Scanning probe microscope
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United States of America Patent
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Feb 23, 2021
Grant Date -
May 7, 2020
app pub date -
Jun 28, 2018
filing date -
Jun 28, 2017
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A scanning probe microscope with a first actuator (3) configured to move a feature in the form of a tip (2) so that the feature follows a scanning motion. A vision system (10) is configured to collect light from a field of view to generate image data. The field of view includes the feature and the light from the field of view travels from the feature to the vision system via the steering element (13). A tracking control system (15)bis configured to generate one or more tracking drive signals in accordance with stored reference data. A second actuator (14) is configured to receive the one or more tracking drive signals and move the steering element on the basis of the one or more tracking drive signals so that the field of view follows a tracking motion which is synchronous with the scanning motion and the feature remains within the field of view. An image analysis system (20) is configured to analyse the image data from the vision system to identify the feature and measure an apparent motion of the feature relative to the field of view. A calibration system is configured to adjust the stored reference data based on the apparent motion measured by the image analysis system.
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