PROCESS FOR OPTICAL MEASUREMENT OF RELATIVE ANGLES

摘要

The method involves using a light beam fanned to a strip emitted by the measurement device and reflected (6) back from reflective surfaces at the measurement points to be received by the measurement device. The emitted light is pivoted or esp. rotated about an axis. As the light passes through the start of a defined angle range wrt. the measurement device a count is started which continues until the beam reaches the end of the angle range. When a reflected light beam is received the corresp. count state is stored and the relative angle derived by evaluating the count state ratio. At least two light beams (LA,LB) are emitted tangentially wrt. a circular arc centrally positioned wrt. the rotation axis.