| 摘要 |
PURPOSE:To read a coordinate easily with high accuracy even if reading information is given from the upper part by means of projection or the like by confirming clearly a coordinate position indexing point. CONSTITUTION:In reading the projected picture f' from a digitizer upper part, first a cursor 14 is placed on a coordinate position detecting plane 3a of a table and the focus of the projected picture f' is matched to the upper surface of a cursor main body 1. Then, a desired picture position coordinate point (g) is matched to an indexing point 12 of the upper surface on the cursor light emitted from a light emitting diode 6 by moving the cursor 14 on the coordinate position detecting plane 3a. The position coordinate is inputted by applying an AC signal to an input coil 2 after depressing a push button 5a and generating a magnetic field. |
