| 摘要 |
A light valve includes a rotatable disk, having a light modulating fluid layer on a writing surface of the disk, mounted for rotation on a cover plate assembly which combines the functions of a disk drive support plate and a baffle plate for hydrodynamically isolating the writing surface of the disk from contaminated fluid in a sump. The cover plate assembly is mounted on a light output window by engaging the window against a shoulder formed on a mounting rim projecting from the cover plate assembly and surrounding the disk. This structure protects the disk from particulate matter during assembly and permits the use of an assembly procedure which is more rapid and less likely to damage the disk. A modification of the device includes metal spacers mounted on a second shoulder formed on the rim for establishing a capillary distance between the light output window and the other surface of the disk.
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