| 摘要 |
A tunable microlens uses a layer of photo-conducting material which results in a voltage differential between at least one of a plurality of electrodes and a droplet of conducting liquid when a light beam is incident upon the photo-conducting material. Such a droplet, which forms the optics of the microlens, moves toward an electrode with a higher voltage relative to other electrodes in the microlens. In one embodiment, when a misalignment of the beam and microlens occurs, an electronic circuit creates the aforementioned differential. In a second embodiment, two layers of electrodes are used, an upper layer and a lower layer. Each electrode in a lower layer of electrodes is electrically coupled to an electrode in the upper layer directly opposed to the lower-layer electrode. When the light beam is misaligned with the microlens, a voltage differential between the droplet and the electrodes in the upper layer automatically causes the droplet, and hence the microlens, to realign itself with the beam.
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