GB585580A - Improvements in the manufacture of lenses from plastic materials - Google Patents

Improvements in the manufacture of lenses from plastic materials

Info

Publication number
GB585580A
GB585580A GB1956443A GB1956443A GB585580A GB 585580 A GB585580 A GB 585580A GB 1956443 A GB1956443 A GB 1956443A GB 1956443 A GB1956443 A GB 1956443A GB 585580 A GB585580 A GB 585580A
Authority
GB
United Kingdom
Prior art keywords
core
monomer
coated
polymers
film
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.)
Expired
Application number
GB1956443A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1956443A priority Critical patent/GB585580A/en
Publication of GB585580A publication Critical patent/GB585580A/en
Expired legal-status Critical Current

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
    • B29D11/0073—Optical laminates
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)

Abstract

A solid transparent core of thermoplastic material, and of form and dimensions closely approaching those of the desired finished lens, is coated with a liquid or semi-liquid film of transparent thermoplastic material or of transparent thermosetting abrasion - resisting material, and the coated core is moulded in dies having optically-accurate surfaces. Thus, a core of methyl methacrylate polymer or polystyrene may be coated with (a) methyl methacrylate monomer, (b) allyl methacrylate monomer or (c) abrasion-resistant material in the form of cross-linked polymers such as polymers of esters of allyl alcohol or its derivatives, e.g. polymers of allyl methacrylate, chloracrylate or crotonate, diallyl oxalate or phthalate, or glycol dimethacrylate. The film may be applied by dipping or spraying, and as a monomer or a solution of polymer in monomer or in a volatile solvent. The monomers are polymerized during the moulding. The film may, or may not, have the same refractive index as that of the core. According to the first Provisional Specification, the core may be of thermosetting material.ALSO:A solid transparent core of thermoplastic material, and of form and dimensions closely approaching those of the desired finished lens, is coated with a liquid or semi-liquid film of transparent thermoplastic material or of transparent thermosetting abrasion-resisting material, and the coated core is moulded in dies having optically-accurate surfaces. Thus, a core of methyl methacrylate polymer or polystyrene may be coated with (a) methyl methacrylate monomer, (b) allyl methacrylate monomer or (c) abrasion-resistant material in the form of cross-linked polymers such as polymers of esters of allyl alcohol or its derivatives, e.g., polymers of allyl methacrylate, chloracrylate or crotonate, diallyl oxalate or phthalate or glycol dimethacrylate. The film may be applied by dipping or spraying, and as a monomer or a solution of polymer in monomer or in a volatile solvent. The monomers are polymerized during the moulding. The film may or may not have the same refractive index as that of the core. The core may be formed by machining, grinding and polishing, or by moulding. Specifications 482,836, 556,743, 572,748, 583,091 and 585,576, are referred to. According to the first Provisional Specification, the core may be of thermosetting material.
GB1956443A 1943-11-23 1943-11-23 Improvements in the manufacture of lenses from plastic materials Expired GB585580A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1956443A GB585580A (en) 1943-11-23 1943-11-23 Improvements in the manufacture of lenses from plastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1956443A GB585580A (en) 1943-11-23 1943-11-23 Improvements in the manufacture of lenses from plastic materials

Publications (1)

Publication Number Publication Date
GB585580A true GB585580A (en) 1947-02-12

Family

ID=10131483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1956443A Expired GB585580A (en) 1943-11-23 1943-11-23 Improvements in the manufacture of lenses from plastic materials

Country Status (1)

Country Link
GB (1) GB585580A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113549174A (en) * 2021-04-06 2021-10-26 富螺(上海)医疗器械有限公司 Polymer, method for producing polymer, and intraocular lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113549174A (en) * 2021-04-06 2021-10-26 富螺(上海)医疗器械有限公司 Polymer, method for producing polymer, and intraocular lens
CN113549174B (en) * 2021-04-06 2023-06-23 上海富吉医疗科技有限公司 Polymer, method for producing polymer, and intraocular lens

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