Abstract:This paper describes a focus adjustment system particularly designed for the fast-mechanical-scanning and phase-sensitive laser probe for radio frequency (RF) surface and bulk acoustic wave (SAW/BAW) devices. When high spatial resolution is necessary for the observation, one needs an objective lens of large magnifying power with extremely shallow focal depth. Then a tiny inclination of a measurement device may cause severe defocus resulting in blurred images. We installed the focus adjustment system in the las… Show more
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