Digital camera with motorized focus for high-precision measurements

摘要

The use of digital photogrammetric close-range systems for on-line measuring tasks is of special importance in industry. A camera with motorized focus is advantageous. High-precision measurements are possible, if an optonumerical-controlled sensor displacement is applied. Special illumination and filter technique inside the camera is used for the sensor orientation by means of reference marks projected onto the sensor. Investigations have been carried out to optimize the image analysis for reference mark measurements.