Polarization dependent writing and erasing process for organic o

Details Polarization dependent writing and erasing process for organic o Polarization dependent writing and erasing process for organic o

1992-02-13

1993-10-05

Anderson, Bruce C.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

G11B 700

Patent

active

052511979

ABSTRACT:
A writing/erasing method for use in connection with homotropic organic optical media is disclosed and claimed. The method includes writing on a thin film with light of a first linear polarity to induce birefringence along the direction of an optical axis of the film's initial state followed by erasing the film with light of a second linear polarity. The first and second linear polarities are angularly offset with respect to one another, preferably by 90 degrees.

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"Photoreaction in mesogenic media", Stumpe et al. Makromol. Chem., Rapid Commun. 12, pp. 81-87.
"An Infrared Spectroscopic Study of Photo-induced Reorientation in Dye Containing Liquid-Crystalline polymers", Weismer et al., Liquid Crystals, vol. II, No. 2, pp. 251-267, 1992.

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