FR1095674A - Perfectionnements à la fabrication par coulée de lentilles à foyers multiples - Google Patents

Perfectionnements à la fabrication par coulée de lentilles à foyers multiples

Info

Publication number
FR1095674A
FR1095674A FR1095674DA FR1095674A FR 1095674 A FR1095674 A FR 1095674A FR 1095674D A FR1095674D A FR 1095674DA FR 1095674 A FR1095674 A FR 1095674A
Authority
FR
France
Prior art keywords
focal lens
lens casting
casting
focal
lens
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
Other languages
English (en)
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.)
PPG Industries Inc
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
Application granted granted Critical
Publication of FR1095674A publication Critical patent/FR1095674A/fr
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
    • B29D11/00028—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

  • Ophthalmology & Optometry (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Eyeglasses (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
FR1095674D 1953-01-23 1954-01-22 Perfectionnements à la fabrication par coulée de lentilles à foyers multiples Expired FR1095674A (fr)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
FR1095674A true FR1095674A (fr) 1955-06-06

Family

ID=21863118

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1095674D Expired FR1095674A (fr) 1953-01-23 1954-01-22 Perfectionnements à la fabrication par coulée de lentilles à foyers multiples

Country Status (5)

Country Link
BE (1) BE525925A (fr)
CH (1) CH321034A (fr)
FR (1) FR1095674A (fr)
GB (1) GB739341A (fr)
NL (2) NL184568C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1852401A1 (fr) * 2006-05-04 2007-11-07 Carl Zeiss AG Corps formé en verre ou vitrocéramique et son procédé de fabrication

Families Citing this family (5)

* 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 (fr) * 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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1852401A1 (fr) * 2006-05-04 2007-11-07 Carl Zeiss AG Corps formé en verre ou vitrocéramique et son procédé de fabrication
US7841212B2 (en) 2006-05-04 2010-11-30 Carl Zeiss Sports Optics Gmbh Method of providing a shaped body made of glass or glass ceramics

Also Published As

Publication number Publication date
NL184568C (nl)
NL85388C (fr)
CH321034A (de) 1957-04-30
GB739341A (en) 1955-10-26
BE525925A (fr)

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