Methods for the manufacture of ophthalmic lenses
The present invention provides methods and compositions for producing lenses by casting. The processes utilize a two-stage, ultraviolet cure to provide a fast and reliable method for producing ophthalmic lenses. A method for producing spectacle lenses comprising the steps of: (a) exposing to low int...
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| creator | SEKHARPURAM, VENKAT BASHAM, ELBERT DOGAN, REIC NUNEZ, IVAN ALTON, MICHELE |
| description | The present invention provides methods and compositions for producing lenses by casting. The processes utilize a two-stage, ultraviolet cure to provide a fast and reliable method for producing ophthalmic lenses. A method for producing spectacle lenses comprising the steps of: (a) exposing to low intensity ultraviolet light a mold assembly comprising a mold half and an optical preform and a surface-forming effective amount of a resin comprising reactive groups, the low intensity UV light exposure carried out under conditions suitable to convert at least about 50 percent or more of the resin reactive groups; and (b) exposing, subsequently, the resin to high intensity UV light under conditions suitable to substantially complete through curing of the resin and lens formation, wherein the low intensity ultraviolet light is about 1 to about 5 mW/cm at about 300 to about 450 nm and the high intensity ultraviolet light is about 500 to about 1500 mW/cm at about 300 to about 450 nm. |
| format | Patent |
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The processes utilize a two-stage, ultraviolet cure to provide a fast and reliable method for producing ophthalmic lenses. A method for producing spectacle lenses comprising the steps of: (a) exposing to low intensity ultraviolet light a mold assembly comprising a mold half and an optical preform and a surface-forming effective amount of a resin comprising reactive groups, the low intensity UV light exposure carried out under conditions suitable to convert at least about 50 percent or more of the resin reactive groups; and (b) exposing, subsequently, the resin to high intensity UV light under conditions suitable to substantially complete through curing of the resin and lens formation, wherein the low intensity ultraviolet light is about 1 to about 5 mW/cm at about 300 to about 450 nm and the high intensity ultraviolet light is about 500 to about 1500 mW/cm at about 300 to about 450 nm.</description><edition>7</edition><language>eng</language><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G ; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING ; CHEMISTRY ; COMPOSITIONS BASED THEREON ; CONTACT LENSES ; GENERAL PROCESSES OF COMPOUNDING ; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES ; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS ; METALLURGY ; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS ; OPTICS ; ORGANIC MACROMOLECULAR COMPOUNDS ; PERFORMING OPERATIONS ; PHYSICS ; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE ; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR ; SHAPING OR JOINING OF PLASTICS ; SPECTACLES ; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES ; THEIR PREPARATION OR CHEMICAL WORKING-UP ; TRANSPORTING ; WORKING OF PLASTICS ; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL ; WORKING-UP</subject><creationdate>2006</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060211&DB=EPODOC&CC=TW&NR=I248868B$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25563,76318</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20060211&DB=EPODOC&CC=TW&NR=I248868B$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SEKHARPURAM, VENKAT</creatorcontrib><creatorcontrib>BASHAM, ELBERT</creatorcontrib><creatorcontrib>DOGAN, REIC</creatorcontrib><creatorcontrib>NUNEZ, IVAN</creatorcontrib><creatorcontrib>ALTON, MICHELE</creatorcontrib><title>Methods for the manufacture of ophthalmic lenses</title><description>The present invention provides methods and compositions for producing lenses by casting. The processes utilize a two-stage, ultraviolet cure to provide a fast and reliable method for producing ophthalmic lenses. A method for producing spectacle lenses comprising the steps of: (a) exposing to low intensity ultraviolet light a mold assembly comprising a mold half and an optical preform and a surface-forming effective amount of a resin comprising reactive groups, the low intensity UV light exposure carried out under conditions suitable to convert at least about 50 percent or more of the resin reactive groups; and (b) exposing, subsequently, the resin to high intensity UV light under conditions suitable to substantially complete through curing of the resin and lens formation, wherein the low intensity ultraviolet light is about 1 to about 5 mW/cm at about 300 to about 450 nm and the high intensity ultraviolet light is about 500 to about 1500 mW/cm at about 300 to about 450 nm.</description><subject>AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G</subject><subject>AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING</subject><subject>CHEMISTRY</subject><subject>COMPOSITIONS BASED THEREON</subject><subject>CONTACT LENSES</subject><subject>GENERAL PROCESSES OF COMPOUNDING</subject><subject>INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES</subject><subject>INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS</subject><subject>METALLURGY</subject><subject>OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS</subject><subject>OPTICS</subject><subject>ORGANIC MACROMOLECULAR COMPOUNDS</subject><subject>PERFORMING OPERATIONS</subject><subject>PHYSICS</subject><subject>PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE</subject><subject>SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR</subject><subject>SHAPING OR JOINING OF PLASTICS</subject><subject>SPECTACLES</subject><subject>SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES</subject><subject>THEIR PREPARATION OR CHEMICAL WORKING-UP</subject><subject>TRANSPORTING</subject><subject>WORKING OF PLASTICS</subject><subject>WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL</subject><subject>WORKING-UP</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2006</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDDwTS3JyE8pVkjLL1IoyUhVyE3MK01LTC4pLUpVyE9TyC_IKMlIzMnNTFbISc0rTi3mYWBNS8wpTuWF0twMCm6uIc4euqkF-fGpxQWJyal5qSXxIeGeRiYWFmYWTk7GRCgBAB4VK4g</recordid><startdate>20060211</startdate><enddate>20060211</enddate><creator>SEKHARPURAM, VENKAT</creator><creator>BASHAM, ELBERT</creator><creator>DOGAN, REIC</creator><creator>NUNEZ, IVAN</creator><creator>ALTON, MICHELE</creator><scope>EVB</scope></search><sort><creationdate>20060211</creationdate><title>Methods for the manufacture of ophthalmic lenses</title><author>SEKHARPURAM, VENKAT ; 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The processes utilize a two-stage, ultraviolet cure to provide a fast and reliable method for producing ophthalmic lenses. A method for producing spectacle lenses comprising the steps of: (a) exposing to low intensity ultraviolet light a mold assembly comprising a mold half and an optical preform and a surface-forming effective amount of a resin comprising reactive groups, the low intensity UV light exposure carried out under conditions suitable to convert at least about 50 percent or more of the resin reactive groups; and (b) exposing, subsequently, the resin to high intensity UV light under conditions suitable to substantially complete through curing of the resin and lens formation, wherein the low intensity ultraviolet light is about 1 to about 5 mW/cm at about 300 to about 450 nm and the high intensity ultraviolet light is about 500 to about 1500 mW/cm at about 300 to about 450 nm.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON CONTACT LENSES GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP |
| title | Methods for the manufacture of ophthalmic lenses |
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