Optical head

Details Optical head Optical head

2006-05-30

2006-05-30

Nguyen, Hoa T. (Department: 2656)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S110010

Reexamination Certificate

active

07054253

ABSTRACT:
An optical head device including a phase correcting element having an anisotropic optical medium sandwiched between a pair of substrates. The paired substrates have surfaces provided with electrodes for voltage application to the anisotropic optical medium. One electrode on at least one of the substrates has two or more power supply electrodes provided thereon at different positions, thereby providing different voltages to the respective power supply electrodes. The phase correcting element is provided between a collimating lens and a quarter wave plate in the optical head device.

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Electronic translation of JP 10-188332.
Electronic translation of JP 8-74033.
Patent Abstracts of Japan, JP 10-221703, Aug. 21, 1998.

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