WO1992006399A1 - Verre de lunettes et procede de fabrication correspondant - Google Patents

Verre de lunettes et procede de fabrication correspondant Download PDF

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Publication number
WO1992006399A1
WO1992006399A1 PCT/JP1991/001300 JP9101300W WO9206399A1 WO 1992006399 A1 WO1992006399 A1 WO 1992006399A1 JP 9101300 W JP9101300 W JP 9101300W WO 9206399 A1 WO9206399 A1 WO 9206399A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
concave
eye
objective
finished
Prior art date
Application number
PCT/JP1991/001300
Other languages
English (en)
Japanese (ja)
Inventor
Yuyoshi Saito
Original Assignee
Asahi Lite Optical Co., 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 Asahi Lite Optical Co., Ltd. filed Critical Asahi Lite Optical Co., Ltd.
Publication of WO1992006399A1 publication Critical patent/WO1992006399A1/fr

Links

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
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/0048—Moulds for lenses
    • B29D11/00528—Consisting of two mould halves joined by an annular gasket
    • 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
    • B29D11/00413—Production of simple or compound lenses made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
    • 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
    • B29D11/0048—Moulds for lenses
    • B29D11/00538—Feeding arrangements
    • 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

  • the present invention relates to a spectacle lens for correcting vision of strong myopia and a method of manufacturing the same.
  • the purpose of the present invention is to solve the above-mentioned problems of the conventional lens, to eliminate optical aberration, to provide a practical field of view, and to reduce the weight of the lens. Is the place to provide.
  • the objective is to make the objective surface a concave aspheric surface and to reduce various aberrations specific to a lens for correcting myopia with strong myopia. Achieved more.
  • the inventor repeated various trial productions and studied the optical aberration, the thickness of the lens, the appearance, and the like.
  • the objective surface of the lens has a radius of curvature of 594R ⁇ : L48. It has been found that 5R is preferred, and particularly, 2977R to 198R is optimal. However, the radius of curvature is not limited to the above when the use conditions, lens size, and the like are other than the normal use.
  • the refractive index and Abbe number specific to the material used for the lens are also involved in solving the above problems, the material must have a large refractive index and a large Abbe number. Is advantageous.
  • the feature of the present invention resides in that a concave aspheric surface is formed on the objective surface of the lens, thereby increasing the concave radius of curvature of the eye surface. It is advantageous in that it is sharp.
  • the refractive power of the lens is D
  • the refractive power on the object side is D ⁇
  • the refractive power on the eye side is D.
  • D 2 (1-d) xi 00 / r 2
  • N d is the refractive index of the lens material
  • R Is the radius of curvature (mm) on each surface.
  • the material may be a highly transparent material such as glass or resin, and the refractive index and Abbe number are not particularly limited.
  • the lens objective surface By using a concave aspherical surface for the lens objective surface, it is possible to improve optical aberrations, and also to increase the radius of curvature of the eye surface by using force. This allows for a wider field of view, and, when attached to a spectacle frame, reduces the lens thickness at the part in contact with the frame, improving the appearance and improving the appearance. The weight of the lens can be significantly reduced.
  • FIG. 1 is an exploded perspective view of a semi-finished eyeglass lens according to the present invention.
  • FIG. 2 is a cross-sectional view of a state in which the molds of FIG. 1 are combined
  • FIG. 3 is a perspective view of an example of the eyeglass semi-finished lens of the present invention
  • FIG. 5 is a cross-sectional view of an eyeglass lens according to an example of the present invention and a comparative example.
  • the first embodiment relates to a method of manufacturing a vision correction lens using a urethane-based thermosetting resin as a material.
  • a glass mold 1 and a glass mold 2 are fitted into a gasket 3 to form a casting shell 4 (FIG. 2).
  • a semi-finished lens 6 having an objective surface 7 and an eye surface 8 was obtained (Fig. 3).
  • the glass mold 1 forms an object surface of the semi-finished lens.
  • a glass type 1 having a sectional shape of a to e in FIG. 4 was used.
  • the curved surfaces on the right side of the glass types a to e are surfaces that come into contact with the raw material during molding.
  • the right curved surface of a forms a concave aspheric surface on one side of the semi-finished lens
  • b is spherical concave
  • c is flat
  • d is spherical convex
  • e is aspheric Forming convex and respective surfaces.
  • the glass mold 2 and the gasket 3 that form the opposite surfaces of the five types of semi-finished lens 6 have a lens frequency of 13D, which is the same as that of the semi-finished lens 6.
  • Table 1 shows the evaluation of the optical aberrations and lens shapes of these lenses.
  • the raw material used in this example has a refractive index of 1.60, an Abbe number of 36, and a specific gravity of 1.34.
  • the same raw materials were used in the same manner as in the first embodiment to make glass type a to e.
  • the glass type 2 is set so that the lens frequency is 13D.
  • These glass-type lenses 1 and 2 formed a lens for correcting myopia with a concave objective surface, with a lens center thickness of 1, 5 and an effective lens diameter of 70 ma.
  • the lens obtained in this way has the same shape as the lens of Example 1 in which the opposing surface is spherically polished.
  • the evaluation is the same as in Example 1, and this is shown in Table 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (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)
  • Lenses (AREA)

Abstract

Afin de réduire les diverses aberrations intrinsèques à un verre de lunettes pour la correction de la vue chez des personnes atteintes de myopie grave, on façonne un substrat de verre objectif avec une surface concave et non sphérique. Puis, on façonne un substrat de verre oculaire avec une surface non polie destinée à être ensuite polie jusqu'à présenter une forme concave, pour qu'un verre fini puisse être produit. Dans une variante, on façonne le substrat de verre oculaire avec une forme concave en le moulant en suivant la forme du substrat de verre objectif, pour qu'un verre fini puisse être produit.
PCT/JP1991/001300 1990-10-03 1991-09-27 Verre de lunettes et procede de fabrication correspondant WO1992006399A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP26737890A JPH04218016A (ja) 1990-10-03 1990-10-03 眼鏡用レンズ及びその製法
JP2/267378 1990-10-03

Publications (1)

Publication Number Publication Date
WO1992006399A1 true WO1992006399A1 (fr) 1992-04-16

Family

ID=17444009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1991/001300 WO1992006399A1 (fr) 1990-10-03 1991-09-27 Verre de lunettes et procede de fabrication correspondant

Country Status (2)

Country Link
JP (1) JPH04218016A (fr)
WO (1) WO1992006399A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006057015A1 (fr) * 2004-11-29 2006-06-01 SAFILO SOCIETÀ AZIONARIA FABBRICA ITALIANA LAVORAZIONE OCCHIALI S.p.A. Verre ameliore pour lunettes et lunettes dotees du verre

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2837419B1 (fr) * 2002-03-19 2006-11-24 Essilor Int Procede pour l'obtention d'une lentille optique ainsi que joint et dispositif pour sa mise en oeuvre
CN114830014B (zh) * 2020-01-27 2024-05-10 豪雅镜片泰国有限公司 眼镜镜片、眼镜镜片的设计方法、以及眼镜镜片的制造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5628828A (en) * 1979-05-11 1981-03-23 Sola Prod Method of injecting lens into mold and gasket device for injecting lens into mold
JPS5941164B2 (ja) * 1978-10-24 1984-10-05 エシロ−ル アンテルナシヨナル コムパニ− ジエネラル ドプテイク 眼鏡レンズ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5941164B2 (ja) * 1978-10-24 1984-10-05 エシロ−ル アンテルナシヨナル コムパニ− ジエネラル ドプテイク 眼鏡レンズ
JPS5628828A (en) * 1979-05-11 1981-03-23 Sola Prod Method of injecting lens into mold and gasket device for injecting lens into mold

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006057015A1 (fr) * 2004-11-29 2006-06-01 SAFILO SOCIETÀ AZIONARIA FABBRICA ITALIANA LAVORAZIONE OCCHIALI S.p.A. Verre ameliore pour lunettes et lunettes dotees du verre
US7553016B2 (en) 2004-11-29 2009-06-30 Safilo Societa Azionaria Fabbrica Italiana Lavorazione Occhiali S.P.A. Lens for spectacles and spectacles comprising the lens

Also Published As

Publication number Publication date
JPH04218016A (ja) 1992-08-07

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