GB1399856A - Method of producing photochromic multifocal spectacle lenses - Google Patents
Method of producing photochromic multifocal spectacle lensesInfo
- Publication number
- GB1399856A GB1399856A GB4293674A GB4293674A GB1399856A GB 1399856 A GB1399856 A GB 1399856A GB 4293674 A GB4293674 A GB 4293674A GB 4293674 A GB4293674 A GB 4293674A GB 1399856 A GB1399856 A GB 1399856A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- turbidity
- photochromic
- ram
- segment
- 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
Links
Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/10—Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses
- G02C7/102—Photochromic 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)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
1399856 Multifocal glass lenses CARL ZIESS-STIFTUNG (trading as CARL ZEISS] 16 April 1973 [2 May 1972] 42936/74 Heading C1M [Also in Division G2] Photochromic-multifocal glass lenses are produced by fusing a reading glass segment 3 to a photochromic major glass lens 1, the major lens being heated rapidly to a range of turbidity between 650 and 900 C., the reading segment being heated to a temperature below the range of turbidity, preferably below the range of heat treatment, 550 to 650 C., at which the photochromic properties of the glass are developed, the heating then being stopped, the reading segment 3 being pressed, as by a ram 2, into the hot major lens 1 to fuse them together and cooling the fused parts such that the time of the fused parts in the ranges of turbidity and heat treatment is less than the time sufficient to produce turbidity in the glass, a period of less than 10 hours, preferably 3 hours. The reading segment may be of non-photochromic glass. The major lens 1 is shaped by the convex ram 2 to a concave surface. Alternatively a concave ram may be used.
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 |
|---|---|
| GB1399856A true GB1399856A (en) | 1975-07-02 |
Family
ID=5843868
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4293674A Expired GB1399856A (en) | 1972-05-02 | 1973-04-16 | Method of producing photochromic multifocal spectacle lenses |
| GB1817473A Expired GB1396059A (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 |
|---|---|---|---|
| GB1817473A Expired GB1396059A (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) | CH547504A (en) |
| DE (1) | DE2221488B2 (en) |
| DK (1) | DK144968C (en) |
| ES (1) | ES414198A1 (en) |
| FR (1) | FR2183138B1 (en) |
| GB (2) | GB1399856A (en) |
| IT (1) | IT983040B (en) |
| NL (1) | NL153834B (en) |
| SE (2) | SE394995B (en) |
Families Citing this family (12)
| 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)
| 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 |
-
1972
- 1972-05-02 DE DE2221488A patent/DE2221488B2/en not_active Ceased
-
1973
- 1973-04-02 AT AT287273A patent/AT322764B/en not_active IP Right Cessation
- 1973-04-16 GB GB4293674A patent/GB1399856A/en not_active Expired
- 1973-04-16 GB GB1817473A patent/GB1396059A/en not_active Expired
- 1973-04-18 CH CH553073A patent/CH547504A/en not_active IP Right Cessation
- 1973-04-18 CH CH552973A patent/CH548615A/en not_active IP Right Cessation
- 1973-04-27 SE SE7305978A patent/SE394995B/en unknown
- 1973-04-28 ES ES414198A patent/ES414198A1/en not_active Expired
- 1973-04-30 IT IT49730/73A patent/IT983040B/en active
- 1973-04-30 BE BE130607A patent/BE798940A/en unknown
- 1973-05-01 CA CA170,140A patent/CA1011111A/en not_active Expired
- 1973-05-01 DK DK236473A patent/DK144968C/en active
- 1973-05-01 JP JP4901073A patent/JPS5312925B2/ja not_active Expired
- 1973-05-02 NL NL737306111A patent/NL153834B/en not_active IP Right Cessation
- 1973-05-02 FR FR7315676A patent/FR2183138B1/fr not_active Expired
- 1973-08-01 JP JP8671773A patent/JPS5313207B2/ja not_active Expired
-
1975
- 1975-11-03 SE SE7512290A patent/SE414025B/en unknown
-
1977
- 1977-09-09 JP JP10869877A patent/JPS5340544A/en active Granted
- 1977-09-09 JP JP10869777A patent/JPS5340543A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DK144968B (en) | 1982-07-19 |
| JPS4962152A (en) | 1974-06-17 |
| JPS5313207B2 (en) | 1978-05-09 |
| AT322764B (en) | 1975-06-10 |
| FR2183138B1 (en) | 1976-06-11 |
| SE7512290L (en) | 1975-11-03 |
| NL7306111A (en) | 1973-11-06 |
| JPS5340543A (en) | 1978-04-13 |
| SE394995B (en) | 1977-07-25 |
| CA1011111A (en) | 1977-05-31 |
| GB1396059A (en) | 1975-05-29 |
| FR2183138A1 (en) | 1973-12-14 |
| BE798940A (en) | 1973-08-16 |
| IT983040B (en) | 1974-10-31 |
| DE2221488A1 (en) | 1973-11-22 |
| JPS5724893B2 (en) | 1982-05-26 |
| DE2221488B2 (en) | 1975-06-19 |
| SE414025B (en) | 1980-07-07 |
| JPS50105706A (en) | 1975-08-20 |
| CH547504A (en) | 1974-03-29 |
| JPS5312925B2 (en) | 1978-05-06 |
| DK144968C (en) | 1982-12-06 |
| CH548615A (en) | 1974-04-30 |
| JPS5340544A (en) | 1978-04-13 |
| ES414198A1 (en) | 1976-03-01 |
| NL153834B (en) | 1977-07-15 |
| JPS5724894B2 (en) | 1982-05-26 |
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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 |