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WO1992005464A1 - Lunettes a lentilles et procede de fabrication - Google Patents

Lunettes a lentilles et procede de fabrication Download PDF

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Publication number
WO1992005464A1
WO1992005464A1 PCT/US1990/005465 US9005465W WO9205464A1 WO 1992005464 A1 WO1992005464 A1 WO 1992005464A1 US 9005465 W US9005465 W US 9005465W WO 9205464 A1 WO9205464 A1 WO 9205464A1
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WO
WIPO (PCT)
Prior art keywords
lens
curvature
lenticular
optical
concave
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US1990/005465
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English (en)
Inventor
Hector A. Dauvergne
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of WO1992005464A1 publication Critical patent/WO1992005464A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00932—Combined cutting and grinding thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D11/00—Producing optical elements, e.g. lenses or prisms
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00278—Lenticular sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00—Optical parts
    • G02C7/02—Lenses; Lens systems ; Methods of designing lenses

Definitions

  • This invention relates to prescription eyewear for users who have corrective prescriptions that cause eye glass lenses to be inordinately thick to accommodate the correction. While the use of lightweight plastics has provided some relief from the use of heavy plastic or glass lenses, the problem persists that many lenses for extreme visual correction are unusually thick resulting in an unattractive appearance. The thick appearance of a wearer's glasses can impact on the wearer's self image compounding the visual disability. Additionally, thick and heavy lenses can interfere with sports activities and other recreational activities where vision correction is needed.
  • the eyewear lens of this invention comprises a lenticular lens principally designed as a health aid or for recreational eyewear, particularly eyewear for vision correction where thickness and weight are primary considerations.
  • the geometric pattern selected for the lenses in the lens complex is based on aesthetic considerations since the appearance of the resulting eyewear is equally as important as its function. Constructing miniature lenses in an attractive pattern with a correct prescription curvature that can be imprinted on a naturally appearing lens substrate has presented substantial problems. The manufacture of a relatively inexpensive product that is available to individuals having different corrective prescriptions is also a problem. These problems have been overcome by the lenticular lens for corrective eyeglasses and the method of making the lens or lens segment for a two-piece lens as herein described.
  • the object of this invention is not to eliminate the use of conventional lenses with high corrections, but to create optional lightweight eyewear that is suitable for recreational use where sports activities or social situations make the optional eyewear desirable.
  • the proposed eyewear is not considered a substitute for prescription lenses, but is an auxiliary item that is preferably tinted and styled to provide an attractive appearance which reinforces the confidence of the wearer.
  • the lenticular eyewear lens of this invention is designed for use in recreational style glasses primarily for individuals who require severe visual correction.
  • the invented eyewear lens is a refractive lenticular lens that in one embodiment is comprised of a thin curved substrate of substantially uniform thickness, with a plurality of miniature lenses on preferably the inside or concave surface of the substrate.
  • Each miniature lens is more accurately a lentoid impression or lenticule, which forms a lens in conjunction with the opposite surface of the substrate.
  • the focal length of each "mini-lens" is dependent on the curvature of the mini-lens, the curvature of the opposite surface, and the refractive index of the particular material being used for the substrate or blank.
  • substrate is used in a general descriptive sense to define the structure on which the group of lenticules, or lenticular complex is formed.
  • mini-lenses are formed in a molding or stamping process when the lens blank is formed.
  • lens blank refers to the lens before its perimeter is shaped for installation in a suitable frame or coupled to a primary or base lens in certain of the alternate embodiments.
  • the resulting lens blank incorporates in its surface the lenticular complex.
  • the lenticulc.r complex is designed with an attractive pattern that masks the functional nature of the lenticular complex. This technique allows fabrication of a thin lens blank with a substantial correction that can be shaped to fit attractive eyeglasses ordinarily associated with recreational styles.
  • the lenticular lens blank does not form the primary lens of the glasses, but a central segment of the lens blank is used in conjunction with a primary lens to form a compound lens designed for extreme corrections of myopia.
  • the term "lens segment” refers to the central portion of the lens blank adapted for use in a two-piece, compound lens.
  • the lenticular lens blank is coupled to a shielding base lens to form a compound lens.
  • the shield lens has non-corrective front and back curvatures, except for extreme cases of myopia, wherein the shield lens has a corrective curvature that provides a cumulative correction to the underlying lenticular lens blank.
  • This two-piece, compound lens has a perimeter design that enables the edges of the lens to be coupled with a taper that enables convenient engagement with a conventional frame. The unique taper substantially eliminates the "stepped" facial profile resulting from the thick refractive edges of conventional lenses for high myopic correction.
  • the invented techniques for forming lenticular lenses are particularly adapted to design of lightweight lenses for severe myopia or hyperopia.
  • a conventional lens is formed with an extremely thick outer periphery and a thin center.
  • Such lenses are not only heavy but they cosmetically distort the wearer's natural eye features and are difficult to incorporate into a stylish frame.
  • sever correction of positive focus requires a lens with a thick center and a thin periphery which again is difficult to stylishly frame.
  • frames are constricted in size to accommodate the smaller diameter lenses, often required for severe hyperopia correction.
  • the multiple lentoid impressions on the substrate are preferably incorporated on the inner or concave surface such that the eyewear lens has a substantially natural outer appearance.
  • Each lentoid impression is of a diameter ranging, in general, between one hundred fifty thousandths and two hundred fifty thousandths or an inch, and each mini-lens formed is of substantially lesser dimension in thickness. Eyewear can therefore be fashioned having thin lenses that when tinted appear like conventional sunglasses.
  • the lenticular eyewear lens is fabricated utilizing a novel process that allows a particular focal correction to be incorporated in the lens or lens segment with a minimum expense.
  • the lens blank is formed in a mold or die in an injection or heat-stamp process. Since the mold and die are essentially of the same construction, the molding process is described herein and it is to be understood that the process can be applied to the equivalent process of heat stamping of suitable sheet material composed of methylmethacrylate polymer or other suitable polymer.
  • a mold is constructed with a first mold piece having a concave surface and a second, opposed mold piece having a complimentary convex surface.
  • the convex surface is substantially concentric with the concave surface to enable formation of a thin lens of uniform thickness without correction.
  • the mold surface may have different optical curvatures for more complex lens constructions.
  • One of the mold pieces preferably the piece with the convex surface, has an inset which is a bundle of individual parallel posts with a composite face that forms a mold surface matrix.
  • the surface imprints multiple individual lens structures or lenticules in a tight group or complex in the center of a molded lens blank.
  • the overall curvature of the discontinuous face of the inset is adjusted to be substantially the same as the curvature of the mold piece, such that the thickness of the resulting lens blank is substantially uniform, with local variations caused by the curvature of individual lenticules.
  • the inset Before being installed in the mold piece the inset has its face first ground and polished as a unit to an optical curvature that, with the curvature of the mold piece opposite the face of the inset, will produce the required correction for the material used in the blank.
  • the ground and polished composite face is then adjusted to conform to the curvature of the mold piece in which the inset is installed, with each post shifting relative to its neighbor.
  • the ground and polished face of each post retains its proper optical curvature to produce the desired correction in the molded lens, but forms a surface matrix that is no longer smooth, but discontinuous or stepped in arrangement. Since the imprint of each post will form an individual lens that is visible, the cross section of the posts is selected to provide a pattern that is attractive. It has been found that posts with a hexagonal cross section provide the attractive pattern desired.
  • the optical curvature of the two mold pieces remains the same with changes in the optical curvature of the inset effecting the optical changes necessary for changes in corrective prescriptions.
  • the inset is replaceable such that insets having different optical curvatures can be used in the same mold apparatus to produce different prescriptions in the lenses.
  • the space between the base lens and coupled lens segment is gas filled and the perimeter of the lens segment sealed to the base lens to entrap the gas and protect the discontinuous surface of the lenticular complex.
  • the lenticular lens and lenticular lens segment both have a central corrective lens portion encircled by the patterned lenticular complex.
  • the central corrective portion is substantially larger than the individual lenticules making up the lenticular complex.
  • the lens blank having the lenticular construction can be molded with an inside surface constructed with a fragmented mold on which a curvature equal to the curvature of the base lens is machined before displacement of the fragments to provide a taper to the perimeter while increasing the center thickness of the lens.
  • the increased center thickness allows for more extreme corrective curvatures to be applied to the central portion of the lenticular lens blank.
  • the lenticular complex proximate the wearer's nose may be eliminated as vision is partially obstructed by the nose.
  • the complex of lenticules is best situated at the templar segment of the lens for improved peripheral vision, an optimum pattern of lenticules only at the outer sides of the lenses has been found to be preferred.
  • FIG. 1 is a partial view of the lenticular lens mounted in an eye glass frame.
  • FIG. 2 is a back view of the lens blank from which the eye glass lens of FIG. 1 is formed.
  • FIG. 3 is an enlarged cross sectional view taken along the line 3-3 in FIG. 1.
  • FIG. 4 is a cross sectional schematic of the molding process for forming the lenticular lens.
  • FIG. 5 is a cross sectional schematic view of the mold inset utilized in FIG. 4.
  • FIG. 6 is a back view of a lenticular lens segment used in compound lenses.
  • FIG. 7 is a cross sectional view of the lens segment of FIG. 6 taken on the lines 7-7 in FIG. 6.
  • FIG. 8 is a cross sectional view of a compound lens.
  • FIG. 9 is a cross sectional view of an alternate embodiment of the compound lens.
  • FIG. 10 is a cross sectional view of a further embodiment of the compound lens.
  • FIG. 11 is a cross sectional view of a modified compound lens.
  • FIGS. 11a and lib are cross sectional views of alternate outer lenses useable in the compound lens structure of FIG. 11.
  • FIG. 12 is a top plan view of the lenticular lens blank useable in the compound lens assembly of FIG. 11.
  • FIG. 13 is a side view of three positioned pre- ground blocks used in formation of a three-block polycentric mold piece.
  • FIG. 14 is the post-ground and polished block assembly for the three-block mold piece.
  • FIG. 15 is a perspective view of the separated three fragments of the three-block mold piece of FIG. 14.
  • FIG. 16 is a side view of two pre-ground blocks used in formation of a two-block polycentric mold piece.
  • FIG. 17 is a side view of the p st-ground and polished block assembly for the two-block mold piece.
  • FIG. 18 is a perspective view of the separated two fragments of the two-block mold piece of FIG. 17.
  • FIG. 19 is a perspective view of the center plug for the mold pieces of FIGS. 15 and 18.
  • the lenticular eyewear lens designated generally by reference numeral 10 is mounted in a conventional recreational eyewear frame 12, shown in part in FIG. 1.
  • the lenticular lens 10 is shaped from a thin lens blank 14, preferably of lightweight plastic, that has been cast, injection molded or heat stamped with a lenticular structure 15 centrally positioned in the blank as shown in FIG. 2.
  • the blank is fabricated of polycarbonate which can be molded to a uniform thickness with an imprinted surface structure that comprises a plurality of individual lentoid impressions or lenticules 16 arranged into a particular lenticular complex 18 as shown in FIG. 2. While the lenticular structure 15 in the cross sectional view of FIG. 3 is exaggerated in scale and is shown projecting from the inside surface 20 of the lens 10, it may be substantially flush with the surface or slightly recessed thereto.
  • the miniature lenticules 16 forming the lenticular complex are arranged in a tight mosaic, as shown in FIG. 2.
  • the lenticules 16 are of hexagonal configuration and when grouped, webs 19 are formed between adjacent lenticules.
  • Each lenticule 16 cooperates with the curved outside surface 22 of the lens blank to form a miniature lens.
  • the corrective value of each lens depends on the curvature of the outside surface 22 of the blank, the curvature of a particular lenticule 16, and the refractive index of the material.
  • the center portion 17 of the lens blank 14 is substantially larger than a single hexagonal lenticule, having the same corrective curvature as any of the individual lenticules.
  • all of the lenticules 16 have the same curvature. More complex arrangements may be devised wherein the lenses formed by certain lenticules are of different corrective valves at different locations on the blank. These arrangements may be useful for construction of bifocals and trifocals.
  • the lens blank 14 for the lenticular eyewear lens 10 is preferably formed in a mold 24, as shown in FIG. 4.
  • the mold 24 has a first mold piece 26 with a ground and polished concave surface 28 and a second mold piece 30 with a complimentary ground and polished convex surface 32.
  • the concave and convex surfaces are in the simplest system concentric when the mold pieces are positioned close together when forming a thin lens blank of substantially uniform thickness.
  • the second mold piece 30 has an inset 34 installed in a circular opening 36 in the central portion of the mold piece 30.
  • the inset is constructed with a plurality of parallel posts 38 retained in a clamping collet 40.
  • the ends 42 of the posts 38 form a surface matrix 44 which imprints or impresses the lenticular structure 15 in the concave surface of lens blanks formed between the mold pieces when the mold piece are proximately positioned.
  • the plurality of posts 38 are bundled together in a group and retained as a unit 45 by a grinding collet 46.
  • the posts 38 have a flat base 48 which allows a relative position to be established among the posts 38 by aligning the post bases 48 on a flat surface 50.
  • the opposite ends 52 of the posts are then ground as a unit to the select optical curvature that with the outside curvature of the proposed lens blank would theoretically impart the correct focal length to a lens of a particular material of given refractive index having the two designated surface curvatures.
  • the bundled posts 38 are also ground as a unit with a perimeter shape, here cylindrical, to tightly fit as the inset in the opening 36 in the mold piece.
  • structural curvature to adjust to the inside design curvature of the prospective lens blank.
  • Structure curvature is used to define the effective or average curvature of the discontinuous surface of the inset face after the posts have been shifted. In a simple embodiment this is accomplished by loosening a plurality of set screws
  • the posts forming the center portion 17 are fused together before grinding and polishing to eliminate any trace of webs that might otherwise form.
  • the posts may be fused by brazing, soldering or bonding with epoxy or the like.
  • the size of the central portion 17 is desired to be as large as possible, but is limited by the severity of the curvature required to produce the desired correction.
  • the molding process was described for forming a lens blank having a lenticular structure that is formed in the surface of the eyewear the process is applicable to forming the lens segment for the compound lens.
  • a compound lens designated generally by the reference numeral 60 is constructed with a lens segment 62 that is coupled to a conventional corrective lens 64 as described with reference to FIGS. 6-10.
  • the lens segment 62 has been formed in a mold and trimmed from a lens blank having an original diameter as shown in dotted line.
  • the lens segment 62 can have a variety of different cross sections depending on the corrective strength to be obtained by the compound lens and the curvature of the concave surface 66 of the corrective lens 64 to which the lens segment is mated.
  • the compound lens is designed to correct for severe myopia by an eyewear lens that has a convex outer surface 68 instead of the customary flat surface.
  • the compound lens enables the corrective power of two lenses to be combined to achieve focal corrections in diopters of minus 10 to minus 22 or greater.
  • the lens segment 62 has one side 70 with or without optical curvature and an opposite side 74 with a conventional optical curvature. On the first side 70 the lens segment is formed with a ridge 76 around its perimeter. The lens segment has been trimmed from the full size blank as shown in dotted line in FIG. 6.
  • a lenticular complex 72 and a central portion 80 Inward of the perimeter ridge in most embodiments is a lenticular complex 72 and a central portion 80.
  • the lens segment 62 is mated to the concave surface 66 of the corrective lens 64 as shown in FIGS. 8, 9 and 10.
  • the perimeter ridge 76 is embedded in a groove 78 in the concave surface 66 of the corrective lens such that a sealed space 82 is formed between the two lenses which are fused together.
  • the advantage in corrective power is due entirely to the opposite sides 74 of the lens segment and the correction of the base lens 64.
  • the optical curvature of the concave surface 66 of the base lens 64 can be reduced in its radius as shown in FIGS. 9 and 10.
  • the 66 of the base lens 64 includes a stepped lenticular structure 84 as shown in FIGS. 7, 9 and 10.
  • the lenticular structure 84 is formed by the ends 42 of the posts 38 in the mold inset 34 in the process previously described.
  • the lenticular structure 84 comprises lenticules with a flat surface as shown for the lens segment of FIGS. 7 and
  • the corrective power of the lens segment 62 is developed entirely by the optical curvature of the opposite side 74.
  • the corrective power is then combined with the corrective power of the base lens 64 to produce the resultant corrective power of the compound lens.
  • the side 70 on which the lenticular structure 84 is incorporated in the surface is constructed of a concave center portion 86 with concave, stepped lenticules 88.
  • the concave center portion 86 and concave lenticules 88 combine with the concave surface of the opposite side 74 to increase the power of the lens segment 62.
  • the combined focal power of the lens segment and base lens determines the resultant power of the compound lens.
  • the base lens 64 has a concave surface 66 that if continued beyond the perimeter of the lens segment 62 would result in a thick outer portion 90 as shown in dotted line. Since the outer portion contributes little to corrected vision for severe myopics, the portion is trimmed in thickness as shown.
  • FIGS. 7-10 illustrate various embodiments of the lens segment and compound lens.
  • FIGS. 11-19 a further alternate embodiment of a compound lens assembly is shown together with certain components to facilitate fabrication.
  • the lens configurations are designed to correct for myopic vision up to the extreme case of minus 28. Certain of the curvatures in the figures shown are exaggerated to emphasize the design features that enable the extreme corrections to be achieved.
  • the compound lens assembly designated generally by the reference numeral 100 is shaped from lens blanks to the frame configuration mounted in a conventional eyeglass frame 102.
  • the lens assembly 100 includes an outer protective base lens 104 that provides a protective shield for an inner lenticular lens 106.
  • the lenticular lens 106 and base lens or shield lens 104 have mutual contacting surfaces 108 and 110 of identical optical curvature at their perimeter and are either cemented together or coupled by a perimeter gasket 109 which enables disassembly and substitution of different lenses in the lens assembly.
  • identical optical curvature of matching surfaces, it is to be understood that this is without regard to whether the curvature is negative, as in concave surfaces, or positive as in convex surfaces.
  • the advantage of the lens assembly 100 of FIG. 11 is that a high correction is achieved by a compound lens structure with a tapered compound outer perimeter 112 that appears like a conventional sunglass lens or low correction prescription lens.
  • This unique construction is obtained by the use of a polycentric inside surface 114 of the lenticular lens 106 that has the same radius of curvature as the outside surface 116 of the base lens.
  • a polycentric surface configuration of identical curvature there is no effective correction in the perimeter portion
  • the base lens 104 is without correction having the same curvature on the outside and inside surface which may be in the range of 4 to 6 for acceptable external appearance.
  • the inner lenticular lens 106 has a central piano surface 118 with a series of stepped piano lenticules 120 adjacent thereto on one portion of the lens. Preferably these surfaces are piano for myopic correction, but such surfaces may be concave or convex as noted with reference to FIGS. 6-10. Because a lens may be required to have a minimum thickness for protection of the eye of the wearer, the structure of the lens is in part dictated by the thinnest area of the lens which for myopic vision is at the center 122.
  • the curvature shown for a minus 20 correction is approximately at its maximum for the position of the reference eye 126, relative to the corrective curvature 124.
  • the approximate corrections shown by the dotted lines and correction range designation of minus 20 to minus 7 in FIG. 11 are for a lens having an opposite piano surface 118.
  • the piano lenticules 120 provide an increased "glance angle" that extends the effective corrective area for the compound lens assembly shown by the broken radial lines in FIG. 11.
  • the lens assembly includes a silicone gasket 109 that can be removed to separate the base lens 104 from the lenticular lens 106.
  • the outer base lens 104 shown standing alone in FIG. 11a which was incorporated in the lens assembly of FIG. 11 can be replaced by a corrective base lens 128 as shown in FIG. lib.
  • the corrective base lens 128 has a central portion 130 having a corrective optical curvature that can be varied as shown in dotted line to provide a correction that combines with the correction in the lenticular lens 106 to provide the total cumulative correction desired.
  • the top surface of the lenticular lens can include a corrective surface instead of the piano surface shown in FIG.
  • the top surface 119 and the lenticules 120 be piano for ease of standardization in fabrication.
  • the steps 132 of the lenticules can be angled to minimize interference with the vision.
  • the angle of the step may be adjusted such that accommodation for the movement of the eye is taken into account during side glance. Therefore, the angle may not be accurately radially aligned with the pupil in its straight view position as shown in FIG. 11.
  • FIG. 12 a top view of a slightly modified lenticular lens blank 134 is shown.
  • the modified lenticular lens blank 134 is virtually identical to the lenticular lens 106 of the FIG. 11 assembly, where the lens 106 was formed from a similar lens blank with the exception of the three part polycentric surface 114.
  • the three part polycentric surface of the lenticular lens 106 of FIG. 11 is formed from a three-part mold with a center plug as shown in FIGS. 13-15.
  • the lens blank of FIG. 12 is formed by a two-part mold piece with a similar center plug as shown in FIGS. 16-18.
  • the three-part mold piece collectively identified as by the reference numeral 136 in FIG. 14 is formed by three blocks 138 and 140 in which two of the blocks 138 are displaced on a mandrel while the tops of the three blocks are milled and polished to the appropriate curvature shown in dotted line in FIG. 13.
  • the blocks are dropped in place as shown in FIG. 14 with a center hole 142 drilled to fit a center plug 144 as shown in FIG. 19.
  • the center plug 144 has an orifice 146 for injection of plastic when the three- piece mold together with the center plug, is used as one of the two mold pieces in an injection molding device of the type shown previously in FIG. 4. Because of the simpler lenticular outer surface 108 of the lenticular lens 106 of FIG. 11, the opposing mold device (not shown) can be of simpler construction than that shown in FIG. 4 with only the center piano portion 148 as shown in FIG. 12 being formed by moveable mold members that are equivalent to the parallel posts 38 as shown in the mold embodiment of FIG. 4.
  • FIGS. 16-18 a similar construction of a two-part mold piece 150 is shown utilizing two blocks 152 and 154 which are canted when the desired curvature is applied by milling and polishing.
  • the blocks are repositioned as shown in the side view of FIG. 17 to provide a lenticular lens blank that will have added material in the center of the blank available for imparting the primary correction curvature.
  • the center plug 144 is designed with a curved top 156 to impart the general central curvature 124 before the actual corrective curvature is ground and polished by conventional means.
  • a common juncture line or fold appears in the underside surface 160 as shown by dotted line 158 in FIG. 12. Although the surface has the same radius of curvature, each of the two parts of the surface has a different center.
  • each of the three segments of the formed lens surface has the same optical curvature, but with a displaced center.
  • an added perpendicular fold 164 visible in FIG. 11, is imparted.
  • the optical curvature of the underside surface segments 160 is the same as the optical curvature of the perimeter of the upper side surface 108 which in turn is identical to the underside surface 110 of the coupled base lens 104 at its perimeter, which in turn is the same as the outside surface 116 of the base lens 104.
  • optical distortion around the perimeter of the lens assembly does not occur. Effectively there is no overall optical correction in this portion of the lens assembly and the "stepped" appearance of the wearer's temples from a facing viewer is avoided. Therefore, the objective of adding thickness to the center of the lens for use in optical correction is achieved without unattractive perimeter distortion.
  • a central corrective portion 124 in the lenticular lens 106 or 134 is matched with piano top surface 118 and stepped piano lenticules 120.
  • the particular stepped pattern as shown in FIG. 12 has been found to be preferred, both for improving the field of the wearer's vision and for the aesthetic appearance of the resultant lens assembly 100.
  • the lens assembly preferably has a tinted outer base lens such that the complex underlying lenticular lens 106 is somewhat masked to provide a conventional appearance to a wearer's glasses formed with the invented lens assembly.
  • the base lens 104 and lenticular lens 106 can be coupled with a clear cement around the outer periphery sealing dry air or other suitable gas in the space between piano top surface and lenticules of the lenticular lens, and the undersurface of the base lens.
  • the means shown provide a reasonable compromise between vision correction and overall appearance of the resulting lens assembly 100.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ophthalmology & Optometry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)

Abstract

Lentille pour lunette (10) et son procédé de fabrication. La lentille (10) possède un substrat (22) courbé présentant une pluralité d'impressions lentiformes (16) formées de préférence sur la surface interne du substrat (22) au moyen d'un moule (24) qui comprend des parties opposées et courbées, une des parties du moule ayant une pièce d'insertion (34) avec des éléments coulissants parallèles formant une face composite à laquelle on donne, par meulage, une première courbure prédéterminée de la partie du moule opposée afin d'imprimer sur les ébauches de lentilles minces de multiples impressions lentiformes (16) pour produire des lunettes légères et convenant aux loisirs.
PCT/US1990/005465 1990-09-24 1990-09-26 Lunettes a lentilles et procede de fabrication Ceased WO1992005464A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US58669990A 1990-09-24 1990-09-24
US586,699 1990-09-24

Publications (1)

Publication Number Publication Date
WO1992005464A1 true WO1992005464A1 (fr) 1992-04-02

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PCT/US1990/005465 Ceased WO1992005464A1 (fr) 1990-09-24 1990-09-26 Lunettes a lentilles et procede de fabrication

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WO (1) WO1992005464A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6890074B2 (en) * 2003-02-26 2005-05-10 Combex, Ltd. Spectacles with lenses
DE102017003224A1 (de) * 2016-09-06 2018-03-08 Schneider Gmbh & Co. Kg Anordnung und Verfahren zum Halten eines optischen Werkstücks sowie optisches Werkstück und Brille
CN114859444A (zh) * 2022-05-06 2022-08-05 西安交通大学 一种硫系玻璃红外复眼的制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195145A (en) * 1964-06-10 1965-07-13 William Smith Dr Spectacle lens system having protective major lens and detachable posterior corrective lens
US3628854A (en) * 1969-12-08 1971-12-21 Optical Sciences Group Inc Flexible fresnel refracting membrane adhered to ophthalmic lens
US3744882A (en) * 1971-08-20 1973-07-10 Holograph Corp Composite lens for an optical communication system providing directly viewed real images

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195145A (en) * 1964-06-10 1965-07-13 William Smith Dr Spectacle lens system having protective major lens and detachable posterior corrective lens
US3628854A (en) * 1969-12-08 1971-12-21 Optical Sciences Group Inc Flexible fresnel refracting membrane adhered to ophthalmic lens
US3744882A (en) * 1971-08-20 1973-07-10 Holograph Corp Composite lens for an optical communication system providing directly viewed real images

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6890074B2 (en) * 2003-02-26 2005-05-10 Combex, Ltd. Spectacles with lenses
US7011409B2 (en) 2003-02-26 2006-03-14 Combex, Ltd. Method of manufacturing spectacles with lenses
DE102017003224A1 (de) * 2016-09-06 2018-03-08 Schneider Gmbh & Co. Kg Anordnung und Verfahren zum Halten eines optischen Werkstücks sowie optisches Werkstück und Brille
CN114859444A (zh) * 2022-05-06 2022-08-05 西安交通大学 一种硫系玻璃红外复眼的制备方法
CN114859444B (zh) * 2022-05-06 2024-03-19 西安交通大学 一种硫系玻璃红外复眼的制备方法

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