[특허]Method for producing laminated photochromic lenses

Method for producing laminated photochromic lenses 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B29D-011/00
출원번호	UP-0448485 (2006-06-07)
등록번호	US-7842204 (2011-01-31)
발명자 / 주소	Chiu, Hao Wen
출원인 / 주소	Essilor International (Compagnie Generale d'Optique)
대리인 / 주소	Keusey & Associates, P.C.
인용정보	피인용 횟수 : 0 인용 특허 : 71

초록 ▼

A method for laminating an optical assembly and the optical assembly formed thereby. An ultra thin lens is injection molded and may include a bifocal feature. A support lens, e.g. of the single vision type, is provided with a photochromic coating. A flexible two stage compound application process pr

대표청구항 ▼

What is claimed is: 1. A method for producing laminated photochromic lenses by forming a sandwich consisting of a photochromic layer, a primer layer and an adhesive layer between a support lens and a front lens comprising: providing an injection molding machine with inserts secured within their respective sleeves so that force exerted on the inserts by a molding material is transferred to a mold clamp; injecting thermoplastic molding material in one shot to force a mold open and coining an ultra thin front lens with an integral bifocal region as the mold begins to close, wherein the ultra thin front lens has a substantially uniform thickness of less than 0.8 mm outside the bifocal region; solidifying a liquid photochromic solution in situ onto a single vision (SV) support lens without pressure to form a photochromic layer directly on a SV support lens surface in the absence of an intermediate layer; coating a primer layer directly onto the photochromic layer; applying an adhesive layer to be directly in contact with the primer layer and the ultra thin front lens; and laminating said ultra thin front lens onto said primer layer with adhesive and compressive pressure, whereby the shape of the ultra thin front lens can be deflected up to 0.5 base curves to completely conform to the shape of the SV support lens surface. 2. The method of claim 1, wherein said injection molding step comprises injection molding an ultra thin lens from polycarbonate having a viscosity of less than 400 Pa for shear rates below 1,000/s. 3. The method of claim 2, wherein said injection molding step comprises coining an ultra thin lens having a thickness between 0.8 mm and 0.3 mm. 4. The method of claim 2, wherein said injection molding step comprises injection molding an ultra thin lens having a thickness between 0.7 mm and 0.5 mm. 5. The method of claim 3, wherein the ultra thin front lens comprises a straight top bifocal lens having an add power between +1.00 and +3.00 diopters. 6. The method of claim 1, wherein the primer layer includes a polyurethane latex primer. 7. The method of claim 6, wherein the primer is spin-coated onto a convex surface of the lens at room temperature then dried at a temperature between 50 degrees and 100 degrees C. to form the primer layer. 8. The method of claim 6, wherein said adhesive layer includes an optical adhesive. 9. The method of claim 8, wherein said applying step comprises applying at least one drop of UV curable optical adhesive. 10. The method of claim 9, wherein said UV curable optical adhesive comprises an acrylate. 11. The method of claim 6, wherein said applying step comprises applying a pressure sensitive adhesive film. 12. The method of claim 1, wherein said laminating step occurs at room temperature with a pressure between 5 psi and 60 psi. 13. The method of claim 1, wherein said laminating step occurs at room temperature with a pressure between about 10 psi and about 25 psi. 14. The method of claim 12, wherein said laminating step comprises inflating a silicon rubber bladder to apply pressure onto the ultra thin front lens. 15. The method of claim 1, wherein the ultra thin lens comprises a straight top bi-focal lens having an add power of between +1.00 and +3.00 diopters. 16. The method of claim 15, wherein the straight top bi-focal lens includes a front surface that is coated with one of a hard coat and an antireflective coating. 17. The method of claim 16, wherein the SV support lens has a back surface that is adapted to be ground so that the SV support lens prescription can be customized, thereby providing a straight top bi-focal lens with photochromic properties contributed by a uniformly thick, internally laminated photochromically active layer.

이 특허에 인용된 특허 (71)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Method for producing laminated photochromic lenses 원문보기

초록 ▼

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연구과제 타임라인

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Method for producing laminated photochromic lenses 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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