| 摘要 |
An optical modulation device includes first (1, 4, 6) and second (2, 5, 7) optically transmissive parallel plates having a fer- roelectric liquid crystal material sandwiched between them. A plurality of spacer members (10), each secured to one of the plates, are located between the plates to maintain the plate spacing. The spacer members form walls defining parallel liquid crystal mate- rial-containing channels (11) which extend parallel to the plates. These channels communicate along their lengths with cavities (12) at least partly defined by the spacer members (10). These cavities may be created by segmenting each wall, the separations between the successive segments constituting the respective cavities. Alternatively, each wall (14) may be provided with a parallel auxiliary wall (10) of lesser height close to it hut spaced from it, the spa ce between the two walls forming a cavity.
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