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Negative dispersion retarder using two negative birefringence films.

Anoop Kumar Srivastava, Seungbin Yang, Ji-Hoon Lee

|June 16, 2015

Summary

Researchers developed negative dispersion retarders for display devices. Optimizing polystyrene and poly-methylmethacrylate films achieved achromatic response and wide viewing angles, crucial for advanced displays.

Area of Science:

Optics and Photonics
Materials Science

Background:

Achieving achromatic response and wide viewing angles in displays is a significant challenge.
Retarders exhibiting negative birefringence and negative dispersion are key to overcoming these limitations.

Purpose of the Study:

To demonstrate negative dispersion half-wave and quarter-wave retarders.
To optimize material properties and structural angles for enhanced optical performance in display applications.

Main Methods:

Utilizing polystyrene and poly-methylmethacrylate films.
Optimizing the retardation and the angle between the extraordinary axes of the polymer films.
Fabricating and characterizing half-wave and quarter-wave retarders.

Main Results:

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Successfully demonstrated negative dispersion half-wave and quarter-wave retarders.
Identified optimum angles of 40° for half-wave retarders and 70° for quarter-wave retarders.
Achieved desired optical properties by tuning retardation values.

Conclusions:

The developed retarders offer a viable solution for achieving achromatic response and wide viewing angles.
Optimized polymer film configurations provide a pathway for next-generation display technologies.