| 摘要 |
A multi-focal pick-up device for an optical storage system includes a light source and a fluid zoom lens. The fluid zoom lens is disposed along the optical axis of the light source. The fluid zoom lens includes a plurality of fluid layers. The fluid layers are immiscible to each other, and interfaces of the fluid layers have at least one curved surface. The curved surface can be adjusted by providing at least one voltage differential being applied to the fluid layers so as to form an adjustable curvature for the curved surface.
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