| 摘要 |
PURPOSE:To enable visual field to move toward two directions, by the amount as needed, independently of each other by providing a means for offsetting both moves, a move of projection point toward X caused by rotation being driven by a rotary device and the other move of the projection point toward Y caused by shifting by means of a shifting device. CONSTITUTION:A button 11c of input circuit 11 is pushed to signal projection point C to move toward Y, drive pulse is generated from a drive circuit 9 according to a control signal from control section 10 and this drive pulse is fed into theta move step-motor 4theta to rotate a supporting bar 1 making the projection point C revolve round the fulcrum N constantly positioned on X axis. Simultaneously, the drive pulse is fed into r move step-motor 4r from the drive circuit 9 according to the control signal of the control section 10, making the supporting bar 1 shift and it moves the projection point C only toward Y by offsetting speed of the projection point C toward X by the theta move step-motor. It is same with X direction. |
