Piezo actuators from Physik Instrumente (PI) are used in pixel sub-stepping, a method for improving the resolution of digital cameras and scanners. This is achieved by quickly and precisely moving the sensor at distances of less than one pixel along the X and Y axes (dithering). High-speed electronics compute images with sub-pixel-size resolution.
Piezo actuators suitable for dithering not only operate with the required speed, dynamics, linearity and reproducibility, but also can meet MIL standards, being proven to withstand tough operational conditions. What’s more, they are compact and can be easily integrated into the relevant application.
Applications therefore exist across the whole field of imaging. Typical uses are in biometric fingerprint scanners, infrared cameras and camera systems for cartographic aerial photography.
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