A method for associating a calendar invitation for a calendar event to a web conference for a web conference event is provided. A signal processor carries out a measurement on the received reflected light such as the distance to the target object each time the reflected light is received. The ESD protection circuit includes a first crossing line, a second crossing line, and a first ESD protection device. The tray may be used to orient and verify the tomography scan data set and the surface scan data set to create a combined master data file that may be used to determine the appropriate location for a dental implant or other dental procedure.