GB731147A - An improved method of producing optical elements from plastic material - Google Patents

An improved method of producing optical elements from plastic material

Info

Publication number
GB731147A
GB731147A GB34796/53A GB3479653A GB731147A GB 731147 A GB731147 A GB 731147A GB 34796/53 A GB34796/53 A GB 34796/53A GB 3479653 A GB3479653 A GB 3479653A GB 731147 A GB731147 A GB 731147A
Authority
GB
United Kingdom
Prior art keywords
plastic material
optical elements
improved method
producing optical
condensation
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
GB34796/53A
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.)
L O S LENTILLES OPHTALMIQUES S
Original Assignee
L O S LENTILLES OPHTALMIQUES S
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 L O S LENTILLES OPHTALMIQUES S filed Critical L O S LENTILLES OPHTALMIQUES S
Publication of GB731147A publication Critical patent/GB731147A/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
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

A roughly-shaped optical element is prepared from thermoplastic material by polymerization or condensation in a mould, and the rough shape is formed into its final shape by pressing it between heated dies without further polymerization or condensation.
GB34796/53A 1952-12-18 1953-12-14 An improved method of producing optical elements from plastic material Expired GB731147A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR731147X 1952-12-18

Publications (1)

Publication Number Publication Date
GB731147A true GB731147A (en) 1955-06-01

Family

ID=9117109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34796/53A Expired GB731147A (en) 1952-12-18 1953-12-14 An improved method of producing optical elements from plastic material

Country Status (1)

Country Link
GB (1) GB731147A (en)

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