Optical detection system, esp. for generating position signals

摘要

The system has a plate carrying a raster arrangement (44) whose movement and position can be determined by sensors. The raster arrangement is mounted on a raster plate (40) with elongated position openings (46) perpendicular to a scanning direction and an elongated identification opening (48) inclined wrt. the scan direction. A detection device (52) has a light source on one side of the raster plate and two sensors (54,56) on the other side of the raster plate for detecting the light emitted from the light source and passing through the individual openings to generate corresp. detection signals. A control circuit connected to both sensors converts the sensor signals into corresp. position or displacement signals. An Independent claim is also included for.