NL7105234A - Synthetic plastic correction lenses - Google Patents

Synthetic plastic correction lenses

Info

Publication number
NL7105234A
NL7105234A NL7105234A NL7105234A NL7105234A NL 7105234 A NL7105234 A NL 7105234A NL 7105234 A NL7105234 A NL 7105234A NL 7105234 A NL7105234 A NL 7105234A NL 7105234 A NL7105234 A NL 7105234A
Authority
NL
Netherlands
Prior art keywords
lenses
polarising
pref
mould
correction
Prior art date
Application number
NL7105234A
Other versions
NL171679C (en
NL171679B (en
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 filed Critical
Priority to NL7105234A priority Critical patent/NL171679C/en
Publication of NL7105234A publication Critical patent/NL7105234A/en
Publication of NL171679B publication Critical patent/NL171679B/en
Application granted granted Critical
Publication of NL171679C publication Critical patent/NL171679C/en

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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • G02B1/041—Lenses

Landscapes

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

Abstract

Polarising correction lenses are mfd. by placing polarising element in a mould, injecting a synthetic monomer on each side of the element, polymerising the monomer and extracting the composite lens from the mould. The polarising element is pref. formed from a transparent sheet of polyvinyl alcohol contg. a proportion of oriented molecules of dehydrated alcohol, opt. polyvinyl butyral or mixts. are used. The outer elements are moulded from methyl methacrylate or cellulose derivs., pref. cellulose acetobutyrate. A polyvinyl alcohol adhesive is used to cement the layers. Thermosetting monomers such as diethylene glycol bis-allyl carbonate are used for the outer layers. The faces of the lenses are concave and convex respectively and are ground and polished to an exact configuration. Plastic lenses are mass produced by moulding and used as such without finishing, or correction by grinding and polishing.
NL7105234A 1971-04-19 1971-04-19 COMPOSITE PLASTIC EYE LENS CONTAINING A POLARIZING SHEET. NL171679C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7105234A NL171679C (en) 1971-04-19 1971-04-19 COMPOSITE PLASTIC EYE LENS CONTAINING A POLARIZING SHEET.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7105234A NL171679C (en) 1971-04-19 1971-04-19 COMPOSITE PLASTIC EYE LENS CONTAINING A POLARIZING SHEET.

Publications (3)

Publication Number Publication Date
NL7105234A true NL7105234A (en) 1972-10-23
NL171679B NL171679B (en) 1982-12-01
NL171679C NL171679C (en) 1983-05-02

Family

ID=19812948

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7105234A NL171679C (en) 1971-04-19 1971-04-19 COMPOSITE PLASTIC EYE LENS CONTAINING A POLARIZING SHEET.

Country Status (1)

Country Link
NL (1) NL171679C (en)

Also Published As

Publication number Publication date
NL171679C (en) 1983-05-02
NL171679B (en) 1982-12-01

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Legal Events

Date Code Title Description
BB A search report has been drawn up
BC A request for examination has been filed
V1 Lapsed because of non-payment of the annual fee