GB1396059A - Method of producing photochromic multifocal spectacle lenses - Google Patents

Method of producing photochromic multifocal spectacle lenses

Info

Publication number
GB1396059A
GB1396059A GB1817473A GB1817473A GB1396059A GB 1396059 A GB1396059 A GB 1396059A GB 1817473 A GB1817473 A GB 1817473A GB 1817473 A GB1817473 A GB 1817473A GB 1396059 A GB1396059 A GB 1396059A
Authority
GB
United Kingdom
Prior art keywords
glass
segment
photochromic
reading
fusing
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
GB1817473A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss 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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB1396059A publication Critical patent/GB1396059A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00Re-forming shaped glass
    • C03B23/20Uniting glass pieces by fusing without substantial reshaping
    • C03B23/22Uniting glass lenses, e.g. forming bifocal lenses
    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/02Lenses; Lens systems ; Methods of designing lenses
    • G02C7/06Lenses; Lens systems ; Methods of designing lenses bifocal; multifocal ; progressive
    • GPHYSICS
    • G02OPTICS
    • G02CSPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
    • G02C7/00Optical parts
    • G02C7/10Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
    • G02C7/102Photochromic filters

Landscapes

  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Ophthalmology & Optometry (AREA)
  • Optics & Photonics (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Eyeglasses (AREA)
  • Glass Compositions (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

1396059 Multifocal glass lenses CARL ZEISS-STIFTUNG [trading as CARL ZEISS] 16 April 1973 [2 May 1972] 18174/73 Heading C1M [Also in Division G2] In the manufacture of a fused multifocal lens of photochromic glass, a reading glass segment 2, Fig. 9 or Fig. 3 and photochromic glass major lens 4 or 7 are brought into position for fusing, heated together to a heat treatment temperature range in which separation areas determining the photochromic properties of the glass are formed, 550‹ C. to 650‹ C., thereby fusing the parts together and subsequently cooling the parts rapidly so that the retention time in the heat treatment range is less than about 10 hours, the time sufficient to produce a turbidity in the glass. The reading segment may be of non-photochromic glass and both glasses may be of previous non-heat-treated photochromic glass and the photochromic areas of the glass are fully established by a further heating and cooling cycle. The reading segment 2 with polished surface 3 may be positioned on a support 1 in a metal ring 6 and the lower melting point glass 4 pressed downwardly after the heating step by a ram 2. Alternatively, the glass 7 may be provided with a polished recess 8 and the segment 9 of lower melting point glass positioned thereover by a metal alloy ring 10 which melts at about the temperature of softening of the segment 9 to flow off the convex surface of the glass 7 as the segment 9 sinks into the recess 8.
GB1817473A 1972-05-02 1973-04-16 Method of producing photochromic multifocal spectacle lenses Expired GB1396059A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2221488A DE2221488B2 (en) 1972-05-02 1972-05-02 Process for the production of photochromic multifocal lenses

Publications (1)

Publication Number Publication Date
GB1396059A true GB1396059A (en) 1975-05-29

Family

ID=5843868

Family Applications (2)

Application Number Title Priority Date Filing Date
GB1817473A Expired GB1396059A (en) 1972-05-02 1973-04-16 Method of producing photochromic multifocal spectacle lenses
GB4293674A Expired GB1399856A (en) 1972-05-02 1973-04-16 Method of producing photochromic multifocal spectacle lenses

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4293674A Expired GB1399856A (en) 1972-05-02 1973-04-16 Method of producing photochromic multifocal spectacle lenses

Country Status (13)

Country Link
JP (4) JPS5312925B2 (en)
AT (1) AT322764B (en)
BE (1) BE798940A (en)
CA (1) CA1011111A (en)
CH (2) CH548615A (en)
DE (1) DE2221488B2 (en)
DK (1) DK144968C (en)
ES (1) ES414198A1 (en)
FR (1) FR2183138B1 (en)
GB (2) GB1396059A (en)
IT (1) IT983040B (en)
NL (1) NL153834B (en)
SE (2) SE394995B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2221488B2 (en) * 1972-05-02 1975-06-19 Fa. Carl Zeiss, 7920 Heidenheim Process for the production of photochromic multifocal lenses
DE2609469C2 (en) * 1976-03-08 1983-05-11 Corning Glass Works, 14830 Corning, N.Y. Process for the production of photochromic, ophthalmic multifocall lenses
JPS52114341A (en) * 1976-03-22 1977-09-26 Corning Glass Works Method of manufacturing photochromic multiifocus spectacle lens
FR2346296A1 (en) * 1976-03-31 1977-10-28 Corning Glass Works Multifocal glass lens mfr. - using photochromic glass fused to another glass and heat treated
JPS58158318U (en) * 1982-04-17 1983-10-22 株式会社トーキン Laminated displacement element
JPS5937993U (en) * 1982-08-30 1984-03-10 日立冷熱株式会社 Heat exchange plate for cooling tower
JPS60177316A (en) * 1984-02-24 1985-09-11 Ngk Spark Plug Co Ltd Optical deflecting device
JPS61134726A (en) * 1984-12-06 1986-06-21 Ngk Spark Plug Co Ltd Optical deflector
JPS61132919A (en) * 1984-12-01 1986-06-20 Ngk Spark Plug Co Ltd Optical deflecting device
JP2006327844A (en) * 2005-05-23 2006-12-07 Olympus Corp Manufacturing method of optical element and its manufacturing apparatus
JP2008285377A (en) * 2007-05-18 2008-11-27 Panasonic Corp Joined optical element
JP2017048095A (en) * 2015-09-04 2017-03-09 旭硝子株式会社 Production method of glass

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR584639A (en) * 1924-08-14 1925-02-10 Optique Telegic Soc D Improvements in the manufacture of multiple focus lenses used in eyewear
DE514983C (en) * 1927-10-25 1930-12-20 Emil Busch Akt Ges Optische In Process for the production of a multi-thickness glass
US2026606A (en) * 1933-03-31 1936-01-07 Bausch & Lomb Means for making ophthalmic lenses
US3328182A (en) * 1963-06-24 1967-06-27 Corning Glass Works Phototropic glass article and method
DE2221488B2 (en) * 1972-05-02 1975-06-19 Fa. Carl Zeiss, 7920 Heidenheim Process for the production of photochromic multifocal lenses
JPS5853274B2 (en) * 1976-07-21 1983-11-28 石川島播磨重工業株式会社 rotary kiln
JPS5313207A (en) * 1976-07-23 1978-02-06 Hitachi Ltd Pumping apparatus

Also Published As

Publication number Publication date
BE798940A (en) 1973-08-16
GB1399856A (en) 1975-07-02
NL7306111A (en) 1973-11-06
CA1011111A (en) 1977-05-31
DE2221488B2 (en) 1975-06-19
JPS5340544A (en) 1978-04-13
JPS50105706A (en) 1975-08-20
JPS5312925B2 (en) 1978-05-06
JPS5313207B2 (en) 1978-05-09
IT983040B (en) 1974-10-31
CH547504A (en) 1974-03-29
AT322764B (en) 1975-06-10
JPS5724893B2 (en) 1982-05-26
SE414025B (en) 1980-07-07
SE7512290L (en) 1975-11-03
ES414198A1 (en) 1976-03-01
CH548615A (en) 1974-04-30
NL153834B (en) 1977-07-15
JPS5340543A (en) 1978-04-13
DK144968C (en) 1982-12-06
SE394995B (en) 1977-07-25
FR2183138B1 (en) 1976-06-11
DK144968B (en) 1982-07-19
FR2183138A1 (en) 1973-12-14
JPS5724894B2 (en) 1982-05-26
JPS4962152A (en) 1974-06-17
DE2221488A1 (en) 1973-11-22

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee