Automatic Phase Calibration of Two-Dimensional Resonant Scanners
Introduction Mechanically resonant scanners are widely used in optical or near-field imaging. The scanner can trace out imaging beam paths in two-dimensional space in response to a drive waveform near the scanner’s mechanical resonant frequency. The mechanical response will not in general be in phase with the driving signal and the phase difference can vary as a function of the scanning radius, and this phase difference will make a given pixel acquired at a given position different from what is predicted by the drive waveform, resulting in severe image distortion. In order to correct the distortion, the actual mechanical response must be known in order to map each acquired data point to the correct location (or pixel) in space. Measuring the actual response directly can be cumbersome or require special equipment. Technology description Researchers at the UW have developed an approach which can automatically measure and correct the phase difference of a resonant scanner. The approach will image a target with a known regular geometry and compare detected (or actual) position of the known structure with the predicted position. The technique is simple and fast. Business opportunity Resonant two-dimensional scanners have attracted interest for a number of imaging applications because of their simple design and small size. In particular medical imaging could benefit from the use of this phase correction technology. Stage of development Initial data and a working model exist for this technology. Intellectual property position The technology is available for licensing. The UW is currently reviewing this technology for worldwide patent protection.Type of Offer: Licensing
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