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CH321034A - Method and device for producing lenses with at least two focal lengths - Google Patents

Method and device for producing lenses with at least two focal lengths

Info

Publication number
CH321034A
CH321034A CH321034DA CH321034A CH 321034 A CH321034 A CH 321034A CH 321034D A CH321034D A CH 321034DA CH 321034 A CH321034 A CH 321034A
Authority
CH
Switzerland
Prior art keywords
focal lengths
producing lenses
lenses
producing
focal
Prior art date
Application number
Other languages
German (de)
Inventor
W Poundstone William
Original Assignee
Pittsburgh Plate Glass Co
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 Pittsburgh Plate Glass Co filed Critical Pittsburgh Plate Glass Co
Publication of CH321034A publication Critical patent/CH321034A/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
    • B29D11/00009—Production of simple or compound lenses
    • B29D11/00028—Bifocal lenses; Multifocal lenses
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/20—Uniting glass pieces by fusing without substantial reshaping
    • C03B23/22—Uniting glass lenses, e.g. forming bifocal lenses
    • 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
    • G02C7/06—Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ophthalmology & Optometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Eyeglasses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
CH321034D 1953-01-23 1954-01-21 Method and device for producing lenses with at least two focal lengths CH321034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US321034XA 1953-01-23 1953-01-23

Publications (1)

Publication Number Publication Date
CH321034A true CH321034A (en) 1957-04-30

Family

ID=21863118

Family Applications (1)

Application Number Title Priority Date Filing Date
CH321034D CH321034A (en) 1953-01-23 1954-01-21 Method and device for producing lenses with at least two focal lengths

Country Status (5)

Country Link
BE (1) BE525925A (en)
CH (1) CH321034A (en)
FR (1) FR1095674A (en)
GB (1) GB739341A (en)
NL (2) NL85388C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149948A (en) * 1957-10-07 1964-09-22 Pittsburgh Plate Glass Co Method for forming multifocal lens blanks
NL247751A (en) * 1959-01-26
US3130028A (en) * 1959-05-26 1964-04-21 Pittsburgh Plate Glass Co Glass feeding
US3130029A (en) * 1959-06-23 1964-04-21 Bausch & Lomb Method for making fused multifocal lenses
GB990483A (en) * 1962-07-04 1965-04-28 Pilkington Brothers Ltd Improvements in or relating to the pressure moulding of articles
DE102006020991B4 (en) * 2006-05-04 2009-09-10 Carl Zeiss Ag Process for producing a shaped body of glass or glass ceramic

Also Published As

Publication number Publication date
FR1095674A (en) 1955-06-06
BE525925A (en)
NL184568C (en)
GB739341A (en) 1955-10-26
NL85388C (en)

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