Invention Grant
- Patent Title: Photochromic optical article
- Patent Title (中): 光致变色光学制品
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Application No.: US12541089Application Date: 2009-08-13
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Publication No.: US07884992B1Publication Date: 2011-02-08
- Inventor: Yun-Cheng Wang , Yi-Tang Wang
- Applicant: Yun-Cheng Wang , Yi-Tang Wang
- Applicant Address: TW Taichung
- Assignee: Darwin Optical Co., Ltd.
- Current Assignee: Darwin Optical Co., Ltd.
- Current Assignee Address: TW Taichung
- Agency: Townsend and Townsend and Crew, LLP
- Main IPC: G02F1/03
- IPC: G02F1/03 ; G02F1/13 ; G02B5/30 ; G02C5/00
Abstract:
A photochromic optical article comprises a substrate, and a photochromic coating coated on an outer surface of the substrate and having at least two photochromic layers. Each of the photochromic layers has a composition that contains a carrier and at least one photochromic dye. The compositions of the photochromic layers are different from each other.
Public/Granted literature
- US20110038024A1 PHOTOCHROMIC OPTICAL ARTICLE Public/Granted day:2011-02-17
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