Retardation films having single retardation value with...

Details Retardation films having single retardation value with... Retardation films having single retardation value with...

2011-06-28

2011-06-28

Nguyen, Hoan C (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S117000, C349S118000, C349S120000, C349S121000

Reexamination Certificate

active

07969543

ABSTRACT:
This invention pertains to the design and construction of retardation films (or plates) with any targeted dispersive property, including those with no wavelength dependence for the entire visible range. In particular, this invention deals with specific design of films with broadband (achromatic) quarterwave and halfwave retardation.

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Pancharatnam, S.;Achromatic Combinations of Birefringent Plates; Part I. An Achormatic Circular Polarizer; Memoir No. 71 of the Raman Research Institute, Bangalore (1955) 130-136.
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