Vishay has release of two high-resolution automotive grade optical reflective proximity sensors that operate down to 20µm for force sensing applications. In use, an infra-red beam is sent out and its reflection detected. Sensing can be from up-close to half a meter away, and can have enough resolution to detect the displacement of a surface ...

This story continues at I2C infra-red proximity sensor measures to 20µm movement or at 500mm range

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