OPTICAL SENSOR PROJECTING AN IMAGE OF THE SENSOR FOR ALIGNMENT PURPOSES

摘要

An alignment system for an optical sensor projects an alignment image coincident with the field-of-view of the sensor. The alignment image is produced by illuminating a non-specular reflecting surface co-planar with the photosensitive element of the sensor and using the same lens as that which receives the image of the imaged object to project that image on the imaged object for alignment purposes. The light source may be turned off for normal use of the optical sensor.