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- W2137775097 abstract "To the best of our knowledge, proposed is the first distance-measurement sensor using direct spatial signal processing. The sensor is implemented using a laser beam engaged in target-dependent spatial beam processing using an electronically controlled variable focus lens (ECVFL). Specifically, the target-reflected beam is observed by an optical detector while electronically scanning the focal length of the ECVFL in the path of the laser beam. A received-beam minimum spatial size corresponds to a specific ECVFL focal length that in turn is used to compute the sensed target distance. Experiments have been conducted using a 633 nm He-Ne laser and a liquid ECVFL, giving target distance measurements from 6to109 cm with a <1.7% sensor resolution. Various noncontact applications for the sensor include sensing of object measurement parameters of distance, motion displacement, three-dimensional structure, spatial profile, and levels." @default.
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- W2137775097 date "2009-02-09" @default.
- W2137775097 modified "2023-09-23" @default.
- W2137775097 title "Noncontact distance sensor using spatial signal processing" @default.
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- W2137775097 doi "https://doi.org/10.1364/ol.34.000434" @default.
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