Optical: systems and elements – Polarization without modulation – Polarization by birefringence
Reexamination Certificate
2007-08-22
2011-12-06
Chapel, Derek S (Department: 2872)
Optical: systems and elements
Polarization without modulation
Polarization by birefringence
Reexamination Certificate
active
08072683
ABSTRACT:
Cartesian polarizers utilizing liquid crystal polymers (LCPs) are provided for use as laser protection filters in optical pick-up units. The LCPs are photo-aligned and cross-linked into a polymer host to provide a durable filter. According to one embodiment, the LCP molecules exhibit a cholesteric phase and are coupled to one or more quarter-wave retarders. According to another embodiment, the LCP molecules are used to form a multi-layer stack using the giant-birefringence optics effect.
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Hendrix Karen Denise
Tan Kim Leong
Chapel Derek S
JDS Uniphase Corporation
Pequignot Matthew A.
Pequignot & Myers LLC
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