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GB798877A - Improvements in or relating to lenses - Google Patents

Improvements in or relating to lenses

Info

Publication number
GB798877A
GB798877A GB1171756A GB1171756A GB798877A GB 798877 A GB798877 A GB 798877A GB 1171756 A GB1171756 A GB 1171756A GB 1171756 A GB1171756 A GB 1171756A GB 798877 A GB798877 A GB 798877A
Authority
GB
United Kingdom
Prior art keywords
sheet
lenses
lens
transparent
secured
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
GB1171756A
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.)
MICHAEL HENRY BIRCH
Original Assignee
MICHAEL HENRY BIRCH
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 MICHAEL HENRY BIRCH filed Critical MICHAEL HENRY BIRCH
Priority to GB1171756A priority Critical patent/GB798877A/en
Publication of GB798877A publication Critical patent/GB798877A/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
    • B29D11/00932—Combined cutting and grinding thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ophthalmology & Optometry (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Eyeglasses (AREA)

Abstract

798,877. Lenses. BIRCH, M. H. Oct. 9, 1956 [April 17, 1956], No. 11717/56. Class 97(1) [Also in Group XXIII] A plastic lens blank having preformed refractory surfaces has at least one of the said surfaces at least partially covered by a sheet of flexible material secured thereto by adhesive so that the sheet is capable of being removed without damaging the refractory surface. The sheet or sheets may be transparent and may completely cover the surfaces. As shown a spectacle lens blank 11 has secured thereto a transparent adhesive sheet 12 marked at 13 with the outline shape 13 of the focal lens and having marks 14, 15 indicating the position of the optical and geometrical centres and the horizontal axis 16 and cylindrical axis 17 of the lens. The markings assist the edging operation to protect the lenses during the final setting up, polishing and wiping of the mounts.
GB1171756A 1956-04-17 1956-04-17 Improvements in or relating to lenses Expired GB798877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1171756A GB798877A (en) 1956-04-17 1956-04-17 Improvements in or relating to lenses

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1171756A GB798877A (en) 1956-04-17 1956-04-17 Improvements in or relating to lenses

Publications (1)

Publication Number Publication Date
GB798877A true GB798877A (en) 1958-07-30

Family

ID=9991394

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1171756A Expired GB798877A (en) 1956-04-17 1956-04-17 Improvements in or relating to lenses

Country Status (1)

Country Link
GB (1) GB798877A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985005317A1 (en) * 1984-05-24 1985-12-05 University Of Strathclyde Coating material for lenses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985005317A1 (en) * 1984-05-24 1985-12-05 University Of Strathclyde Coating material for lenses

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