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This work proposes an innovative solid-state variable micro aperture with no moving component. The aperture size can be varied by the change of applied voltage. PDLC (polymer dispersed liquid crystal) plays an important role in tunability of this device. By combing a micro dome structure and the PDLC, the tum-on threshold voltage at a farther radial position to the aperture center can be made higher...
In this paper, we present a novel idea to construct a secondary solar concentrator with a circular micro prism array. Ray tracing software, FRED, is used to evaluate our proposed structure, in which the incident light rays are deflected by total internal reflection and the optical energy is concentrated and collected at the center. For this proposed secondary concentrator, an optical efficiency of...
A 1/spl times/N/sup 2/ wavelength-selective switch is demonstrated using a high fill-factor two-axis analog micromirror array and a monolithic 2D collimator array. A 1/spl times/2 (scalable to 1/spl times/14 ) WSS with 50-GHz channel spacing is experimentally demonstrated.
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