portion of the frame unit configured for mounting the lens of the optical article to the frame unit.
  • forces such as pressure forces, compressive forces, tensile forces and/or shear forces are transferred between the lens and the frame groove.
  • Such forces if transferred to the adhered film layer would result in undesirable effects such as bubbles and waves as the film layer would become separated from the first optical surface of the lens at the surface at which it was adhered, or optical distortions due to stresses in the film and/or adhesive. Bubbles, waves and distortions can reduce the aesthetic appearance of the optical article and impair the visibility through the optical article's lenses.
  • due to the frame unit forces such as pressure forces, compressive forces, tensile forces and/or shear forces are transferred between the lens and the frame groove.
  • Such forces if transferred to the adhered film layer would result in undesirable effects such as bubbles and waves as the film layer would become separated from the first optical surface of the lens at the surface at which it was adhered, or optical distortions due to stresses in the film and/or adhesive. Bubble
  • the frame unit can support the optical article, and in particular the lens of the optical article, in a robust and resilient manner, while eliminating the above undesirable effects.
  • the spacing of any part of the film layer from the clearance surface ensures that no forces will be transferred to that part of the film layer. Consequently, the above-described undesirable effects can be eliminated at those parts of the film layer.
  • any one or more of the features, designs and configurations below can be incorporated in the frame unit, the optical article, the optical article assembly and the optical article kit of the first, second and third aspects of the presently disclosed subject matter, independently or in combination thereof.
  • the film layer of the presently disclosed subject matter is adhered to a given lens in order to provide one or more optical and/or mechanical properties to the lens.
  • the film layer may comprise anti-reflection properties, polarizing properties, photochromic properties, anti-fog properties, colourising properties, UV or IR reflective or absorbing properties, scratch resistance properties, anti-abrasion properties and/or self-healing properties to protect the lens.
  • the film layer may comprise a film material such as a thermoplastic polymer (e.g., TAC [Triacetate Cellulose], PET [Polyethylene Terephthalate]).
  • the film layer may be provided as a sticker, and may be adhered to the lens by an adhesive layer of glue or other adhesives provided therewith, for example, commercially available optically clear adhesive.
  • the film layer side wall may be at least a part of an outer peripheral surface of the film layer, or the entire outer peripheral surface.
  • a thickness of the film layer between the first film surface and the second film surface may be in the range of 10-1500 microns.
  • At least a majority of the second film surface may be spaced from the clearance surface, or any other portion of the frame unit.
  • At least a majority of the first film surface may be spaced from the clearance surface, or any other portion of the frame unit.
  • the entire film layer may be spaced from any portion of the frame unit.
  • the entire film layer may be spaced from the frame groove.
  • the at least one vertex may be located on the first portion of the frame facing wall.
  • the gap may be formed between the film layer side wall together with the first sub-portion and the clearance surface.
  • the frame unit may further comprise a first frame interior wall, a first groove rim disposed between the first frame interior wall and the frame groove, a second frame interior wall, and a second groove rim disposed between the second frame interior wall and the frame groove; wherein said lens further comprises a first lens edge at which said frame facing wall and said first optical surface meet, and a second lens edge at which said frame facing wall and said second optical surface meet; and wherein the first lens edge is spaced from the second lens edge by a lens edge thickness; and wherein a direction of curvature of said frame facing surface produced by said vertex is concave if a groove thickness defined as a distance between the first groove rim and the second groove rim is smaller than said lens edge thickness, and said direction of curvature is convex if said groove thickness is greater than said lens side thickness.
  • the clearance surface may constitute at least a part of at least one of the frame groove and the first frame interior wall.
  • the clearance surface may at least partially face the first sub-portion.
  • the first sub-portion including at least a part of the film layer side wall, may be spaced from the clearance surface by a gap which is free of material having the same or greater rigidity than that of the clearance surface.
  • a distance across the gap between the film layer side wall and the clearance surface may be between 0.01 mm and 5 mm.
  • the above mentioned gap of the first, second and third aspects is formed between the film layer side wall and the clearance surface, and there is a need to minimize this gap for esthetical and safety reasons, so that the gap will be minimally noticed and felt in contact by a user of the optical article assembly. In other words, the gap should not be
  • the above mentioned gap of the first, second and third aspects is formed between the film layer side wall and the clearance surface
  • the direction of curvature of said frame facing surface produced by said vertex is convex so as to form the gap between the first sub-portion together with the film layer side wall and the clearance surface of the frame unit, which may at least partially include said frame groove.
  • the frame groove has dimensions which are larger than the lens edge together with the film layer side wall, and it has an inclined shape, the gap should be not visible to an onlooker and thus should not impair the aesthetic appearance of the optical article assembly.
  • the first sub-portion and the film layer side wall may be flat and coplanar.
  • the vertex may be located on the film layer side wall and a direction of curvature of the film layer side wall produced by said vertex may be convex.
  • the at least one vertex may be consisted by a first vertex located on the first portion and a second vertex located on the film layer side wall.
  • the film layer may further comprise a first film edge at which said first film surface and said film layer side wall meet and which engages a lens edge at which the first sub-portion and the first optical surface meet.
  • the second sub-portion may be shaped complementary to a shape of the frame groove for at least partially engaging the frame groove upon mounting the optical article to the frame.
  • the optical article can further comprise an adhesive layer configured for adhering said first film surface to said first optical surface.
  • the film layer may comprise a first film edge at which the first film surface and the film layer side wall meet, and the first film edge may be spaced from the clearance surface by the gap.
  • the first film edge may be in contact with a lens edge of the lens at which the first optical surface and the frame facing wall meet.
  • the first sub-portion may be spaced from the clearance surface by the gap, it would require great distortion or relative movement between the lens and the frame unit to bring the frame unit into contact with the film layer side wall. Consequently, the chances of accidental force transfer between the frame unit and the film layer are reduced, and the above-described undesirable effects can be further eliminated.
  • the gap may be defined by the clearance surface, the first sub-portion and the film layer side wall.
  • the film layer side wall and the first sub-portion may be disposed consecutively.
  • the first film surface may be adhered to the entirety of the first optical surface. With this arrangement, the optical properties provided by the film can be provided over the entirety of the first optical surface of the lens.
  • the gap may be free of material having the same or greater rigidity than that of the film layer.
  • the gap is free of material having the same or greater rigidity than that of the film layer, then if any forces are transferred through the gap, then any material in the gap which is less rigid than the film layer can deform before the film layer is forced away from the first optical surface of the lens, thereby absorbing at least some of the transferred forces, avoiding bubbles, waves and distortions and mitigating the above- described undesirable effects.
  • the gap may be free of any material. No forces are transferred via the gap if the gap is free of any material, thus the above-described undesirable effects can be eliminated.
  • a filler may be at least partially disposed in the gap, wherein the filler may comprise a material having a rigidity lower than that of at least one of the clearance surface and the film layer. Since the material of the filler has a rigidity lower than that of at least one of the clearance surface and the film layer, then any deformation, which
  • 02647913U9-01 would otherwise be caused in the lens by forces transferred to the lens, will be at least partially absorbed by the material which is of lower rigidity than that of at least one of the clearance surface and the film layer. Consequently, the presence of bubbles, waves and distortions between the adhered film layer and the first optical surface of the lens will be reduced and visibility in terms of clarity of the lens and lack of distortion of light will be increased.
  • an optical article for mounting to a frame unit by means of at least one first fastening element having a shaft with a first diameter and at least one second fastening element having a maximal second diameter of its circumscribing circle being greater than said first diameter and configured for securing the first fastening element in place; said optical article comprising:
  • a lens having a first optical surface, and an opposite second optical surface; and a film layer comprising a first film surface adhered to at least a majority of said first optical surface, an opposite second film surface, and a film layer borehole formed in said film layer and defined by a film layer mounting wall extending between the first optical surface and the second optical surface;
  • said lens together with said film layer comprise a borehole extending therethrough and comprising a central portion formed in said lens and having a central portion diameter for receiving therethrough said first fastening element, and an end portion in communication with said central portion and formed at least in said film layer for accommodating said second fastening element, said end portion includes said film layer borehole and has a minimal end portion diameter of an inscribed circle which is greater than said maximal second diameter, such that upon mounting of said frame unit to said lens by said first fastening element and said second fastening element, a gap is maintained between the film layer mounting wall and the second fastening element and said gap is free of material having the same or greater rigidity than that of the end portion.
  • an optical article assembly comprising:
  • a frame unit comprising at least one first fastening element having a shaft with a first diameter and at least one second fastening element having a maximal second diameter of its circumscribing circle being greater than said first diameter and configured for securing the first fastening element in place;
  • optical article mounted to said frame unit by means of said first fastening element and said second fastening element, said optical article comprising:
  • a lens having a first optical surface, and an opposite second optical surface
  • a film layer comprising a first film surface adhered to at least a majority of said first optical surface, an opposite second film surface, and a film layer borehole formed in said film layer and defined by a film layer mounting wall extending between the first optical surface and the second optical surface;
  • said lens together with said film layer comprise a borehole extending therethrough and comprising a central portion formed in said lens and having a central portion diameter through which said first fastening element is received, and an end portion in communication with said central portion and formed at least in said film layer for accommodating said second fastening element, said end portion includes said film layer borehole and has a minimal end portion diameter of an inscribed circle which is greater than said maximal second diameter, such that a gap is maintained between the film layer mounting wall and the second fastening element and said gap is free of material having the same or greater rigidity than that of the end portion.
  • an optical article kit comprising:
  • a frame unit comprising at least one first fastening element having a shaft with a first diameter and at least one second fastening element having a maximal second diameter of its circumscribing circle being greater than said first diameter and configured for securing the first fastening element in place;
  • an optical article comprising:
  • a lens having a first optical surface, and an opposite second optical surface; and a film layer comprising a first film surface adhered to at least a majority of said first optical surface, an opposite second film surface, and a film layer borehole formed
  • said lens together with said film layer comprise a borehole extending therethrough and comprising a central portion formed in said lens and having a central portion diameter for receiving therethrough said first fastening element, and an end portion in communication with said central portion and formed at least in said film layer for accommodating said second fastening element, said end portion includes said film layer borehole and has a minimal end portion diameter of an inscribed circle which is greater than said maximal second diameter, such that upon mounting of said frame unit to said lens by said first fastening element and said second fastening element, a gap is maintained between the film layer mounting wall and the second fastening element and said gap is free of material having the same or greater rigidity than that of the end portion.
  • the borehole is a portion of the frame unit configured for mounting the lens of the optical article to the frame unit.
  • forces such as pressure forces, compressive forces, tensile forces and/or shear forces are transferred between the lens and the frame groove.
  • Such forces if transferred to the adhered film layer would result in undesirable effects such as bubbles and waves as the film layer would become separated from the first optical surface of the lens at the surface at which it was adhered, or optical distortions due to stresses in the film and/or adhesive. Bubbles, waves and distortions can reduce the aesthetic appearance of the optical article and impair the visibility through the optical article's lenses.
  • the frame unit can support the optical article, and in particular the lens of the optical article, in a robust and resilient manner, while eliminating the above undesirable effects.
  • the spacing of the film layer mounting portion from the second fastening element ensures that no forces will be transferred to that part of the film layer. Consequently, the above-described undesirable effects can be eliminated at the film layer.
  • the film layer of the presently disclosed subject matter is adhered to a given lens in order to provide one or more optical and/or mechanical properties to the lens.
  • the film layer may comprise anti-reflection properties, polarizing properties, photochromic properties, anti-fog properties, colourising properties, UV or IR reflective or absorbing properties, scratch resistance properties, anti-abrasion properties and/or self-healing properties to protect the lens.
  • the film layer may comprise a film material such as a thermoplastic polymer.
  • the film layer may be provided as a sticker, and may be adhered to the lens by an adhesive layer of glue or other adhesives provided therewith.
  • the gap may be maintained between the entire film layer and the second fastening element.
  • the end portion may further be formed in the lens.
  • the central portion diameter may be substantially equal to the first diameter for firmly receiving therethrough the first fastening element.
  • the end portion may comprise: an end sub-portion having a sub-portion side wall formed in said lens including said first optical surface; and said film layer borehole.
  • the sub-portion side wall and the film layer mounting wall may be flat and coplanar.
  • the film layer may further comprise a first film edge at which said first film surface and said film layer mounting wall meet and which engages a lens edge at which the sub-portion side wall and the first optical surface meet.
  • the first film edge may be in contact with the lens edge.
  • the film layer mounting wall and the sub-portion side wall may be disposed consecutively.
  • a central portion side wall of said central portion may be is parallel to the sub portion side wall.
  • the film layer mounting wall may be parallel to the sub-portion side wall.
  • the film layer mounting wall may be coplanar with the sub-portion side wall, both having the minimal end portion diameter.
  • the end portion may have a cylindrical shape configured for encircling the second fastening element.
  • the end sub-portion may comprise a shoulder extending between the central portion of the sub-portion side wall.
  • the shoulder can be perpendicular to the central portion side wall and to the sub-portion side wall.
  • the optical article may further comprise an adhesive layer configured for adhering said first film surface to said first optical surface.
  • the first fastening element may be a screw and the at least one second fastening element may be constitutes by a washer and a nut.
  • the maximal second diameter may be a diameter of the washer.
  • a thickness of the film layer between the first film surface and the second film surface may be in the range of 10-1500 microns.
  • At least a majority of the second film surface may be spaced from the second fastening element, or any other portion of the frame unit.
  • At least a majority of the first film surface may be spaced from the second fastening element, or any other portion of the frame unit.
  • the entire film layer may be spaced from any portion of the frame unit.
  • the gap may be formed between the film layer mounting wall together with the sub-portion side wall and the second fastening element.
  • a distance across the gap between the film layer mounting wall and the second fastening element may be between 0.01 mm and 5 mm.
  • the distance across at least a part of the gap can be constant.
  • the film layer may comprise a first film edge at which the first film surface and the film layer mounting wall meet, and the first film edge may be spaced from the second fastening element by the gap.
  • the first film surface may be adhered to the entirety of the first optical surface. With this arrangement, the optical properties provided by the film can be provided over the entirety of the first optical surface of the lens.
  • the gap may be free of material having the same or greater rigidity than that of the film layer.
  • the gap is free of material having the same or greater rigidity than that of the film layer, then if any forces are transferred through the gap, then any material in the gap which is less rigid than the film layer can deform before the film layer is forced away from the first optical surface of the lens, thereby absorbing at least some of the transferred forces, avoiding bubbles, waves and distortions and mitigating the above- described undesirable effects.
  • the gap may be free of any material. No forces are transferred via the gap if the gap is free of any material, thus the above-described undesirable effects can be eliminated.
  • a filler may be at least partially disposed in the gap, wherein the filler may comprise a material having a rigidity lower than that of at least one of the clearance surface and the film layer. Since the material of the filler has a rigidity lower than that of at least one of the clearance surface and the film layer, then any deformation, which would otherwise be caused in the lens by forces transferred to the lens, will be at least partially absorbed by the material which is of lower rigidity than that of at least one of the clearance surface and the film layer. Consequently, the presence of bubbles, waves and distortions between the adhered film layer and the first optical surface of the lens will be reduced and visibility in terms of clarity of the lens and lack of distortion of light will be increased.
  • the borehole can be formed by a drilling machine, or any other suitable means, before or after adherence of the film layer to the lens.
  • the first fastening element may comprise one or more of the following elements: a screw, a shaft, a rivet.
  • the second fastening element may comprise one or more of the following elements: a washer, a nut, and a compressible element, a rivet.
  • Fig. 1A shows a top view of an optical article assembly according to a first example, according to the fourth, fifth and sixth aspects of the presently disclosed subject matter;
  • Fig. IB shows a perspective view of the optical article assembly of Fig. 1 A;
  • Fig. 1C shows a cut-away perspective view of the optical article assembly of Fig. 1A, taken along the line A- A in Fig. 1B;
  • Fig. ID shows an enlarged front view of section AA encircled by a dashed line in Fig. 1C;
  • Fig. 2A shows a top view of an optical article assembly a second example of the presently disclosed subject matter
  • Fig. 2B shows a perspective view of the optical article assembly of Fig. 2A;
  • Fig. 2C shows a cut-away perspective view of the optical article assembly of Fig. 2 A, taken along the line B-B in Fig. 2B;
  • Fig. 2D shows an enlarged front view of section BB encircled by a dashed line in Fig. 2C;
  • Fig. 3A shows a top view of an optical article assembly a third example of the presently disclosed subject matter
  • Fig. 3B shows a perspective view of the optical article assembly of Fig. 3 A;
  • Fig. 3C shows a cut-away perspective view of the optical article assembly of Fig. 3 A, taken along the line C-C in Fig. 3B ;
  • Fig. 3D shows an enlarged front view of section CC encircled by a dashed line in Fig. 3C;
  • Fig. 4A shows a top view of an optical article assembly a fourth example of the presently disclosed subject matter
  • Fig. 4B shows a perspective view of the optical article assembly of Fig. 4A;
  • Fig. 4C shows a cut-away perspective view of the optical article assembly of Fig. 4A, taken along the line D-D in Fig. 4B ;
  • Fig. 4D shows an enlarged front view of section DD encircled by a dashed line in Fig. 4C;
  • FIG. 5A shows a top view of an optical article assembly a fifth example of the presently disclosed subject matter
  • Fig. 5B shows a perspective view of the optical article assembly of Fig. 5 A
  • Fig. 5C shows a cut-away perspective view of the optical article assembly of Fig. 5 A, taken along the line E-E in Fig. 5B;
  • Fig. 5D shows an enlarged front view of section EE encircled by a dashed line in Fig. 5C;
  • Fig. 5E shows an enlarged front view of section FF encircled by a dashed line in Fig. 5C;
  • Fig. 6A shows a top view of an optical article assembly a sixth example of the presently disclosed subject matter
  • Fig. 6B shows a perspective view of the optical article assembly of Fig. 6A;
  • Fig. 6C shows a cut-away perspective view of the optical article assembly of Fig. 6 A, taken along the line F-F in Fig. 6B;
  • Fig. 6D shows an enlarged front view of section FF encircled by a dashed line in Fig. 6C.
  • Fig. 1A shows an optical article assembly 100 comprising a frame unit 110 and an optical article 102 including a lens 150.
  • the optical article assembly 100 according to the present exemplary embodiment is a pair of eyeglasses of the rimless type. It is appreciated that the optical article assembly 100 has an additional lens and additional portions of the frame unit 110, which together form eyeglasses. Flowever, these additional elements are not shown in the drawings for reasons of simplicity in describing the presently disclosed subject matter. With reference to Figs.
  • the frame unit 110 could be considered to be either an arm 112 or a bridge 114, together with the first fastening elements in the form of connecting screws 116, and second fastening elements in the form of washers 118 and nuts 120.
  • the frame unit 110 comprises a lens mounting portion 111, which is a portion of the frame unit 110 configured for mounting the lens 150 to the frame unit 110.
  • the frame unit 110
  • 02647913U9-01 comprises four compressible washers 118, 118', 118" and 118"', two nuts 120 and 120', two connecting screws 116 and 116', and portions of the arm 112 and the bridge 114.
  • the screws 116 and 116' pass through the lens 150, thereby preventing relative rotation of the bridge 114 and the lens 150 once the screws 116, 116' and the nuts 120, 120' have been tightened.
  • the optical article 102 comprises the lens 150 and two film layers 162, 164 adhered to opposite sides of the lens 150.
  • the washers 118, 118' and the nut 120 are configured for securing the screw 116 in place for mounting the frame unit 110 to the optical article 102, together with the rest of the fastening elements of the frame unit 110.
  • the lens 150 comprises first and second optical surfaces 152, 154, and a frame mounting portion 157 having a frame facing wall l57a disposed between the first and second optical surfaces 152, 154.
  • the frame mounting portion 157 is arranged for mounting the lens 150 to the lens mounting portion 111.
  • each optical surface 152, 154 of the lens 150 is adhered to a respective film layer 162, 164; however it is also envisaged that a film layer 162, 164 may be adhered to only one or the other of the optical surfaces 152, 154.
  • Extending through the film layers 162, 164 and the lens 150 are boreholes which provide passageway for the screws 116 and 116' of the lens mounting portion 111.
  • a borehole 140 of the screw 116 comprises a central portion 156 having a central portion diameter Kl through which a shaft 115 of the screw 116 having substantially the same first diameter Sl is firmly received, and two end portions 158a and 158b in communication with the central portion 156, formed in the lens 150 and the film layers 162 and 164 for accommodating the washer 118, and the washer 118' together with its nut 120, respectively.
  • Each one of the two end portions l58a and l58b has an end sub-portion having a sub-portion side wall l44a and l44b formed in the respective lens.
  • the washers 118 and 118' are wider than the nut 120, and each has a maximal second diameter S2 of its circumscribing circle which is greater than the first diameter Sl.
  • the end portions 158a and 158b have a minimal end portion diameter K2 of an inscribed circle which is greater than the maximal second diameter S2.
  • the borehole comprises a narrower central borehole 156 having two wider countersunk end portions l58a and l58b.
  • the change in borehole diameter occurs at a respective shoulder l59a and l59b provided in each of the end portions l58a and l58b, and being parts of the end sub-portions of the respective end portion.
  • the shoulders l59a and l59b are arranged to be parallel to one another even if the lens curvature differs on each of the surfaces 152 and 154, to ensure that compression forces from the screw 116 are evenly applied to the lens 150.
  • the borehole arrangement is a circular-cylindrical arrangement; however it is envisaged that the boreholes may have other suitable cross sections for engagement of the lens mounting portion and for providing a gap from the clearance portion.
  • the borehole for the screw 116 is bored through both the film layers 162, 164 and the lens 150 using known boring techniques which are capable of forming boreholes without damaging or disrupting the level of adhesion of the film adjacent to the end portions l58a and l58b. The same applies to the borehole for the screw 116'.
  • the bridge 114 is mounted to the lens 150 by the screw 116, which passes through the bridge 114, followed by a washer 118 which abuts at a first surface against a side of the bridge 114, and at a second surface against the shoulder l59a.
  • the screw 116 continues to pass through the central portion 156 of the borehole, through the washer 118' which abuts against the shoulder l59b, and finally through the nut 120 which fastens to the end of the screw 116 and can be tightened to achieve a secure connection between the bridge 114 and the lens 150.
  • the maximal second diameter S2 of the washers 118 and 118' is smaller than the minimal end portion diameter K2 of the end portions l58a and l58b, even when the washers 118 and 118' are compressed by the screw 116 being tightened to achieve a secure connection.
  • This provides annular gaps between the washers 118 and 118' and the inner circumferential surface of the end portions 158a and l58b.
  • the washer 118 is arranged to have a depth greater than that of the washer 118' even when compressed, to hold the bridge 114 away from the film layer 162.
  • the bridge 114 is shown as being mounted to the first optical surface 152 of the lens 150, it is also envisaged that the attachment arrangement may be reversed, so that the bridge 114 is mounted to the second optical surface 154 of the lens 150. In any event, the bridge 114 is capable of being mounted to a convex or a concave surface of a lens.
  • the lens mounting portion 111 comprises a lens engaging surface 117 that engages the lens 150.
  • the lens engaging surface 117 is considered to be an outer circumferential surface of the shaft 115 of the screw 116 that passes through the narrow central portion 156 of the borehole, together with portions of the washers 118 and 118' which engage the lens 150.
  • the surfaces of the lens mounting portion 111 which face but do not contact the film layers 162, 164 can be considered to be clearance surfaces 119 and 119' of the washers 118, 118' and the nut 120.
  • the clearance surface 119 comprises the portion of the outer circumferential surface of the washer 118 which faces the film layer 162, while the clearance surface 119' comprises the outer circumferential surfaces of the nut 120 and the washer 118'.
  • the frame facing wall l57a is the wall of the borehole portions 156, l58a and l58b which pass through the lens 150.
  • the frame facing wall l57a has a frame engaging surface 155 which is the inner circumferential surface of the narrower central portion 156 of the borehole.
  • the frame engaging surface 155 engages the lens engaging surface 117.
  • the inner circumferential surface of the central portion 156 of the borehole engages the outer circumferential surface of the screw 116.
  • a first surface l63a, l65a of each of the film layers 162, 164 contacts and is adhered to the entire respective optical surface 152, 154 at which it is located. This allows the optical properties provided by the film to be provided over the entirety of the first optical surface of the lens 150.
  • Each of the film layers 162, 164 has a second surface l63b, l65b, opposite to and separated from the respective first surface l63a, l65a by means of a respective film layer borehole formed in each of the film layers 162, 164 and defined by a film layer
  • the film layer boreholes of the film layers 162, 164 are constituting part of the end portions l58a and l58b, and being disposed consecutively to their respective end sub-portions.
  • the film layer side wall l66a faces the clearance surface 119
  • the film layer side wall l66b faces the clearance surface 119'.
  • the film layer side wall l66a is adjacent to, i.e. consecutive with, the sub-portion side wall l44a
  • the film layer side wall l66b is adjacent to, i.e. consecutive with, the sub-portion side wall l44b.
  • a thickness of each film layer 162, 164 between the respective first film surface l63a, l65a and the respective second film surface l63b, l65b is 190 microns
  • a thickness of the adhesive between the first surface of the film l63a, l65a and the respective optical surface 152, 154 is 50 microns.
  • the film layer side wall l66a is spaced from the clearance surface 119 by the gap 130
  • the film layer side wall l66b is spaced from the clearance surface 119' by the gap 130'. Due to the gaps 130, 130', the entirety of each film layer 162, 164 - which includes the entirety of both the first film surface l63a, l65a and second film surface l63b, l65b of each film layer 162, 164 - is spaced from the respective clearance surface 119, 119'.
  • the gaps 130, 130' are shown as being free of any material, although a filler less rigid than the film layers 162, 164 and/or less rigid than the clearance surfaces 119, 119' can be provided in the gaps 130, 130'.
  • the gaps 130, 130' provide a spacing between the respective film layer 162, 164 and the lens mounting portion 111, there is prevented a transfer of forces between the frame unit 110 and the film layers 162, 164 adhered to the lens 150.
  • Such forces if transferred to the adhered film layers 162, 164 would result in undesirable effects such as bubbles and waves as the film layers 162, 164 would become separated from the respective optical surface 152, 154 of the lens at the first surface l63a, l65a at which they are adhered, or optical distortions due to axial and transverse stresses in the film and/or adhesive. Bubbles, waves and distortions can reduce the aesthetic appearance of the optical article and impair the visibility through the optical article' lenses.
  • the frame unit 110 can support the lens 150 in a robust and resilient manner, while eliminating the above undesirable
  • the film layer 162 comprises a first film edge 168, which is an edge at which the first film surface l63a and the film layer side wall l66a meet.
  • the first film edge 168 is spaced from the clearance surface 119 of the lens mounting portion 111 by the gap 130.
  • Di is a distance across the gap 130 between the film layer side wall l66a and the clearance surface 119.
  • the distance Di is substantially constant along the film layer side wall, and may be between 0.01 mm and 3 mm. Such a distance is not apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such a distance is also not visible to an onlooker and thus does not impair the aesthetic appearance of the glasses.
  • the gap 130 is defined by the clearance surface 119, the film layer side wall 166a, the shoulder 159a and the sub-portion side wall 144a.
  • the sub-portion side wall 144a is a portion of the lens 150 which is free of contact with the frame unit 110.
  • the sub-portion side wall 144a faces the clearance surface 119 and is spaced from the clearance surface 119 by the gap 130.
  • not only the film layer 162, 164 is spaced from the clearance surface 119 of the frame unit 110, but also a portion of the lens 150. In this manner, even if the lens undergoes some slight distortion or applied force, the film layer 162, 164 will not accidentally come into contact with the frame unit 110.
  • the first film edge 168 is adjacent to, i.e. consecutive with, the frame facing wall 157a, and is in contact with a lens edge 153a of the lens 150.
  • the lens edge 153a is an edge of the lens 150 at which the first optical surface 152 and the frame facing wall 157a meet.
  • the borehole may be of constant diameter throughout, and the film layer may have an annular section removed surrounding the borehole. This may leave a surface with some adhesive film remaining between a bolt, rivet, pin or other connecting component and the borehole. Flowever, this section of adhesive film functions as a part of the frame unit, in avoiding damage to the lens and further allowing the connecting component to be isolated in terms of direct load transfer between the clearance surface and the film layer which surrounds the borehole.
  • the film layer may have a circular section removed surrounding the
  • the lens mounting portion comprises a rivet
  • a rivet may comprise a compressible media, such as one or more of rubber, silicone and neoprene, for example.
  • the rivet may be configured to conform to fill a cavity in the lens, such as an end portion 158a, 158b of the borehole, and to apply force to at least some walls of the cavity.
  • the use of a rivet may obviate the need for a nut.
  • Fig. 2 A shows an optical article assembly 200 comprising a frame unit 210 and an optical article 205 including a lens 250 mounted to the frame unit 210.
  • the optical article assembly 200 according to the present exemplary embodiment is a pair of eyeglasses of the rimmed type, i.e. where the frame unit 210 surrounds the optical article 205 and its lens 250. It is appreciated that the optical article assembly 200 has an additional lens and additional portions of the frame unit 210, which together form eyeglasses. However, these additional elements are not shown in the drawings for reasons of simplicity in describing the presently disclosed subject matter. With reference to Figs.
  • the frame unit 210 may comprise a single plastic, polymer or other material moulding into which lens 250 is arranged to be fitted.
  • the purpose of the frame unit is to support the lens to maintain the optical article in a structurally sound manner and allow comfortable placement on the wearer.
  • the frame unit may alternatively comprise a structure, such as a metal, plastic, polymer natural material or other frame, which may be a single structure, or may comprise several portions which are arranged to be connected to fully or partially surround and support the lens.
  • the frame unit 210 comprises a lens mounting portion 212 disposed on the inner circumferential surface of the frame unit 210, having two clearance surfaces 214, 214' and a frame groove 218.
  • the frame groove 218 is provided as an annular groove formed in the inner circumferential surface of the lens mounting portion 212, having a radial profile arranged to receive and at least
  • 02647913U9-01 partially conform with an annular protrusion having a corresponding profile, protruding radially outwardly from the outer circumferential surface of the lens 250.
  • the lens 250 shown is a converging lens (with positive optical power) designed to correct Hyperopia. Such lenses naturally are thicker in their center and thinner towards their peripheral edge.
  • the lens 250 comprises a first optical surface 252 and a second optical surface 254, opposite to the first optical surface 252. Adhered to each optical surface 252, 254 is a respective film layer 262, 264.
  • the lens 250 comprises a frame mounting portion 256 having a frame facing wall 258 disposed between the first and second optical surfaces 252, 254 of the lens 250 and having an apex 251 received within the frame groove 218.
  • the apex 251 divides the frame facing wall 258 to a first portion 260a and a second portion 260b.
  • the frame facing wall 258 has a frame engaging surface 259 which engages the frame groove 218.
  • the frame engaging surface 259 comprises an annular protrusion, protruding radially outwardly from the outer circumferential surface of the lens 250.
  • the annular protrusion is arranged to be received in the frame groove 218, and has a radial profile arranged to at least partially conform with that of the frame groove 218.
  • Each film layer 262, 264 comprises a first surface 263a, 265a which is adhered to the entirety of the respective optical surface 252, 254 of the lens 250, and a second surface 263b, 265b, opposite to the first surface, which faces away from the lens 250. Since the first surfaces 263a, 265a are adhered to the entirety of the respective optical surfaces 252, 254, the optical properties provided by the film layers 262, 264 can be provided over the entirety of the respective optical surfaces 252, 254. Between the first and second surfaces of each film layer 262, 264 is a respective film layer side wall 266, 266'. The film layer side wall 266 faces the clearance surface 214, and the film layer side wall 266' faces the clearance surface 214'.
  • the first portion 260a of the frame facing wall 258 and the film layer side wall 266' define together a frame facing surface 260a' having a vertex 270 located on the first portion 260a and diving the frame facing surface 260a' into at least a first sub-portion 271 a extending between the vertex 270 and the second film surface 265b and a second sub-portion 27 lb extending between the vertex 270 and the apex 251.
  • a thickness of each film layer 262, 264 between the respective first film surface 263a, 265a and the respective second film surface 263b, 265b is 190 microns
  • a thickness of the adhesive between the first surface of the film 263a, 265a and the respective optical surface 252, 254 is 50 microns.
  • the film layer side walls 266, 266' of the film layers 262, 264 are disposed adjacent to, i.e. consecutively with, the frame facing wall 258 of the lens 250, and are spaced from the respective clearance surface 214, 214' by a respective gap 230, 230'.
  • the gaps 230, 230' are shown as being free of material. Therefore any forces, such as compressive forces, between the frame unit 210 and the lens 250 when they are mounted together, will not be transferred to the film layer 262, 264, rather to the lens 250 itself via the frame groove 218 and the frame engaging surface 259.
  • a distance across the gap 230' between the film layer side wall 266' and the clearance surface 214' varies between a shorter distance D 2 and a longer distance D2'.
  • Such distances D 2 , D 2 ' may be between 0.01 mm and 5 mm.
  • Such distances are not apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such distances are also not visible to an onlooker and thus does not impair the aesthetic appearance of the glasses.
  • distances across the gap 230 also vary.
  • the gaps 230, 230' may comprise a filler having a lower rigidity, i.e. being more easily deformable, than the film layers 262, 264 and/or than the clearance surfaces 214, 214' of the lens mounting portion 212, such that the filler will deform first before applying force and deformation to the film layers 262, 264.
  • the film layer side wall 266' of the film layer 264 is parallel to, and extends along, a part of an imaginary surface I extending from the frame facing wall 258 towards and beyond the respective first optical surface 254.
  • the entire film layers 262, 264 which include all of the first film surfaces 263a, 265a and second film surfaces 263b, 265b are spaced from the lens mounting portion 212 by the gaps 230, 230'. This spacing ensures that no forces
  • 02647913U9-01 will be transferred to the film surfaces 263a, 263b, 265a, 265b. Consequently, the above-described undesirable effects can be eliminated at those parts of the film surfaces 263a, 263b, 265a, 265b or any other part of the film layers 262, 264.
  • the film layer 262 comprises a first film edge 268, which is an edge at which the respective first film surface 263a and the film layer side wall 266 meet. As shown in Fig. 2D, the first film edge 268 is spaced from the clearance surface 214 by the gap 230. The first film edge 268 is in contact with a first lens edge 253 of the lens 250 at which the optical surface 252 and the frame facing wall 258 meet.
  • the first sub-portion 27 la faces the clearance surface 214' and is spaced from the clearance surface 214' by the gap 230'.
  • the gap 230' is defined by the clearance surface 214' and the first sub-portion 27 la. Since the first sub-portion 27 la is spaced from the clearance surface 214' by the gap 230, it would require great distortion or relative movement between the lens 250 and the frame unit 210 to bring the frame unit 210 into contact with the film layer side wall 266. Consequently, the chances of accidental force transfer between the frame unit 210 and the film layer 262, 264 are reduced, and the above-described undesirable effects can be further eliminated.
  • the frame unit 210 comprise a first frame interior wall 219a, a first groove rim 2l9a' disposed between the first frame interior wall 2l9a and the frame groove 218, a second frame interior wall 2l9b, and a second groove rim 2l9b' disposed between the second frame interior wall 219a and the frame groove 251.
  • the lens 250 further comprises the first lens edge 253 at which the frame facing wall 258 and the first optical surface 252 meet, and a second lens edge 253' at which the frame facing wall 258 and the second optical surface 254 meet.
  • the first lens edge 253 is spaced from the second lens edge 253' by a lens edge thickness Tl, and the first groove rim 219a' and the second groove rim 219b' are spaced from each other by a groove thickness T2.
  • the direction of curvature of the frame facing surface 260a' produced by the vertex 270 is concave, so as to deflect the first sub-portion 27 la with the film layer side wall 266' toward the frame unit 210, while maintaining the gap therebetween. This deflection, minimizes the gap while still preserving it. Without this deflection, the gap would have
  • the angle al between the two substantially flat side walls of the frame groove 218 is 100°, and the deflection at the vertex 270 is provided by an angle b of 10°.
  • the gap between the film layer side wall 266' and the frame unit 210 is dictated by the geometry of the frame groove 251, there is a need to minimize the gap for esthetical and safety reasons, so that the gap will be minimally noticed and felt in contact by a user of the optical article assembly.
  • the gap should not be apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such a gap should also be not visible to an onlooker and thus should not impair the aesthetic appearance of the optical article assembly (e.g., eyeglasses).
  • the direction of curvature of the frame facing surface 260a' produced by the vertex 270 is concave, so as to deflect the first sub-portion 271a with the film layer side wall 266' toward the frame unit 210, while maintaining the gap.
  • Fig. 3A shows a similar optical article assembly 300 to the optical article assembly 200 described above.
  • the optical article assembly 300 comprises a frame unit 310 and an optical article 305 including a lens 350 mounted to the frame unit 310.
  • the optical article assembly 300 according to the present exemplary embodiment is also a pair of eyeglasses of the rimmed type, i.e. where the frame unit 310 surrounds the optical article 305 and its lens 350. It is appreciated that the optical article assembly 300 has an additional lens and additional portions of the frame unit 310, which together form eyeglasses.
  • these additional elements are not shown in the drawings for reasons of simplicity in describing the presently disclosed subject matter. With reference to Figs.
  • the frame unit 310 may comprise a single plastic, polymer or other material moulding into which lens 350 is arranged to be fitted.
  • the purpose of the frame unit is to support the lens to maintain the optical article in a structurally sound manner and allow comfortable placement on the wearer.
  • the frame unit may alternatively comprise a structure, such as a metal, plastic, polymer natural material or other frame, which may be a single structure, or may comprise several portions which are arranged to be connected to fully or partially surround and support the lens.
  • the frame unit 310 comprises a lens mounting portion 312 disposed on the inner circumferential surface of the frame unit 310, having a clearance surface 314 and a frame groove 318.
  • the frame groove 318 is provided as an annular groove formed in the inner circumferential surface of the lens mounting portion 312, having a radial profile arranged to receive and at least partially conform with an annular protrusion having a corresponding profile, protruding radially outwardly from the outer circumferential surface of the lens 350.
  • the lens 350 shown is a "minus lens” designed to correct Myopia. Such lenses naturally are shallower in their center and deeper towards their peripheral edge.
  • the lens 350 comprises a first optical surface 352 and a second optical surface 354, opposite to the first optical surface 352. Adhered to the first optical surface 352 is a film layer 362.
  • the lens 350 comprises a frame mounting portion 356 having a frame facing wall 358 disposed between the first and second optical surfaces 352, 354 of the lens 350 and having an apex 351 received within the frame groove 318.
  • the apex 351 divides the frame facing wall 358 to a first portion 360a and a second portion 360b.
  • the frame facing wall 358 has a frame engaging surface 359 which engages the frame groove 318.
  • the frame engaging surface 359 comprises an annular protrusion, protruding radially outwardly from the outer circumferential surface of the lens 350.
  • the film layer 362 comprises a first surface 363a which is adhered to the entirety of the first optical surface 352 of the lens 350, and a second surface 363b, opposite to the first surface, which faces away from the lens 350. Since the first surface 363a is adhered to the entirety of the first optical surface 352 of the lens 350, the optical properties provided by the film layer 362 can be provided over the entirety of the first optical surface 352 of the lens 350. Between the first and second surfaces 362a, 362b is a film layer side wall 366. The film layer side wall 366 faces the clearance surface 314.
  • the first portion 360a of the frame facing wall 358 and the film layer side wall 366 define together a frame facing surface 360a' having a first vertex 370a located on the first portion 360a, and a second vertex 370b and diving the frame facing surface 360a' into three sub-portions: a first sub-portion 37 la extending between the first vertex 370a and the second film surface 363b, a second sub-portion 37lb extending between the
  • a thickness of the film layer 362 between the first film surface 363a and the second film surface 363b is 190 microns
  • a thickness of the adhesive between the first surface of the film 363a, 365a and the respective optical surface 352, 354 is 50 microns.
  • the film layer side wall 366 is disposed adjacent to, i.e. consecutively with, the frame facing wall 358, and is spaced from the clearance surface 314 of the lens mounting portion 312 of the frame unit 310 by a gap 330.
  • the gap 330 is shown as being free of material. Therefore any forces, such as compressive forces, between the frame unit 310 and the lens 350 when they are mounted together, will not be transferred to the film layer 362, rather to the lens 350 itself via the frame groove 318 and the frame engaging surface 359. This prevents bubbles, waves and distortions being created in the film layer 362 as a result of separation of the film layer 362 from the first optical surface 352 of the lens 350 at the adhesive first surface 363a of the film layer 362.
  • a distance across the gap 330 between the film layer side wall 366 and the clearance surface 314 varies between a shorter distance D3 and a longer distance D3'.
  • Such distances D3, D3' may be between 0.01 mm and 5 mm.
  • Such distances are not apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such distances are also not visible to an onlooker and thus does not impair the aesthetic appearance of the glasses.
  • the gap 330 may comprise a filler having a lower rigidity, i.e. being more easily deformable, than the film layer 362 and/or than the clearance surface 314 of the lens mounting portion 312, such that the filler will deform first before applying force and deformation to the film layer 362.
  • the film layer side wall 366 of the film layer 362 forms an acute angle b with an imaginary surface G extending from the frame facing wall 358 towards and beyond the first optical surface 352.
  • the effect of this acute angle is to prevent the film layer side wall 366 to be sharp for safety reasons..
  • the entire film layer 362 which includes the first and second film surfaces 363a, 363b is spaced from the lens mounting portion 312. This spacing ensures that no forces will be transferred to the film surfaces 363a, 363b. Consequently, the above-described undesirable effects can be eliminated at those parts of the film surfaces 363a, 363b or any other part of the film layer 362.
  • the film layer 362 comprises a first film edge 368, which is an edge at which the first film surface 363a and the film layer side wall 366 meet. As shown in Fig. 3D, the first film edge 368 is spaced from the clearance surface 314 of the lens mounting portion 312 by the gap 330. The first film edge 368 is adjacent to, i.e. consecutive with, the frame facing wall 358. The first film edge 368 is in contact with a first lens edge 353 of the lens 350 at which the first optical surface 352 and the frame facing wall 358 meet.
  • the first sub-portion 37 la and the second sub-potion 37 lb face the clearance surface 314 and are spaced from the clearance surface 314 by the gap 330.
  • the gap 330 is defined by the clearance surface 314, the first sub-portion 37 la and the second sub potion 37lb. Since the first sub-portion 37la and the second sub-potion 37lb are spaced from the clearance surface 314 by the gap 330, it would require great distortion or relative movement between the lens 350 and the frame unit 310 to bring the frame unit 310 into contact with the film layer side wall 366. Consequently, the chances of accidental force transfer between the frame unit 310 and the film layer 362 are reduced, and the above-described undesirable effects can be further eliminated.
  • the frame unit 310 comprise a first frame interior wall 319a, a first groove rim 3l9a' disposed between the first frame interior wall 3l9a and the frame groove 318, a second frame interior wall 3l9b, and a second groove rim 3l9b' disposed between the second frame interior wall 319a and the frame groove 351.
  • the lens 350 further comprises the first lens edge 353 at which the frame facing wall 358 and the first optical surface 352 meet, and a second lens edge 353' at which the frame facing wall 358 and the second optical surface 354 meet.
  • the first lens edge 353 is spaced from the second lens edge 353' by a lens edge thickness T5, and the first groove rim 3l9a' and the second groove rim 3l9b' are spaced from each other by a groove thickness T6.
  • the lens edge thickness T5 is greater than the groove thickness T6
  • the direction of curvature of the frame facing surface 360a' produced by the second vertex 370b is concave, so as to deflect the first sub-portion 37 la with the film layer side wall 366 and the second sub-portion 37lb toward the frame unit 310, while maintaining the gap therebetween. This deflection, minimizes the gap while still preserving it. Without this deflection, the gap would have been greater because its dimensions would have been dictated by the fixed and standard geometry of the frame groove 318.
  • the gap between the film layer side wall 366 and the frame unit 310 is dictated by the geometry of the frame groove 351, there is a need to minimize the gap for esthetical and safety reasons, so that the gap will be minimally noticed and felt in contact by a user of the optical article assembly.
  • the gap should not be apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such a gap should also be not visible to an onlooker and thus should not impair the aesthetic appearance of the optical article assembly (e.g., eyeglasses). Therefore, as mentioned above, the direction of curvature of the frame facing surface 360a' produced by the second vertex 370b is concave.
  • the direction of curvature of the frame facing surface 360a' produced by the first vertex 370a is convex, for safety reasons mentioned above.
  • Figs. 4A-4D show a similar optical article assembly 400 to the optical article assemblies 200 and 300 described above.
  • the optical article assembly 400 comprises a frame unit 410 and a lens 450.
  • the optical article assembly 400 according to the present exemplary embodiment is also a pair of eyeglasses of the rimmed type, i.e. where the frame unit 410 surrounds the lens 450.
  • Lens 450 is a "minus-lens" as described above for Figs. 3A-3D. It is appreciated that the optical article assembly 400 has an additional lens and additional portions of the frame unit 410, which together form eyeglasses. However, these additional elements are not shown in the drawings for reasons of simplicity in describing the presently disclosed subject matter.
  • Film layers 462, 464 are adhered to respective first and second optical surfaces 452, 454 of the lens 450 as described above in the optical article assembly 200, and there are gaps 430, 430' having variable distances across the gaps 430, 430, as described above in both optical article assemblies 200 and 300.
  • the frame unit 410 comprises a lens mounting portion 412 disposed on the inner circumferential surface of the frame unit 410, having a lens engaging surface 418, and two clearance surfaces 414, 414', disposed towards the two axial ends of the inner circumferential surface of the lens mounting portion 412.
  • the lens 450 comprises a frame mounting portion 456 having a frame facing wall 458 disposed between the first and second optical surfaces 452, 454 of the lens 450.
  • the frame facing wall 458 has a frame engaging surface 459 which engages the lens engaging surface 418 of the frame unit 410 in the manner described above for optical article assemblies 200 and 300.
  • a frame free surface 455 is disposed between the frame engaging surface 459 of the frame mounting portion 456 and the first optical surface 452.
  • the frame free surface 455 faces the clearance surface 414', and is configured to be spaced from the clearance surface 414' by the gap 430'.
  • the frame free surface 455 is spaced from the frame unit 410.
  • the gap 430 is created between the clearance surface 414 and the film layer side surface 466 - which is the wall of the film layer 464 between the first and second surfaces 465a, 465b of the film layer 464 - by the film layer side surface 466 being angled at an acute angle m relative to the imaginary surface I", and by the film layer side surface 466 being disposed marginally offset from the imaginary surface I".
  • the film layer side surface 466 being angled at an acute angle m relative to the imaginary surface I"
  • an effective gap 430 is still provided.
  • Figs. 5A-5D show an optical article assembly 500, comprising a frame unit 510 and an optical article 505 including a lens 550 mounted to the frame unit 310.
  • the optical article assembly 500 according to the present exemplary embodiment is also a pair of eyeglasses of the rimmed type, i.e. where the frame unit 510 surrounds the optical article 305 and its lens 550. It is appreciated that the optical article assembly 500 has an additional lens and additional portions of the frame unit 510, which together form eyeglasses. However, these additional elements are not shown in the drawings for reasons of simplicity in describing the presently disclosed subject matter.
  • the frame unit 510 comprises a first rigid section 5l0a and second flexible section 5l0b.
  • the flexible section is attached to the rigid section in a taut manner so as to hold the lens 550 in a stable manner due to tension in the flexible section 510b.
  • the flexible section may comprise a cable-type structure.
  • the rigid section 5l0a may comprise a single plastic, polymer or other material moulding into which a portion of the lens 550 is arranged to be fitted.
  • the purpose of the frame unit as a whole is to support the lens to maintain the optical article in a structurally sound manner and allow comfortable placement on the wearer.
  • the rigid section 5l0a and the flexible section 510b frame unit may each comprise a structure, comprising a metal, plastic, polymer natural material or other supportive material, which may be formed as a single structure, or may comprise several portions which are arranged to be connected to fully or partially surround and support the lens 550.
  • the rigid section 5l0a of the frame unit 510 comprises a lens mounting portion 512 disposed on the inner circumferential surface of the rigid section 5l0a, having a clearance surface 514, a first frame groove 518 and a second frame groove 519.
  • the first frame groove 518 and the second frame groove 519 are formed at two opposite sides of a protrusion 517 extending around the inner circumferential surface of the lens mounting portion 512.
  • the protrusion 517 is arranged to be received in a corresponding recess, or recessed channel in a circumferential outer surface of the lens 550, and has a radial profile corresponding to and at least partially conforming with a radial profile of the
  • the first frame groove 518 and the second frame groove 519 are arranged to receive a first apex 55 la and a second apex 55 lb of the lens 550, respectively.
  • Lens 550 comprises a first optical surface 552 and a second optical surface 554, opposite to the first optical surface 552. Adhered to each of the first and second optical surfaces 552, 554 is a respective film layer 562, 564.
  • the lens 550 comprises a frame mounting portion 556 having a frame facing wall 558 disposed between the first and second optical surfaces 552, 554 of the lens 550 and having the first apex 55 la and the second apex 55lb.
  • the first apex 55la divides the respective part of the frame facing wall 558 to a first portion 560a and a second portion 560b.
  • the second apex 55 lb divides another respective part of the frame facing wall 558 to two portions.
  • the frame facing wall 558 has a frame engaging surface 559 which engages the first groove 518 and the second groove 519.
  • the frame engaging surface 559 comprises a recessed channel extending around at least part of an outer circumferential surface of the lens 550, and may further comprise a portion of the outer circumferential surface itself arranged to contact the inner circumferential surface of the lens mounting portion 512 of the rigid section 5l0a as shown.
  • the recessed channel is arranged to receive the protrusion which protrudes radially inwardly from the inner circumferential surface of the lens mounting portion 512, and which extends around the inner circumferential surface of the lens mounting portion 512.
  • the radial profile of the recessed channel is arranged to at least partially conform with, that of the protrusion.
  • the film layers 562, 564 each comprise a first surface 563a, 565a which is adhered to the entirety of the respective optical surface 552, 554 of the lens 550, and a second surface 563b, 565b, opposite to the first surface 563a, 565a, which faces away from the lens 550. Since the first surface 563a, 565a is adhered to the entirety of the respective optical surface 552, 554 of the lens 550, the optical properties provided by the film can be provided over the entirety of the respective optical surfaces 562, 564 of the lens 550. Between the first and second surfaces is a respective film layer side wall 566, 566'.
  • the film layer side wall 566 faces the clearance surface 514 of the lens mounting portion 512 of the rigid section 5l0a of the frame unit 510.
  • the first portion 560a and the film layer side wall 566 define together a frame facing surface 560a' having a vertex 570 located on the first portion 560a and diving the frame facing surface
  • 02647913U9-01 560a' into a first sub-portion extending between the vertex 370a and the second surface 563b, and a second sub-portion extending between the vertex 570 and the first apex 55la.
  • a thickness of each film layer 562, 564 between the respective first film surface 563a, 565a and the respective second film surface 563b, 565b is 190 microns
  • a thickness of the adhesive between the first surface of the film 563a, 565a and the respective optical surface 552, 554 is 50 microns.
  • the film layer side wall 566 is disposed adjacent to, i.e. consecutively with, the frame facing wall 558 of the lens 550, and is spaced from the clearance surface 514 of the lens mounting portion 512 of the rigid section 5l0a of the frame unit 510 by a gap 530.
  • the gap 530 is shown as being free of material. Therefore any forces, such as compressive forces, between the rigid section 5l0a of the frame unit 510 and the lens 550 when they are mounted together, will not be transferred to the film layer 562, rather to the lens 550 itself.
  • the film layer side wall 566' faces a clearance surface 514' so that a gap 530' is formed therebetween. Description below is made with respect to the gap 530, however it should be understood that the same is relevant also to the gap 530'.
  • a distance across the gap 530 between the film layer side wall 566 and the clearance surface 514 varies between a shorter distance Ds and a longer distance Ds'.
  • Such distances Ds, Ds' may be between 0.01 mm and 5 mm.
  • Such distances are not apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such distances are also not visible to an onlooker and thus does not impair the aesthetic appearance of the glasses.
  • distances across the gap 530' also vary.
  • the gap 530 may comprise a filler having a lower rigidity, i.e. being more easily deformable, than the film layer 562 and/or than the clearance surface 514 of the lens mounting portion 512, such that the filler will deform first before applying force and deformation to the film layer 562.
  • the film layer side wall 566 of the film layer 562 is continuous with a frame free surface 555 of the lens 550.
  • the entire film layer 562 which includes the first and second film surfaces 563a and 563b is spaced from the lens mounting portion 512. The same is applies to the film layer 564. This spacing ensures that no forces will be transferred to the film surfaces 563a, 563b. Consequently, the above-described undesirable effects can be eliminated.
  • the film layer 562 comprises a first film edge 568, which is an edge at which the first film surface 563a and the film layer side wall 566 meet.
  • the first film edge 568 is adjacent to the frame free surface 555, and the gap 530 is defined by the clearance surface 514, the frame free surface 555 and the film layer side wall 566. Since the frame free surface 555 is spaced from the clearance surface 514 by the gap 530, it would require great distortion or relative movement between the lens 550 and the rigid portion 5l0a of the frame unit 510 to bring the rigid portion 5l0a of the frame unit 510 into contact with the film layer side wall 566. Consequently, the chances of accidental force transfer between the frame unit 510 and the film layer 562, 564 are reduced, and the above-described undesirable effects can be further eliminated.
  • the flexible section 5l0b comprises a tension member, in the form of a cable 511 which is connected at each end to an end of the rigid section 5l0a, such that together, the rigid section 5l0a and the flexible section 5l0b surround the lens 550.
  • the lens 550 comprises a recessed channel 551 extending around a part of its outer circumferential surface, arranged to receive therein the cable 511 of the flexible section 510b.
  • the cable 511 may be a nylon cable.
  • the cable 511 is situated within the recessed channel 551 within the lens 550, there is no further part of the flexible section 5l0b of the frame unit 510 which could contact or transfer loads directly to either of the film layers 562, 564 which are adhered to the first and second optical surfaces 552, 554 of the lens 550.
  • the lens edge thickness T7 at the region of the first apex 55 la is smaller than the groove thickness T8, the direction of curvature of the frame facing surface 560a' produced by the vertex 570 is convex, so as to deflect the first sub-portion with the film layer side wall 566 away from the frame unit 510, and to form the gap 530 therebetween.
  • Fig. 6 A shows an optical article assembly 600 comprising a frame unit 610 and an optical article 605 including a lens 650 mounted to the frame unit 610.
  • the optical article assembly 600 according to the present exemplary embodiment is a pair of eyeglasses of the rimmed type, i.e. where the frame unit 610 surrounds the optical article 605 and its lens 650. It is appreciated that the optical article assembly 600 has an additional lens and additional portions of the frame unit 610, which together form eyeglasses. However, these additional elements are not shown in the drawings for reasons of simplicity in describing the presently disclosed subject matter. With reference to Figs.
  • the frame unit 610 may comprise a single plastic, polymer or other material moulding into which lens 650 is arranged to be fitted.
  • the purpose of the frame unit is to support the lens to maintain the optical article in a structurally sound manner and allow comfortable placement on the wearer.
  • the frame unit may alternatively comprise a structure, such as a metal, plastic, polymer natural material or other frame, which may be a single structure, or may comprise several portions which are arranged to be connected to fully or partially surround and support the lens.
  • the frame unit 610 comprises a lens mounting portion 612 disposed on the inner circumferential surface of the frame unit 610, having a clearance surfaces 614 being part of a frame groove 618 of the frame unit 610.
  • the frame groove 618 is provided as an annular groove formed in the inner circumferential surface of the lens mounting portion 612, having a radial profile arranged to receive and at least partially conform with an annular protrusion having a corresponding profile, protruding radially outwardly from the outer circumferential surface of the lens 650.
  • the lens 650 comprises a first optical surface 652 and a second optical surface 654, opposite to the first optical surface 652. Adhered to the first optical surface 652 is a
  • the lens 650 comprises a frame mounting portion 656 having a frame facing wall 658 disposed between the first and second optical surfaces 652 and 654 of the lens 650 and having an apex 651 received within the frame groove 618.
  • the apex 651 divides the frame facing wall 658 to a first portion 660a and a second portion 660b.
  • the frame facing wall 658 has a frame engaging surface 659 which engages the frame groove 618.
  • the frame engaging surface 659 comprises an annular protrusion, protruding radially outwardly from the outer circumferential surface of the lens 650.
  • the annular protrusion is arranged to be received in the frame groove 618, and has a radial profile arranged to at least partially conform with that of the frame groove 618.
  • the film layer 662 comprises a first surface 665a which is adhered to the entirety of the first optical surface 652, and a second surface 665b, opposite to the first surface, which faces away from the lens 650. Since the first surfaces 665a is adhered to the entirety of the first optical surface 652, the optical properties provided by the film layers 662 can be provided over the entirety of the respective optical surfaces 652. Between the first and second surfaces of the first film layer 662 extends a film layer side wall 666. The film layer side wall 666 faces the clearance surface 614.
  • the first portion 660a of the frame facing wall 658 and the film layer side wall 666 define together a frame facing surface 660a' having a vertex 670 located on the first portion 660a and diving the frame facing surface 660a' into at least a first sub-portion 671 a extending between the vertex 670 and the second film surface 265b and a second sub-portion 27 lb extending between the vertex 670 and the apex 651.
  • the film layer side walls 666 of the film layers 662 is disposed adjacent to, i.e. consecutively with, the frame facing wall 658 of the lens 650, and are spaced from the clearance surface 614 by a gap 630.
  • the gap 630 is shown as being free of material. Therefore any forces, such as compressive forces, between the frame unit 610 and the lens 650 when they are mounted together, will not be transferred to the film layer 662, rather to the lens 650 itself via the frame groove 618 and the frame engaging surface 659. This prevents bubbles, waves and distortions being created in the film layer 662, as a result of separation of the film layer 662 from the optical surface 652 of the lens 650.
  • the gap 630 between the film layer side wall 666 and the clearance surface 614 is not apparent to the wearer of the optical article and will not impede the wearer's vision in any way. Such gap is also not visible to an onlooker and thus does not impair the aesthetic appearance of the glasses.
  • the gaps 630 may comprise a filler having a lower rigidity, i.e. being more easily deformable, than the film layers 662 and/or than the clearance surface 614, such that the filler will deform first before applying force and deformation to the film layer 662.
  • the entire film layer 662 is spaced from the lens mounting portion 612 by the gap 630. This spacing ensures that no forces will be transferred to the film surfaces 665a and 665b. Consequently, the above-described undesirable effects can be eliminated at those parts of the film surfaces 665a and 665b or any other part of the film layer 662.
  • the film layer 662 comprises a first film edge 668, which is an edge at which the respective first film surface 665a and the film layer side wall 666 meet. As shown in Fig. 6D, the first film edge 668 is spaced from the clearance surface 614 by the gap 630.
  • the first sub-portion 671a faces the clearance surface 614 and is spaced from the clearance surface 614 by the gap 630.
  • the gap 630 is defined by the clearance surface 614 and the first sub-portion 671a. Since the first sub-portion 671a is spaced from the clearance surface 614 by the gap 630, it would require great distortion or relative movement between the lens 650 and the frame unit 610 to bring the frame unit 610 into contact with the film layer side wall 666. Consequently, the chances of accidental force transfer between the frame unit 610 and the film layer 662 are reduced, and the above- described undesirable effects can be further eliminated.
  • the frame unit 610 comprise a first frame interior wall 619a, a first groove rim 619a' disposed between the first frame interior wall 619a and the frame groove 618, a second frame interior wall 619b, and a second groove rim 619b' disposed between the second frame interior wall 619a and the frame groove 618.
  • the lens 650 further comprises a first lens edge 653 at which the frame facing wall 658 and the first optical surface 652 meet, and a second lens edge 653' at which the frame facing wall 658 and the second optical surface 654 meet.
  • the first lens edge 653 is spaced from the second lens edge 653' by a lens edge thickness T3, and the first groove rim 6l9a' and the second groove rim 6l9b' are spaced from each other by a groove thickness T4.
  • the direction of curvature of the frame facing surface 660a' produced by the vertex 670 is convex, so as to deflect the first sub-portion 67 la with the film layer side wall 666 away from the frame unit 210, and to form the gap therebetween.
  • the frame groove 612 has dimensions which are larger than those of the lens between the first lens edge 653 and the second lens edge 653' together with the film layer side wall 668, and since the frame groove has an inclined shape, the gap 630 should be not visible to an onlooker and thus should not impair the aesthetic appearance of the optical article assembly.
  • an adhesive film layer may be adhered to the front side surface, the back side surface or both front and back side surfaces of the lens.
  • front side and back side, surface what is meant is the sides of the lens which are respectively further from and closer to the wearer when the optical article is worn.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Eyeglasses (AREA)
  • Lens Barrels (AREA)

Abstract

L'invention concerne un article optique devant être monté sur une unité de cadre comprenant une rainure de cadre, ledit article optique comprenant : une lentille ayant une première surface optique, une seconde surface optique opposée, et une paroi faisant face au cadre s'étendant entre les première et seconde surfaces optiques et ayant un apex configuré pour être reçu à l'intérieur de ladite rainure de cadre, ledit apex divisant ladite paroi faisant face au cadre en une première partie et une seconde partie ; et une couche de film comprenant une première surface de film collée à au moins une majorité de ladite première surface optique, une seconde surface de film opposée, et une paroi latérale de couche de film s'étendant entre la première surface et la seconde surface de film ; ladite première partie de la paroi faisant face au cadre et ladite paroi latérale de couche de film définissant ensemble une surface faisant face au cadre ayant au moins un vertex divisant la surface faisant face au cadre en au moins une première sous-partie s'étendant entre ledit vertex et la seconde surface de film et une seconde sous-partie s'étendant entre le vertex et l'apex.
PCT/IL2019/050588 2018-05-23 2019-05-23 Article optique WO2019224828A1 (fr)

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GB1808484.8A GB2574033A (en) 2018-05-23 2018-05-23 Optical article
GB1808484.8 2018-05-23

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WO2019224828A1 true WO2019224828A1 (fr) 2019-11-28

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JP2000047142A (ja) * 1998-07-31 2000-02-18 Asahi Optical Co Ltd 縁無し眼鏡のレンズ取付構造
FR2856620A1 (fr) * 2003-06-27 2004-12-31 Essilor Int Procede de percage d'une lentille ophtalmique et outil de polissage et/ou de doucissage pour la mise en oeuvre d'un tel procede
JP2006119382A (ja) * 2004-10-21 2006-05-11 Charmant Inc リムレス眼鏡のレンズ連結構造
JP2006178142A (ja) * 2004-12-22 2006-07-06 Vision Megane:Kk 眼鏡のレンズ取付け構造
US20060274266A1 (en) * 2004-06-04 2006-12-07 Steve Ogren Eyeglass connection system
DE102005041786A1 (de) * 2005-09-02 2007-03-08 Rodenstock Gmbh Glasbefestigung für starkgewölbte Kunststofffassungen
US20070195422A1 (en) * 2006-02-23 2007-08-23 Essilor International Polarizing optical element comprising a polarizing film and method for manufacturing such element
US20110037945A1 (en) * 2009-08-12 2011-02-17 Wiand Ronald C Beveling Wheel, Method for Forming a Beveled Lens for Use with Eyeglasses and a Beveled Lens
WO2012051810A1 (fr) * 2010-10-22 2012-04-26 Arts Optical Company Limited Dispositif de monture de lunettes adapté à des verres à diverses formes de bord
US20130095733A1 (en) * 2010-07-13 2013-04-18 Essilor International (Compagnie Generale D'optique) Method for trimming an ophthalmic eyeglass lens comprising a coating film
WO2015149251A1 (fr) * 2014-03-31 2015-10-08 Yin Sang Lam Lunettes à double lentille améliorées et leur procédé de fabrication
US20170192256A1 (en) * 2015-04-03 2017-07-06 Daicel-Evonik Ltd. Functional lens and functional eyeglasses provided with same

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JP5185288B2 (ja) * 2007-12-21 2013-04-17 パナソニック株式会社 電子メガネ用レンズの製造方法と電子メガネ用レンズおよび電子メガネ
TWI336691B (en) * 2008-02-15 2011-02-01 Cornerstone Optical Co Ltd Edge coated glass polarized lens
JP2015219488A (ja) * 2014-05-21 2015-12-07 株式会社タレックス 偏光眼鏡

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000047142A (ja) * 1998-07-31 2000-02-18 Asahi Optical Co Ltd 縁無し眼鏡のレンズ取付構造
FR2856620A1 (fr) * 2003-06-27 2004-12-31 Essilor Int Procede de percage d'une lentille ophtalmique et outil de polissage et/ou de doucissage pour la mise en oeuvre d'un tel procede
US20060274266A1 (en) * 2004-06-04 2006-12-07 Steve Ogren Eyeglass connection system
JP2006119382A (ja) * 2004-10-21 2006-05-11 Charmant Inc リムレス眼鏡のレンズ連結構造
JP2006178142A (ja) * 2004-12-22 2006-07-06 Vision Megane:Kk 眼鏡のレンズ取付け構造
DE102005041786A1 (de) * 2005-09-02 2007-03-08 Rodenstock Gmbh Glasbefestigung für starkgewölbte Kunststofffassungen
US20070195422A1 (en) * 2006-02-23 2007-08-23 Essilor International Polarizing optical element comprising a polarizing film and method for manufacturing such element
US20110037945A1 (en) * 2009-08-12 2011-02-17 Wiand Ronald C Beveling Wheel, Method for Forming a Beveled Lens for Use with Eyeglasses and a Beveled Lens
US20130095733A1 (en) * 2010-07-13 2013-04-18 Essilor International (Compagnie Generale D'optique) Method for trimming an ophthalmic eyeglass lens comprising a coating film
WO2012051810A1 (fr) * 2010-10-22 2012-04-26 Arts Optical Company Limited Dispositif de monture de lunettes adapté à des verres à diverses formes de bord
WO2015149251A1 (fr) * 2014-03-31 2015-10-08 Yin Sang Lam Lunettes à double lentille améliorées et leur procédé de fabrication
US20170192256A1 (en) * 2015-04-03 2017-07-06 Daicel-Evonik Ltd. Functional lens and functional eyeglasses provided with same

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GB2574033A (en) 2019-11-27

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