Invention Grant
- Patent Title: Clear to circular polarizing photochromic devices
- Patent Title (中): 透明至圆偏振光致变色器件
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Application No.: US12873491Application Date: 2010-09-01
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Publication No.: US08077373B2Publication Date: 2011-12-13
- Inventor: Anil Kumar , Peter C. Foller , Elizabeth Furar , Forrest R. Blackburn
- Applicant: Anil Kumar , Peter C. Foller , Elizabeth Furar , Forrest R. Blackburn
- Applicant Address: US FL Pinellas Park
- Assignee: Transitions Optical, Inc.
- Current Assignee: Transitions Optical, Inc.
- Current Assignee Address: US FL Pinellas Park
- Agent Deborah M. Altman; Frank P. Mallak
- Main IPC: G02F1/03
- IPC: G02F1/03
Abstract:
The present invention provides composite optical elements including a photochromic linear polarizing element and a birefringent layer such that composite optical element circularly or elliptically polarizes transmitted radiation. The photochromic linear polarizing element is formed from (i) an at least partially ordered polymeric sheet; and (ii) a reversible photochromic-dichroic material that is at least partially aligned with the polymeric sheet and has an average absorption ratio of at least 1.5 in the activated state. The birefringent layer includes a polymeric coating or a polymeric sheet connected to the photochromic linear polarizing element.
Public/Granted literature
- US20110080628A1 CLEAR TO CIRCULAR POLARIZING PHOTOCHROMIC DEVICES Public/Granted day:2011-04-07
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