# US 9,753,310 B2 · Method for producing a polarized eyewear > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,753,310 B2 - Document ID: US9753310B2 - Status: Granted - Kind: B2 - Application number: 15/082,392 - Filed: 2016-03-28 - Published: 2016-09-29 - Granted: 2017-09-05 - Earliest claimed: 2015-03-26 - Assignees: Carl Zeiss Vision International GmbH - Applicants: Carl Zeiss Vision International GmbH - Inventors: Ben Ryan - Web page: https://patentgrep.com/patent/US9753310B2 ## CPC - G02C 7/12: Polarisers - B29D 11/00432: {Auxiliary operations, e.g. machines for filling the moulds (B29D11/00125 takes precedence)} - B29D 11/00644: {polarizing} - G02B 1/041: {Lenses} - G02B 1/08: made of polarising materials - G02C 7/105: {having inhomogeneously distributed colouring} - G02C 7/108: {Colouring materials} - G02C 2202/16: Laminated or compound lenses - G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00) - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A method for producing polarized eyewear is disclosed, which includes providing a polarizing film or a blank of the eyewear having a polarizing film, whereby the polarizing film is made of a substrate film and a polarizing agent; dipping the polarizing film or the blank with the polarizing film into a solvent; and dissolving the polarizing agent from the polarizing film. ## Claims ### Claim 1 A method for producing polarized eyewear, comprising: providing a polarizing film or an eyewear blank having the polarizing film, wherein the polarizing film includes a substrate film and a polarizing agent; dipping the polarizing film or the blank having the polarizing film into a solvent; and, dissolving the polarizing agent from the polarizing film, wherein the polarizing film or the blank having the polarizing film is dipped into the solvent for a duration of from 30 minutes to 250 minutes and the temperature of the solvent is kept between 15° C. and 38° C. ### Claim 2 (depends on 1) The method according to claim 1, wherein the substrate film comprises at least one member from the group consisting of polyvinyl alcohol, a polyvinyl alcohol derivative, a polyene film obtained by dehydrochlorinating a polyvinyl chloride film, and a polyene film obtained by dehydrating a polyvinyl alcohol film. ### Claim 3 (depends on 1) The method according to claim 1, wherein the polarizing agent comprises iodine, a dichroic dye, or iodine and a dichroic dye. ### Claim 4 (depends on 3) The method according to claim 3, wherein the dichroic dye is selected from the group consisting of an azo-compound bearing the functional group R—N═N—R, in which R and R can be independently either aryl or alkyl; a naphtha-compound; an anthraquinone-compound; and a mixture thereof. ### Claim 5 (depends on 1) The method according to claim 1, wherein the solvent comprises a polar agent. ### Claim 6 (depends on 5) The method according to claim 5, wherein the polar agent is selected from the group consisting of water, an alcohol, acetone, and a mixture thereof. ### Claim 7 (depends on 1) The method according to claim 1, wherein the solvent comprises a non-polar agent. ### Claim 8 (depends on 7) The method according to claim 7, wherein the non-polar agent is selected from the group consisting of CnHn, CnHn+2 toluene, chloroform, diethyl ether, and a mixture thereof. ### Claim 9 (depends on 1) The method according to claim 1, wherein the temperature of the solvent is kept between 38° C. and 40° C. while the polarizing film or the blank having the polarizing film is dipped into the solvent. ### Claim 10 (depends on 1) The method according to claim 1, wherein the polarizing film or the blank having the polarizing film is dipped into the solvent for a duration of from 30 minutes to 150 minutes. ### Claim 11 (depends on 1) The method according to claim 1, wherein the polarizing film or the blank having the polarizing film is dipped into the solvent with a varying depth of immersion. ### Claim 12 (depends on 11) The method according to claim 11, wherein the depth of immersion is reduced by more than 1 cm per 200 minutes. ### Claim 13 (depends on 11) The method according to claim 11, wherein the depth of immersion is increased by more than 1 cm per 200 minutes. ### Claim 14 (depends on 1) The method according to claim 1, wherein the solvent is moved relative to the polarized film or the blank having the polarized film while the polarized film or the blank having the polarized film is dipped in the solvent. ### Claim 15 (depends on 1) The method according to claim 1, wherein the solvent comprises a reactive agent capable of reacting with the polarizing agent. ### Claim 16 (depends on 1) The method according to claim 1, further comprising: casting the polarizing film or the blank having the polarizing film into a lens after dipping the polarizing film or the blank having the polarizing film into the solvent. ### Claim 17 (depends on 1) The method according to claim 1, wherein the temperature of the solvent is kept between 18° C. and 38° C. ### Claim 18 (depends on 14) The method according to claim 14, wherein the solvent is ultrasonically moved relative to the polarized film or the blank having the polarized film.