FR662879A - Bifocal optical glass and method of manufacturing this glass - Google Patents

Bifocal optical glass and method of manufacturing this glass

Info

Publication number
FR662879A
FR662879A FR662879DA FR662879A FR 662879 A FR662879 A FR 662879A FR 662879D A FR662879D A FR 662879DA FR 662879 A FR662879 A FR 662879A
Authority
FR
France
Prior art keywords
glass
manufacturing
bifocal optical
optical glass
bifocal
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
French (fr)
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.)
EMIL BUSCH AG
Original Assignee
EMIL BUSCH AG
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 EMIL BUSCH AG filed Critical EMIL BUSCH AG
Application granted granted Critical
Publication of FR662879A publication Critical patent/FR662879A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Ophthalmology & Optometry (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
FR662879D 1927-10-25 1928-10-24 Bifocal optical glass and method of manufacturing this glass Expired FR662879A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE662879X 1927-10-25

Publications (1)

Publication Number Publication Date
FR662879A true FR662879A (en) 1929-08-13

Family

ID=6589165

Family Applications (1)

Application Number Title Priority Date Filing Date
FR662879D Expired FR662879A (en) 1927-10-25 1928-10-24 Bifocal optical glass and method of manufacturing this glass

Country Status (1)

Country Link
FR (1) FR662879A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597055A (en) * 1969-01-28 1971-08-03 Charles W Neefe Monocentric bifocal contact lens
FR2420438A1 (en) * 1978-03-24 1979-10-19 Becker Paul STAINED GLASS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3597055A (en) * 1969-01-28 1971-08-03 Charles W Neefe Monocentric bifocal contact lens
FR2420438A1 (en) * 1978-03-24 1979-10-19 Becker Paul STAINED GLASS

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